Grooved magnetic substrates and method for producing the same

Details Grooved magnetic substrates and method for producing the same Grooved magnetic substrates and method for producing the same

1984-05-04

1987-01-13

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

29603, 65 36, 427129, 428163, 428336, 4283126, 4283173, 4283184, 428432, 428433, 428694, 428900, G11B 542

Patent

active

046364200

ABSTRACT:
A grooved magnetic substrate for thin film magnetic heads having grooves filled with glass having substantially no pores therein and an interdiffusion layer between substrate and glass of 5 microns or less. The substrate is produced by hot-filling the groove with glass at a viscosity of 10.sup.6 -10.sup.8 poise and subjecting the substrate to hot isostatic pressure at 10.sup.6 poise or higher to define a definite apex point to define the gap depth.

REFERENCES:
patent: 3375575 (1968-04-01), Visser
patent: 3605258 (1971-09-01), Fisher
patent: 3795954 (1974-03-01), Alex
patent: 4048714 (1977-09-01), Huntt
patent: 4182643 (1980-01-01), Calderon
patent: 4188247 (1980-02-01), Ridgeway
patent: 4238215 (1980-12-01), Yokoyama
patent: 4316228 (1982-02-01), Fujiwara
patent: 4351104 (1982-09-01), Klagune

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