Patent ID: 9166037
Filing Date: 2015-10-20
Classification: H01L

Abstract:
1. A power semiconductor device with an electrostatic discharge structure, comprising: a semiconductor substrate, having a first conductive type, wherein the semiconductor substrate comprises a first component region and a second component region, an upper surface of the semiconductor substrate has a plurality of first trenches, and the plurality of first trenches are disposed in the second component region; a plurality of first electrostatic discharge devices, each first electrostatic discharge device being embedded in the semiconductor substrate between any two of the plurality of first trenches adjacent to each other, and each first electrostatic discharge device comprising: at least one trench type transistor device, disposed in the first component region, the at least one trench type transistor device comprising a gate electrode, a source electrode, and a drain electrode, wherein one of the second doped regions closest to the first component regions furthest from the first component region is electrically connected to the drain electrode, and the plurality of first electrostatic discharge devices are electrically connected in series between the gate electrode and drain electrode; an insulating layer, covering a wall of each first trench; and a conductive layer, disposed in each first trench, wherein the second doped region and the third doped region of each first electrostatic discharge device are electrically connected to the conductive layer disposed in the any two of the plurality of first trenches respectively, and any two of the first electrostatic discharge devices adjacent to each other are electrically connected to the conductive layer disposed in one of the plurality of first trenches disposed between the any two of the first electrostatic discharge devices.