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:
Feb. 16, 2021
Filed:
Nov. 28, 2017
Tokuyama Corporation, Shunan, JP;
Shota Daiki, Shunan, JP;
Ryuji Ishimoto, Shunan, JP;
TOKUYAMA CORPORATION, Shunan, JP;
Abstract
A hexagonal boron nitride powder whose maximum absorption peak within the range of 3,100 to 3,800 cmof the diffuse reflectance fourier transform infrared spectrum is existent at 3,530 to 3,590 cmand which is able to provide high heat conductivity, dielectric strength and copper foil peel strength to a resin composition obtained by filling the powder into a resin, and a process for producing the above boron nitride powder by mixing together an oxygen-containing boron compound, a carbon source having a sulfur concentration of 1,000 to 10,000 ppm and an oxygen-containing calcium compound in a specific ratio and reduction nitriding the mixture.