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:
Jan. 27, 2026
Filed:
Dec. 16, 2020
Applicant:
Ube Corporation, Ube, JP;
Inventors:
Assignee:
UBE Corporation, Ube, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 32/21 (2017.01); B22F 1/12 (2022.01); C09K 5/14 (2006.01); H01L 23/373 (2006.01);
U.S. Cl.
CPC ...
C01B 32/21 (2017.08); B22F 1/12 (2022.01); C09K 5/14 (2013.01); C01P 2004/03 (2013.01); C01P 2004/20 (2013.01); C01P 2004/61 (2013.01); C01P 2006/32 (2013.01); H01L 23/3733 (2013.01);
Abstract
A graphite-copper composite material that includes a copper layer having an average thickness of 15 μm or less and scaly graphite particles laminated with the copper layer interposed therebetween. The graphite-copper composite material has a copper volume fraction of 3 to 20%. The graphite-copper composite material further has: (A) copper crystal grains of the copper layer having an average grain size of 2.8 μm or less, a mass fraction of Al of less than 0.02%, and a mass fraction of Si of less than 0.04%, or (B) an interfacial gap of the copper layer and the scaly graphite particles of 150 nm or less.