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JPH05326601A - ワイヤボンディング方法 - Google Patents

ワイヤボンディング方法

Info

Publication number
JPH05326601A
JPH05326601A JP4151491A JP15149192A JPH05326601A JP H05326601 A JPH05326601 A JP H05326601A JP 4151491 A JP4151491 A JP 4151491A JP 15149192 A JP15149192 A JP 15149192A JP H05326601 A JPH05326601 A JP H05326601A
Authority
JP
Japan
Prior art keywords
bonding
wire
bare chip
electrode
bonding method
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.)
Pending
Application number
JP4151491A
Other languages
English (en)
Inventor
Masanobu Hayashi
正信 林
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP4151491A priority Critical patent/JPH05326601A/ja
Publication of JPH05326601A publication Critical patent/JPH05326601A/ja
Pending legal-status Critical Current

Links

Classifications

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    • H01L24/02—Bonding areas ; Manufacturing methods related thereto
    • H01L24/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L24/06—Structure, shape, material or disposition of the bonding areas prior to the connecting process of a plurality of bonding areas
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    • H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/04042—Bonding areas specifically adapted for wire connectors, e.g. wirebond pads
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  • Power Engineering (AREA)
  • Wire Bonding (AREA)

Abstract

(57)【要約】 【目的】ベアチップの信頼性を低下させることのないワ
イヤボンディング方法を提供する。 【構成】回路基板５上にベアチップ６を搭載し、そのベ
アチップ６面上の電極パッド７にワイヤボンディングす
るためのワイヤボンデング方法であって、あらかじめベ
アチップ６面上の電極パッド７上にバンプ９を形成して
おき、そのバンプ９上にウェッジボンディングをするこ
とを特徴とする。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、混成集積回路装置等の
電子部品におけるワイヤボンディング方法に関する。
【０００２】
【従来の技術】従来のワイヤボンディングは、例えば、
以下に述べる方法で行われていた。まず、図１０（ａ）
に示すように、キャピラリ２１の孔内に挿通されたワイ
ヤ２２とトーチ電極２３との間に高電圧をかけて、ワイ
ヤ２２の先端にボール２４を形成する。次いで、図１
（ｂ）に示すようにトーチ電極２３を退けて、キャピラ
リ２１を下方へ移動させることにより、回路基板２５面
上に形成されたリード電極２７に、ボール２４を接触さ
せてボンディングする。このようなボンディング方法を
ボールボンディングと呼んでいる。次いで、回路基板２
５面上に搭載された半導体ＩＣ等のベアチップ２６面上
のパッド電極２８に、ボンディングワイヤ２２の途中の
部分を押付けることによりウェッジ状ボンドを形成させ
てボンディングする。このようなボンディング方法をウ
ェッジボンディングと呼んでいる。次いで、キャピラリ
２１内のワイヤ２２をキャピラリー２１の動作と連動す
るようにした状態でキャピラリー２１を引き上げてワイ
ヤ２２を切断する。これにより、図１１に示すような電
子部品２９が得られる。この図において、（ａ）は電子
部品２９の側面図、（ｂ）はその平面図である。
【０００３】このように、上記のように、ファーストボ
ンディングにボールボンディングが、セカンドボンディ
ングにウェッジボンディングが、一般的に用いられてい
る。このようにファーストボンディングにボールボンデ
ィングが用いられるのは、ファーストボンディング後の
ワイヤの引き回し方向を自由に選定できるようにするた
めである。つまり、仮に、ファーストボンディングにウ
ェッジボンディングを用いた場合は、その後のワイヤは
一方向にしか引き回しができず、他の方向へ引き回した
場合はウェッジボンディング付近のワイヤに無理な力を
加えることになるためである。
【０００４】
【発明が解決しようとする課題】しかしながら、上記の
方法では、ベアチップ２６面上にウェッジボンディング
することになるため、キャピラリ２１のボンディング面
がベアチップ２６面に直接当たり、ベアチップ２６にク
ラック等を生じさせることになる。また、キャピラリ２
