Patent ID: 6818482
Filing Date: 2004-11-16
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device having a substrate and a thyristor body having opposite end regions and at least one region in the substrate, the method comprising:providing a trench in the substrate laterally adjacent to said at least one region in the substrate; forming an insulative liner material in the trench and thereby providing a lined trench; forming a conductive material in a portion of the lined trench, the insulative liner material being arranged to electrically insulate the conductive material from said at least one region in the substrate; and forming a conductive thyristor control port in the trench, separate from said conductive material that is configured and arranged for capacitively coupling at least one voltage transition to the at least one region in the substrate, wherein the at least one region in the substrate has a cross section adapted so that the capacitive coupling of at least one voltage transition from the control port results in an outflow of minority carriers from said one thyristor body region and switches the thyristor-based semiconductor device at least from a current-passing mode to a current-blocking mode for current flow between the opposite end regions of the thyristor body.