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:
Aug. 31, 2004
Filed:
May. 21, 2002
Applicant:
Inventors:
Shinya Ogasawara, Moriguchi, JP;
Mitsuhisa Fujiki, Ikoma, JP;
Satoshi Yamabayashi, Hirakata, JP;
Tetsuya Okana, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B 1/00 ;
U.S. Cl.
CPC ...
B24B 1/00 ;
Abstract
A magnetic head is manufactured by grinding a head chip ( ) with a gap depth (GD ) to remove its margin ( ) until the gap depth becomes a final gap depth (GD ). The gap depth (GD ) is 25 microns or thinner. The method increases yield and productivity in the manufacture of a high performance magnetic head with a decreased gap depth (GD ), which satisfies the standards of both the gap depth (GD ) and the distance between the head gap and the outermost point of the chip front.