JPS62286236A - シリコン半導体装置の製造方法 - Google Patents

シリコン半導体装置の製造方法

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Publication number
JPS62286236A
JPS62286236A JP61130809A JP13080986A JPS62286236A JP S62286236 A JPS62286236 A JP S62286236A JP 61130809 A JP61130809 A JP 61130809A JP 13080986 A JP13080986 A JP 13080986A JP S62286236 A JPS62286236 A JP S62286236A
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Prior art keywords
chip
silicon
rear surface
improve
ohmic contact
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Granted
Application number
JP61130809A
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JPH0693466B2 (ja
Inventor
Hideo Sakauchi
坂内 英雄
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NEC Corp
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NEC Corp
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Priority to JP61130809A priority Critical patent/JPH0693466B2/ja
Publication of JPS62286236A publication Critical patent/JPS62286236A/ja
Publication of JPH0693466B2 publication Critical patent/JPH0693466B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/482Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body
    • H01L23/4827Materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means 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
    • H01L24/02Bonding areas ; Manufacturing methods related thereto
    • H01L24/03Manufacturing methods
    • HELECTRICITY
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    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means 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
    • H01L24/02Bonding areas ; Manufacturing methods related thereto
    • H01L24/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L24/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • 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
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/035Manufacturing methods by chemical or physical modification of a pre-existing or pre-deposited material
    • H01L2224/03505Sintering
    • 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
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/04026Bonding areas specifically adapted for layer connectors
    • 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
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/05001Internal layers
    • H01L2224/05075Plural internal layers
    • H01L2224/0508Plural internal layers being stacked
    • H01L2224/05083Three-layer arrangements
    • HELECTRICITY
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    • 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
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/05001Internal layers
    • H01L2224/05099Material
    • H01L2224/051Material 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
    • H01L2224/05138Material 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
    • H01L2224/05139Silver [Ag] as principal constituent
    • HELECTRICITY
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    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/05001Internal layers
    • H01L2224/05099Material
    • H01L2224/051Material 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
    • H01L2224/05138Material 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
    • H01L2224/05155Nickel [Ni] as principal constituent
    • HELECTRICITY
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    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554External layer
    • H01L2224/05599Material
    • H01L2224/056Material 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
    • H01L2224/05638Material 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
    • H01L2224/05644Gold [Au] as principal constituent
    • HELECTRICITY
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    • H01L2224/26Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/28Structure, shape, material or disposition of the layer connectors prior to the connecting process
    • H01L2224/29Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
    • H01L2224/29001Core members of the layer connector
    • H01L2224/29099Material
    • H01L2224/291Material 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
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    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/93Batch processes
    • H01L2224/94Batch processes at wafer-level, i.e. with connecting carried out on a wafer comprising a plurality of undiced individual devices
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    • H01L24/94Batch processes at wafer-level, i.e. with connecting carried out on a wafer comprising a plurality of undiced individual devices
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    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/102Material of the semiconductor or solid state bodies
    • H01L2924/1025Semiconducting materials
    • H01L2924/10251Elemental semiconductors, i.e. Group IV
    • H01L2924/10253Silicon [Si]

