公开(公告)号：US3795534A

公开(公告)日：1974-03-05

申请号：US3795534D

申请日：1972-04-19

Applicant: RCA CORP

Inventor： MEHALSO R ,  HARRIS D

IPC: G11B3/70 ,  G03F7/16 ,  G11B7/26 ,  B44C1/20 ,  B44C5/00

CPC classification number: G03F7/162 ,  G11B7/26

Abstract: A METHOD OF FORMING A VIDEO DISC WITH A UNIFORM GROOVE RADIUS FROM A DISC HAVING GROOVES OF NONUNIFORM RADIUS AND DEPTH BY APPLYING AN EXCESS OF PHOTORESIST TO THE GROOVED DISC SURFACE WHILE ROTATING THE DISC RAPIDLY ONLY LONG ENOUGH TO DRIVE OFF THE EXCESS PHOTORESIST AND ALLOWING THE REMAINING PHOTORESIST TO DRY WHILE ROTATING THE DISC VERY SLOWLY.