JPH0436462B2 - - Google Patents

Info

Publication number
JPH0436462B2
JPH0436462B2 JP11497583A JP11497583A JPH0436462B2 JP H0436462 B2 JPH0436462 B2 JP H0436462B2 JP 11497583 A JP11497583 A JP 11497583A JP 11497583 A JP11497583 A JP 11497583A JP H0436462 B2 JPH0436462 B2 JP H0436462B2
Authority
JP
Japan
Prior art keywords
bonding
wire
less
ball
alloy
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
Application number
JP11497583A
Other languages
English (en)
Other versions
JPS607164A (ja
Inventor
Kenichi Sato
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP58114975A priority Critical patent/JPS607164A/ja
Publication of JPS607164A publication Critical patent/JPS607164A/ja
Publication of JPH0436462B2 publication Critical patent/JPH0436462B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/002Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating specially adapted for particular articles or work
    • B23K20/004Wire welding
    • B23K20/005Capillary welding
    • B23K20/007Ball bonding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/43Manufacturing methods
    • H01L2224/432Mechanical processes
    • H01L2224/4321Pulling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/44Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L2224/45Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/44Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L2224/45Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • H01L2224/45001Core members of the connector
    • H01L2224/45099Material
    • H01L2224/451Material 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
    • H01L2224/45117Material 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
    • H01L2224/45124Aluminium (Al) as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/485Material
    • H01L2224/48505Material at the bonding interface
    • H01L2224/4851Morphology of the connecting portion, e.g. grain size distribution
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/85Methods 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01004Beryllium [Be]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01005Boron [B]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01013Aluminum [Al]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01014Silicon [Si]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01022Titanium [Ti]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01025Manganese [Mn]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/14Integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Bonding (AREA)
  • Conductive Materials (AREA)

