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:
Jul. 13, 1993
Filed:
Mar. 05, 1991
Applicant:
Inventors:
Atef H Eltoukhy, Saratoga, CA (US);
Yassin Mehmandoust, Berkeley, CA (US);
Assignee:
HMT Technology Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428336 ; 428408 ; 428422 ; 4286 / ; 428900 ; 4286 / ; 428667 ;
Abstract
A thin film magnetic disc having a carbon overcoat which is characterized by (a) a thickness of less than about 500 .ANG. and (b) surface nitrogen atoms having a nitrogen (1s) electron principle binding energy, as determined by electron spectroscopy for chemical analysis (ESCA), of about 399.4 eV. The nitrogen atoms enhance lubricant adhesion to the overcoat. In a preferred embodiment, the overcoat is formed by sputtering under an argon/hydrocarbon/nitrogen gas atmosphere to produce long resistance-to-erosion times, and high lubricity properties.