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, 1995
Filed:
Jun. 21, 1994
Applicant:
Inventor:
Osamu Hirata, Hyogo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
216 22 ; 437229 ; 216 67 ;
Abstract
After forming a magnetic material contained layer on a substrate, a etching region of the magnetic material contained layer is scanned by a magnetic head, to arrange magnetic polarization in one direction. The magnetic material contained layer is separated into a ferro magnetic region which magnetic polarization is arranged in one direction, and a feeble magnetic region which magnetic polarization is not arranged in one direction. Thereafter, the ferro magnetic region is removed by use of a difference between etching rates caused by density of the magnetic fields of these two regions.