A Disk Configuration for Optical Storage
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
We have made an optical disk product which takes advantage of both polymeric and glass material properties. The basic configuration is comprised of (a) an injection molded polymethylmethacrylate (PMMA) or polycarbonate (PC) substrate (N1/8" th with smooth surfaces, (b) an acrylate layer (40 microns) on the substrate, and (c) a glass cover layer (N0.5mm) on the acrylate layer. The substrate, of course, can be coated and covered on either side. The injection molded substrate is obtained by an oscillatory injection molding process. The acrylate (2P layer) is placed on the substrate by first coating the stamper (Ni) with the acrylate and then placing the substrate over the stamper, curing (UV N366nm for 10 sec) and finally peeling apart the stamper from the acrylate layer.