Invention Grant
- Patent Title: Electrically conductive paste
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Application No.: US16626667Application Date: 2018-06-27
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Publication No.: US11270810B2Publication Date: 2022-03-08
- Inventor: Aiko Hirata , Noriaki Nogami
- Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: DOWA ELECTRONICS MATERIALS CO., LTD.
- Current Assignee: DOWA ELECTRONICS MATERIALS CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Bachman and Lapointe PC
- Agent George Coury
- Priority: JPJP2017-130031 20170703,JPJP2018-119745 20180625
- International Application: PCT/JP2018/024270 WO 20180627
- International Announcement: WO2019/009146 WO 20190110
- Main IPC: H01B1/22
- IPC: H01B1/22 ; B22F1/02 ; H01B1/02

Abstract:
There is provided an electrically conductive paste which can prevent the increase of the volume resistivity of an electrically conductive film formed from the electrically conductive paste even if the electrically conductive film is heated to a soldering temperature of about 380° C. when the electrically conductive paste is a resin type electrically conductive paste using a silver powder and a silver-coated copper powder. In an electrically conductive paste containing a resin, a silver powder and a silver-coated copper powder having a copper powder, the surface of which is coated with a silver layer, the resin is an epoxy resin having a naphthalene skeleton, and there is added a dicarboxylic acid, preferably a dicarboxylic acid having a rational formula of HOOC—(CH2)n—COOH (n=1-8), and more preferably a dicarboxylic acid having a rational formula of HOOC—(CH2)n—COOH (n=4-7).
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