CN1321803C - Electrostatic shielding, low charging-retaining moisture barrier film - Google Patents

Abstract

The present invention provides a thin-film material used for packaging an electrostatic sensitive element and a corrosion sensitive element, which comprises an electrostatic dissipation polymer (1) fixed to a first moisture isolating layer (2), wherein the first moisture isolating layer is fixed to a second moisture isolating layer which has a coating layer (4) of low electric charge retention rate; each moisture isolating layer is formed from metal foil or is formed by the spraying of metal polymers; the thickness for a metal sprayed surface is at least 178 cupola; the metal of the second moisture isolating layer (8) contacts the coating layer of low electric charge retention rate.

Description

The low charging-retaining moisture barrier film of electrostatic screen

Technical field

The present invention relates to low charging-retaining moisture barrier film as the electrostatic screen of package.

Technical background

The electrostatic screen film is used to make the package of various electronic components.These films protect these electronic components not to be subjected to the influence of electrostatic field and voltage usually.As time goes on, electronic component has become more and more to electrostatic potential and electric current sensitivity.In addition, along with the allowable tolerance of electronic component is more and more harsher, also more and more important by the tolerance variation that corrosion causes.

For example, the read/write head of disc driver rapidly rotates on the spinning disk with magnetization coating and the variation of magnetic flux is read as data.When these read/write heads are responsive more to the variation of magnetic flux, on disk, can store more data.Recently, disk drive industry begins to replace the sensed data read head with magnetic hysteresis resistance (MR) and huge magnetic hysteresis resistance (GMR) read head.These read heads than former read head to big several times of the sensitivity of magnetic flux.Compare with the sensed data read head, the MR/GMR read head uses thin conductor and insulator.This structure makes these read heads responsive more to transient current.

One of such transient current is exactly human body with inevitably originating usually.Electrostatic charge accumulates on the health by triboelectrification.By static discharge, the dynamic release of the electric charge of storage can produce appreciable electric current and energy.Discharging electric charge from human body can be simulated by resistance (R/C) network with 1500 Ohmic resistances and 100 micromicrofarad electric capacity.Such R/C network can produce the voltage more than 15000 volts.The test shows of MR read head, this device will make that changing appears inresistance 35 volts the time only discharging.What is more important is 23 milliamperes and energy is 9 millimicro joules (10 at electric current^-9) time, the magnetic fault threshold also is 35 volts.Device produces fusing and scar then takes place when discharge charge is about 80 volts.Therefore it is just more and more important these devices to be increased electrostatic protection.

Along with product becomes more and more littler and more and more thinner, it is more and more important that the corrosion of electronic component also becomes.Corrosion is particularly important for the MR read head.Because the MR read head is more responsive to magnetic flux, so they can rapidly rotate near on the distance of product more.Because the MR read head can rapidly rotate near on the distance of product more, reduce in the space that is used for stored information.Distance between read head and the dish can be less than 0.05 micron.Along with the development of technology, this distance further reduces.Because corrosion has changed dimensional tolerance between the parts, therefore the corrosion that limits on the electronic component with strict form tolerance becomes more and more important.

The corrosion of the great majority of electronic component is the function of the quantity of the moisture that contacts of material and steam.In manufacture process, can take some step from package, to get rid of steam by introducing dry air.Yet steam moist in transportation may pass package.

In the manufacturing of MR/GR read head and installation process, can observe the destruction of taking similar method to avoid the transient current that static discharge causes usually.All working surfaces have all been got rid of static, and what pay particular attention to is that the flow of charge of different resistance materials is controlled.But MR read head and similarly comparatively responsive electronic component must transport.For example, the MR read head is transported to the place that read head is assembled from the manufacturing location of read head usually with the device that comprises the MR read head, arrives final driver assembling place then.In the process of transportation MR read head, other electronic component is influenced by static discharge and steam.For the protection of height is provided, these materials should shield electrostatic charges for these products, avoid electric charge to keep and prevent that steam from passing material.