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Die Bonding (AREA)
  • Electrodes Of Semiconductors (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 3、発明の詳細な説明 〔産業上の利用分野〕 本発明は半導体装置のチップの製造に関するもので、チ
ップを固着する時のチップ裏面のオーミック接触金属の
構造及びその製法に関するものである。
〔従来の技術〕
従来、半導体装置に於て、ソフトソルダーを用いて、シ
リコンチップを固着する場合、チップ裏面のオーミック
接触金属材料として一般にNi  が用いられている。
Ni で良好なオーミック接触を得るためには450℃
以上の高温で不活性ガス雰囲気中でンンター処理を行な
いしかる後に、Niのシンタ一層を残し余分なNi を
除去し、再度Niを付着し、更に半田のなじみを良くす
るためAuを付着していた。
この様な複雑な工程を採用する理由としてケよ高温でン
ンター処理を行なう場合不活性ガス中の微tな酸素と反
応し、Ni  の表面が酸化され、次工程でのチップ固
着に於ける半田付は作業に不具合が生じるためである。
〔発明が解決しようとする問題点〕
上述した従来のNi のオーミック接触を得る方法では
、シンター後余分なNi  を除去し、再度Niを付着
する場合付着する前の前処理のバラツキ及び蒸着する時
の真空度のバラツキ及び有機性の汚れ等の極小量の影響
で、チップをソフトソルダーで固着した後に、機械的接
触強度にバラツキが大きく、信頼性又は、を気的特性に
悪影響を及ぼしていた。
〔問題点を解決するための手段〕
本発明の半導体装置に於けるシリコンチップ裏面のオー
ミック接触の構造及び製法は、上述した従来方法の不具
合な点を改良するためにある。シリコンチップ裏面オー
ミック接触の電極構造としてN i −Ag −kll
の3層構造を有することを特徴とする。先ずNi−Ag
を同−真空系で蒸着を行い、しかる後に良好なオーミッ
ク接触を得るために比較的高温(450℃以上)で、不
活性ガス雰囲気中でシンター処理を行い、Ni−8iの
シンタ一層を得る。シンターを行う際、不活性ガス中の
微量なOlと従来はNiの表面と反応しNi の酸化物
が生成されると言う不具合が避けらnなかった。本発明
によれば、Ni−Agの二層構造により、シンター中の
不活性ガス中の微量なOlは貴金属であるAgによ)N
iの表面はほば完全に保護される。
又シンターの熱処理により、Niと勾の界面で互いに拡
散し合い、密着強度が高まυ、良好なオーミックが得ら
れる。しかる後に更にチップ固着時に半田ぬれ性を艮く
するためにNi−AgのAgの表面にAuを蒸着しNi
 −Ag −Auの三層構造を得る。AuをAgの表面
に蒸着する際の熱でAuの粒子がAg と反応し良好な
密着が得られる。この様にして得られたシリコンチップ
の裏面電極は次工程でチップを固着する時、ソフトソル
ダーとのなじみが良好となる。
〔実施例〕
欠に本発明について、第1図から第2図を参照して説明
する。第2図は、従来のシリコンチップ裏面の電極構造
断面図である。シリコンウェハ1の裏面に蒸着又はメッ
キによシNi  を付着し、比較的高温で、シンターを
行い、Ni  クリサイド層2を形成し、コレクタ一層
のオーミック接触を得る。次に余分なNi の酸化物を
硝酸等でエツチングし、Ni  シリサイド層の表面を
露出させる。しかる後に再度Ni、3を蒸着又はメッキ
により約500OA付着する。更に半田とのなじみを良
好ならしめるためにAu 、 5を蒸着又はメッキによ
り付着し、しかる後に、ダイシングを行ない、シリコン
素子のチップ6を得ていた。
第1図は、本発明によるシリコン素子チップ裏面の電極
構造断面図である。シリコンウェハ1の裏面に蒸着法に
より、Ni及び々の2層を同−真空系にて付着する。こ
の場合、Ni、3は約5000工程中でNi 表面の酸
化は防止可能である。次にNi−Agが蒸着されたウェ
ハは一旦蒸着装置より取出し、不活性ガス雰囲気例えば
N、、Ar中で比較的高温450℃〜500°Cの温度
でシンター処理を行ないニッケルシリサイド層2t−生
成することにより良好なオーミック接触を得る。しかる
後にソフトソルダーとのぬれ性を良くするため更にAu
、5t−約300OAの厚さを蒸着する。この場合Au
の粒子が蒸着される際% Agと反応し、良好な密着が
得られるため新らためて熱処理を行う必要はない。最後
にダイシングを行ない、シリコン素子のチップ6を得る
〔発明の効果〕
以上説明した様に、本発明はシリコン素子チップの裏面
の電極構をNi −Ag −Auの3層構造にすること
により、次工程であ゛るチップ固着工程に於けるソフト
ソルダーとのなじみ及びぬれ性の良好な安定したプロセ
スが確立出来、これを応用した半導体装置に於ては電気
的特性、信頼度、及び歩留等が飛躍的に改善されその効
果は非常に大きい。
【図面の簡単な説明】
第1図は、本発明のシリコンチップの裏面電極構造の断
面図、第2図は従来のシリコンチツプの裏面電極構造の
断面図である。 1・・・・・・シリコンチップ、2・・・・・・ニッケ
ルシリサイド層、3・・・・・・Ni層、4・・・・−
・Ag層、5・・・・・・Au層、6・・・・・・シリ
コン素子チップ。

Claims (1)

    【特許請求の範囲】
  1. シリコンチップの裏面電極構造をNi−Ag−Auの三
    層構造で構成したことを特徴とするシリコン半導体装置
JP61130809A 1986-06-04 1986-06-04 シリコン半導体装置の製造方法 Expired - Lifetime JPH0693466B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61130809A JPH0693466B2 (ja) 1986-06-04 1986-06-04 シリコン半導体装置の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61130809A JPH0693466B2 (ja) 1986-06-04 1986-06-04 シリコン半導体装置の製造方法

Publications (2)

Publication Number Publication Date
JPS62286236A true JPS62286236A (ja) 1987-12-12
JPH0693466B2 JPH0693466B2 (ja) 1994-11-16

Family

ID=15043212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61130809A Expired - Lifetime JPH0693466B2 (ja) 1986-06-04 1986-06-04 シリコン半導体装置の製造方法

Country Status (1)

Country Link
JP (1) JPH0693466B2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04211137A (ja) * 1990-01-10 1992-08-03 Hughes Aircraft Co 集積回路はんだダイ結合構造および方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287360A (en) * 1976-01-16 1977-07-21 Nec Home Electronics Ltd Semiconductor device
JPS5614233A (en) * 1979-07-17 1981-02-12 Ricoh Co Ltd Photosensitive heat-sensitive type recording member
JPS58164232A (ja) * 1982-03-24 1983-09-29 Toshiba Corp 半導体装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287360A (en) * 1976-01-16 1977-07-21 Nec Home Electronics Ltd Semiconductor device
JPS5614233A (en) * 1979-07-17 1981-02-12 Ricoh Co Ltd Photosensitive heat-sensitive type recording member
JPS58164232A (ja) * 1982-03-24 1983-09-29 Toshiba Corp 半導体装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04211137A (ja) * 1990-01-10 1992-08-03 Hughes Aircraft Co 集積回路はんだダイ結合構造および方法

Also Published As

Publication number Publication date
JPH0693466B2 (ja) 1994-11-16

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