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. 13, 1990
Filed:
May. 26, 1989
Applicant:
Inventor:
George J Gau, Minnetonka, MN (US);
Assignee:
Magnetic Peripherals Inc., Minnetonka, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360122 ; 360126 ;
Abstract
A thin film magnetic head including top and bottom pole tips having reversed trapezoidal cross sections. Mirror image symmetry across a gap region may be achieved. The top and bottom pole tips may be formed using a photolithographic process using positive photoresist including post bake and flood exposure steps.