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:
Nov. 10, 1998
Filed:
Mar. 30, 1995
Applicant:
Inventor:
Andrew D Dubner, St. Paul, MN (US);
Assignee:
Imation Corp., St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
346 744 ;
Abstract
A magneto-optic (MO) recording medium having three MO layers having a combined thickness of about 60-100 nm and having a reflectivity of 18-24%. Two dielectric layers are provided between a substrate and the MO layers. The index of refraction (n) of the dielectric layer nearer the substrate is greater than that of the other dielectric layer. Preferred dielectrics for the two layers include silicon carbide (n.congruent.3) and silicon nitride (n.congruent.2).