Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1993-05-05
1995-02-07
Nakarani, D. S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
51295, 51309, 428323, 428328, 428329, 428694R, 428932, 451533, 451539, B32B 516, G11B 584
Patent
active
053874579
ABSTRACT:
An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains and a binder. The abrasive grains comprise first abrasive grains, which have a mean grain diameter falling within the range of 0.07 .mu.m to 0.40 .mu.m and a Mohs hardness falling within the range of 5 to 7, second abrasive grains, which have a mean grain diameter falling within the range of 0.20 .mu.m to 0.60 .mu.m and a Mohs hardness not lower than 8.5, and fine diamond grains, which have a mean grain diameter falling within the range of 0.5 .mu.m to 3.0 .mu.m. The abrasive tape is used during a polishing process on a laminated type of magnetic head, which is constituted of a nonmagnetic substrate, a magnetic material, and a glass bonding agent. The abrasive tape is suitable for the polishing of magnetic heads, which are to be used for high-density recording with the shortest recording wavelengths of approximately 0.8 .mu.m, and has a high polishing performance.
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Fuji Photo Film Co. , Ltd.
Nakarani D. S.
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