Abstract:
A tunable breakdown voltage RF MESFET and/or MOSFET and methods of manufacture are disclosed. The method includes forming a first line and a second line on an underlying gate dielectric material. The second line has a width tuned to a breakdown voltage. The method further includes forming sidewall spacers on sidewalls of the first and second line such that the space between first and second line is pinched-off by the dielectric spacers. The method further includes forming source and drain regions adjacent outer edges of the first line and the second line, and removing at least the second line to form an opening between the sidewall spacers of the second line and to expose the underlying gate dielectric material. The method further includes depositing a layer of material on the underlying gate dielectric material within the opening, and forming contacts to a gate structure and the source and drain regions.
Abstract:
Integrated optical structures include a first wafer layer, a first insulator layer directly connected to the top of the first wafer layer, a second wafer layer directly connected to the top of the first insulator layer, a second insulator layer directly connected to the top of the second wafer layer, and a third wafer layer directly connected to the top of the second insulator layer. Such structures include: a first optical waveguide positioned within the second wafer layer; an optical coupler positioned within the second wafer layer, the second insulator layer, and the third wafer layer; and a second optical waveguide positioned within the third wafer layer. The optical coupler transmits an optical beam from the first optical waveguide to the second optical waveguide through the second insulator layer.
Abstract:
In an approach to fabricating a silicon on insulator wafer, one or more semiconductor device elements are implanted and one or more shallow trench isolations are formed on a top surface of a first semiconductor wafer. A first dielectric material layer is deposited over the top surface of the first semiconductor wafer, filling the shallow trench isolations. A dielectric material layer on a bottom surface of a second semiconductor wafer is bonded to a dielectric material layer on the top of the first semiconductor wafer and one or more semiconductor devices are formed on a top surface of the second semiconductor wafer. Then, one or more through silicon vias are created connecting the one or more semiconductor devices on the top surface of the second semiconductor wafer and the one or more semiconductor device elements on the top surface of the first semiconductor wafer.
Abstract:
Fabrication methods, device structures, and design structures for a bipolar junction transistor. An intrinsic base layer is formed on a semiconductor substrate, an etch stop layer is formed on the intrinsic base layer, and an extrinsic base layer is formed on the etch stop layer. A trench is formed that penetrates through the extrinsic base layer to the etch stop layer. The trench is formed by etching the extrinsic base layer selective to the etch stop layer. The first trench is extended through the etch stop layer to the intrinsic base layer by etching the etch stop layer selective to the intrinsic base layer. After the trench is extended through the etch stop layer, an emitter is formed using the trench.
Abstract:
Fabrication methods, device structures, and design structures for a heterojunction bipolar transistor. A trench isolation region and a collector are formed in a semiconductor substrate. The collector is coextensive with the trench isolation region. A first semiconductor layer is formed that includes a of single crystal section disposed on the collector and on the trench isolation region. A second semiconductor layer is formed that includes a single crystal section disposed on the single crystal section of the first semiconductor layer and that has an outer edge that overlies the trench isolation region. The section of the first semiconductor layer has a second width greater than a first width of the collector. The section of the second semiconductor layer has a third width greater than the second width. A cavity extends laterally from the outer edge of section of the second semiconductor layer to the section of the first semiconductor layer.
Abstract:
Disclosed are bipolar devices, which incorporate an entirely monocrystalline link-up region between the intrinsic and extrinsic base layers, and methods of forming the devices. In the methods, a selective epitaxial deposition process grows monocrystalline semiconductor material for the extrinsic base layer on an exposed edge portion of a monocrystalline section of an intrinsic base layer. This deposition process is continued to intentionally overgrow the monocrystalline semiconductor material until it grows laterally and essentially covers a dielectric landing pad on a center portion of that same monocrystalline section of the intrinsic base layer. Subsequently, an opening is formed through the extrinsic base layer to the dielectric landing pad and the dielectric landing pad is selectively removed, thereby exposing monocrystalline surfaces only of the intrinsic and extrinsic base layers. A semiconductor layer is then formed by epitaxial deposition on the exposed monocrystalline surfaces, thereby forming the entirely monocrystalline link-up region.
Abstract:
Approaches for generating test cases for design rule checking are provided. A method includes extracting coordinates of an error marker in an integrated circuit design. The method also includes creating an error polygon using the coordinates. The method additionally includes selecting polygons in the design that touch the error polygon. The method further includes identifying a rectangle that encloses the selected polygons. The method also includes generating a test case based on data of the design contained within the rectangle. The extracting, the creating, the selecting, the identifying, and the generating are performed using a computer device.
Abstract:
A tunable breakdown voltage RF MESFET and/or MOSFET and methods of manufacture are disclosed. The method includes forming a first line and a second line on an underlying gate dielectric material. The second line has a width tuned to a breakdown voltage. The method further includes forming sidewall spacers on sidewalls of the first and second line such that the space between first and second line is pinched-off by the dielectric spacers. The method further includes forming source and drain regions adjacent outer edges of the first line and the second line, and removing at least the second line to form an opening between the sidewall spacers of the second line and to expose the underlying gate dielectric material. The method further includes depositing a layer of material on the underlying gate dielectric material within the opening, and forming contacts to a gate structure and the source and drain regions.
Abstract:
A tunable breakdown voltage RF MESFET and/or MOSFET and methods of manufacture are disclosed. The method includes forming a first line and a second line on an underlying gate dielectric material. The second line has a width tuned to a breakdown voltage. The method further includes forming sidewall spacers on sidewalls of the first and second line such that the space between first and second line is pinched-off by the dielectric spacers. The method further includes forming source and drain regions adjacent outer edges of the first line and the second line, and removing at least the second line to form an opening between the sidewall spacers of the second line and to expose the underlying gate dielectric material. The method further includes depositing a layer of material on the underlying gate dielectric material within the opening, and forming contacts to a gate structure and the source and drain regions.
Abstract:
Integrated optical structures include a first wafer layer, a first insulator layer directly connected to the top of the first wafer layer, a second wafer layer directly connected to the top of the first insulator layer, a second insulator layer directly connected to the top of the second wafer layer, and a third wafer layer directly connected to the top of the second insulator layer. Such structures include: a first optical waveguide positioned within the second wafer layer; an optical coupler positioned within the second wafer layer, the second insulator layer, and the third wafer layer; and a second optical waveguide positioned within the third wafer layer. The optical coupler transmits an optical beam from the first optical waveguide to the second optical waveguide through the second insulator layer.