Surface-reinforced glass and magnetic head having surface-reinfo

Details Surface-reinforced glass and magnetic head having surface-reinfo Surface-reinforced glass and magnetic head having surface-reinfo

1990-02-01

1991-10-08

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Head surface structure

65 301, 65 608, 360103, G11B 5187

Patent

active

050559583

ABSTRACT:
Glass is surface reinforced by providing a surface layer which contains an oxide component, typically silicon oxide in more excess than the underlying base glass, the oxide component exhibiting higher chemical or mechanical durability than the base glass itself. A surface of glass is tailored by a dry process, typically by exposure to UV radiation in the presence of ozone such that the oxide component is present more at the surface than in the underlying glass while heavy metal such as Pb is driven out. A magnetic head having such a surface-reinforced sealing glass for bonding a core block to a slider is highly reliable.

REFERENCES:
patent: 3637453 (1972-01-01), Simmons
patent: 4188452 (1980-02-01), Groth
patent: 4485146 (1984-11-01), Mizuhashi
patent: 4897915 (1990-02-01), Ito
"Polymer Engineering and Science, Mar. 1972, vol. 12, No. 2 Ultraviolet Depolymerization of Photoresist Polymers" by D. A. Bolon and C. O. Kunz.
J. Vac. Sci. Technology, vol. 11, No. 1, Jan./Feb. 1974 "Surface Cleaning by Ultraviolet Radiation" by R. R. Sowell, et al.
IEEE Transactions on Parts, Hybrids, and Packaging, vol. PHP-12 No. 4, Dec. 1975, "UV/Ozone Cleaning of Surfaces" by John R. Vig and John W. LeBus.
Surface Communication, vol. 1, Plenum Press, 1979 "UV/Ozone Cleaning of Surfaces: a Review" by John R. Vig.

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