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JPH10321755A - Semiconductor-device packaging structure and its manufacture - Google Patents

Semiconductor-device packaging structure and its manufacture

Info

Publication number
JPH10321755A
JPH10321755AJP9130963AJP13096397AJPH10321755AJP H10321755 AJPH10321755 AJP H10321755AJP 9130963 AJP9130963 AJP 9130963AJP 13096397 AJP13096397 AJP 13096397AJP H10321755 AJPH10321755 AJP H10321755A
Authority
JP
Japan
Prior art keywords
point solder
semiconductor device
melting point
high melting
solder bump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP9130963A
Other languages
Japanese (ja)
Inventor
Masaya Sakurai
雅也 櫻井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co LtdfiledCriticalOki Electric Industry Co Ltd
Priority to JP9130963ApriorityCriticalpatent/JPH10321755A/en
Publication of JPH10321755ApublicationCriticalpatent/JPH10321755A/en
Withdrawnlegal-statusCriticalCurrent

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Classifications

Landscapes

Abstract

PROBLEM TO BE SOLVED: To connected semiconductor device and a substrate more stably by covering the substrate side and the semiconductor-device side of a high melting-point solder bump with low melting-point solder so as to form fillets. SOLUTION: An electrode 2 is formed on a semiconductor device 1, and a protective film 3 is formed on the surface of the semiconductor device 1, including the periphery of the electrode 2. Then, tightly attached metal 4a is provided on the electrode 2, and a solder resist film 5 is formed, so as to cover the periphery of the tightly attached metal 4a. A high melting-point solder bump 6 is formed on the tightly attached metal 4a, and reflow formation is performed on the solder bump 6. The surface of the semiconductor device 1 is etched to remove the solder resist film 5, such that the periphery of the tightly attached metal 4a is not covered with the high melting-point solder bump 6. The semiconductor device 1 is mounted on a pad 8, and plated with a low melting-point solder 9a on a substrate 7. Reflow is performed such that only the low melting-point solder 9a melts, and fillets are formed between the high melting-point solder bump 6 and the pad 8, and at a portion of the periphery of the tightly attached metal 4a which is not covered with the high melting-point solder 6.

Description

Translated fromJapanese
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、半導体装置の実装
構造及びその製造方法に関するものである。
The present invention relates to a semiconductor device mounting structure and a method of manufacturing the same.

【0002】[0002]

【従来の技術】以下、図面を参照しながら従来の技術を
説明する。図3に、従来の、ハンダバンプが形成されて
いる半導体装置の基板への実装方法を示す。1は図示し
ない電子回路が搭載される半導体装置、2は半導体装置
1上に形成され、 前記電子回路から入出力を行う電極
である。3は埃や屑や湿度から半導体装置1上に形成さ
れた前記電子回路を守る保護膜である。4は錫:鉛が9
5:5等の高融点ハンダバンプ6の、ハンダ濡れ性を向
上させる密着金属、7は基板、8は基板7の図示しない
電子回路からの入出力を行うパッド、9は錫:鉛が6
3:37等の低融点ハンダ、10はくびれ部、11は亀
裂である。
2. Description of the Related Art A conventional technique will be described below with reference to the drawings. FIG. 3 shows a conventional method of mounting a semiconductor device having solder bumps formed on a substrate. Reference numeral 1 denotes a semiconductor device on which an electronic circuit (not shown) is mounted. Reference numeral 3 denotes a protective film for protecting the electronic circuit formed on the semiconductor device 1 from dust, dust, and humidity. 4 is tin: 9 lead
Adhesion metal for improving solder wettability of the high melting point solder bump 6 such as 5: 5, 7 is a substrate, 8 is a pad for inputting / outputting from an electronic circuit (not shown) of the substrate 7, 9 is tin: lead 6.
3: Low melting point solder such as 37, 10 is a constricted portion, and 11 is a crack.