Product of the prior art does not provide enough static and moisture protection.Disclose internal layer electrostatic material, the first metal layer, single thin layer, second metal level among about patent US4699830 that licensed to Mr.White on the 13rd in 1987 10 and be positioned at thin layer transparent wear on the outer surface of thin-film material.This material is transparent.In order to make material transparent, metal level must be thin especially, and each metal layer thickness is on the 20 dust orders of magnitude.The metal material of this thickness can't provide enough protection to resist the outside voltage that surpasses 1000 volts.In addition, need enough thin metal that the moisture function can not be provided with the formation transparent material.At last, enough thin metal being made transparent most realistic method is deposited on these metals on the plastic sheeting by CVD method exactly.As disclosed in the patent of White, it is very difficult and expensive depositing on two surfaces of a single thin film with CVD method.

Another one attempts to solve that the patent of moisture and certain electrostatic protection is provided is to license to the patent US4971196 of Kitamura November 20 nineteen ninety.This patent disclosure three embodiment, one of them embodiment is relevant especially.The structure of this embodiment is the polyethylene that comprises internal layer; this internal layer has the antistatic layer that is connected on the aluminium foil thin layer; this aluminium foil thin layer is connected on the polyester thin layer conversely; and then connect the conductive plastics layer add carbon, on adding the conductive plastics layer of carbon, this connects the protective layer of non-conductive acrylic-type at last.This material has several problems.Although aluminium foil and polymeric layer can provide limited moisture and electrostatic screen, its outer field polymeric layer will keep electric charge.This electric charge keeps and may cause static discharge from package when electronic component takes out and destroy electronic component in the package.And because moisture and electrostatic protection all realized by single layer, this layer any pierces through, pin hole and other defect all will weaken its protective effect.In addition, metal forming is more expensive and be difficult to handle than spray metal polymer.

Summary of the invention

The present invention solves defective of the prior art by film is provided.This film has good electrostatic protection and moisture performance, and can not keep electric charge on the surface of film.This low charging-retaining thin-film material has double-deck moisture layer, simultaneously also as double-deck electrostatic screen layer.These moisture layers are made by polymer moisture layer or metal forming.In a preferred embodiment, the first moisture layer is a polymer moisture layer.Polymer such as polyester, polypropylene, nylon or polyethylene are as the supporting construction on this surface, first spray metal.The surface, spray metal is the metal level that deposits on the polymer support structure by CVD method.This metal is preferably aluminium, but also can be steel, gold or copper.The first polymer moisture layer is fixed on the heat seal electrostatic dissipation polymer, and this electrostatic dissipation polymer is preferably polyethylene or polypropylene or polyurethane.Binding agent articulamentum or polymer can be used for the first polymer moisture layer is fixed to heat seal electrostatic dissipation polymer.The use of heat seal electrostatic dissipation polymer allows film to be heat sealed to himself, to form bag, coating or packaging material.

Then the second polymer moisture layer that is similar to the first polymer moisture layer is fixed on the first polymer moisture layer.The articulamentum of binding agent or polyethylene or other polymer is preferably used in the first polymer moisture layer is connected on the second polymer moisture layer.This binding agent is preferably the solvent that contains polyurethane-base.The surface, first spray metal of the second polymer moisture layer is back to the first polymer moisture layer.The low charging-retaining coating is set on the surface, spray metal of the second polymer moisture layer.The electrical conductivity of this coating and the combination of surface, spray metal is 10^-3-10^-10Siemens is preferably 10^-6Siemens.When this thin-film material was used for packaging electronic components, the first and second polymer moisture layers protected these electronic components not to be subjected to the influence of static discharge as faraday cup.The own neutral of low charging-retaining coating assurance package that contact with surface, the spray metal of the second polymer moisture layer, and can be apace discharge electric charge from the surface of bag.Moving of two polymer moisture layer restriction moisture, thus protection is placed into the influence that the electronic component in the package of being made by this thin-film material is not corroded.

