Patent ID: 8536646
Filing Date: 2013-09-17
Classification: H01L

Abstract:
1. A trench type power transistor device, comprising: a semiconductor substrate of a first conductivity type, having an active region and a peripheral region, and the semiconductor substrate having at least one first trench; at least one transistor cell, disposed in the active region, and the transistor cell comprising: a gate metal layer, disposed on the semiconductor substrate in the peripheral region; a source metal layer, disposed on the semiconductor substrate in the active region; and a second gate conductive layer, disposed between the first gate conductive layer and the source metal layer, and the second gate conductive layer partially overlapping the first gate conductive layer and the source metal layer in a direction perpendicular to the semiconductor substrate, wherein the second gate conductive layer electrically connects the first gate conductive layer to the gate metal layer, and the second gate conductive layer is electrically insulated from the source metal layer and the semiconductor substrate.