- 专利标题: Solder Transfer Sheet, Solder Bump, and Solder Precoating Method Using Solder Transfer Sheet
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申请号: US15539341申请日: 2015-12-21
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公开(公告)号: US20170354042A1公开(公告)日: 2017-12-07
- 发明人: Kaichi Tsuruta , Takeo Saitoh , Manabu Muraoka , Hiroki Oshima , Koji Yamashita , Shinichiro Kawahara
- 申请人: Senju Metal Industry Co., Ltd. , NITTA CORPORATION
- 优先权: JP2014-265348 20141226
- 国际申请: PCT/JP2015/085731 WO 20151221
- 主分类号: H05K3/34
- IPC分类号: H05K3/34 ; H01L23/492 ; H01L21/60 ; C09J201/02 ; C09J11/04 ; C09J7/02
摘要:
Provided is a solder transfer sheet which is capable of increasing the amount of solder to be transferred without the occurrence of bridging. A solder transfer sheet 1A includes a base material 5, an adhesive layer 4 formed on the surface of the base material 5, a solder powder-containing adhesive layer 3 formed on the surface of the adhesive layer 4, and a solder powder layer 2 formed on the surface of the solder powder-containing adhesive layer 3. In the solder powder layer 2, particles of solder powder 20 are arranged in a one-layer sheet form. In the solder powder-containing adhesive layer 3, solder powder 30 and an adhesive component 31 are mixed so as to have such a thickness that two or more layers of the solder powder 30 are stacked.
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