Patent ID: 9299702
Filing Date: 2016-03-29
CPC Classification: H01L

Claim Text:
1. A transistor structure comprising: a first control gate; a semiconductor substrate doped to a first conductivity type; a first shallow halo implant region of the first conductivity type having a peak dopant concentration profile at a first depth in a portion of the substrate that is to the sides of the first control gate, the first shallow halo implant region extending only partially under the first control gate; a first deep halo implant region of the first conductivity type having a peak dopant concentration profile at a second depth in a portion of the substrate that is to the sides of the first control gate, the first deep halo implant region extending only partially under the first control gate, wherein the second depth is greater than the first depth; an epitaxial layer formed on top of the substrate and below the first control gate; and a first source region and a first drain region both of a second conductivity type and at least partially located under the epitaxial layer over the first shallow halo implant region and the first deep halo implant region and to the sides of the first control gate.