Method for making a magnetic head having surface-reinforced glass
AssigneeTDK Corporation
InventorsKojiro Yagami, Chitatsu Sano, Toshiya Tamura
Life of this patent
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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 a 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.
Claims14
A method for preparing a magnetic head, comprising the steps of:
- assembling a magnetic head, said magnetic head having an exposed base glass surface, said base glass containing at least one oxide component, and
- irradiating said exposed surface of said base glass with radiation or light in an ozone atmosphere to produce a surface portion of said base glass containing more of said oxide component than the base glass, said surface portion exhibiting higher chemical or mechanical durability than the base glass itself.
Dependencies are inferred from the claim text.