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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 10807161 B1

PDFFull Text
Date of Patent:
Oct. 20, 2020

Filed:

Mar. 11, 2019

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

Applicant:

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

Inventors:

Naoki Tahara, Tokyo, JP;

Noriaki Nogami, Tokyo, JP;

Hiroshi Kamiga, Tokyo, JP;

Assignee:

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

Attorney:

Carmody Torrance Sandak & Hennessey LLP

Primary Examiner:

William D Young

Int. Cl.
CPC ...
B22F 1/00 (2006.01); C09D 11/30 (2014.01); C09D 7/40 (2018.01); C08K 9/04 (2006.01); B22F 9/24 (2006.01); C09D 5/24 (2006.01); C09D 11/52 (2014.01); C09D 101/28 (2006.01); H01B 1/22 (2006.01); C08K 3/08 (2006.01);
U.S. Cl.
CPC ...
B22F 1/0074 (2013.01); B22F 1/0014 (2013.01); B22F 1/0062 (2013.01); B22F 9/24 (2013.01); C08K 9/04 (2013.01); C09D 5/24 (2013.01); C09D 7/68 (2018.01); C09D 11/30 (2013.01); C09D 11/52 (2013.01); C09D 101/28 (2013.01); H01B 1/22 (2013.01); B22F 2009/245 (2013.01); B22F 2301/255 (2013.01); B22F 2302/45 (2013.01); B22F 2998/10 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01);
Abstract

A silver powder, wherein the silver powder satisfies D-IPA>D-W, where in measurement of a volume-based particle size distribution of the silver powder by a laser diffraction particle size distribution analysis, D-IPA (μm) is a cumulative 50% point of particle diameter of the silver powder when isopropyl alcohol (IPA) is used as a measurement solvent for dispersing the silver powder, and D-W (μm) is a cumulative 50% point of particle diameter of the silver powder when water is used as a measurement solvent for dispersing the silver powder, and wherein a phosphorus content in the silver powder is 0.01% by mass or more but 0.3% by mass or less.

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