摘要:
A two-terminal barrier controlled TVS diode has a depletion region barrier blocking majority carrier flow through the channel region at the vicinity of the cathode region at bias levels below the predetermined clamping voltage applied between the anode electrode and the cathode electrode, and may be arranged such that the anode region provides conductivity modulation by injecting minority carriers into the channel region during conduction of the semiconductor structure. In presently preferred form the majority carriers are electrons and the minority carriers are holes. Fabrication methods are described.
摘要:
A two-terminal barrier controlled TVS diode has a depletion region barrier blocking majority carrier flow through the channel region at the vicinity of the cathode region at bias levels below the predetermined clamping voltage applied between the anode electrode and the cathode electrode, and may be arranged such that the anode region provides conductivity modulation by injecting minority carriers into the channel region during conduction of the semiconductor structure. In presently preferred form the majority carriers are electrons and the minority carriers are holes. Fabrication methods are described.
摘要:
Methods and apparatuses for providing hardware acceleration of a web browser are disclosed. In one embodiment, a method of operating a web browser on a computer system includes analyzing a data stream having a plurality of fragments. The method further includes determining what fragments of the data stream should be rendered for storage into separate backing stores. The method further includes rendering the fragments into raster images intended for hardware acceleration. The method further includes storing the raster images in the backing stores located in a graphics processing unit.
摘要:
A MOSFET device design is provided that effectively addresses the problems arising from the parasitic bipolar transistor that is intrinsic to the device. The MOSFET device comprises: (a) a body region; (b) a plurality of body contact regions; (c) a plurality of source regions; (d) a plurality of drain regions; and (d) a gate region. In plan view, the source regions and the drain regions are arranged in orthogonal rows and columns, and at least a portion of the body contact regions are bordered by four of the source and drain regions, preferably two source regions and two drain regions.
摘要:
The disclosed embodiments provide a system that performs a print job. During operation, the system obtains one or more available media attributes, including a media size, a border size, and/or a media type, from a printer associated with the print job. Next, the system provides the available media attributes to an application and uses the application to automatically generate and format print data for the print job based on the available media attributes. Finally, the system sends the print job to the printer, where the print job is executed using the printer.
摘要:
A method for making a semiconductor device which may include providing a substrate having a plurality of spaced apart superlattices therein, and forming source and drain regions in the substrate defining a channel region therebetween and with the plurality of spaced apart superlattices in the channel and/or drain regions. Each superlattice may include a plurality of stacked groups of layers, with each group including a plurality of stacked base semiconductor monolayers defining a base semiconductor portion and at least one nonsemiconductor monolayer thereon. Moreover, the at least one non-semiconductor monolayer may be constrained within a crystal lattice of adjacent base semiconductor portions.
摘要:
A power MOSFET is provided that includes a substrate of a first conductivity type. An epitaxial layer also of the first conductivity type is deposited on the substrate. First and second body regions are located in the epitaxial layer and define a drift region between them. The body regions have a second conductivity type. First and second source regions of the first conductivity type are respectively located in the first and second body regions. A plurality of trenches are located below the body regions in the drift region of the epitaxial layer. The trenches, which extend toward the substrate from the first and second body regions, are filled with an epitaxially layered material that includes a dopant of the second conductivity type. The dopant is diffused from the trenches into portions of the epitaxial layer adjacent the trenches.
摘要:
A multilayer color-sensing photodetector is fabricated in a semiconductor wafer having a single crystal structure to form a first, second and third layer of single crystal semiconductor material. A dielectric layer is formed that completely surrounds each single crystal region. A blocking layer is applied to prevent ion implantation where not desired. Ions are implanted into a predefined implant area. The semiconductor wafer is heated to create a dielectric layer part way through the single crystal semiconductor region. The second layer of single crystal semiconductor materials is formed by depositing a single crystal or polycrystalline material and annealing it to form a single crystal semiconductor. The deposited semiconductor layer is masked and etched to obtain single crystal regions directly above the previous layer. A blocking layer is applied and an ion implant is performed. After heating, there is left a region of single crystal silicon that has its sides and bottom surrounding by a dielectric border. The third layer of semiconductor material is likewise deposited and processed to form a top layer of single crystal semiconductor material.
摘要:
A released beam structure fabricated in trench and manufacturing method thereof are provided herein. One embodiment of a released beam structure according to the present invention comprises a semiconductor substrate, a trench, a first conducting layer, and a beam. The trench extends into the semiconductor substrate and has walls. The first conducting layer is positioned over the walls of the trench at selected locations. The beam is positioned with the trench and is connected at a first portion thereof to the semiconductor substrate and movable at a second portion thereof. The second portion of the beam is spaced from the walls of the trench by a selected distance. Therefore, the second portion of the beam is free to move in a plane that is perpendicular or parallel to the surface of the substrate, and could be deflected to electrically contact with the walls of the trench in response to a predetermined acceleration force or a predetermined temperature variation applied on the beam structure. Other beam structures such as a beam held at both ends, or a beam held in the middle are also possible. Several beam structures at different angles can be fabricated simultaneously and mechanical etching stops are automatically formed to prevent unwanted overstress conditions when manufacturing several beam structures at the same time. Beam structures can also be manufactured in three orthogonal directions, providing information on acceleration in any direction.
摘要:
A method of manufacturing a semiconductor device is disclosed and starts with a semiconductor substrate having a heavily doped N region at the bottom main surface and having a lightly doped N region at the top main surface. There are a plurality of trenches in the substrate, with each trench having a first extending portion extending from the top main surface towards the heavily doped region. Each trench has two sidewall surfaces in parallel alignment with each other. A blocking layer is formed on the sidewalls and the bottom of each trench. Then a P type dopant is obliquely implanted into the sidewall surfaces to form P type doped regions. The blocking layer is then removed. The bottom of the trenches is then etched to remove any implanted P type dopants. The implants are diffused and the trenches are filled.