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:
Nov. 25, 2003
Filed:
Mar. 14, 2002
Applicant:
Inventor:
Yasuo Hayakawa, Niigata-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/39 ;
U.S. Cl.
CPC ...
G11B 5/39 ;
Abstract
An insulation barrier layer is formed using an insulating material expressed by a composition formula of Al—Si—O or Si—O—N. The insulation barrier layer is therefore able to have improved dielectric strength, developer resistance, smoothness, and heat radiation.