JP3210456B2 - 金属ワイヤにおけるボールの形成方法 - Google Patents
金属ワイヤにおけるボールの形成方法Info
- Publication number
- JP3210456B2 JP3210456B2 JP34582492A JP34582492A JP3210456B2 JP 3210456 B2 JP3210456 B2 JP 3210456B2 JP 34582492 A JP34582492 A JP 34582492A JP 34582492 A JP34582492 A JP 34582492A JP 3210456 B2 JP3210456 B2 JP 3210456B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- wire
- tip
- metal wire
- bonding
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/11—Manufacturing methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/11—Manufacturing methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/11—Manufacturing methods
- H01L2224/113—Manufacturing methods by local deposition of the material of the bump connector
- H01L2224/1133—Manufacturing methods by local deposition of the material of the bump connector in solid form
- H01L2224/1134—Stud bumping, i.e. using a wire-bonding apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
- H01L2224/13001—Core members of the bump connector
- H01L2224/13099—Material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/4501—Shape
- H01L2224/45012—Cross-sectional shape
- H01L2224/45015—Cross-sectional shape being circular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45101—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of less than 400°C
- H01L2224/45111—Tin (Sn) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45101—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of less than 400°C
- H01L2224/45116—Lead (Pb) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45117—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 400°C and less than 950°C
- H01L2224/45124—Aluminium (Al) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45139—Silver (Ag) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45147—Copper (Cu) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies and for methods related thereto
- H01L2224/78—Apparatus for connecting with wire connectors
- H01L2224/7825—Means for applying energy, e.g. heating means
- H01L2224/783—Means for applying energy, e.g. heating means by means of pressure
- H01L2224/78301—Capillary
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/85009—Pre-treatment of the connector or the bonding area
- H01L2224/8503—Reshaping, e.g. forming the ball or the wedge of the wire connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01004—Beryllium [Be]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01013—Aluminum [Al]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01029—Copper [Cu]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01033—Arsenic [As]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01047—Silver [Ag]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/0105—Tin [Sn]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01074—Tungsten [W]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01079—Gold [Au]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01082—Lead [Pb]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/013—Alloys
- H01L2924/014—Solder alloys
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Wire Bonding (AREA)
Description
