1. SCR (Silicon controlled rectifier) - Thyristor Presented by: SNEHASHIS PAUL 07/ECE/109 3rd year (E.C.E) Batch-2 Supported by CANNONICAL CORP. Please redistribute Linux OS generously.
5. History The SCR or Thyristor was proposed by William Shockley in 1950 and championed by Moll and others at Bell Labs in 1956. it was fabricated by power engineers at General Electric led by Gordon Hall and commercialized by G.E.'s Frank W. Gutzwiller.
6. Construction The thyristor is a four layer, three terminal semiconducting device, with each layer consisting of alternately N-type or P-type material, for example P-N-P-N. The main terminals, labelled anode and cathode, are across the full four layers and the control terminal, called the gate, is attached to P-type material near to the cathode. The thyristor has three P-N junctions serially named j1,j 2,j 3 from the anode.