JPH0123947B2 - - Google Patents

Info

Publication number
JPH0123947B2
JPH0123947B2 JP59184252A JP18425284A JPH0123947B2 JP H0123947 B2 JPH0123947 B2 JP H0123947B2 JP 59184252 A JP59184252 A JP 59184252A JP 18425284 A JP18425284 A JP 18425284A JP H0123947 B2 JPH0123947 B2 JP H0123947B2
Authority
JP
Japan
Prior art keywords
silver
copper
plating
conductor
plated
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
Application number
JP59184252A
Other languages
English (en)
Other versions
JPS6163044A (ja
Inventor
Norio Okabe
Osamu Yoshioka
Ryozo Yamagishi
Sadao Nagayama
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP59184252A priority Critical patent/JPS6163044A/ja
Publication of JPS6163044A publication Critical patent/JPS6163044A/ja
Publication of JPH0123947B2 publication Critical patent/JPH0123947B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H01L23/488Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/495Lead-frames or other flat leads
    • H01L23/49579Lead-frames or other flat leads characterised by the materials of the lead frames or layers thereon
    • H01L23/49582Metallic layers on lead frames
    • 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
    • H01L2224/438Post-treatment of the connector
    • H01L2224/43848Thermal treatments, e.g. annealing, controlled cooling
    • 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
    • H01L2224/4501Shape
    • H01L2224/45012Cross-sectional shape
    • H01L2224/45014Ribbon connectors, e.g. rectangular cross-section
    • 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
    • H01L2224/45138Material 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
    • H01L2224/45147Copper (Cu) 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
    • H01L2224/44Structure, 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
    • H01L2224/4554Coating
    • H01L2224/4557Plural coating layers
    • H01L2224/45572Two-layer stack coating
    • 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
    • H01L2224/4554Coating
    • H01L2224/45599Material
    • H01L2224/456Material 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
    • H01L2224/45638Material 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
    • H01L2224/45639Silver (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
    • H01L2224/42Wire 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
    • 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
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01015Phosphorus [P]
    • 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
    • H01L2924/01029Copper [Cu]
    • 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
    • H01L2924/01033Arsenic [As]
    • 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
    • H01L2924/01047Silver [Ag]
    • 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
    • H01L2924/01078Platinum [Pt]
    • 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
    • H01L2924/01082Lead [Pb]
    • 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
    • H01L2924/013Alloys
    • H01L2924/014Solder alloys

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Non-Insulated Conductors (AREA)

