Method of manufacturing an electrostatic capacitance type information signal recording medium
US4767486A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/108
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatic capacitance type information signal recording disc comprises a laminated plate made up of a first sheet which is made from an inexpensive conductive or non-conductive material and is used as a core material and a second sheet which is made from a conductive material and is bound on at least one surface of the first sheet, and variations in geometrical configuration formed on the second sheet in accordance with information signals which are to be recorded. A method of manufacturing the disc comprises the steps of binding the second sheet on at least one surface of the first sheet so as to obtain a laminated sheet, cutting the laminated sheet into a plurality of laminated plates having a predetermined size, and compression molding the variations in geometrical configuration, in accordance with information signals which are to be recorded, on a recording part of the second sheet of each of the laminated plates supplied in succession.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.