Patent ID: 8698247
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate, having a first conductive type, and the substrate having a high-voltage region and a low-voltage region; a first deep well, disposed in the substrate in the high-voltage region, and the first deep well having a second conductive type different from the first conductive type; a first high-voltage well, disposed in the substrate between the high-voltage region and the low-voltage region, and the first high-voltage well having the first conductive type; a first doped region, disposed in the first high-voltage well, and having the second conductive type, wherein the first doped region and the first high-voltage well are electrically connected to a ground, and the first deep well, the substrate, the first high-voltage well and the first doped region constitute a bipolar junction transistor (BJT); at least one high-voltage metal-oxide-semiconductor (HV MOS) transistor, disposed in the high-voltage region, and the HV MOS transistor having a drain electrically connected to a high-voltage input pad provided with a voltage; and a low voltage MOS transistor, disposed in the low voltage region and operated in a voltage range smaller than the voltage.