Patent ID: 8722470

Claim:
An integrated circuit fabrication apparatus configured to fabricate an integrated circuit with at least one p-Fin FET device and at least one n-FinFET device, the integrated circuit fabrication apparatus comprising: a bonding control processor configured to form a substrate comprising a first layer and a second layer, wherein forming the substrate comprises bonding the first layer having a first crystalline orientation to the second layer having a second crystalline orientation that is different from the first crystalline orientation, where the first layer is situated above a top surface of the second layer; a material growth processor configured to form, in a region of a surface of the first layer, a volume of material extending through the first layer from the second layer up to the surface of the first layer, wherein the material has a crystalline orientation that substantially matches the crystalline orientation of the second layer; an etching processor configured to selectively etch areas of the surface of the first layer that are outside of the region to create a first plurality of fins and areas inside the region to create a second plurality of fins, wherein the first and second plurality of fins are parallel to each other, and wherein the etching stops at the top surface of the second layer of the substrate; and at least one processor configured to: form a spacer around each fin in the first plurality of fins and second plurality of fins, wherein a bottom portion of the spacer contacts the top surface of the second layer; recess a set of regions of the second layer between each fin in the first plurality of fins and the second plurality of fins to form a base with exposed sidewalls under each fin in the first plurality of fins and the second plurality of fins; and oxidize the base under each fin and a set of exposed regions between each fin, the oxidizing forming an isolation layer between and under each fin in the first plurality of fins and the second plurality of fins, wherein oxide formed under each fin is thicker than oxide formed in the set of exposed regions.