In second embodiment, heat seal electrostatic dissipation polymer is preferably polyethylene, is fixed to anti-stab polymer, is preferably on the double orientation nylon.This anti-stab polymer is as stable dimensionally insulating polymer.This stable dimensionally insulating polymer utilizes articulamentum, is preferably the hot melt polyethylene, is fixed on the metal forming.Metal foil layer is preferably the aluminium foil that thickness is 0.0089mm (0.00035 inch).Second articulamentum is preferably binding agent, is fixed on the polymer moisture layer, and this polymer moisture layer has the surface, first spray metal and second nonmetallic surface.Second nonmetallic surface of polymer moisture layer contacts with second articulamentum.The surface, first spray metal of polymer moisture layer has the low charging-retaining coating.The electrical conductivity of polymer moisture layer and the combination of low charging-retaining coating is 10^-3-10^-10Siemens is preferably 10^-6Siemens.

In the 3rd embodiment, heat seal electrostatic dissipation polymer is fixed to the first polymer moisture layer that structure is similar to the polymer moisture layer among first embodiment.This polymer moisture layer is preferably binding agent by first articulamentum, is fixed on the stable dimensionally insulating polymer.Anti-stab polymer is preferably double orientation nylon.This nylon is as stable dimensionally insulating polymer.Second articulamentum, preferably the hot melt polyethylene can be a binding agent also still, is used for stable dimensionally insulating polymer is fixed to metal foil layer.This metal forming is preferably the aluminium foil that thickness is about 0.0089 millimeter (0.00035 inch).This metal foil layer is as the second moisture layer, thereby the electronic component that provides faraday cup to think to be placed in any package of being made by film of the present invention provides electrostatic protection.The low charging-retaining coating is placed on the metal forming.The surface conductivity of low charging-retaining coating and metal forming combination is 10^-3-10^-10Siemens is preferably 10^-6Siemens.

All three embodiment provide the electrostatic screen and the low charging-retaining surface of moisture protection, height.

The invention provides a kind of low charging-retaining thin-film material that is used for package, this package protecting component is not subjected to the influence of static discharge and the moisture that causes corroding, and described thin-film material comprises: a) heat seal electrostatic dissipation polymer; B) the first moisture layer, the described first moisture layer has nonmetallic surface, and wherein this nonmetallic surface is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum; C) the second moisture layer, the described second moisture layer has surface, spray metal and nonmetallic surface, wherein this nonmetallic surface is fixed on the surface, spray metal of the described first moisture layer by second articulamentum, and this second moisture layer has the metal surface; And d) low charging-retaining coating is fixed on the metal surface of the described second moisture layer.

The invention provides a kind of low charging-retaining thin-film material that is used for package, this package protecting component is not subjected to the influence of static discharge and the moisture that causes corroding, and described thin-film material comprises: a) heat seal electrostatic dissipation polymer; B) the first polymer moisture layer, this first polymer moisture layer comprises surface, first spray metal and two surfaces of second nonmetallic surface, and the described nonmetallic surface of the described first polymer moisture layer is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum; C) the second polymer moisture layer, this second polymer moisture layer comprises surface, first spray metal and two surfaces of second nonmetallic surface, and second nonmetallic surface of the described second polymer moisture layer is fixed on the surface, described spray metal of the described first polymer moisture layer by second articulamentum; And d) low charging-retaining coating is fixed on the surface, described first spray metal of the described second polymer moisture layer.

The invention provides a kind of low charging-retaining thin-film material that is used for package, this package protecting component is not subjected to the influence of static discharge and corrosion, and described thin-film material comprises: a) heat seal electrostatic dissipation polymer; B) the first moisture layer, it comprises the metal forming that is fixed on the described heat seal electrostatic dissipation polymer, wherein said metal forming is fixed on the described heat seal electrostatic dissipation polymer by one first articulamentum; C) the second moisture layer, this second moisture layer comprises surface, spray metal and nonmetallic surface, the described nonmetallic surface of the described second moisture layer is fixed on the described first moisture layer by one second articulamentum; And d) low charging-retaining coating is fixed on the surface, spray metal of the described second moisture layer.

