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:
A micro-electro-mechanical system (MEMS), methods of forming the MEMS and design structures are provided. The method includes forming a coplanar waveguide (CPW) comprising a signal electrode and a pair of electrodes on a substrate. The method includes forming a first sacrificial material over the CPW, and a wiring layer over the first sacrificial material and above the CPW. The method includes forming a second sacrificial material layer over the wiring layer, and forming insulator material about the first sacrificial material and the second sacrificial material. The method includes forming at least one vent hole in the insulator material to expose portions of the second sacrificial material, and removing the first and second sacrificial material through the vent hole to form a cavity structure about the wiring layer and which exposes the signal line and pair of electrodes below the wiring layer. The vent hole is sealed with sealing material.
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 field effect transistor (FET) with an underlying airgap and methods of manufacture are disclosed. The method includes forming an amorphous layer at a predetermined depth of a substrate. The method further includes forming an airgap in the substrate under the amorphous layer. The method further includes forming a completely isolated transistor in an active region of the substrate, above the amorphous layer and the airgap.
Abstract:
A method of making a semiconductor structure includes forming a trench through a shallow trench isolation (STI) structure and into a substrate, and forming a liner including an electrical insulator material on sidewalls of the trench. The method also includes forming a core including a high thermal conductivity material in the trench and on the liner, and forming a cap in the trench and on the core.
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 field effect transistor (FET) with an underlying airgap and methods of manufacture are disclosed. The method includes forming an amorphous layer at a predetermined depth of a substrate. The method further includes forming an airgap in the substrate under the amorphous layer. The method further includes forming a completely isolated transistor in an active region of the substrate, above the amorphous layer and the airgap.
Abstract:
Lateral PiN diodes and Schottky diodes with low parasitic capacitance and variable breakdown voltage structures and methods of manufacture are disclosed. The structure includes a diode with breakdown voltage determined by a dimension between p- and n-terminals formed in an i-region above a substrate.
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:
Si waveguide devices on a bulk Si substrate with supporting anchors and methods of manufacture are disclosed. The method includes forming a waveguide device over an Si substrate, and forming one or more anchors from the Si substrate. The one or more anchors support the waveguide device.