JPS63161631A - シリコン半導体素子 - Google Patents

シリコン半導体素子

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Publication number
JPS63161631A
JPS63161631A JP61314307A JP31430786A JPS63161631A JP S63161631 A JPS63161631 A JP S63161631A JP 61314307 A JP61314307 A JP 61314307A JP 31430786 A JP31430786 A JP 31430786A JP S63161631 A JPS63161631 A JP S63161631A
Authority
JP
Japan
Prior art keywords
deposited
layer
chip
soft solder
thickness
Prior art date
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Pending
Application number
JP61314307A
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English (en)
Inventor
Hideo Sakauchi
坂内 英雄
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.)
NEC Corp
Original Assignee
NEC Corp
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Application filed by NEC Corp filed Critical NEC Corp
Priority to JP61314307A priority Critical patent/JPS63161631A/ja
Publication of JPS63161631A publication Critical patent/JPS63161631A/ja
Pending 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
    • H01L24/04Structure, 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
    • H01L2224/05082Two-layer arrangements
    • 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
    • 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
    • H01L2224/05099Material
    • 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
    • H01L2224/05101Material 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
    • H01L2224/05111Tin [Sn] as principal constituent
    • HELECTRICITY
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    • 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
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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    • 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
    • H01L2224/05155Nickel [Ni] as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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
    • H01L2224/05639Silver [Ag] 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
    • H01L2224/02Bonding 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

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】 〔座業上の利用分野〕 本発明は半導体装置のシリコン素子テップの製造に関す
るもので、シリコン素子チップを固着する時のテップ)
Ik向のオーミック接触金員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
コン素子チップを固着する場合、チップ扱面のオーミッ
ク接触余積材料として一般にN1が用いられている。N
iでシリコン素子チップの裏面に良好なオーミック接触
1+=るためには、450℃以上の高温で、不活性ガス
雰囲気中で、シ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にAuを付層し
ていた。
この様な複雑なプロセスを採用する理山としては、高温
で、シンター処理を行う場合不活性ガス中の微量な酸素
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′!&触を得る方法で
は、シンター後酸化された余分なNiを除去し、再度N
i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又は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
、機械的接触蟻度にバラツキが大きく、信頼性又は、電
気的特性に悪影響を及t?i’L、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素子チ。
プ畏白のオーミック接触の構造及び製法は前記した従来
の方法の不具合な点を改良するためにある。
本発明のシリコン素子チップ裏面オーミック接触の電極
構造は、Ni−Sn −At  Au又は、Ni −S
n−4gの多rfJ槽造TNiとAt  (D間KSf
l介してg或することを特徴とする。製法としては、先
ず、Ni −8ll−Atを四−真空系で蒸着し、しか
る恢に良好なオーミック接触を得るため450℃以上の
温度で、具つ不活性ガス算囲気中で、シンター処理を行
ない、Ni−8iのシンタ一層を得る。
シンターを行なう際不活性ガス中の微量な酸素と従来は
N1の表面2が反応し、Niの酸化物が生成されると言
う不具合が避けられなかった。本発明によれば、N i
 −5n−Atの3層構造により高温でのシンター処理
中にNiとAgとの間のSnが熔融し、Niの表面に5
n−Ayの二元合金層が生成する。この合金層は、ポー
ラスに付着したgの層を通して侵入してくる不活性ガス
中の微量な酸素から、Niの表面を保護し、Niの酸化
物生成の反応を阻止するものである。更にシンター中の
熱処理によりSnが熔融することにより、Ni−Sn−
Ayの三元合金層が生成し、互いに密着度が高まり良好
オーミ、り接触が得られる。しかる後にシリコン素子チ
ップ固着時に半田ぬれ性を良くするためにN i −S
 n−Ayの表面にAuを蒸着しNi −Sn−Ay−
Auの4/il[造を採用すれば史によいチップ固着が
可能となる。この様にして得られるシリコン素子チップ
の層面電極構造は次工梶で、チップ固着する時、ソフト
ソルダーとのなじみが良好となる。尚チップ固着方法と
してチップの摺動により製造される場合には、N i 
−S n −Ayの3層構造のオーミック接触全域でも
可能であシ、表面のAu0層が不賛となる。
〔実施例〕
次に本発明について、第1図から第3図全参照して説明
する。
第1図は本発明の実施例1のシリコン素子チ。
プ裏面の電極構造の断面図である。シリコンウェハ1の
裏面に蒸潜法によlNi、Sn及びAtの3層を同−真
空系にて付着する。この場合Ni3は21OOO〜IQ
000人、Snは400〜600Å。
Ag、6はaoooA 〜12.00OA +7)厚さ
に付着する。次にNi−Sn−Ayが蒸着されたウェハ
は、一旦蒸看装置より取り出し、不活性ガス雰囲気、例
えばN、又はArガス中で450℃〜500℃の高温で
シンター処理を行ない、ニッケルシリサイドJ曽2を生
成し、良好な!Ik面のオーミック接触金得る。
このシンターの熱処理中にSnが熔融し、5n−A15
及びN鳳−Sn−Ar4の合金層が生成され、艮好な密
着度ヲ付つオーミック金rJj層が得られる。
更にソフトソルダーとのぬれ注を良くするため、しかる
後にAu・7を4000〜4000^の厚さを蒸着する
。この場合Auの粒子が黒海・される除にkfと反応し
、良好な密3jが得られるため新らためて、熱処理を行
なう会費はない。
第2図は本発明の実施例2のシリコン電子チップ表面の
′亀憚堝造の断面図である。これは第2図で示された山
谷でAu、7層がないもので、二?/ケルシリサイトノ
tI2、Ni  層3、N i −Sn−Ay 4繭4
.Sn−Ay層5、及びA2.6鳩で傷氏された構造を
有している。
第3図は、従来の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の表面に蒸着又はメッキ
によシNi を付宥し、450′C〜500℃のX?I
Aでシンターを行い二、ケルシリサイド層2を形成し、
チップ義…1のオーミック接触を得る。次に余分なNi
の酸化物を硝酸、塩酸吟でエツチングし、Niシリサイ
ド層2の表叩ヲ絽出石ぜる。しかる恢に4′l)度Ni
、3を蒸着又は、メ、キにより2000A〜IQOOO
^付着する。史に半田とのなじみを良好ならしめるため
にAufI:蒸着又はメッキにより2000〜4.00
0層付着し、しかる後にダイシングを付ないシリコン素
子のチップを待ていた。
〔発明の効果〕
以上説明した様に不発明はシリコン素子チップの表面の
電惨徊造をへt  Sn ky Au又にへi −5n
−AyとNiとAyの間にSn  を介してMFtiす
ることにより、次工株でのチップ固着工程に於けるソフ
トンルダーとのなじみ及びぬれ性の良好な安冗したプロ
セスが確立出来、これを応用した半導体装置は、電気的
特性、信顆反及び歩留等が飛メー的に改善出来その効果
は非常に太きい。
【図面の簡単な説明】
第1図は本発明の実施?’J 1のシリコン素子チップ
の裏面丸極構造の断面図、第2図は本発明の実施例2の
シリコン素子チップの扱面電極慎造の断面図、第3図?
i従Xのシリコン素子チップの裏面′IiL極構造の折
m1図で、うる。 1・・・・・・シリコンチップ、2・・・・・・ニッケ
ルシリサイド、3・・・・・・Ni、y、4・・・・・
・Ni−Sn−Ay三元合金噛、5・・・・・・Sn−
Ay二元合金層、6・・・・・・A2會、7・・・・・
・Au層、8・・・・・・シリコン素子チップ。 代理人 弁理士  内 FAJW ′) 翁30

