摘要:
A process for fabricating CMOS devices, featuring a channel region comprised with a strained SiGe layer, has been developed. The process features the selective growth of a composite silicon layer on the top surface of N well and P well regions. The composite silicon layer is comprised of a thin, strained SiGe layer sandwiched between selectively grown, undoped silicon layers. The content of Ge in the SiGe layer, between about 20 to 40 weight percent, allows enhanced carrier mobility to exist without creation of silicon defects. A thin silicon dioxide gate insulator is thermally grown from a top portion of the selectively grown silicon layer, located overlying the selectively grown SiGe layer.
摘要:
A strained-channel semiconductor structure and method of fabricating the same. The strained-channel semiconductor structure comprises a substrate composed of a first semiconductor material with a first natural lattice constant. A channel region is disposed in the substrate and a gate stack is disposed over the strained channel region. A pair of source/drain regions are oppositely disposed in the substrate adjacent to the channel region, wherein each of the source/drain regions comprises a lattice-mismatched zone comprising a second semiconductor material with a second natural lattice constant rather than the first natural lattice constant, an inner side and an outer side corresponding to the gate stack, and at least one outer sides laterally contacts the first semiconductor material of the substrate.
摘要:
A semiconductor device (100), including a dielectric pedestal (220) located above and integral to a substrate (110) and having first sidewalls (230), a channel region (210) located above the dielectric pedestal (220) and having second sidewalls (240), and source and drain regions (410) opposing the channel region (210) and each substantially spanning one of the second sidewalls (240). An integrated circuit (800) incorporating the semiconductor device (100) is also disclosed, as well as a method of manufacturing the semiconductor device (100).
摘要:
A strained-channel semiconductor structure and method of fabricating the same. The strained-channel semiconductor structure comprises a substrate composed of a first semiconductor material with a first natural lattice constant. A channel region is disposed in the substrate and a gate stack is disposed over the strained channel region A pair of source/drain regions are oppositely disposed in the substrate adjacent to the channel region, wherein each of the source/drain regions comprises a lattice-mismatched zone comprising a second semiconductor material with a second natural lattice constant rather than the first natural lattice constant, an inner side and an outer side corresponding to the gate stack, and at least one outer sides laterally contacts the first semiconductor material of the substrate.
摘要:
A strained-channel semiconductor structure and method of fabricating the same. The strained-channel semiconductor structure comprises a substrate composed of a first semiconductor material with a first natural lattice constant. A channel region is disposed in the substrate and a gate stack is disposed over the strained channel region A pair of source/drain regions are oppositely disposed in the substrate adjacent to the channel region, wherein each of the source/drain regions comprises a lattice-mismatched zone comprising a second semiconductor material with a second natural lattice constant rather than the first natural lattice constant, an inner side and an outer side corresponding to the gate stack, and at least one outer sides laterally contacts the first semiconductor material of the substrate.
摘要:
A CMOS integrated circuit includes a substrate having an NMOS region with a P-well and a PMOS region with an N-well. A shallow trench isolation (STI) region is formed between the NMOS and PMOS regions and a composite silicon layer comprising a strained SiGe layer is formed over said P well region and over said N well region. The composite silicon layer is disconnected at the STI region. Gate electrodes are then formed on the composite layer in the NMOS and PMOS regions.
摘要:
A strained-channel semiconductor structure and method of fabricating the same. The strained-channel semiconductor structure comprises a substrate composed of a first semiconductor material with a first natural lattice constant. A channel region is disposed in the substrate and a gate stack is disposed over the strained channel region A pair of source/drain regions are oppositely disposed in the substrate adjacent to the channel region, wherein each of the source/drain regions comprises a lattice-mismatched zone comprising a second semiconductor material with a second natural lattice constant rather than the first natural lattice constant, an inner side and an outer side corresponding to the gate stack, and at least one outer sides laterally contacts the first semiconductor material of the substrate.
摘要:
A CMOS integrated circuit includes a substrate having an NMOS region with a P-well and a PMOS region with an N-well. A shallow trench isolation (STI) region is formed between the NMOS and PMOS regions and a composite silicon layer comprising a strained SiGe layer is formed over said P well region and over said N well region. The composite silicon layer is disconnected at the STI region. Gate electrodes are then formed on the composite layer in the NMOS and PMOS regions.
摘要:
A process for fabricating CMOS devices, featuring a channel region comprised with a strained SiGe layer, has been developed. The process features the selective growth of a composite silicon layer on the top surface of N well and P well regions. The composite silicon layer is comprised of a thin, strained SiGe layer sandwiched between selectively grown, undoped silicon layers. The content of Ge in the SiGe layer, between about 20 to 40 weight percent, allows enhanced carrier mobility to exist without creation of silicon defects. A thin silicon dioxide gate insulator is thermally grown from a top portion of the selectively grown silicon layer, located overlying the selectively grown SiGe layer.
摘要:
A CMOS integrated circuit includes a substrate having an NMOS region with a P-well and a PMOS region with an N-well. A shallow trench isolation (STI) region is formed between the NMOS and PMOS regions and a composite silicon layer comprising a strained SiGe layer is formed over said P well region and over said N well region. The composite silicon layer is disconnected at the STI region. Gate electrodes are then formed on the composite layer in the NMOS and PMOS regions.