Alloys or metallic compositions – Chromium base
Patent
1982-12-14
1984-04-10
Rutledge, L. Dewayne
Alloys or metallic compositions
Chromium base
C22C 2706
Patent
active
044420676
ABSTRACT:
Material for semiconductor holder in electron beam writing apparatus is disclosed. The material consists of 1.0-11.0% by weight of iron, 0.2-5.5% by weight of Manganese, 0.0001-1.0% by weight of at least one rare earth element selected from rare earth elements, and remainder of chromium and inevitable impurity, the material having magnetic susceptibility of not more than 5.times.10.sup.-5 emu/G and a thermal expansion coefficient of 0-4.0.times.10.sup.-6 /.degree. C. at a temperature of 0.degree. C.-40.degree. C.
REFERENCES:
patent: 3015559 (1962-01-01), McGurty et al.
patent: 3017265 (1962-01-01), McGurty et al.
patent: 4089711 (1978-05-01), Saito et al.
Saito Yoshinobu
Sugimoto Sakae
McDowell Robert L.
Rutledge L. Dewayne
Tohoku Tokushuko Kabushiki Kaisha
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