Abrasive tape and method for polishing magnetic heads

Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...

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51295, 51309, 428323, 428328, 428329, 428694R, 428932, 451533, 451539, B32B 516, G11B 584

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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.

REFERENCES:
patent: 4756960 (1988-07-01), Yamaguchi et al.
patent: 4762534 (1988-08-01), Ito et al.
patent: 4842618 (1989-06-01), Ito et al.
patent: 4903440 (1990-02-01), Larson et al.
patent: 4922675 (1990-05-01), Sato et al.

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