Assertion: point contact diode | /r/MadeOf | an n-type germanium
Facets:
Source sentences:
text: It consists of an N-type germanium or silicon wafer about 12.5 mm square by 0.5 mm thick, one face of which is soldered to a metal base by radio-frequency heating and the other face has a phosphor bronze or tung­sten spring pressed against it.