Patent ID: 7521735

Claim:
An integrated circuit chip, comprising: a first crystalline semiconductor layer and a second crystalline semiconductor layer; an insulating layer bonding a bottom surface of said first crystalline semiconductor layer to a top surface of said second crystalline semiconductor layer, a first crystal direction of said first crystalline semiconductor layer aligned relative to a second crystal direction of said second crystalline semiconductor layer, said first crystal direction different from said second crystal direction; a field effect transistor comprising a source region, a drain region and a channel region separating said source and drain regions, said source, drain and a channel regions formed in said first crystalline semiconductor layer, a lengthwise direction of said channel extending between said source and drain regions aligned with both said first and said second directions; wherein said integrated circuit chip includes first and second opposite and parallel sides and third and fourth opposite and parallel sides, said first and second sides perpendicular to said third and fourth sides, crystal said first and second sides aligned with said first direction and said third crystal and fourth sides aligned to said second direction; and wherein said first and second crystalline semiconductor layers each comprise {100} silicon and said first crystal direction is a [100] direction and said second crystal direction is a [110] direction.