Patent ID: 7740729
Filing Date: 2010-06-22
Classification: G11B

Abstract:
1. A method for bonding at least two disks, the method comprising: providing a bounding structure including a positioning header with a number of members and first magnetic means, where the members, when in default positions, form a default round stand with a first diameter smaller than a second diameter; placing two disks with the second diameter on the positioning header, wherein the two disks have been already applied a layer of a type of adhesive therebetween; and causing the members to expand up to a limit by the second diameter, by magnetic effects between the first and second magnetic means when the bounding structure is moved over the second magnetic means so that a gap caused by a difference between the first diameter and the second diameter is minimized while the two disks are being bonded, thereby an eccentricity of the bonded two disks is minimized.