Gregory's ServerHere's a large power transistor from the 1960s. This transistor is from the pre-silicon era; it is built from germanium instead. I cut it open to show the complex construction inside. 1/8
Ken Shirriff
1 comment
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Ken Shirriff
Here's a large power transistor from the 1960s. This transistor is from the pre-silicon era; it is built from germanium instead. I cut it open to show the complex construction inside. 1/8 1 comment
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This "alloy junction" transistor has a germanium wafer with a thick indium ring on the visible side and an indium disk underneath. The indium forms an alloy of P-type germanium. The ring is the emitter, the disk is the collector. The result is a PNP transistor. 2/8