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:
Jun. 20, 2023
Filed:
May. 07, 2021
Applicant:
Hoya Corporation, Tokyo, JP;
Inventors:
Shinji Eda, Hung Yen Province, VN;
Kinobu Osakabe, Tokorozawa, JP;
Yoshitake Tanno, Akishima, JP;
Mikio Ikenishi, Akishima, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 17/02 (2006.01); G11B 17/038 (2006.01); G11B 25/04 (2006.01); G11B 33/14 (2006.01); G11B 5/73 (2006.01); G11B 17/32 (2006.01); G11B 33/12 (2006.01);
U.S. Cl.
CPC ...
G11B 17/021 (2013.01); G11B 17/038 (2013.01); G11B 25/043 (2013.01); G11B 33/1493 (2013.01); G11B 5/73921 (2019.05); G11B 17/32 (2013.01); G11B 33/125 (2013.01);
Abstract
A ring-shaped glass spacer is configured to be arranged in contact with a magnetic disk in a hard disk drive apparatus. A surface resistivity of a surface of a glass material of the glass spacer at 22 (° C.) is lower than a surface resistivity of an inner portion of the glass material at 22 (° C.).