Patent Number: 6,254,795

Title: Texture measuring method of a hard disk plate

Abstract: The present invention provides a texture measuring method of a hard disk plate. The method comprises performing a laser etching process to form a pinhole at each of a plurality of predetermined positions in a predetermined area on the hard disk plate, measuring the pinhole at each of the predetermined positions to obtain a first measurement value, performing a mechanical texturing process on the predetermined area of the hard disk plate to form circular textures on the predetermined area, and measuring the pinhole at each of the predetermined positions to obtain a second measurement value wherein the first and second measurement values are used to determine the extent of texturing performed on the predetermined area of the hard disk plate.

Inventors: Tan; An-Hung (Ping-Chen, TW), Chen; Chi-Chih (Chu-Pei, TW), Wang; Han-Ming (Hsin-Chu, TW)

Assignee: Trace Storage Technology Corp.

International Classification: B24B 1/00 (20060101); B24B 21/04 (20060101); B24B 49/02 (20060101); G11B 5/012 (20060101); G11B 5/82 (20060101); G11B 5/00 (20060101); G11B 33/10 (20060101); G11B 33/00 (20060101); B44C 001/22 (); C03C 015/00 (); C23F 001/00 (); B24B 049/00 ()

Expiration Date: 07/03/2018