半導体素子のチップ電極と基板上の外部リードとを接続
するワイヤボンディング法、或いは前記チップ電極又は
外部リード上にバンプ電極を形成するワイヤレスボンデ
ィング法におけるボールの形成方法に関する。
Sn,Al,Cu等の金属元素からなるワイヤの先端を
溶融してボールを形成し、このボールをチップ電極に圧
着した後にワイヤを引張ってボールを切断してバンプ電
極を形成するバンプ接続法や、前記ボールをチップ電極
に圧着したワイヤをループ状に外部リードまで導いて圧
着させた後に切断するワイヤボンディング法が知られて
いる。
4に示すように、ワイヤボンダの先端キャピラリ100 に
垂下せしめた金属ワイヤ200 先端をアーク放電等で加
熱,溶融せしめてボール300 を作製することも周知であ
る。
ル形成方法によれば、Au以外の金属元素からなるワイ
ヤ200 を用いた場合、その金属元素が酸化し易いことか
らボール300 を真球状に作製することが難しく、Cuワ
イヤにおいては還元ガスを用いた不活性雰囲気中でボー
ル形成することで対処しているものの、その他Pb-Sn ワ
イヤ等では還元ガスを用いても真球度を向上させること
が困難であった。
による熱がボンダ先端から突出するワイヤ部分全域に伝
わることから、その熱によって組織が粗大化する領域40
0 が長くなる結果、バンプ形成時にはネック切れ高さ50
0 が高くなり、フリップチップ実装を行った際にそのネ
ックが隣接するバンプに触れて短絡不良などを起こす要
因となる。またボンディング時にはループ高さが高くな
って、近年におけるLSIパッケージの小型,薄型化に
伴う低ループの要求を満足できない不具合が生じてい
た。
れたものであり、その目的とするところは、Pb-Sn 等の
酸化し易い金属元素からなるワイヤを用いても真球度の
高いボールを作製できると共に、ボール作製時の熱がワ
イヤの長さ方向に伝わらないようにしてバンプ形成時に
おけるネック切れ高さを短くし得、且つボンディング時
における低ループ化をなし得るボール形成方法を提供す
ることにある。
めに本発明の形成方法は、ワイヤボンダにおけるワイヤ
挿通路の先端導出口から突出する金属ワイヤ先端を還元
ガス雰囲気中にて加熱してボールを作製するボール形成
方法であって、前記導出口内面に形成した略半球形状の
凹部内にてワイヤ先端を加熱して溶融ボールを形成し、
且つその溶融ボールの表面上半部を前記凹部内面に当接
させてボールを作製することを特徴とする。
されたワイヤ先端は凹部内にて溶融しボール形状となる
が、その際このボールは表面上半部を凹部内面に当接
し、且つ表面下半部には前記当接による表面張力が作用
することから、真球度の高いきれいなボールがワイヤの
軸線と同芯状に作製される。
方向へ伝わる以前にボンダに伝達させて吸収することで
ボール直上部分のワイヤ組織の粗大化領域を短くでき、
バンプ形成時にはネック切れ高さが低くなり、ボンディ
ング時にはループ高さが低くなる。
例を図面を参照して説明する。本発明で使用する金属ワ
イヤaは例えばAu,Ag,Pb-Sn ,Sn,Al,Cu
等の中の何れか一つを単独で、若しくは何れか一つを主
要元素として所望な添加元素を配合せしめ、これを線径
30μmm程度の細線状に作製したものである。
例えば図2に示すようなワイヤテンションW1,ワイヤク
ランパW2,トランスデューサW3,キャピラリ(又はツー
ル)W4等を備えた周知な構成において、そのワイヤ挿通
路W5の先端、即ち、キャピラリW4先端に開口するワイヤ
導出口W6の内面に、図1に示す如く略半球形状の凹部W7
を形成してなる。
ール形成時の熱吸収作用を向上させるために、トランデ
ューサW3又はキャピラリW4用の水冷若しくは空冷冷却手
段を設け、さらにキャピラリW4をタングステンカーバイ
ド等の熱伝導のよい材質で形成する。
路W5に挿通せしめてその先端a1を導出口W6から突出せし
め、且つその先端a1を還元ガス雰囲気中で、その先端a1
付近に設けた電極Yと金属ワイヤaとの間でのアーク放
電により加熱してボールa2を形成する。
ガスなどを用いる。また本実施例におけるアーク放電の
放電時間は0.0005〜0.01秒とする。
ら若干突出せしめた状態でアーク放電を行って加熱すれ
ば(図1-(a))、その先端a1は凹部W7内にて溶融しボー
ル形状となるが、その際このボールa2は表面上半部を凹
部W7内面に当接し、且つ表面下半部には前記当接による
表面張力が作用することから、真球度が高くしわのない
きれいなボールa2がワイヤaの軸線と同芯状に作製され
る(図1-(b))。
方向へ伝わる以前にキャピラリW4に伝達して吸収され
る。よって、ボール形成時の熱により組織が粗大化する
領域a3が短くなる。
て、半導体素子のチップ電極と基板上の外部リードとを
接続する。
に示すように、上記ボールa2を半導体素子のチップ電極
(又は基板の外部リード)X上に供給してバンプ電極Z
を形成する。即ち、キャピラリW4を下降させて金属ワイ
ヤa先端に形成されたボールa2をチップ電極上のパッド
部に接合させ、その状態でキャピラリW4を引き上げるこ
とにより、ボールa2の根本部で金属ワイヤaから切断さ
れてバンプ電極Zが形成される。
金属ワイヤaでは急冷凝固法により作製することで格子
欠陥の導入,結晶粒の微細化,非平衡相の生成,元素相
互間の強制固溶などが生じ、この金属ワイヤaによりボ
ールa2を加熱形成した際に、ボール根本部において前記
非平衡相の消失,元素相互間の強制固溶の解放,格子欠
陥の解放,結晶粒の粗大化などが生じ、その部分(ボー
ル根本部)の引っ張り強度が減少し、キャピラリW4によ
りワイヤaを引き上げるだけでボールa2がその根本部で
降伏,破断することによって起こる。また、Pb-Sn ,S
n系以外のワイヤについても、特開平4-12543 号公報に
開示される添加元素の種別及びその含有率の範囲によっ
て、前記同様のボール切断作用が得られる。
(又はチップ電極)に直接接着させることにより、フィ
リップチップボンディング型の半導体装置が形成され
る。また、上記バンプ電極ZをTABテープのリードに
接続すれば、テープキャリアボンディング型の半導体装
置が形成される。
域a3を短くしたことからボールa2を切断した際のネック
高さa4が従来に比して極めて短くなると共に、真球度の
高いきれいなボールa2によりバンプ電極Zが形成される
ことから、接合強度が高く且つ導通不良などを引き起こ
す虞れのないバンプ接続がなされ、信頼性の高い半導体
装置の提供が可能になる。
ないが、上記のように作製されたボールa2をチップ電極
に圧着して接着せしめた後にループ状に外部リードまで
導いて該外部リードに圧着,切断することにより、チッ
プ電極と外部リードを接続させて半導体装置を形成す
る。
の粗大化領域a3を短くしたことから、ボールa2をチップ
電極に接着せしめた後のループ形成においてそのループ
高さが低くなると共に、真球度の高いきれいなボールa2
により接合強度が高く且つ導通不良などを引き起こす虞
れのない接続がなされ、信頼性が高く、しかもLSIパ
ッケージの小型,薄型化等の要求を満足し得る半導体装
置の提供が可能になる。
イヤaは、急冷凝固法以外の周知な製法により作製した
