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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11413685 B1

PDFFull Text
Date of Patent:
Aug. 16, 2022

Filed:

Sep. 19, 2018

Silver powder mixture, method for producing same, and conductive paste

Applicant:

Dowa Electronics Materials Co., Ltd., Tokyo, JP;

Inventors:

Genta Sasaki, Tokyo, JP;

Taku Okano, Tokyo, JP;

Yoshio Moteki, Tokyo, JP;

Yu Saito, Tokyo, JP;

Assignee:

DOWA ELECTRONICS MATERIALS CO., LTD., Tokyo, JP;

Attorney:

Clark & Brody LP

Primary Examiner:

Alexandre F Ferre

Int. Cl.
CPC ...
C07K 14/255 (2006.01); A61K 38/00 (2006.01); A61K 39/00 (2006.01); A61P 37/06 (2006.01); B22F 9/24 (2006.01); C09D 7/40 (2018.01); C09D 5/24 (2006.01); H01B 1/16 (2006.01); B22F 1/05 (2022.01); B22F 1/065 (2022.01); B22F 1/068 (2022.01); B22F 1/054 (2022.01);
U.S. Cl.
CPC ...
B22F 9/24 (2013.01); B22F 1/05 (2022.01); B22F 1/0547 (2022.01); B22F 1/065 (2022.01); B22F 1/068 (2022.01); C09D 5/24 (2013.01); C09D 7/70 (2018.01); H01B 1/16 (2013.01); B22F 2301/255 (2013.01); B22F 2304/10 (2013.01);
Abstract

A silver powder mixture that is suitable for forming a conductive film on a surface of a member having stretchability, a method for producing the same, and a conductive paste using the silver powder mixture is provided. A silver powder mixture containing filamentous silver powder including spherical and filamentous parts and flaky silver powder having an average particle diameter of 1 μm or more and 50 μm or less and an aspect ratio, which is defined by a ratio of an average long diameter and an average thickness, of 1.5 or more is obtained by adding one kind or two or more kinds of a salt of copper and aluminum and ethylenediaminetetraacetic acid to a silver nitrate aqueous solution, for 60 seconds or more, and then adding a reducing agent containing one kind or two or more kinds of L-ascorbic acid, erythorbic acid, and salts thereof.

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