Information carrying discs
AssigneeMinnesota Mining and Manufacturing Company
InventorsRoger J. Anderson, Donald J. Kerfeld, Larry A. Lien
Life of this patent
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Abstract
An information carrying element comprising a substrate having adhered to at least one surface thereof a separate layer having a thickness of 1.0 to 100 microns and a circular or spiral pattern of surface variations provides a particularly useful element when said separate layer comprises an abrasion resistant polymer layer derived from 30 to 100% by weight of an epoxy-terminated silane.
Claims12
An information carrying element comprising a substrate having adhered to at least one surface thereof a separate layer having a maximum thickness of 1.0 to 100 .mu.m and a circular or spiral pattern of surface variations in the form of depressions, protuberances, and/or grooves with or without modulations, said separate layer comprising an abrasion resistant polymer layer derived from 30 to 100% by weight of an epoxy-terminated silane.
Dependencies are inferred from the claim text.