Description

【発明の詳細な説明】
産業上の利用分野 本発明は、電子部品用リード線またはリードフ
レーム等に用いられる銀めつきを施した導体に関
する。 従来の技術 従来、各種電子部品に用いられるリード線また
はリードフレームには、目的に応じて銅導体表面
に種々のめつきを施したものが利用されている。
中でも、第2図にその断面図を示すように、銅導
体1の表面に銀めつき2を施した導体は耐酸化性
に優れ、自然酸化や高温酸化においても酸化皮膜
が生成しにくいという特長があることから、他の
めつき導体に比べ優れた半田付性および電気特性
を示し、信頼性の要求される分野において広く使
用されている。 しかし、銀めつき層が薄いと、酸化雰囲気での
加熱処理によつて酸素は銀めつきを透過し易く、
銀めつき層のピンホールや結晶粒界等を介して素
地の銅が銀めつき層の表面に拡散するので、銅は
酸化されて銅と銀めつきとの界面に酸化皮膜が生
成してしまう。このような現象は、伸線や圧延な
どの加工により欠陥や加工変質層を有する銅導体
を素材とした場合に特に顕著に現われる。これは
銀めつきの電析組織が素地の表面状態に左右され
易いのでピンホール等の欠陥が生成し易く、さら
にめつき結晶が不均一となるので、加熱処理時の
銀―銅界面での熱拡散も不均一になるからであ
る。 発明が解決しようとする問題点 そこで本発明の目的は、従来の問題点を解消
し、熱処理によつても銅と銀めつきとの界面に酸
化皮膜が生ずることなく、半田付性が良好な安価
で製造できる銀めつき導体を提供することにあ
る。 問題点を解決するための手段および作用 本発明は、銅または銅合金よりなる導体の全面
に少なくとも0.5μの厚さの光沢銅めつき層を設
け、さらに該銅めつき層の全面に銀めつき層を設
けてなることを特徴とする銀めつき導体である。 光沢銅めつきは素地の銅導体の欠陥を保障し、
銅めつき上に設けられる銀めつきの結晶を緻密か
つ均一な欠陥のないものにするとともに、銀めつ
きの密着性を高める作用を成す。そして加熱処理
時に銀―銅界面に均一な拡散合金属を形成せしめ
ることにより、半田付性低下の原因となる不連続
な銅の酸化膜の生成を防止する。 このようなことから、光沢銅めつきとしては微
細結晶で均一な平滑めつきの得られるものであれ
ばよく、めつき浴の種類(硫酸銅浴、シアン化銅
浴、ピロリン酸銅浴など)や光沢剤の種類および
電解方法(直流、PR法、交流併用法)など、そ
の製造方法には制限されない。 実施例 以下、図面に基づいて本発明の実施例を説明す
る。 実施例 1 第3図に示す形状のIC用リードフレーム(錫
入銅、厚さ0.25mm)を用意し、アルカリ電解脱脂
および希硫酸洗浄を行なつた後、光沢硫酸銅めつ
き浴(CuSO4200g/、H2SO430ml/、荏原ユ
ージライト(株)社製光沢剤ユーバツク#1 5ml/
)を用いて、室温、電流密度5A/dm2の条件で
光沢銅めつき下地を0.2〜2.0μの厚さで設ける。
さらにその上に銀ストライクめつき(AgCN5g/
、KCN70g/、室温、電流密度4A/dm2×5
秒)および銀めつき(AgCN40g/、KCN100
g/、K2CO320g/、室温、電流密度2A/d
m2)を3μおよび5μの厚さで設けた銀めつきリー
ドフレームを作成した。第1図にその断面図を示
してあり、1は銅導体、2は光沢銅めつき、3は
銀めつきである。 そしてこの銀めつきリードフレームと第2図に
示した構造の従来の銀めつきリードフレームの、
加熱処理後の半田付性を調べた結果を第1表に示
した。ここで加熱処理は空気恒温槽により350℃
×5分の条件で行ない、MILSTD202D208Bの試
験方法に準拠してアウターリード5の半田付性を
評価した。なお、試料は半田付前にロジンフラツ
クスを塗布し、半田付性の判定は半田のぬれ面積
の比率で行なつた。
【表】
(単位μ)
◎:98%以上 ○:98〜95%
△:95〜90% ×:90%未満
上記表からも明らかなように、光沢銅めつき下
地を設けることにより半田付性が向上し、特に
0.5μ以上の厚さで設けた場合には銀めつき厚を薄
くしても良好な半田付性を示すことがわかる。 実施例 2 直径0.8mmの純銅導線を素材とし、光沢シアン
化銅めつき浴(CuCN70g/、遊離NaCN13g/
、ロダンカリ15g/、ロツセル塩20g/、奥
野製薬(株)社製光沢剤ニユーレアCR―1 0.8ml/
、CR−2 1ml/、pH12.8)を用いて60℃、
PR電解法(平均電流密度3A/dm2、PR比15:
3)により光沢銅めつき下地を設けた後、実施例
1と同様の方法で銀めつきを設け銀めつきリード
線を作成した。この断面図を第4図に示してあ
り、8は銅導線、2は光沢銅めつき、3は銀めつ
きである。 このリード線の加熱処理後の半田付性を調べた
結果、実施例1で得られた結果と同様に良好な半
田付特性が得られた。 なお本発明は上記実施例に限定されるものでは
なく、例えば銀めつきの耐熱性や耐変色性を向上
させるために銀めつきを光沢化する等、目的に応
じて他の処理を組み合わせて施すことも可能であ
る。 発明の効果 以上説明したように、本発明によれば銀めつき
厚を薄くしても加熱処理後の半田特性の低下がな
く信頼性の高い銀めつき導体を得ることができ、
さらに銀の使用量が少ないので低コストで製造で
きるという効果がある。
【図面の簡単な説明】
第1図は本発明の一実施例である銀めつきリー
ドフレームの断面図、第2図は従来の銀めつき導
体の断面図、第3図はICリードフレームの平面
図、第4図は本発明の他の実施例である銀めつき
リード線の断面図である。 図中符号 1……銅導体、2……光沢銅めつ
き、3……銀めつき、4……リードフレーム、5
……アウターリード、6……インナーリード、7
……タブ、8……銅導線。

