Steel foil having excellent shielding characteristics to electro

Details Steel foil having excellent shielding characteristics to electro Steel foil having excellent shielding characteristics to electro

1988-04-22

1989-03-07

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Foil or filament smaller than 6 mils

148320, 174 35MS, H05K 900, C21D 946

Patent

active

048105899

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.

REFERENCES:
patent: 2706329 (1955-04-01), Hespenheide
patent: 3629760 (1977-12-01), Seitanakis
Brick et al., Structure and Properties of Engineering Materials, 4th Ed., McGraw-Hill, Inc., 1977, p. 13.
Krause, George, Principles of Heat Treatment of Steel, American Society for Metals, 1980, p. 178.
"Material for Magnetic and Electromagnetic Shielding", Chemical Abstracts 94:55762w, 1980.
Electronic Equipment-Jun. 1957, pp. 20-21.

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