Patent ID: 9029947
Filing Date: 2015-05-12
Classification: H01L,H03K

Abstract:
1. A method of operating high voltage semiconductor device, comprising: providing the high voltage semiconductor device with a field device, and the field device comprising a first well and a second well both extending down from a surface of the substrate and formed in the substrate, and the second well adjacent to one side of the first well while the substrate at the other side of the first well; a first doping region formed in the second well and spaced apart from the first well; a conductive line electrically connected to the first doping region and across the first well region; and a conductive body positioned between the conductive line and the first well, and the conductive body insulatively under the conductive line correspondingly across the first well region, wherein the first well having a second conductive type while each of the substrate, the second well and the first doping region having a first conductive type; a first insulation layer disposed on the first well and extending to the first doping region, wherein the conductive body is positioned above the first insulation layer; and either no external voltage or a fixed voltage bias is applied to the conductive body when the HV semiconductor device is operated at a high voltage.