Browse Prior Art Database

Hub-Disk Assembly Tool

IP.com Disclosure Number: IPCOM000036276D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Husky, DS Soldberg, LF Stokowski, EJ [+details]

Abstract

As optical disk rotational speeds increase and access times decrease, the need for lower radial and axial runout has become increasingly important. In order to reduce the radial runout of an optical disk, the hub must be located such that the hub inside diameter (I.D.), same diameter that attaches to the drive spindle, is located central to the (Image Omitted) tracks or grooves with a minimum of eccentricity. Also, due to tolerance buildup of the optical disk fabrication process, it is impractical, if not impossible to guarantee a high yield of assemblies that possess a low radial and axial runout. By aligning the hub directly to the grooves, rather than the substrate I.D., any inherent eccentricity between the grooves and the substrate I.D. will have no effect on runout.