Abstract:
Checking the layout integrity includes the steps of receiving inputs defining a plurality of devices for a layout, generating a signature for each device in the layout, when created, from one or more parameters of the device, storing the generated signatures with the layout, receiving the stored layout and signatures, regenerating each signature for each device in the stored layout, and comparing each regenerated signature with the corresponding stored signature.
Abstract:
Various particular embodiments include a method for forming a photodetector, including: forming a structure including a barrier layer disposed between a layer of doped silicon (Si) and a layer of germanium (Ge), the barrier layer including a crystallization window; and annealing the structure to convert, via the crystallization window, the Ge to a first composition of silicon germanium (SiGe) and the doped Si to a second composition of SiGe.
Abstract:
Junction field-effect transistors and design structures for a junction field-effect transistor. A source and a drain of the junction field-effect transistor are comprised of a semiconductor material grown by selective epitaxy and in direct contact with a top surface of a semiconductor layer. A gate is formed that is aligned with a channel laterally disposed in the semiconductor layer between the source and the drain. The source, the drain, and the semiconductor layer are each comprised of a second semiconductor material having an opposite conductivity type from a first semiconductor material comprising the gate.
Abstract:
Structures including a photodiode and methods of fabricating such structures. A substrate has a top surface, a well, and a trench extending from the top surface to the well. A photodiode is positioned in the trench. The photodiode includes an electrode that is provided by a first portion of the well. A bipolar junction transistor has an emitter that is positioned over the top surface of the substrate and a subcollector that is positioned below the top surface of the substrate. The subcollector is provided by a second portion of the well.
Abstract:
Structures for a heterojunction bipolar transistor and methods of fabricating such structures. A hardmask is formed that includes an opening over a first portion of a substrate in a first device region and a shape over a second portion of the substrate in a second device region. An oxidized region in the first portion of the substrate while the shape blocks oxidation of the second portion of the substrate. The oxidized region is subsequently removed from the first portion of the substrate to define a recess. A first base and a first emitter of a first heterojunction bipolar transistor are formed over the first portion of the substrate in the first device region, and a second base and a second emitter of a second heterojunction bipolar transistor are formed in the recess over the second portion of the substrate in the second device region.
Abstract:
Methods and structures for shielding optical waveguides are provided. A method includes forming a first optical waveguide core and forming a second optical waveguide core adjacent to the first optical waveguide core. The method also includes forming an insulator layer over the first optical waveguide core and the second optical waveguide core. The method further includes forming a shielding structure in the insulator layer between the first optical waveguide core and the second optical waveguide core.
Abstract:
Structures with altered crystallinity beneath semiconductor devices and methods associated with forming such structures. A semiconductor layer is implanted over a first depth range of an inert gas species to modify the crystal structure of a semiconductor material of the semiconductor layer and form a first modified region. The semiconductor layer is annealed with a first annealing process to convert the semiconductor material within the first modified region to a non-single-crystal layer. The semiconductor layer is also implanted with ions of an element over a second depth range to modify the crystal structure of the semiconductor material of the semiconductor layer and form a second modified region containing a concentration of the element. The semiconductor layer is annealed with a second annealing process to convert the semiconductor material within the second modified region to an insulator layer containing the element.
Abstract:
The present disclosure relates to a semiconductor device, and more particularly, to a junctionless/accumulation mode transistor with dynamic control and method of manufacturing. The circuit includes a channel region and a threshold voltage control on at least one side of the channel region, the threshold voltage control being configured to provide dynamic control of a voltage threshold, leakage current, and breakdown voltage of the circuit, wherein the threshold voltage control is a different dopant or material of a source region and a drain region of the circuit.
Abstract:
The present disclosure relates to semiconductor structures and, more particularly, to optical via connections in chip-to-chip transmission in a 3D chip stack structure using an optical via, and methods of manufacture. The structure has a first wafer, including a first waveguide coupled to an optical resonator in the first wafer, and a second wafer, including a second waveguide, located over the first wafer. The structure also includes an optical via extending between the optical resonator of the first wafer and the second waveguide of the second wafer to optically couple the first and second waveguides.
Abstract:
Disclosed are structures and methods of forming the structures so as to have a photodetector isolated from a substrate by stacked trench isolation regions. In one structure, a first trench isolation region is in and at the top surface of a substrate and a second trench isolation region is in the substrate below the first. A photodetector is on the substrate aligned above the first and second trench isolation regions. In another structure, a semiconductor layer is on an insulator layer and laterally surrounded by a first trench isolation region. A second trench isolation region is in and at the top surface of a substrate below the insulator layer and first trench isolation region. A photodetector is on the semiconductor layer and extends laterally onto the first trench isolation region. The stacked trench isolation regions provide sufficient isolation below the photodetector to allow for direct coupling with an off-chip optical fiber.