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. 12, 2021
Filed:
Feb. 17, 2017
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Keiichi Kimura, Tokyo, JP;
Keisuke Tokuhashi, Tokyo, JP;
Tomohiro Uno, Tokyo, JP;
Yutaka Sato, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A ceramic laminate improving the mechanical characteristics of a composite ceramic layer which has excellent thermal fatigue resistance, thermal conductivity, and insulation ability and having excellent durability and heat dissipation and insulation ability and a ceramic insulating substrate and a method of production of a ceramic laminate are provided. In a cross-section perpendicular to the bonding interfaces, the average size of the second phase particlesis 0.02 μm to 0.3 μm and the average value of the ratio of the long axis and short axis of an equivalent ellipse when viewing a second phase particleas an ellipse is 2 to 10. Further, 60% or more of the number of the second phase particleshas an orientation angle of 30° or less while the average orientation angle is 5° to 35°.