１のボンディング面の直径は、一般には、パッド電極２
８の径よりも大きいため、キャピラリ２１のボンデング
面はパッド電極２８からはみ出す。その結果、キャピラ
リ２１がパッド電極２８に近接する電極ライン（図示せ
ず。）を切断することになる。このように、上記の方法
では、ベアチップ２６の信頼性を低下させるという不都
合があった。
【０００５】本発明は、上記問題点に鑑みてなされたも
のであって、ベアチップの信頼性を低下させることのな
いワイヤボンディング方法を提供することを目的にして
いる。
【０００６】
【課題を解決するための手段】本発明のワイヤボンディ
ング方法は、上記目的を達成するために、あらかじめベ
アチップ面上の電極パッド上にバンプを形成しておき、
そのバンプ上にウェッジボンディングをすることを特徴
とする。
【０００７】
【作用】上記のように、あらかじめベアチップ面上の電
極パッド上にバンプを形成しているため、このバンプ上
にウェッジボンディングをしたとしても、このバンプの
厚みによって、キャピラリのボンディング面がベアチッ
プ面に直接当たることがない。そのため、ベアチップに
クラック等が入ったり、電極パッドに近接する電極ライ
ンを切断することがない。したがって、ベアチップの信
頼性が低下することがない。
【０００８】
【実施例】以下、本発明の一実施例のワイヤボンディン
グ方法を図面を参照しつつ詳述する。まず、図１に示す
ように、キャピラリ１の孔内に挿通されたワイヤ２とト
ーチ電極３との間に高電圧をかけて、金製のワイヤ２の
先端にボール４を形成する。次いで、図２に示すよう
に、トーチ電極３を退けて、キャピラリ１を下方へ移動
させることにより、回路基板５面上に搭載された半導体
ＩＣ等のベアチップ６面上のパッド電極７に、ボール４
を接触させてボンディングする。次いで、図３に示すよ
うに、クランパー８を閉じてワイヤ２を固定させた状態
でキャピラリ１を引き上げる。これによって、パッド電
極７上にバンプ（突起物）９を形成する。次いで、図１
に示すような方法でワイヤ２の先端にボール４を形成し
た状態で、図４に示すような回路基板５面上に形成され
たリード電極１０にボールボンディングを行う。次い
で、図５に示すようにバンプ９上にウェッジボンディン
グを行う。このようにして、図６に示すような電子部品
１１が製造される。なお、この電子部品１１は、ベアチ
ップ６面上のすべてのパッド電極７上にバンプ９を形成
してウェッジボンディングを行ったものである。
【０００９】図７は、本発明の他の実施例によって製造
された電子部品の平面図である。この図に示すように、
パッド電極７上にバンプ９を形成してウェッジボンディ
ングを施したものと併用して、パッド電極７にボールボ
ンディングを施したものを用いることも可能である。こ
の図において、１２ａはバンプ９上に施したウエッジボ
ンディング部分、１２ｂはリード電極１０上に施したウ
ェッジボンディング部分、１３ａはパッド電極７上に施
したボールボンディング部分、１３ｂはリード電極１０
上に施したボールボンディング部分である。このよう
に、パッド電極７にウェッジボンディング、ボールボン
ディングをそれぞれ採用することにより、ワイヤ２を立
体的に交差等すれば配線の自由度を増やすことができ
る。
【００１０】図８および図９は本発明の他の実施例によ
って製造された電子部品の側面図である。これらの図に
おいて、図８はベアチップ６内のパッド電極７同士をワ
イヤボンディングしたもので、図９は２つのべアチップ
６同士のパット電極７をワイヤボンディングしたもので
ある。これらの図において、１２ａはバンプ９上に施し
たウェッジボンディング部分、１３ａはパッド電極７上
に施したボールボンディング部分である。これらの図に
示す電子部品のワイヤボンディング方法に関しては、図
６に示す電子部品１１と同様に、あらかじめバンプ９を
形成し、ボールボンディングを行った後に、バンプ９上
にウェッジボンディングを行う。これらの図に示すよう
に、ベアチップ６上のパッド電極７同士をワイヤボンデ
ィングしているため、配線の自由度を増すことができ
る。
【００１１】なお、本発明に係る実施例において、バン
プ９の形成方法は上記のものに限らず、他の方法であっ
てもよい。また、ワイヤ２の材質は金に限らず、銅、ア
ルミ等の他の材質であってもよい。
【００１２】
【発明の効果】本発明のワイヤボンディング方法は、あ
らかじめベアチップ面上の電極パッド上にバンプを形成
しておき、そのバンプ上にウェッジボンディングをする
ため、ベアチップにクラック等が入ったり、電極パッド
に近接する電極ラインを切断することがなく、ベアチッ
プの信頼性が低下することがない等の効果を奏するもの
である。
【図面の簡単な説明】
【図１】本発明の一実施例のワイヤボンディング方法を
説明するための図である。
【図２】本発明の一実施例のワイヤボンディング方法を
説明するための図である。
【図３】本発明の一実施例のワイヤボンディング方法を
説明するための図である。
【図４】本発明の一実施例のワイヤボンディング方法を
説明するための図である。
【図５】本発明の一実施例のワイヤボンディング方法を
説明するための図である。
【図６】本発明の一実施例のワイヤボンディング方法に
よって製造された電子部品の側面図である。
【図７】本発明の他の実施例のワイヤボンディング方法
によって製造された電子部品の平面図である。
【図８】本発明の他の実施例のワイヤボンディング方法
によって製造された電子部品の側面図である。
【図９】本発明の他の実施例のワイヤボンディング方法
によって製造された電子部品の側面図である。
【図１０】従来のワイヤボンディング方法を説明するた
めの図である。
【図１１】従来のワイヤボンディング方法によって製造
された電子部品を示す図である。
【符号の説明】
１ キャピラリ ２ ワイヤ ３ トーチ電極 ４ ボ−ル ５ 回路基板 ６ ベアチップ ７ パッド電極 ８ クランパー ９ バンプ １０ リード電極 １１ 電子部品 １２ａ ウェッジボンディング部分 １２ｂ ウェッジボンディング部分 １３ａ ボールボンディング部分 １３ｂ ボールボンディング部分