Claims (1)

    【特許請求の範囲】
  1. シリコン素子チップの裏面電極構造をNi−Sn−Ag
    又はNi−Sn−Ag−Auの多層構造でNiとAgの
    間にSnを介して構成することを特徴とするシリコン半
    導体素子。
JP61314307A 1986-12-24 1986-12-24 シリコン半導体素子 Pending JPS63161631A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61314307A JPS63161631A (ja) 1986-12-24 1986-12-24 シリコン半導体素子

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61314307A JPS63161631A (ja) 1986-12-24 1986-12-24 シリコン半導体素子

Publications (1)

Publication Number Publication Date
JPS63161631A true JPS63161631A (ja) 1988-07-05

Family

ID=18051779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61314307A Pending JPS63161631A (ja) 1986-12-24 1986-12-24 シリコン半導体素子

Country Status (1)

Country Link
JP (1) JPS63161631A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014150228A (ja) * 2013-02-04 2014-08-21 Toyota Central R&D Labs Inc 積層電極

Citations (5)

* 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
JPS5323568A (en) * 1976-08-18 1978-03-04 Toshiba Corp Semiconductor device
JPS5694663A (en) * 1979-12-27 1981-07-31 Nec Home Electronics Ltd Semiconductor device
JPS56142633A (en) * 1980-04-08 1981-11-07 Mitsubishi Electric Corp Forming method for back electrode of semiconductor wafer
JPS58164232A (ja) * 1982-03-24 1983-09-29 Toshiba Corp 半導体装置

Patent Citations (5)

* 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
JPS5323568A (en) * 1976-08-18 1978-03-04 Toshiba Corp Semiconductor device
JPS5694663A (en) * 1979-12-27 1981-07-31 Nec Home Electronics Ltd Semiconductor device
JPS56142633A (en) * 1980-04-08 1981-11-07 Mitsubishi Electric Corp Forming method for back electrode of semiconductor wafer
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
JP2014150228A (ja) * 2013-02-04 2014-08-21 Toyota Central R&D Labs Inc 積層電極

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