Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1994-06-08
1997-03-04
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694TP, 428694TC, 428408, 428900, 2041922, G11B 566
Patent
active
056077831
ABSTRACT:
A magnetic recording medium which includes a non-magnetic base plate, a magnetic layer disposed on the base plate, and a carbon protective layer containing hydrogen disposed on the magnetic layer. The protective film may include a plurality of layers, including a first layer having a hydrogen content lower than a hydrogen content in a second layer disposed on the first layer. Alternatively, the carbon protective film may have a hydrogen content which gradually continuously increases from a bottom surface thereof to a top surface thereof. A method is also disclosed in which a non-magnetic base plate having a magnetic layer formed thereon is sputtered in a sputtering chamber having two spaced apart gas feed pipes connected thereto, wherein the base plate is moved from the first gas feed pipe to the second gas feed pipe, and the second gas feed pipe feeds a sputtering gas at a higher flow rate than the first gas feed pipe.
REFERENCES:
patent: 5227211 (1993-07-01), Eltoukhy
patent: 5266409 (1993-11-01), Schmidt
patent: 5364690 (1994-11-01), Takahashi
patent: 5397644 (1995-03-01), Yamashita
Fuji Electric & Co., Ltd.
Kiliman Leszek
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