Patent ID: 8816392
Filing Date: 2014-08-26
Classification: B82Y,H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate on an insulating layer, the semiconductor substrate comprising first opposite sides and second opposite sides; one pair of source region and a drain regions, each of which abuts a respective one of the first opposite sides; a first pair of gates, each of which is located on a respective one of the second opposite sides; and a second gate, which is embedded at least partially in the semiconductor substrate so that the second gate is surrounded by the semiconductor substrate and the bottom of the second gate is located in the semiconductor substrate, wherein, the second gate comprises: a floating gate surrounded by the semiconductor substrate, wherein a first dielectric layer is sandwiched between the floating gate and the semiconductor substrate; a control gate on the floating gate, wherein a second dielectric layer is sandwiched between the control gate and the floating gate.