Title:
METHOD FOR EVALUATING FILM QUALITY OF CARBON FILM AND MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3218864
Kind Code:
B2
Abstract:
PURPOSE: To obtain a magnetic recording medium excellent in wear resistance and CSS resistance by using a carbon film having ≥2 as the value of intensity ratio B/A (Raman intensity ratio of fluorescence) as a film quality evaluation index as a protective film.
CONSTITUTION: The specific resistance of a film is known as a film quality evaluation index of a protective film 4 with respect to compsn. When the correlation between the specific resistance and B/A is examined, a clear correlation of 1:1 is recognized and specific resistance is regulated to a proper range of about ≥108Ω-cm so as to ensure satisfactory wear resistance. The wear resistance of a DLC protective film can easily be evaluated by measuring the Raman spectrum of the film and calculating B/A value. The objective magnetic recording medium excellent in wear resistance and CSS resistance is obtd. by controlling the film quality of a protective film so that the B/A value is set within a proper range.
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Inventors:
Masahiko Yokouchi
Application Number:
JP13974994A
Publication Date:
October 15, 2001
Filing Date:
June 22, 1994
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
G11B5/72; G11B5/84; (IPC1-7): G11B5/72; G11B5/84
Domestic Patent References:
| JP6138035A | ||||
| JP271422A | ||||
| JP581660A | ||||
| JP6111287A | ||||
| JP5174369A | ||||
| JP229919A | ||||
| JP712714A | ||||
| JP5174369A | ||||
| JP5174368A | ||||
| JP6349055A | ||||
| JP7192254A | ||||
| JP785462A | ||||
| JP76354A | ||||
| JP6267063A |
Attorney, Agent or Firm:
Masaharu Shinobe