Claims (1)

    【特許請求の範囲】
  1. 1 銅または銅合金よりなる導体の全面に少なく
    とも0.5μの厚さの光沢銅めつき層を設け、さらに
    該銅めつき層の全面に銀めつき層を設けてなるこ
    とを特徴とする銀めつき導体。
JP59184252A 1984-09-03 1984-09-03 銀めつき導体 Granted JPS6163044A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59184252A JPS6163044A (ja) 1984-09-03 1984-09-03 銀めつき導体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59184252A JPS6163044A (ja) 1984-09-03 1984-09-03 銀めつき導体

Publications (2)

Publication Number Publication Date
JPS6163044A JPS6163044A (ja) 1986-04-01
JPH0123947B2 true JPH0123947B2 (ja) 1989-05-09

Family

ID=16150053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59184252A Granted JPS6163044A (ja) 1984-09-03 1984-09-03 銀めつき導体

Country Status (1)

Country Link
JP (1) JPS6163044A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10109397B2 (en) 2010-08-31 2018-10-23 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US11664137B2 (en) 2010-08-31 2023-05-30 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2580059B2 (ja) * 1990-03-23 1997-02-12 シャープ株式会社 固体撮像素子およびその製造方法
KR100266726B1 (ko) * 1995-09-29 2000-09-15 기타지마 요시토시 리드프레임과 이 리드프레임을 갖춘 반도체장치
IT201600086321A1 (it) * 2016-08-19 2018-02-19 St Microelectronics Srl Procedimento per realizzare dispositivi a semiconduttore e dispositivo corrispondente

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10109397B2 (en) 2010-08-31 2018-10-23 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US10109396B2 (en) 2010-08-31 2018-10-23 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US11664137B2 (en) 2010-08-31 2023-05-30 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US11923112B2 (en) 2010-08-31 2024-03-05 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods

Also Published As

Publication number Publication date
JPS6163044A (ja) 1986-04-01

Similar Documents

Publication Publication Date Title
US20060016694A1 (en) Tin-plated film and method for producing the same
US11166378B2 (en) Carrier-foil-attached ultra-thin copper foil
JPS60106993A (ja) はんだ接合性パラジウム−ニツケル被膜及びその製造方法
US3999955A (en) Strip for lead frames
TWI404835B (zh) Electronic parts and manufacturing methods thereof
JPH09331007A (ja) 電子部品リード部材及びその製造方法
US11164831B2 (en) Carrier-foil-attached ultra-thin copper foil
JP2001107290A (ja) 電子部品用錫系めっき条材とその製造法
JPH0123947B2 (ja)
JPH04337657A (ja) 半導体装置用リードフレーム
US4055062A (en) Process for manufacturing strip lead frames
JP2005105307A (ja) リフローSnめっき部材、前記部材の製造方法、および前記部材が用いられた電気電子機器用部品
JP3303594B2 (ja) 耐熱銀被覆複合体とその製造方法
JP7096955B1 (ja) Ni電解めっき皮膜を備えるめっき構造体及び該めっき構造体を含むリードフレーム
JPH10233121A (ja) リードワイヤ
JP3779864B2 (ja) 電子部品用リード線とその製造方法、そのリード線を用いた電子部品
JPH058276B2 (ja)
JPS5837922B2 (ja) 耐熱性配線用電気導体
US11917755B2 (en) Carrier-foil-attached ultra-thin copper foil
JPH111793A (ja) リフロー半田めっき材およびその製造方法
JPH1084065A (ja) 電子部品用導電材料
JP3700924B2 (ja) 電解コンデンサ用リード線とその製造方法
JPS5949651B2 (ja) 耐熱性配線用電気導体
JP4014739B2 (ja) リフローSnめっき材及び前記リフローSnめっき材を用いた端子、コネクタ、又はリード部材
JPS62199796A (ja) 電子・電気機器用部品