Method of manufactureing a record matrix
US4190503A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Dec 22, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2017/003
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In manufacturing a record matrix from a lacquer master having a sound groove in a surface thereof, a basic reduction solution containing borohydride compound and an acidic metal salt solution containing nickel salt, ammonium salt and lactic acid are sprayed against the surface of the master having the sound groove for effecting the electroless plating thereon of a nickel surface metal layer having thereon a projection strip coincident with the sound groove, a reinforcing layer is formed over the surface metal layer and its reinforcing layer are peeled off from the lacquer master along the boundary therebetween to provide the record matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.