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】回路基板上にベアチップを搭載し、そのベ
    アチップ面上の電極パッドにワイヤボンディングするた
    めのワイヤボンディング方法であって、 あらかじめベアチップ面上の電極パッド上にバンプを形
    成しておき、そのバンプ上にウェッジボンディングをす
    ることを特徴とするワイヤボンディング方法。
JP4151491A 1992-05-18 1992-05-18 ワイヤボンディング方法 Pending JPH05326601A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4151491A JPH05326601A (ja) 1992-05-18 1992-05-18 ワイヤボンディング方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4151491A JPH05326601A (ja) 1992-05-18 1992-05-18 ワイヤボンディング方法

Publications (1)

Publication Number Publication Date
JPH05326601A true JPH05326601A (ja) 1993-12-10

Family

ID=15519661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4151491A Pending JPH05326601A (ja) 1992-05-18 1992-05-18 ワイヤボンディング方法

Country Status (1)

Country Link
JP (1) JPH05326601A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032167A1 (fr) * 1997-01-17 1998-07-23 The Furukawa Electric Co., Ltd. Procede de formation d'une electrode saillante et procede de soudage des connexions d'un element a semi-conducteur
EP1374298A1 (en) * 2001-03-23 2004-01-02 Koninklijke Philips Electronics N.V. Chip module with bond-wire connections with small loop height
US6946380B2 (en) 2002-02-19 2005-09-20 Seiko Epson Corporation Method for forming bump, semiconductor element having bumps and method of manufacturing the same, semiconductor device and method of manufacturing the same, circuit board, and electronic equipment
JP2014120702A (ja) * 2012-12-19 2014-06-30 Azbil Corp ワイヤボンディング方法
JP2014225643A (ja) * 2013-04-16 2014-12-04 ローム株式会社 半導体装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032167A1 (fr) * 1997-01-17 1998-07-23 The Furukawa Electric Co., Ltd. Procede de formation d'une electrode saillante et procede de soudage des connexions d'un element a semi-conducteur
EP1374298A1 (en) * 2001-03-23 2004-01-02 Koninklijke Philips Electronics N.V. Chip module with bond-wire connections with small loop height
US6946380B2 (en) 2002-02-19 2005-09-20 Seiko Epson Corporation Method for forming bump, semiconductor element having bumps and method of manufacturing the same, semiconductor device and method of manufacturing the same, circuit board, and electronic equipment
US7176570B2 (en) 2002-02-19 2007-02-13 Seiko Epson Corporation Method for forming bump, semiconductor element having bumps and method of manufacturing the same, semiconductor device and method of manufacturing the same, circuit board, and electronic equipment
JP2014120702A (ja) * 2012-12-19 2014-06-30 Azbil Corp ワイヤボンディング方法
JP2014225643A (ja) * 2013-04-16 2014-12-04 ローム株式会社 半導体装置
US9859182B2 (en) 2013-04-16 2018-01-02 Rohm Co., Ltd. Semiconductor device
US10312171B2 (en) 2013-04-16 2019-06-04 Rohm Co., Ltd. Semiconductor device

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