Origins of the pn junction

Michael Riordan, Lillian Hoddeson

Research output: Contribution to journalArticlepeer-review


Russel Ohl, the inventor of the pn junction in semiconductors, is featured. Two decisive events in semiconductor technology are chronicled, first is Russel Ohl's discovery of pn junction in the 1940s, and Gordon Moore's prophecy in 1965, of exponential growth in IC complexity.

Original languageEnglish (US)
Pages (from-to)46-51
Number of pages6
JournalIEEE Spectrum
Issue number6
StatePublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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