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.:
Date of Patent:
Oct. 24, 2017
Filed:
Oct. 02, 2013
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Toshiaki Terao, Ehime, JP;
Yuji Kawakami, Ehime, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
Provided is a silver powder which has an appropriate viscosity range at the time of paste production, can be easily kneaded, and prevents the occurrence of flakes. The silver powder to be used has a specific surface area ratio SA/SAof 0.5 to 0.9, wherein SAis a specific surface area measured by the BET method, and SAis a specific surface area calculated from a mean primary-particle diameter Dmeasured with a scanning electron microscope. Furthermore, the silver powder preferably has a degree of aggregation of 1.5 to 5.0, the degree being obtained in such a manner that a volume median diameter Dmeasured by laser diffraction scattering is divided by the foregoing Ds.