Browse Prior Art Database

Glass Substrate Disk

IP.com Disclosure Number: IPCOM000091143D
Original Publication Date: 1969-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Brezoczky, B: AUTHOR

Abstract

A magnetic disk is formed from glass substrate 10 and incorporates stainless steel or aluminum hub 12 that is mounted to the center of glass 10 in lieu of the conventional central locating hole employed in magnetic disks. Record tracks 14 are chemically etched and filled with magnetic coating material. The remaining uncoated surface is transparent and useful for measuring flying height and other characteristics of a magnetic head. Such a glass disk can be used for disk testing, head measurement, or standard data recording disks.

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Glass Substrate Disk

A magnetic disk is formed from glass substrate 10 and incorporates stainless steel or aluminum hub 12 that is mounted to the center of glass 10 in lieu of the conventional central locating hole employed in magnetic disks. Record tracks 14 are chemically etched and filled with magnetic coating material. The remaining uncoated surface is transparent and useful for measuring flying height and other characteristics of a magnetic head. Such a glass disk can be used for disk testing, head measurement, or standard data recording disks.

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