Abstract:
Circuitry includes a floating-body main field-effect transistor (FET) device, a body-contacted cascode FET device, and biasing circuitry coupled to the floating-body main FET device and the body-contacted cascode FET device. The floating-body main FET device includes a gate contact, a drain contact, and a source contact. The body-contacted cascode FET device includes a gate contact, a drain contact coupled to a supply voltage, and a source contact coupled to the drain contact of the floating-body main FET device and to a body region of the body-contacted cascode FET device. The biasing circuitry is coupled to the gate contact of the floating-body main FET device and the gate contact of the body-contacted cascode FET device and configured to provide biasing signals to the floating-body main FET device and the body-contacted cascode FET device such that a majority of the supply voltage is provided across the body-contacted cascode FET device.
Abstract:
Radio frequency (RF) front end circuitry includes first RF multiplexer circuitry and second RF multiplexer circuitry. The first RF multiplexer circuitry is a quadplexer, while the second RF multiplexer is a triplexer. The RF front end circuitry is configured to support the transmission and reception of signals within a first operating band, a second operating band, and a third operating band. Further, the RF front end circuitry is configured to support carrier aggregation configurations between the first operating band and the third operating band and the second operating band and the third operating band.
Abstract:
A semiconductor device that does not produce nonlinearities attributed to a high resistivity silicon handle interfaced with a dielectric region of a buried oxide (BOX) layer is disclosed. The semiconductor device includes a semiconductor stack structure with a first surface and a second surface wherein the second surface is on an opposite side of the semiconductor stack structure from the first surface. At least one device terminal is included in the semiconductor stack structure and at least one electrical contact extends from the second surface and is electrically coupled to the at least one device terminal. The semiconductor stack is protected by a polymer disposed on the first surface of the semiconductor stack. The polymer has high thermal conductivity and high electrical resistivity.
Abstract:
A semiconductor device with reduced leakage current and a method of making the same is disclosed. The semiconductor device includes a substrate having a device layer, a dielectric layer, and a gate metal opening within the dielectric layer between a source contact and a gate contact. A first metal layer is disposed within the gate metal opening, and a second metal layer is disposed directly onto the second metal layer, wherein the second metal layer is oxidized and has a thickness that ranges from about 4 Angstroms to about 20 Angstroms to limit a leakage current of a total gate periphery to between around 0.1 μA/mm and around 50 μA/mm. A current carrying layer is disposed on the second metal layer. In one embodiment, the first metal layer is nickel (Ni), the second metal layer is palladium (Pd), and the current carrying layer is gold (Au).
Abstract:
A printed circuit module having a protective layer in place of a low-resistivity handle layer and methods for manufacturing the same are disclosed. The printed circuit module includes a printed circuit substrate with a thinned die attached to the printed circuit substrate. The thinned die includes at least one device layer over the printed circuit substrate and at least one deep well within the at least one device layer. A protective layer is disposed over the at least one deep well, wherein the protective layer has a thermal conductivity greater than 2 watts per meter Kelvin (W/mK) and an electrical resistivity of greater than 103 Ohm-cm.
Abstract:
The present disclosure integrates electromagnetic shielding into a wafer level fan-out packaging process. First, a mold wafer having multiple modules is provided. Each module includes a die with an I/O port and is surrounded by an inter-module area. A redistribution structure that includes a shield connected element coupled to the I/O port of each module is formed over a bottom surface of the mold wafer. The shield connected element extends laterally from the I/O port into the inter-module area for each module. Next, the mold wafer is sub-diced at each inter-module area to create a cavity. A portion of the shield connected element is then exposed through the bottom of each cavity. A shielding structure is formed over a top surface of the mold wafer and exposed faces of each cavity. The shielding structure is in contact with the shield connected element.
Abstract:
The present disclosure relates to a substrate structure with a buried dielectric layer for post-processing silicon handle elimination. The substrate structure includes a silicon handle layer, a first silicon oxide layer over the silicon handle layer, a buried dielectric layer over the first silicon oxide layer, where the buried dielectric layer is not formed from silicon oxide, a second silicon oxide layer over the buried dielectric layer, and a silicon epitaxy layer over the second silicon oxide layer. The buried dielectric layer provides extremely selective etch stop characteristics with respect to etching chemistries for silicon and silicon oxide.
Abstract:
The present disclosure relates to heterojunction bipolar transistors for improved radio frequency (RF) performance. In this regard, a heterojunction bipolar transistor includes a base, an emitter, and a collector. The base is formed over the collector such that a base-collector junction is formed between the base and the collector. The base-collector junction is configured to become forward-biased at a first turn-on voltage. The emitter is formed over the base such that a base-emitter junction is formed between the base and the emitter. The base-emitter junction is configured to become forward-biased at a second turn-on voltage, as opposed to the first turn-on voltage. Notably, the second turn-on voltage is lower than the first turn-on voltage.
Abstract:
A micro-electrical-mechanical systems (MEMS) device includes a substrate, one or more anchors formed on a first surface of the substrate, and a piezoelectric layer suspended over the first surface of the substrate by the one or more anchors. A first electrode may be provided on a first surface of the piezoelectric layer facing the first surface of the substrate, such that the first electrode is in contact with a first bimorph layer of the piezoelectric layer. A second electrode may be provided on a second surface of the piezoelectric layer opposite the first surface, such that the second electrode is in contact with a second bimorph layer of the piezoelectric layer.
Abstract:
The present disclosure relates to a semiconductor package having encapsulated dies with enhanced thermal performance. The semiconductor package includes a carrier, an etched flip chip die attached to a top surface of the carrier, a first mold compound, and a second mold compound. The etched flip chip die includes a device layer and essentially does not include a substrate. The first mold compound resides on the top surface of the carrier, surrounds the etched flip chip die, and extends beyond a top surface of the etched flip chip die to form a cavity, to which the top surface of the etched flip chip die is exposed. The second mold compound fills the cavity and is in contact with the top surface of the etched flip chip die. The second mold compound having a high thermal conductivity improves thermal performance of the etched flip chip die.