Disc having substrate, intermediate layer and magnetically sensitive layer wherein intermediate layer has melting point less than annealing temperature of substrate but higher than processing temperature of magnetically sensitive layer
US4254189A · kind A · utility
26Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Jul 5, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12847
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A structure and method for manufacturing said structure are disclosed for producing a surface of improved smoothness. The result is achieved by applying to the substrate a layer of low melting point metal or low melting point glass and elevating the composite structure to the melting point of said low melting point metal or low melting point glass. The said metal or glass thereupon spreads to a smooth surface of greatly improved roughness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.