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:
Feb. 29, 2000
Filed:
Feb. 27, 1995
Takuo Tamura, Yokohama, JP;
Asao Nakano, Kamakura, JP;
Kazufumi Suenaga, Yokohama, JP;
Kiyoshi Ogata, Yokohama, JP;
Souzou Sasajima, Ibaraki-ken, JP;
Noriyuki Kumasaka, Oume, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A protective film which is close to a substrate of a magnetic head in term of thermal expansion coefficient and hardness when it is placed on a slide face of the magnetic head, and moreover is made of material which is high stability in water and enables the film to be formed at high speed. The protective film contains a region of composition CaMgSi.sub.2 O.sub.6 at least in a part thereof. Ca atom is surrounded by O atoms with the coordination number of eight, Mg is surrounded by O atoms with the coordination number of six, and Si is surrounded by O atoms with the coordination number of four in the atomic configuration in the region.