Technology20th century (1947)United Stateshigh confidence

The first transistor was made using germanium rather than silicon.

Notes on verification

Well-documented historical fact corroborated by Nobel Prize archives, Computer History Museum, and standard semiconductor history references. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.77 clusters=2 claim_tier=everyday | kind=empirical eligibility=high]

Sources