【0003】半導体装置1と基板7の初期の状態を図3
(a)に示す。半導体装置1には高融点ハンダバンプ6
が形成されている。又、基板7のパッド8には低融点ハ
ンダ9がメッキされている。半導体装置1を基板7に実
装する方法は、図3(b)に示すように、低融点ハンダ
9のみを溶融させ、高融点ハンダバンプ6と接続させて
いた。このため、高融点ハンダバンプ6の形状はそのま
ま残り、低融点ハンダ9が高融点ハンダバンプ6とパッ
ド8を接合する状態だった。
FIG. 3 shows an initial state of the semiconductor device 1 and the substrate 7.
(A). The semiconductor device 1 has a high melting point solder bump 6
Are formed. The pads 8 of the substrate 7 are plated with low-melting solder 9. In the method of mounting the semiconductor device 1 on the substrate 7, as shown in FIG. 3B, only the low melting point solder 9 is melted and connected to the high melting point solder bump 6. Therefore, the shape of the high melting point solder bump 6 remains as it is, and the low melting point solder 9 joins the high melting point solder bump 6 and the pad 8.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、従来の
方法では、以下の課題がある。高融点ハンダバンプ6の
基板7側は低融点ハンダ9があるのでフィレット形状を
している。高融点ハンダバンプ6の半導体装置側はくび
れ部10となっている。この状態は図3(b)に示す通
りである。この状態で熱衝撃に晒された場合に、くびれ
部10付近に熱応力が集中しやすくなる。この場合、く
びれ部10に歪みが発生し、亀裂11が発生しやすくな
り、高融点ハンダバンプ6と電極2の接続が不良になっ
てしまうことがある。この状態を図3(c)に示す。従
って、本発明は半導体装置1と基板7の接続をより安定
にすることを目的とする。
However, the conventional method has the following problems. The high melting point solder bump 6 has a fillet shape on the substrate 7 side due to the presence of the low melting point solder 9. A narrow portion 10 is formed on the semiconductor device side of the high melting point solder bump 6. This state is as shown in FIG. When exposed to thermal shock in this state, thermal stress tends to concentrate near the constricted portion 10. In this case, distortion occurs in the constricted portion 10, cracks 11 are easily generated, and the connection between the high melting point solder bump 6 and the electrode 2 may be poor. This state is shown in FIG. Therefore, an object of the present invention is to make the connection between the semiconductor device 1 and the substrate 7 more stable.

【0005】[0005]

【課題を解決するための手段】半導体装置は、電極と、
電極の外周部を含む面に形成した保護膜と、電極の上に
形成した密着金属と、密着金属の外周部を除いた部分に
形成した高融点ハンダバンプを有する。そして、基板の
パッド上の低融点ハンダを溶融して、半導体装置を基板
のパッドに実装する。
A semiconductor device comprises: an electrode;
It has a protective film formed on the surface including the outer peripheral portion of the electrode, an adhesive metal formed on the electrode, and a high melting point solder bump formed on a portion excluding the outer peripheral portion of the adhesive metal. Then, the low melting point solder on the pads of the substrate is melted, and the semiconductor device is mounted on the pads of the substrate.

【0006】[0006]

【発明の実施の形態】以下、図面を参照しながら本発明
の一実施の形態について説明する。図1は、本発明の一
実施の形態の断面図である。図2は本発明の一実施の形
態の製造方法を示す図である。従来の技術と同等なもの
については同一符号を付ける。4aは、図3で示した従
来の密着金属4より高融点ハンダバンプ6の外側まで形
成された密着金属である。9aは、図3で示した従来の
低融点ハンダ9より若干量を増やした低融点ハンダであ
る。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of one embodiment of the present invention. FIG. 2 is a diagram illustrating a manufacturing method according to an embodiment of the present invention. The same reference numerals are given to those equivalent to the conventional technology. Reference numeral 4a denotes an adhesion metal formed from the conventional adhesion metal 4 shown in FIG. Reference numeral 9a denotes a low melting point solder having a slightly larger amount than the conventional low melting point solder 9 shown in FIG.

【0007】以下、本発明の一実施の形態の製造方法に
ついて図2を参照しながら説明する。図2(a)に示す
ように、半導体装置1上に図示しない電子回路からの入
出力を行う電極2を形成する。2番目に、電極2の外周
部を含む半導体装置1の面に保護膜3を形成する。
Hereinafter, a manufacturing method according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 2A, an electrode 2 for performing input and output from an electronic circuit (not shown) is formed on a semiconductor device 1. Second, the protective film 3 is formed on the surface of the semiconductor device 1 including the outer periphery of the electrode 2.

