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. 09, 1998
Filed:
Dec. 26, 1996
Tatsuaki Hishida, Mishima-gun, JP;
Read-Rite SMI Corporation, Osaka, JP;
Abstract
The object of the present invention is to improve the bonding characteristics and peeling resistance of the insulating film formed on the substrate of a thin-film magnetic head. An insulating film consisting of Al.sub.2 O.sub.3 is formed by sputtering on the surface of an ALTIC substrate in which numerous recesses and projections (in which the projecting portions consist of TiC) have been formed by selectively removing the alumina portions of said substrate by etching using an RIE process. An electromagnetic transducer element circuit is then laminated on the surface of said insulating film. Since the contact area between the substrate surface and the insulating layer is increased, and especially since the contact area between the TiC and the Al.sub.2 O.sub.3 is increased due to the projection of the TiC, the bonding force between the two films is increased, and the resistance to peeling is conspicuously improved. Accordingly, the manufacturing yield is improved and the durability of the heads manufactured is also improved, so that slider miniaturization can easily be accomplished.