Patent ID: 6949797
Filing Date: 2005-09-27
Classification: H01L

Abstract:
1. A semiconductor structure comprising a substrate; a source region formed in the substrate; a drain region formed in the substrate, the drain region having a first drain portion with a first doping concentration and a second drain portion with a second doping concentration, which is lower than the first doping concentration; a drain contact in contact with the first drain portion; a channel region between the source region and the second drain portion, the channel region bordering on the source region and on the second drain portion; a gate above the channel region; and a conductive field plate laterally spaced apart from the junction between the channel region and the second drain portion and disposed across the junction between the first drain portion and the second drain portion to reduce a gradient of the electric field at the junction, the field plate being disposed at a distance from the gate and the drain contact.