The invention provides a kind of low charging-retaining thin-film material that is used for package, this package protecting component is not subjected to the influence of static discharge and corrosion, and described thin-film material comprises: a) heat seal electrostatic dissipation polymer; B) insulating polymer, it is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum; C) metal forming is fixed on this insulating polymer to form the first moisture layer; D) the second moisture layer, this second moisture layer comprises surface, spray metal and nonmetallic surface, the described nonmetallic surface of the described second moisture layer is fixed to described metal forming by second articulamentum; E) low charging-retaining coating is fixed on the surface, spray metal of the described second moisture layer.

The invention provides a kind of low charging-retaining thin-film material that is used for package, this package protecting component is not subjected to the influence of static discharge and corrosion, and described thin-film material comprises: a) heat seal electrostatic dissipation polymer; B) first articulamentum is fixed on the described heat seal electrostatic dissipation polymer; C) polymer moisture layer has surface, spray metal and two surfaces of nonmetallic surface, and described nonmetallic surface is fixed on described first articulamentum; D) second articulamentum is fixed on the described polymer moisture layer; E) polymeric layer is fixed to second articulamentum; F) the 3rd articulamentum is fixed to the second polymer layer; G) metal forming is fixed on described the 3rd articulamentum; And h) low charging-retaining coating is fixed on the described metal forming.

Description of drawings

Fig. 1 represents the viewgraph of cross-section of first embodiment of the present invention.

Fig. 2 represents the viewgraph of cross-section of second embodiment of the present invention.

Fig. 3 represents the viewgraph of cross-section of the 3rd embodiment of the present invention.

Fig. 4 is the distortion of first embodiment of the present invention.

The specific embodiment

Need can on film surface, not keep the electrostatic protection moisture film of electric charge on the market always.This desirable film is relatively not too expensive, electrostatic protection is provided, do not keep electric charge and provide the moisture layer that prevents that moisture from entering in order to prevent to corrode.The electrostatic screen thin-film material is used to form bag, coating and other package more.These packages can oneself carry out heat seal usually.Therefore, the desirable film that is used for this purpose can be heat sealed to himself.

The present invention solves these and other relevant issues by utilizing the low charging-retaining surface to provide electrostatic screen and moisture protection to carry out corrosion protection.The present invention uses the bottom of heat seal electrostatic dissipation polymer as this thin-film material.This heat seal electrostatic dissipation polymer will constitute the inner surface of any packaging material of being made by this film.This heat seal electrostatic dissipation polymer can fall the charge discharging that is placed into any electronic component in the packaging material, and prevents to produce when being placed into electronic component in the packaging material triboelectrification.This heat seal dissipation material is fixed on the first moisture layer.This layer also can be polymer separation layer or the metal forming with surface, first spray metal and second nonmetallic surface.The first moisture layer is fixed to the second moisture layer, and this second moisture layer can be polymer separation layer or the metal forming with surface, first spray metal and second nonmetallic surface.The insulating polymer layer separates metal forming or metallic layers.The surface, spray metal of polymer support layer or metal forming be as the moisture layer, and also isolate the material that is placed in the package as the faraday cup electricity, thereby make it can not be subjected to externalities.Spray metal layer or metal forming need the enough thick influence that is not higher than 12000 volts of voltages with protection.These layers can repeat stack to carry out Additional Protection.On the spray metal at top layer or metal forming, cover the low charging-retaining coating.Spray metal layer or metal forming below this protection make it can not produce indentation and scratch, therefore any electric charge that accumulates on the metal foil layer of the outside can be discharged, thereby prevent that the electric charge that keeps from producing electrostatic breakdown to electronic component on the surface of package.With reference to the description that three embodiment are carried out, with the present invention easier to understand.

