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. 11, 1992
Filed:
Oct. 10, 1990
Applicant:
Inventors:
Nobuaki Onagi, Saitama, JP;
Shinichiro Suzuki, Saitama, JP;
Seiro Fujii, Saitama, JP;
Takahiro Kobayashi, Saitama, JP;
Takamasa Yoshikawa, Saitama, JP;
Masayasu Yamaguchi, Saitama, JP;
Kiyohide Ogasawara, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
2041922 ; 20419216 ; 20419222 ; 20419226 ; 428694 ; 428698 ;
Abstract
A magneto-optical recording disk comprises a transparent substrate on which a magneto-optical recording layer made of a rare earth-transition metal alloy having an uniaxial magnetic anisotropy is sandwiched by a pair of dielectric layers is characterized that the dielectric layers are deposited in an amorphous state by means of a low pressure sputtering method.