Apparatus and method for improving center hole radial runout control in optical disk manufacturing
AssigneeThomson Licensing
InventorsDaniel Jay Sanocki, Alan Bruce Hamersley, William Garrick Lucas
Life of this patent
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Abstract
An apparatus and method for controlling radial runout between stacked disk portions (14, 18) and providing a cylindrical pin (20) having at least two diameters (22, 24). The pin is dimensioned and configured to permit the disk portions, which have different center hole dimensions, to be indexed such that a center hole of each disk portion is received by a separate diameter of the pin. The disk portions are maintained in spatial relationship as provided by the pin by spot curing a portion of the adhesive.
Claims7
A method for indexing stacked disk portions of an optical disk, comprising the steps of:
- providing a cylindrical pin having at least two fixed diameters, the pin being configured to permit the disk portions having different center hole dimensions to be indexed such that a center hole of each disk portion is received by a separate fixed diameter of the pin;
- forming an adhesive layer between disk portions, said adhesive layer extending fully to the pin;
- and
- maintaining the disk portions in a spatial relationship as provided by the pin by spot curing a full ring of a first inner portion of the adhesive layer located near the center hole, wherein the light source for spot curing is located relative to the pin to prevent curing of a full ring of a second inner portion of the adhesive layer that is adjacent to both the pin and the first inner portion of the adhesive layer.
Dependencies are inferred from the claim text.