Abstract
The work reports the development of a 4×4 mm-area TIL GTO switch with a maximum controllable anode current IATO = 45 A, which exceeds by 80% the peak reported value in the literature for this class of GTOs. The maximum turn-off gain obtainable in the vicinity of IATO is Koff = 17. The mechanisms underlying this drastic boost of IATO and the broad implications of reported results are outlined in the letter.

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