公开(公告)号：SG87048A1

公开(公告)日：2002-03-19

申请号：SG1999004432

申请日：1994-11-01

Applicant: IBM

Inventor： PETER MICHAEL BAUMGART ,  WING PUN LEUNG ,  HUNG VIET NGUYEN ,  THAO ANH NGUYEN ,  ANDREW CHING TAM ,  ANTHONY WU

IPC: B23K26/00 ,  C03C23/00 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  C03 ,  C04B41/00

Abstract: A process is disclosed for creating an array of bumps to texture a brittle surface, such as a glass substrate 12 for data recording disks. The texturing process uses a laser 10 to provide pulses of proper energy fluence to the brittle glass surface to produce a plurality of raised bumps in the surface. The bump creation is accomplished without unwanted micro-cracking or ejection of surface material by limiting the laser pulse fluence to a value in a narrow operating region discovered below the abrupt thermal shock fluence threshold for the brittle surface material. The process is also applicable to other brittle surface textures, such as those intended for use as "stamping surfaces" for the contact reproduction of the negative of a surface pattern, such as an optical disk.