First embodiment

First embodiment as shown in figs. 1 and 4.In first embodiment, heat sealelectrostatic dissipation polymer 1 forms the bottom of this thin-film material.This heat sealelectrostatic dissipation polymer 1 can be towards the inside of packaging material when using as packaging material, and contact with the electronic component of required protection.This heat sealelectrostatic dissipation polymer 1 can be for any thickness but is preferably the polyethylene of 2.6mm thickness, and its electrical conductivity is 10^-1-10^-10Siemens.This heat sealelectrostatic dissipation polymer 1 can also be polypropylene or polyurethane.Polymer is by electrostatic dissipation material use water imbibition surfactant or be known as ionic compound that antistatic additive uses and carry out locally sprayed or positive displacement loadable polymer and making.They can be from company's commercially produced products such as 3M company, E.I.Du Pont Company or Dow chemical companies.These materials are quarternary ammonium salt compound, tertiary amine or uncle's ammonia normally.

This heat sealelectrostatic dissipation polymer 1 is fixed on the firstpolymer moisture layer 2 by articulamentum 23.First articulamentum 23 is preferably binding agent, and for example the binding agent of polyurethane-base also can be hot-melt polymer, for example polyethylene still.The firstpolymer moisture layer 2 comprises surface,first spray metal 5 and second nonmetallic surface 6.The polymer of the first polymer moisture layer is polyester preferably, but also can be other polymer, for example polypropylene, polyethylene or nylon.Surface,first spray metal 5 orientations can be in the face of heat sealelectrostatic dissipation polymer 1 or back to this heat seal electrostatic dissipation polymer 1.This both direction respectively as shown in figs. 1 and 4.Spray metal on the firstpolymer moisture layer 2 is preferably vapor deposition of aluminum, but also can be other metal, for example copper, nickel, steel, gold or silver-colored.Also can use the sputter coating method and without vapour deposition process.Should spray enough metals to guarantee that per 645.15 square centimeters (100 square inches) vapor permeabilities of 24 hours are less than 0.04 gram.But because the cost of aluminium and treatment characteristic, aluminium is preferably used in the spray metal.If use aluminium, the thickness of aluminium is the 170-400 dust onsurface 5, first spray metal, is preferably 290 dusts.When making package, this firstpolymer moisture layer 2 provides faraday cup can not be subjected to the influence of static discharge to protect the electronic component of placing in it.

The firstpolymer moisture layer 2 is fixed on the secondpolymer moisture layer 3 by second articulamentum 24.Second articulamentum 24 is preferably binding agent, and for example the binding agent of polyurethane-base also can be hot-melt polymer, for example polyethylene still.The secondpolymer moisture layer 3 comprises surface,first spray metal 8 and second nonmetallic surface 7.The structure of the secondpolymer moisture layer 3 is similar to the firstpolymer moisture layer 2 and is made by materials similar.Although the first and second polymer moisture layers can be made from a variety of materials,, for easily making and constructing, two materials in a preferred embodiment are identical.Surface,first spray metal 8 in the secondpolymer moisture layer 3 is orientated back to heat sealelectrostatic dissipation polymer 1, and in the face of becoming the outer surface of any package of making by this thin-film material.In this first preferred embodiment, low charging-retainingcoating 4 is fixed to the surface,first spray metal 8 of the second polymer moisture layer 3.This low charging-retainingcoating 4 is polymer, is preferably to add carbon acrylic acid.Also can use other polymer, for example polyurethane, polyethylene, polypropylene.Other conductive particle can be added in the polymer, as silver, copper, sheet metal, stainless steel fibre, the Zelic of Du Pont or the like.The electrical conductivity of this low charging-retaining coating is preferably 1 * 10^-7Siemens, but also can be 1 * 10^-3With 10^-9Between the Siemens.Not only protection was placed on the influence that electronic component in this material is not subjected to static discharge to the secondpolymer moisture layer 3 as the moisture layer but also as faraday cup.Any electric charge that low charging-retainingcoating 4 allows to accumulate on the material slowly is discharged in the surrounding environment.The low charging-retaining coating also provides physical protection, eyelet or damage occur with the surface,first spray metal 8 that prevents the second polymer moisture layer 3.The combined conductivity on the surface, first spray metal of low charging-retaining coating and polymer moisture layer is preferably 10^-3-10^-10Siemens is preferably 10^-6Siemens.