【0008】3番目に図2(b)に示すように、電極2
の上に密着金属4aを設ける。4番目に図2(c)に示
すように、密着金属4aの外周部を覆うようにハンダレ
ジスト膜5を形成する。ハンダレジスト膜5は、例えば
ポリイミド膜のような耐熱性とハンダレジスト性を有す
る。5番目に図2(d)に示すように、密着金属4a上
に高融点ハンダバンプ6をメッキ等により形成し、リフ
ローし、整形する。
[0008] Third, as shown in FIG.
The contact metal 4a is provided on the substrate. Fourth, as shown in FIG. 2C, a solder resist film 5 is formed so as to cover the outer peripheral portion of the adhesion metal 4a. The solder resist film 5 has heat resistance and solder resist properties, such as a polyimide film. Fifth, as shown in FIG. 2D, a high melting point solder bump 6 is formed on the contact metal 4a by plating or the like, reflowed, and shaped.

【0009】6番目に図2(e)に示すように、半導体
装置1の表面をエッチングしてハンダレジスト膜5を除
去する。この時、密着金属4aの外周部は、高融点ハン
ダバンプ6にて覆われていない状態となる。7番目に図
2(f)に示すように、基板7の低融点ハンダ9aがメ
ッキされているパッド8に、半導体装置1を搭載する。
Sixth, as shown in FIG. 2E, the surface of the semiconductor device 1 is etched to remove the solder resist film 5. At this time, the outer peripheral portion of the contact metal 4a is not covered with the high melting point solder bump 6. Seventh, as shown in FIG. 2F, the semiconductor device 1 is mounted on the pad 8 of the substrate 7 on which the low melting point solder 9a is plated.

【0010】そして、低融点ハンダ9aのみが溶融する
ようにリフローを行う。この結果、図1に示すように、
低融点ハンダ9aは、高融点ハンダバンプ6とパッド8
の間にフィレットを形成する。更に、低融点ハンダ9a
は、密着金属4aの外周部の高融点ハンダバンプ6にて
覆われていない箇所にフィレットを形成する。密着金属
4aと低融点ハンダ9aがフィレットを形成する理由
は、密着金属4aのハンダ濡れ性と、低融点ハンダ9a
の表面張力にある。
Then, reflow is performed so that only the low melting point solder 9a is melted. As a result, as shown in FIG.
The low melting point solder 9a is composed of the high melting point solder bump 6 and the pad 8
A fillet is formed between them. Furthermore, low melting point solder 9a
Forms a fillet in a portion of the outer peripheral portion of the contact metal 4a which is not covered with the high melting point solder bump 6. The reason why the adhesion metal 4a and the low melting point solder 9a form a fillet is that the solder wettability of the adhesion metal 4a and the low melting point solder 9a.
Surface tension.

【0011】フィレットは高融点ハンダバンプ6にかか
る熱応力の集中の回避及び緩和を図れる。「半導体パッ
ケージング工学」日経BP社 大塚寛冶 宇佐美保 共著
259頁 6行目〜7行目に「図14.6のAの部分は
Au−Siの濡れ上がり( ミニスカス)があり、この
濡れ上がり面積全体で端部の応力に耐えるため、応力集
中の緩和が図れる。」とある。ミニスカスは、本発明の
フィレットと同じで、フィレットが高融点ハンダバンプ
6にかかる熱応力を緩和することが理解できる。応力は
熱応力に限らず機械的な衝撃力も考えられる。
The fillet can avoid and reduce the concentration of the thermal stress applied to the high melting point solder bump 6. "Semiconductor Packaging Engineering," Nikkei BP, Hiroshi Otsuka and Miho Usami
On page 259, lines 6-7, "A in FIG. 14.6 has Au-Si wetting (mini-scath), and the entire wetting area withstands the stress at the end, thus alleviating the stress concentration. Can be achieved. " It can be understood that the mini skirt is the same as the fillet of the present invention, and the fillet reduces the thermal stress applied to the high melting point solder bump 6. The stress is not limited to the thermal stress, but may be a mechanical impact force.

【0012】以上のように、高融点ハンダバンプの周囲
は低融点ハンダにて覆われるため、応力が半導体装置側
の付け根部に集中することがなくなり、亀裂が生じるこ
となく長寿命化が期待できる。
As described above, since the periphery of the high-melting-point solder bump is covered with the low-melting-point solder, the stress does not concentrate on the base of the semiconductor device side, and a longer life can be expected without cracking.

