Invention Grant
- Patent Title: Solder composition, electronic board, and bonding method
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Application No.: US16114640Application Date: 2018-08-28
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Publication No.: US10913132B2Publication Date: 2021-02-09
- Inventor: Nobuhiro Yamashita , Jun Aoki , Shinichi Usukura , Satoshi Okumura
- Applicant: TAMURA CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TAMURA CORPORATION
- Current Assignee: TAMURA CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Rankin, Hill & Clark LLP
- Priority: JP2017-165505 20170830,JP2018-147523 20180806
- Main IPC: B23K35/362
- IPC: B23K35/362 ; H05K3/34 ; B23K35/36 ; B23K35/02 ; B23K101/42

Abstract:
A solder composition contains: flux composition containing (A) rosin-based resin, (B) activator, and (C) solvent; and (D): solder powder with a melting point of 200 to 250 degrees C. The component (A) contains (A1) rosin-based resin with a softening point of 120 degrees C. or more and an acid number of 220 mgKOH/g or more and (A2) rosin-based resin with a softening point of 100 degrees C. or less and an acid number of 20 mgKOH/g or less. The component (C) contains (C1) hexanediol solvent with a melting point of 40 degrees C. or more and a boiling point of 220 degrees C. or less and (C2) solvent with a viscosity of 10 mPa·s or less at 20 degrees C. and a boiling point of 270 degrees C. or more. A content of the component (A1) ranges from 15 to 25 mass % with respect to the flux composition (100 mass %).
Public/Granted literature
- US20190061070A1 SOLDER COMPOSITION, ELECTRONIC BOARD, AND BONDING METHOD Public/Granted day:2019-02-28
Information query
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