Second embodiment

In second preferred embodiment, as shown in Figure 2, heat sealelectrostatic dissipation polymer 14 preferably is fixed on the stable dimensionally insulating propertiespolymeric layer 12 by articulamentum 13.Thisarticulamentum 13 is the hot melt polyethylene preferably, but also can be binding agent.The electrical conductivity of this heat sealelectrostatic dissipation polymer 14 is preferably in 10^-7-10^-10Between the Siemens.This polymer is preferably the polyethylene that low charging-retaining is handled; This processing utilizes the water imbibition surfactant or is known as ionic compound that antistatic additive uses to be carried out locally sprayed or positive displacement loads and carries out; These polymer class are similar to polymer cited in first embodiment.Reduce friction by any electric charge redistribution that allows to be produced and to electrify.

Stable dimensionally insulatingpolymer 12 is preferably biaxial oriented nylon, tyvek (Tyvek) or polyester.Thisinsulating polymer 12 is fixed onsecond articulamentum 11, and but thissecond articulamentum 11 is preferably the hot melt polyethylene also can is adhesive layer.Polyethylene, polyurethane acroleic acid polymer also can be used for this articulamentum.First articulamentum 13 is together with anti-influence of piercing through the electric current thatlayer 12 and second articulamentum yet be not subjected to static discharge and produced with electric barrier packaging product inside as insulating barrier.Second articulamentum is fixed to stable dimensionallyinsulating polymer 12 on the metal forming 10.This metal forming 10 is preferably aluminium, but also can be copper, gold, steel, nickel or silver.The thickness of this metal forming 10 is preferably 0.0089mm (0.0035 inch) at 0.0051-0.0127mm (0.0002-0.0005 inch).Metal forming 10 provides electrostatic protection as the first moisture layer to the electronic component that is placed in the package of being made by film of the present invention.

Metal forming 10 usefulness the3rd articulamentum 25 is connected on the polymer moisture layer 31.The3rd articulamentum 25 is preferably binding agent, but also can be hot-melt polymer, for example polyethylene.Thispolymer moisture layer 31 has surface,first spray metal 33 and second nonmetallic surface 32.Second nonmetallic surface 32 of thispolymer moisture layer 31 contacts with the 3rd articulamentum 25.Surface, first spray metal of thispolymer moisture layer 31 33 contacts with low charging-retaining coating 9.Polymer moisture layer 31 has identical structure withpolymer moisture layer 2 and 3 among first embodiment.Low charging-retainingcoating 9 is identical with low charging-retainingcoating 4 structures among first embodiment; And thiscoating 9 has 10 with the surface,first spray metal 33 of polymer moisture layer 31^-3-10^-10Siemens is preferably 10^-6The surface conductivity of Siemens.