【0013】[0013]

【発明の効果】高融点ハンダバンプの基板側及び半導体
装置側は低融点ハンダによりフィレット形状をしている
ので、半導体装置と基板の接続をより安定にすることが
できる。
Since the substrate side and the semiconductor device side of the high melting point solder bump are formed in a fillet shape by the low melting point solder, the connection between the semiconductor device and the substrate can be further stabilized.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施の形態を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図2】本発明の一実施の形態の製造方法を示す断面図
である。
FIG. 2 is a cross-sectional view illustrating a manufacturing method according to an embodiment of the present invention.

【図3】従来の半導体装置の基板への実装方法を示す断
面図である。
FIG. 3 is a cross-sectional view showing a conventional method for mounting a semiconductor device on a substrate.

【符号の説明】[Explanation of symbols]

1…半導体装置 2…電極 3…保護膜 4a…密着金属 6…高融点ハンダバンプ 7…基板 8…パッド 9a…低融点ハンダ DESCRIPTION OF SYMBOLS 1 ... Semiconductor device 2 ... Electrode 3 ... Protective film 4a ... Adhesion metal 6 ... High melting point solder bump 7 ... Substrate 8 ... Pad 9a ... Low melting point solder

Claims (2)

Translated fromJapanese
【特許請求の範囲】[Claims]【請求項1】 低融点ハンダが予め形成されている基板
のパッドへの高融点ハンダバンプにて形成される端子部
を有する半導体装置の実装構造において、 前記半導体装置は、 電極と、 前記電極の外周部を含む面に形成した保護膜と、 前記電極の上に形成した密着金属と、 前記密着金属の外周部を除いた部分に形成した前記高融
点ハンダバンプを有し、 前記基板の前記パッドに、前記低融点ハンダを溶融して
前記端子部が実装されることを特徴とする半導体装置の
実装構造。
1. A mounting structure of a semiconductor device having a terminal portion formed by a high melting point solder bump on a pad of a substrate on which a low melting point solder is formed in advance, wherein the semiconductor device comprises: an electrode; A protective film formed on a surface including the portion, an adhesion metal formed on the electrode, and the high melting point solder bump formed on a portion excluding an outer peripheral portion of the adhesion metal; The mounting structure of a semiconductor device, wherein the terminal portion is mounted by melting the low melting point solder.
【請求項2】 半導体装置の端子部に高融点ハンダバン
プを形成する製造方法において、 前記半導体装置上に電極を形成するステップと、 前記電極の外周部を含む前記半導体の面に保護膜を形成
するステップと、 前記電極の上に密着金属を形成するステップと、 前記密着金属の外周部を覆うようにハンダレジスト膜を
形成するステップと、 露出した前記密着金属に前記高融点ハンダバンプを形成
するステップと、 エッチングによりハンダレジスト膜を除去するステップ
と、 リフローにより前記高融点ハンダバンプを整形するステ
ップと、 を有することを特徴とする半導体装置の製造方法。
2. A method for forming a high melting point solder bump on a terminal of a semiconductor device, comprising: forming an electrode on the semiconductor device; and forming a protective film on a surface of the semiconductor including an outer peripheral portion of the electrode. Forming a close contact metal on the electrode; forming a solder resist film so as to cover an outer peripheral portion of the close contact metal; and forming the high melting point solder bump on the exposed close contact metal. A method of manufacturing a semiconductor device, comprising: removing a solder resist film by etching; and shaping the high melting point solder bump by reflow.
JP9130963A1997-05-211997-05-21Semiconductor-device packaging structure and its manufactureWithdrawnJPH10321755A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP9130963AJPH10321755A (en)1997-05-211997-05-21Semiconductor-device packaging structure and its manufacture

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP9130963AJPH10321755A (en)1997-05-211997-05-21Semiconductor-device packaging structure and its manufacture

Publications (1)

Publication NumberPublication Date
JPH10321755Atrue JPH10321755A (en)1998-12-04

Family

ID=15046727

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP9130963AWithdrawnJPH10321755A (en)1997-05-211997-05-21Semiconductor-device packaging structure and its manufacture

Country Status (1)

CountryLink
JP (1)JPH10321755A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US7214561B2 (en)2003-06-162007-05-08Kabushiki Kaisha ToshibaPackaging assembly and method of assembling the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US7214561B2 (en)2003-06-162007-05-08Kabushiki Kaisha ToshibaPackaging assembly and method of assembling the same

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Legal Events

DateCodeTitleDescription
A300Withdrawal of application because of no request for examination

Free format text:JAPANESE INTERMEDIATE CODE: A300

Effective date:20040803


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