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.

Date of Patent:
Mar. 17, 1981

Filed:

Jan. 25, 1980
Applicant:
Inventors:

Barry G Koepke, Mound, MN (US);

Kelly D McHenry, Eden Praire, MN (US);

Assignee:

Honeywell Inc., Minneapolis, MN (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C04B / ; C04B / ; H01L / ;
U.S. Cl.
CPC ...
428119 ; 264 24 ; 264 61 ; 264 63 ; 264 86 ; 264175 ; 357 81 ;
Abstract

An aluminum oxide-aluminum nitride composite electronic substrate with anisotropic thermal properties is described. The aluminum nitride is in the form of needles incorporated into the aluminum oxide, the needles being oriented or aligned through the thickness of the substrate parallel to the short transverse direction of the substrate. The substrate has improved thermal conductivity in the short transverse direction and yet maintains good dielectric strength across the surface of the substrate. The improved thermal conductivity is required for heat dissipation from the micropackage assembly.


Find Patent Forward Citations

Koepke, Barry. (1981). Composite electronic substrate of alumina uniformly needled through with (U.S. Patent No. 4256792). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4256792

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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