もの、または、急冷凝固法により作製する特開平2-2162
8 号公報に開示される合金ワイヤ等を使用することがで
きる。
したように構成したので、Au以外の酸化し易い金属元
素からなるワイヤを用いても、ワイヤ導出口の内面形状
を利用して真球状のきれいなボールを作製できる。同時
に、ボール形成時の熱をボンダで吸収してワイヤ組織の
粗大化領域を短くし、ワイヤレスボンディングにおいて
はバンプ形成時のネック切れ高さを低くし得、ワイヤボ
ンディングにおいてはループ形成時の低ループ化が図れ
る。
の外部リードとを、高い接合強度をもって導通不良など
を引き起こす虞れなく接続して、信頼性の高いワイヤボ
ンディング型,ワイヤレスボンディング型の半導体装置
を提供できる。またワイヤボンディング型においてはル
ープ形状の低ループ化により、LSIパッケージの小
型,薄型化の促進に寄与するなど、多くの効果を奏す
る。
断面図。
a2:ボール a3:ワイヤ組織の粗大化領域 a4:ネック切れ高さ W:ワイヤボンダ W4:キャピラリ
W5:ワイヤ挿通路 W6:導出口 W7:凹部
Claims (1)
- 【請求項1】ワイヤボンダにおけるワイヤ挿通路の先端
導出口から突出する金属ワイヤ先端を還元ガス雰囲気中
にて加熱してボールを作製する方法であって、前記導出
口内面に形成した略半球形状の凹部内にてワイヤ先端を
加熱して溶融ボールを形成し、且つその溶融ボールの表
面上半部を前記凹部内面に当接させてボールを作製する
ことを特徴とする金属ワイヤにおけるボールの形成方
法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34582492A JP3210456B2 (ja) | 1992-12-25 | 1992-12-25 | 金属ワイヤにおけるボールの形成方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34582492A JP3210456B2 (ja) | 1992-12-25 | 1992-12-25 | 金属ワイヤにおけるボールの形成方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06196522A JPH06196522A (ja) | 1994-07-15 |
JP3210456B2 true JP3210456B2 (ja) | 2001-09-17 |
Family
ID=18379227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34582492A Expired - Lifetime JP3210456B2 (ja) | 1992-12-25 | 1992-12-25 | 金属ワイヤにおけるボールの形成方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3210456B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1317751C (zh) * | 2005-01-12 | 2007-05-23 | 哈尔滨工业大学 | 双电热丝熔切直接制作钎料凸点的方法 |
JP6543579B2 (ja) * | 2016-01-28 | 2019-07-10 | 株式会社沖データ | 光学ヘッド、画像形成装置および画像読取装置 |
CN105755453B (zh) * | 2016-05-12 | 2018-06-05 | 重庆理工大学 | 一种抗地热水腐蚀的纳米化学复合镀层制备方法 |
-
1992
- 1992-12-25 JP JP34582492A patent/JP3210456B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH06196522A (ja) | 1994-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7449786B2 (en) | Semiconductor device having improved adhesion between bonding and ball portions of electrical connectors | |
US6661087B2 (en) | Lead frame and flip chip semiconductor package with the same | |
US5550407A (en) | Semiconductor device having an aluminum alloy wiring line | |
JP3935370B2 (ja) | バンプ付き半導体素子の製造方法、半導体装置及びその製造方法、回路基板並びに電子機器 | |
KR970018287A (ko) | 반도체 칩 본딩장치 | |
JP3210456B2 (ja) | 金属ワイヤにおけるボールの形成方法 | |
JPS62281435A (ja) | 半導体装置 | |
JPS61236130A (ja) | 半導体装置 | |
JP4042539B2 (ja) | Csp接続方法 | |
JPS60134444A (ja) | バンプ電極形成方法 | |
JP3322642B2 (ja) | 半導体装置の製造方法 | |
JP2007035863A (ja) | 半導体装置 | |
JPH08236575A (ja) | 半導体装置及びその製造方法 | |
JP2004221264A (ja) | 半導体装置及びその製造方法 | |
JP3202193B2 (ja) | ワイヤボンディング方法 | |
JPH098046A (ja) | 半導体チップの突起電極形成方法 | |
JP2001068497A (ja) | 半導体素子と回路基板との接続方法 | |
JP2882130B2 (ja) | 半導体装置の製造方法 | |
JP2929764B2 (ja) | 半導体装置 | |
JP3013133B2 (ja) | 複合リ−ドフレ−ム | |
JPH07122562A (ja) | バンプ形成方法及びワイヤボンディング方法並びにバンプ構造及びワイヤボンディング構造 | |
JP2003100791A (ja) | 多段バンプ形成方法 | |
JPH07122564A (ja) | バンプ形成方法 | |
JP2003309142A (ja) | 半導体装置及びその搭載方法 | |
JPH08241950A (ja) | 半導体装置及びその実装方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080713 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080713 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090713 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100713 Year of fee payment: 9 |