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:
Oct. 21, 1997
Filed:
Mar. 09, 1995
Tatsuya Hiwatashi, Kikuchi-gun, JP;
Abstract
A magnetic recording medium comprises a substrate (1,2), a magnetic film layer (4), a buffer layer (5), and a hydrogen-containing carbon film layer (6). The buffer layer (5) is made of a material whose crystal structure is bcc-structure and atomic radius is equal to or larger than 0.122 nm, or is made of a material whose crystal structure is diamond structure. The hydrogen-containing carbon film layer (6) shows a Raman spectrum (8) having two peaks at wave numbers of approximately 1550 cm.sup.-1 and 1350 cm.sup.-1 in Raman spectroscopic analysis. This Raman spectrum (8) is expressed by combination of first and second Gaussian curves (9, 10) having respective peaks at wave numbers of approximately 1550 cm.sup.-1 and 1350 cm.sup.-1. And, an integrated intensity of the second Gaussian curve (10) having its peak at the wave-number of approximately 1350 cm.sup.-1 is equal to or less than 3 times of an integrated intensity of the first Gaussian curve (9) having its peak at the wave number of approximately 1550 cm.sup.-1.