Category:Alloy junction transistors
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English: en:Alloy junction transistors were an early construction technique for bipolare transistors. A germanium substrate formed the central base and (for a PNP transistor) pellets of indium were attached to each surface. These diffused into the base, forming p-type germanium and thus the emitter and collector.
This category has the following 3 subcategories, out of 3 total.