Method of maintaining electrical characteristics of electron tubes and transistors an structure therefor
United States Patent 3372733
Inventors:
Callender, Russell J.
Publication Date:
03/12/1968
Other Classes:
257/E23.084, 257/722, 165/185
International Classes:
H01J19/74; H01L23/40; H05K7/20; H01J19/00; H01L23/34