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:
Dec. 02, 1997
Filed:
Jan. 13, 1995
Applicant:
Inventors:
Brij Bihari Lal, San Jose, CA (US);
Tadashi Shinohara, Ibaraki, JP;
Assignee:
HMT Technology Corporation, Fremont, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
2041922 ; 20419215 ; 20419212 ;
Abstract
A method for forming a magnetic recording medium having a chromium underlayer and a magnetic recording layer is described. The method includes sputtering the underlayer and the magnetic layer in a single sputtering chamber from a two-region target having an inner chromium region and an outer magnetic region. Each target region is successively energized for sputter deposition of each layer.