Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1993-09-22

1996-10-08

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428408, 428446, 428684TS, 428694TP, 428694TC, 428900, G11B 566, B32B 516

Patent

active

055629822

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.

REFERENCES:
patent: 4749608 (1988-06-01), Nakayama
patent: 4892789 (1990-01-01), Nakayama
patent: 5030494 (1991-07-01), Ahlert
patent: 5045165 (1991-09-01), Yamashita
patent: 5266409 (1993-11-01), Schmidt
patent: 5275850 (1994-01-01), Kitoh
patent: 5397644 (1995-03-01), Yamashita

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