Patent ID: 7863710

Claim:
An apparatus, comprising: a non-polar off-oriented silicon substrate, the substrate comprising a resistivity between about 1 Î©-cm to 50 Î©-cm, and the substrate comprising material of a (100) direction off-cut in a range between about 2 degrees to 8 degrees towards a (110) direction; a buffer film comprising InP, InAs, GaAs, AsP, InGaAs, InGaAsP, or combinations thereof epitaxially coupled to the substrate, the buffer film melted by pulsed-laser irradiation and recrystallized to substantially remove dislocations or defects, or combinations thereof, from the buffer film, the buffer film comprising a thickness of about 0.3 micron to about 1 micron, and the laser pulse irradiation comprising a pulse width between about 3 nanoseconds to 300 nanoseconds, a frequency between about 2 Hz to 5 Hz, and an energy between about 0.1 J/cm 2 to 7 J/cm 2 ; a first semiconductor film epitaxially grown on the buffer film, the first semiconductor film comprising Ge, A 1 Sb, or InAlAs, or combinations thereof, the first semiconductor comprising a lattice having a lattice mismatch between a lattice of the substrate, the lattice mismatch is greater than about 3%, and the buffer film providing stress relaxation between at least the substrate and the first semiconductor film; and a second semiconductor film epitaxially grown on the first semiconductor film, the second semiconductor film comprising Si, InGaAs, InAs, or InSb, or combinations thereof, the first semiconductor film and the second semiconductor film forming a quantum-well heterostructure channel material for a transistor device.