The 3rd embodiment

The 3rd embodiment of the present invention as shown in Figure 3.Heat sealelectrostatic dissipation polymer 21 utilizesfirst articulamentum 20 to be fixed on the polymer moisture layer 22.Thispolymer moisture layer 22 has surface,first spray metal 35 and second nonmetallic surface 34.Second articulamentum 20stable polymer 36 dimensionally is fixed on the polymer moisture layer 22.The3rd articulamentum 18stable polymer 36 dimensionally is fixed on the metal forming 19.The structure ofpolymer moisture layer 22 and thepolymer moisture layer 2 and 3 among first embodiment are similar.The structure of articulamentum is similar to other articulamentums of the present invention.The structure of metal forming 19 is similar to second metal forming 10 among the embodiment.Low charging-retainingcoating 15 is placed on the metal forming 19.The electrical conductivity of low charging-retainingcoating 15 is 10^-3-10^-9Siemens is preferably 10^-7Siemens.The structure of this low charging-retainingcoating 15 is similar to the structure of the low charging-retainingcoating 4 among first embodiment.The surface conductivity that metal forming 19 and low charging-retainingcoating 15 have together is 10^-3-10^-7Siemens is preferably 10^-6Siemens.

Although above three embodiment are described, do not depart under the prerequisite of essence of the present invention, other improvement also is possible.The membrane according to the invention material has lower vapor permeability, when testing according to ASTM-F-1249,645.15 square centimeter (100 square inches) vapor permeability of 24 hours is less than 0.02 gram, so this thin-film material meets the MilB-81705 standard.When thin-film material of the present invention is made package, this thin-film material will provide electrostatic screen for the electronic component that is placed in this package, be higher than 12000 volts voltage with opposing.

Should be understood that the present invention can not depart from spirit of the present invention or central feature with other form realization.Example of the present invention and embodiment are exemplary, can not think the restriction to details.

Claims (27)

1. the low charging-retaining thin-film material that is used for package, this package protecting component are not subjected to the influence of static discharge and the moisture that causes corroding, and described thin-film material comprises:

A) heat seal electrostatic dissipation polymer;

B) the first moisture layer, the described first moisture layer has nonmetallic surface and surface, spray metal, and wherein this nonmetallic surface is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum;

C) be fixed in the second moisture layer of the first moisture layer, the described second moisture layer has surface, spray metal and nonmetallic surface, and wherein this nonmetallic surface is fixed on the surface, spray metal of the described first moisture layer by second articulamentum; And

D) low charging-retaining coating is fixed on the metal surface of the described second moisture layer.

2. the low charging-retaining thin-film material that is used for package, this package protecting component are not subjected to the influence of static discharge and the moisture that causes corroding, and described thin-film material comprises:

A) heat seal electrostatic dissipation polymer;

B) the first polymer moisture layer, this first polymer moisture layer comprises surface, spray metal and two surfaces of nonmetallic surface, and the described nonmetallic surface of the described first polymer moisture layer is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum;

C) the second polymer moisture layer, this second polymer moisture layer comprises surface, spray metal and two surfaces of nonmetallic surface, and the nonmetallic surface of the described second polymer moisture layer is fixed on the surface, described spray metal of the described first polymer moisture layer by second articulamentum; And

D) low charging-retaining coating is fixed on the surface, described spray metal of the described second polymer moisture layer.

3. thin-film material according to claim 2, wherein, described first and second articulamentums are binding agents.

4. thin-film material according to claim 2, wherein, the metal on each surface, spray metal of the first polymer moisture layer and the second polymer moisture layer all is an aluminium, the thickness of this aluminium is the 170-400 dust.

5. thin-film material according to claim 2, wherein, the electrical conductivity of described heat seal electrostatic dissipation polymer is 10^-10～10^-1Siemens.

6. thin-film material according to claim 2, wherein, described low charging-retaining coating is for adding carbon polymer, and its electrical conductivity is at least 1 * 10^-9～1 * 10^-3Siemens.

7. thin-film material according to claim 2, wherein, the surface, described spray metal of this first and second polymer moisture layer is the aluminium of vapour deposition.

8. thin-film material according to claim 2, wherein, the surface, described spray metal of this first and second polymer moisture layer is the nickel of vapour deposition.

9. thin-film material according to claim 2, wherein, the surface, described spray metal of this first and second polymer moisture layer is the copper of vapour deposition.

10. thin-film material according to claim 2, wherein, described low charging-retaining coating is the acrylic acid that adds carbon.

