Invention Grant
- Patent Title: Solder ball and electronic member
- Patent Title (中): 焊球和电子元件
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Application No.: US14405691Application Date: 2014-05-12
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Publication No.: US09320152B2Publication Date: 2016-04-19
- Inventor: Shinichi Terashima , Takayuki Kobayashi , Masamoto Tanaka , Katsuichi Kimura , Tadayuki Sagawa
- Applicant: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD. , NIPPON MICROMETAL CORPORATION
- Applicant Address: JP Tokyo JP Saitama
- Assignee: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.,NIPPON MICROMETAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.,NIPPON MICROMETAL CORPORATION
- Current Assignee Address: JP Tokyo JP Saitama
- Agency: Kenyon & Kenyon LLP
- Priority: JP2013-113421 20130529
- International Application: PCT/JP2014/062588 WO 20140512
- International Announcement: WO2014/192521 WO 20141204
- Main IPC: B23K31/02
- IPC: B23K31/02 ; H05K3/34 ; B23K1/00 ; B23K35/26 ; C22C13/02 ; C22C13/00 ; B23K35/02 ; H05K1/18

Abstract:
A solder ball which suppresses generation of voids in a joint, excels in a thermal fatigue property, and can also obtain a good drop impact resistance property, and an electronic member using the same are provided. The solder ball is formed of a Sn—Bi type alloy containing Sn as a main element, 0.3 to 2.0 mass % of Cu, 0.01 to 0.2 mass % of Ni, and 0.1 to 3.0 mass % of Bi, and an intermetallic compound of (Cu, Ni)6Sn5 is formed in the Sn—Bi alloy so that the generation of voids in the joint when being jointed to an electrode is suppressed, a thermal fatigue property is excellent, and a good drop impact resistance property can also be obtained.
Public/Granted literature
- US20150146394A1 SOLDER BALL AND ELECTRONIC MEMBER Public/Granted day:2015-05-28
Information query
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