Description

【発明の詳細な説明】
(技術分野) 本発明は、半導体装置、集積回路(IC)等
(以下、IC等と称す)の電気的接続に用いられる
ボンデイングワイヤに関するものである。 (背景技術) 従来、例えばICチツプとパツケージを電気接
続するには、第1図に示すように、IC1の電極
2とパツケージ3の導電回路4の間をボンデイン
グワイヤ5により接続していた。 このボンデイングワイヤには極細の金属線が用
いられる。従来Al線としては線径25μ近傍のもの
にはAl―1%Si合金線が使用されていたが、こ
れはIC等へのボンデイングに超音波圧接による
ウエツジボンデイングしか使用できず、この方法
には方向性があるため、1ボンデイング当りの所
要時間が長く、従来のAu線の無方向性ボールボ
ンデイングに対抗できなかつた。ここでボールボ
ンデイングとは、酸水素炎や放電などの手段によ
り接続部にボールを形成させてボンデイングする
方法である。 一方ICチツプの電極はAl又はAl合金が殆んど
であり、Al―Auの接続は後工程の加熱時におい
て金属間化合物が生成して脆くなり、信頼性が
Al―Alの接続より劣つており、又Auの使用によ
るコストの増加が不可避であつた。 ボンデイングマシーンの改良により、放電等に
よりAl線についてもボール形成が成されるよう
になつたが、いずれの方法も高温によるボール形
成法をとるため、ボールおよびボール近傍の線材
に結晶粒の粗大化を生じ、ボンデイング強度が低
い欠点があつた。 (発明の開示) 本発明は、上述の問題点を解決するため成され
たもので、高温によるボール形成時にもボールお
よびボール近傍の結晶粒の粗大化を防止して、ボ
ールボンド法によるボンデイングを可能にすると
共に、ボンデイング強度を向上し、コストを低減
し得るボンデイングワイヤを提供せんとするもの
である。 本発明は、Tiを0.002〜0.5%、Bを0.0005〜0.1
%含み、Feを0.05%以下、Siを0.03%以下に規定
し、残部が本質的にAlよりなる合金から成るこ
とを特徴とするボンデイングワイヤである。 本発明において、合金中のTiはボンデイング
時のボール形成におけるボールおよびボール近傍
の線材の結晶粒の粗大化を防止して、ボンデイン
グの強度、信頼性を改良するものである。Ti量
を0.002〜0.5%と規定したのは、0.002%未満では
結晶粒の粗大化防止に効果なく、0.5%を越える
と伸線性の劣化を招くからである。 同時に、Bを0.0005〜0.1%の範囲で添加する。
Al合金中のBは結晶粒の粗大化の防止をさらに
効果あらしめるために添加するもので、Bが
0.0005%未満では改善効果がなくBが0.1%を越
えると効果が飽和するのみならず伸線性の劣化を
招く。 又合金中のFeを0.05%以下、Siを0.03%以下に
規定するのは伸線加工性を良くするためで、
Fe/Si比を2以上にすることが望ましく、それ
ぞれ上記限界外となると極細線への加工が難かし
くなる。なお、Feを0.05%以下というのは不純物
レベルを示したものである。 又、本発明において、更にAl合金中にMn0.1〜
2.0%含むものは、耐食性の向上とボンデイング
におけるボール形成能を改良するもので、Mn0.1
%未満では耐食性、ボール形成能の改善効果な
く、2.0%を越えると鋳造時に晶出物を形成する
量が多く、伸線加工性が悪くなる。 かように構成することにより、本発明のボンデ
イングワイヤは線径25μ前後の極細線として優れ
た耐食性、加工性、ボールボンデイング性を得る
ことができる。 (実施例) 表1に示す組成の合金を、純度99.99%のAl地
合に、Al―5%Ti、Al―10%Mn、Al―1%合
金、金属Siを添加して溶製した後、溶湯からセラ
ミツクフイルターで10μ以上の介在物を除去し
て、ビレツトに鋳造した。 このビレツトを、ホモ処理、表面切削した後、
熱間押出しにより10mmφの線材とした後、皮剥、
伸線、中間熱処理を組合せて25μmmφのボンデイ
ングワイヤを作成した。 得られたボンデイングワイヤの製造時の伸線
性、耐食性、ボールボンデイングによるボンデイ
ング強度は表1に示す通りである。 伸線性は、伸線量1g当りの断線率をAl―1%
Si合金の場合を1.0として相対値で表わしたもの
であり、耐食性は、温度45℃、相対湿度90%にお
ける寿命を同じく相対値で表わしたものであり、
ボンデイング強度は、ボンデイングワイヤを放電
方式のボールボンダーにてICチツプとリードフ
レームの間をボンデイングして、線の中央におい
て破壊試験をした時の強度を同じく相対値で表わ
したものである。
【表】 表1より、本発明によるNo.1〜No.8は従来例に
比べ、いずれも伸線性良好で、ボンデイングワイ
ヤとしての耐食性に優れ、ボンデイング強度が高
いことが分る。 (発明の効果) 上述のように構成された本発明のボンデイング
ワイヤは次のような効果がある。 (イ) Al合金が、Ti0.002〜0.5%、B0.005〜0.1%、
更にMn0.1〜2.0%を含むため、ボンデイング
時のボール形成におけるボールおよびボール近
傍の線材の結晶粒の粗大化を防止するので、ボ
ンデイングの強度が高く、Feを0.05%以下、Si
を0.03%以下に規定したため、伸線加工性が良
く、製造が容易である。 (ロ) IC等へのボールボンデイングが可能である
ため、ボンデイング速度を向上し、又Au線を
使用せず、かつ耐食性を向上するため、IC等
への信頼性を向上し、コストを低減する。
【図面の簡単な説明】
図はICのボンデイングの例を示す断面図であ
る。 1…IC、2…電極、3…パツケージ、4…導
電回路、5…ボンデイングワイヤ。

Claims (1)

  1. 【特許請求の範囲】 1 Tiを0.002〜0.5%、Bを0.0005〜0.1%含み、
    Feを0.05%以下、Siを0.03%以下に規定し、残部
    が本質的にAlよりなる合金から成ることを特徴
    とするボンデイングワイヤ。 2 Tiを0.002〜0.5%、Bを0.0005〜0.1%、Mn
    を0.1〜2.0%含み、Feを0.05%以下、Siを0.03%
    以下に規定し、残部が本質的にAlよりなる合金
    から成ることを特徴とするボンデイングワイヤ。
JP58114975A 1983-06-24 1983-06-24 ボンデイングワイヤ Granted JPS607164A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58114975A JPS607164A (ja) 1983-06-24 1983-06-24 ボンデイングワイヤ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58114975A JPS607164A (ja) 1983-06-24 1983-06-24 ボンデイングワイヤ

Publications (2)

Publication Number Publication Date
JPS607164A JPS607164A (ja) 1985-01-14
JPH0436462B2 true JPH0436462B2 (ja) 1992-06-16

Family

ID=14651255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58114975A Granted JPS607164A (ja) 1983-06-24 1983-06-24 ボンデイングワイヤ

Country Status (1)

Country Link
JP (1) JPS607164A (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5887841A (ja) * 1981-11-20 1983-05-25 Tanaka Denshi Kogyo Kk 半導体素子のボンデイング用Al線

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5887841A (ja) * 1981-11-20 1983-05-25 Tanaka Denshi Kogyo Kk 半導体素子のボンデイング用Al線

Also Published As

Publication number Publication date
JPS607164A (ja) 1985-01-14

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