Steel foil having excellent shielding characteristics to electromagnetic waves
US4810589A · kind A · utility
3Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12431
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An ultrathin steel foil which is suited for use as an electromagnetic wave shielding material and which is excellent in shielding properties, is provided by cold rolling to be 31% to 90% reduction and anneal at 600.degree. to 950.degree. C. for 1 hour of a steel material having specific chemical composition including C of less than 0.01% and specified grain diameter of between 20 to 80 .mu.m, and thicknesses of between 20 to 100 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.