Patent ID: 7682546
Filing Date: 2010-03-23
Classification: G11B,Y10S

Abstract:
1. A method, comprising: providing a disk having a substantially circular opening defined by an inner diameter (ID); providing a die set having an upper portion and a lower portion, the upper portion having a first air-bearing mandrel moveably coupled thereto, the lower portion having an imprinting surface disposed thereon and facing the upper portion; passively aligning the imprinting surface with the disk by freely guiding a first centerline of the disk into coincident alignment with a second centerline of the imprinting surface using the first air-bearing mandrel, wherein an axial movement of the first air-bearing mandrel relative to the upper portion guides the ID and the first centerline of the disk into coincident alignment with the second centerline of the imprinting surface; and imprinting the disk with the imprinting surface.