Patent ID: 8173502

Claim:
A method of making a semiconductor device, the method comprising: providing a semiconductor substrate having a top surface; forming a plurality of isolation regions above the substrate; after forming the plurality of isolation regions, growing a semiconductor material from said top surface of the semiconductor substrate in a plurality of gaps formed between the plurality of isolation regions, wherein after growing the semiconductor material, a top surface of the semiconductor material is higher than a top surface of the plurality of isolation regions; filling the regions above the plurality of isolation regions with an insulating material to form a plurality of active areas of the semiconductor material above the semiconductor substrate and adjacent the isolation regions so that each active area is isolated from another active area by an isolation region, each active area having an interface at the substrate where semiconductor material of the active area touches semiconductor material of the substrate, wherein said active areas have an interface at the top surface of the substrate where said semiconductor material of the active areas touches semiconductor material of the substrate; and forming a plurality of transistors, each transistor comprising at least two doped regions disposed within the semiconductor material of an active area and an electrode disposed over the semiconductor material of that active area.