11. be used for the low charging-retaining thin-film material of package, this package protecting component is not subjected to the influence of static discharge and corrosion, described thin-film material comprises:

A) heat seal electrostatic dissipation polymer;

B) the first moisture layer, it comprises the metal forming that is fixed on the described heat seal electrostatic dissipation polymer, wherein said metal forming is fixed on the described heat seal electrostatic dissipation polymer by one first articulamentum;

C) the second moisture layer, this second moisture layer comprises surface, spray metal and nonmetallic surface, the described nonmetallic surface of the described second moisture layer is fixed on the described first moisture layer by one second articulamentum; And

D) low charging-retaining coating is fixed on the surface, spray metal of the described second moisture layer.

12. be used for the low charging-retaining thin-film material of package, this package protecting component is not subjected to the influence of static discharge and corrosion, described thin-film material comprises:

A) heat seal electrostatic dissipation polymer;

B) insulating polymer, it is fixed on the described heat seal electrostatic dissipation polymer by first articulamentum;

C) metal forming is fixed on this insulating polymer to form the first moisture layer;

D) the second moisture layer, this second moisture layer comprises surface, spray metal and nonmetallic surface, the described nonmetallic surface of the described second moisture layer is fixed to described metal forming by second articulamentum;

E) low charging-retaining coating is fixed on the surface, spray metal of the described second moisture layer.

13. low charging-retaining coating film material according to claim 12 is characterized in that this insulating polymer is fixed on the metal forming by the 3rd articulamentum.

14. thin-film material according to claim 13, wherein, described first articulamentum, second articulamentum and the 3rd articulamentum are binding agents.

15. thin-film material according to claim 14, wherein, described metal forming is an aluminium foil.

16. thin-film material according to claim 15, its thickness is between the 0.00508-0.0127 millimeter.

17. thin-film material according to claim 13, wherein, this insulating polymer is a biaxial oriented nylon.

18. thin-film material according to claim 17, wherein, the described second moisture layer is the polyethylene of spray metal.

19. thin-film material according to claim 18, wherein, surface, described spray metal is that thickness is the aluminium of 170-400 dust.

20. thin-film material according to claim 14, wherein, the surface conductivity that the surface, spray metal of the described low charging-retaining coating and the second moisture layer has together is 10^-3To 10^-7Siemens.

21. be used for the low charging-retaining thin-film material of package, this package protecting component is not subjected to the influence of static discharge and corrosion, described thin-film material comprises:

A) heat seal electrostatic dissipation polymer;

B) first articulamentum is fixed on the described heat seal electrostatic dissipation polymer;

C) polymer moisture layer has surface, spray metal and two surfaces of nonmetallic surface, and described nonmetallic surface is fixed on described first articulamentum;

D) second articulamentum is fixed on the described polymer moisture layer;

E) polymeric layer is fixed to second articulamentum;

F) the 3rd articulamentum is fixed to the second polymer layer;

G) metal forming is fixed on described the 3rd articulamentum; And

F) low charging-retaining coating is fixed on the described metal forming.

22. thin-film material according to claim 21, wherein, described heat seal electrostatic dissipation polymer is the polyethylene with antistatic agent treatment.

23. thin-film material according to claim 22, wherein, described metal forming is made of aluminium foil; And wherein, the spray on the surface, spray metal of polymer moisture layer is that thickness is the aluminium of 170-400 dust.

24. thin-film material according to claim 23, wherein, per 645.15 square centimeters of moisture permeabilities of 24 hours are less than 0.02 gram.

25. thin-film material according to claim 1, wherein, per 645.15 square centimeters of moisture permeabilities of 24 hours are less than 0.02 gram.

26. thin-film material according to claim 2, wherein, per 645.15 square centimeters of moisture permeabilities of 24 hours are less than 0.02 gram.

27. thin-film material according to claim 12, wherein, per 645.15 square centimeters of moisture permeabilities of 24 hours are less than 0.02 gram.

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