Recording disk hub bond
AssigneeMinnesota Mining and Manufacturing Company
InventorsWayne M. Hector, Cathleen M. Arsenault
Life of this patent
Estimating the term…
Abstract
A hub secured to a substrate having a recording medium with a bond layer having a thickness of less than 1 millimeter. The bond layer bonds the hub with the substrate and includes a cross-linked adhesive with a monolayer of glass spheroids dispersed within the cross-linked adhesive. The bond layer thickness is no less than the effective maximum diameter of the spheroids.
Claims10
An information carrying disk comprising
- a substrate with a recording medium thereon;
- first and second hub halves, each hub half having an annular outer surface area facing the substrate and an inner annular surface area facing the other hub half;
- a bond layer having a thickness of less than one millimeter bonding the outer annular surface area of a hub half to the substrate, the bond layer including a cross-linked adhesive and a monolayer of spheroids dispersed within the adhesive, the spheroids made of a material selected from the group consisting of aluminum, glass and other ceramics, the bond layer thickness being no less than the maximum diameter of the spheroids;
- and
- a cross-linked adhesive disposed between the inner annular surface areas of the hub halves, wherein an air space is positioned between the cross-linked adhesive and the cross-linked adhesive with spheroids and the substrate.
A method for assembling a recording disk having a hub, and a recording medium disposed on a substrate, wherein the hub includes first and second hub halves, each hub half having an annular outer surface area facing the substrate and an inner annular surface area facing the other hub half, the method comprising:
- applying a bonding layer between the outer annular surface area of each hub half and the substrate, the bonding layer including a cross-linkable adhesive and a monolayer of spheroids dispersed within the adhesive, wherein the bonding layer has a thickness of less than 1 millimeter but no less than the maximum diameter of the spheroids;
- applying a cross-linkable adhesive between the inner annular surface areas of the hub halves, wherein an air space is positioned between the cross-linkable adhesive and the cross-linkable adhesive with spheroids and the substrate;
- and curing the adhesives.
Dependencies are inferred from the claim text.