Abstract:
PROBLEM TO BE SOLVED: To provide a monolithic integrated high-voltage resistance structure having an IGBT(insulated gate bipolar transistor) device which has structural and functional characteristics capable of suppressing the occurrence of a parasitic transistor and which overcomes a limited condition and defect affecting the above conventional devices. SOLUTION: In the device in which a second conductive semiconductor layer(19) is integrated on a laminated first conductive semiconductor substrate(16) and which includes a resistance structure(17) for voltage control and an IGBT device(18), the resistance structure(17) surrounds a part(22) of the semiconductor layer(19), shows the first conductive type, and includes at least one of substantially ring-like regions(21a). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a means for reducing packaging costs by reducing a memory size when packaging a turbo code / convolution code decoder. SOLUTION: The compound turbo code / convolution code decoder utilizes again an input/output RAM of a turbo code decoding means as an alpha or beta RAM for a convolution code decoding means. Further, command units (SM and LLR) are used for both a turbo code and a convolution code. An effective hardware folding schemer calculate 256 states successively on 8 ACS unit. COPYRIGHT: (C)2004,JPO
Abstract:
The disclosure is directed to wide band-gap semiconductor devices, such as power devices based on silicon carbide or gallium nitride materials. A power device die is attached to a carrier substrate or a base using sintered silver as a die attachment material or layer. The carrier substrate is, in some embodiments, copper plated with silver. The sintered silver die attachment layer is formed by sintering silver nanoparticle paste under a very low temperature, for example, lower than 200° C. and in some embodiments at about 150° C., and with no external pressures applied in the sintering process. The silver nanoparticle is synthesized through a chemical reduction process in an organic solvent. After the reduction process has completed, the organic solvent is removed through evaporation with a flux of inert gas being injected into the solution.
Abstract:
A MEMS device (17) formed by a body (2); a cavity (25), extending above the body; mobile and fixed structures (18, 19) extending above the cavity and physically connected to the body via anchoring regions (16); and electrical-connection regions (10a, 10b, 10c), extending between the body (2) and the anchoring regions (16) and electrically connected to the mobile and fixed structures. The electrical-connection regions (10a, 10b, 10c) are formed by a conductive multilayer including a first semiconductor material layer (5), a composite layer (6) of a binary compound of the semiconductor material and of a transition metal, and a second semiconductor material layer (7).
Abstract:
An electronic device includes a silicon substrate (2) having a first side and a second side. A structural layer of gallium nitride (6) is formed over the first side of the silicon substrate and includes an active area of the electronic device. A transition layer (8) is provided between the substrate and the structural layer. The transition layer electrically and/or thermally insulated the substrate and the structural layer from one another. A via hole (20) made of a conductive material extends through the structural layer and the transition layer. The via hole is electrically and/or thermally connected to the active area of the electronic device and to the substrate.
Abstract:
The present invention relates to a method and an apparatus for manufacturing lead frames. According to the present invention, a coating layer (120) is formed on one or more predefined portions (A, B, C, D, E, F, G, H) of the surface (110s) of the substrate (100) of the lead frame (100) by delimiting the predefined portions (A, B, C, D, E, F, G, H) by means of screen printing. The employment of screen printing allows the obtainment of large amounts of lead frames with excellent electronic and structural properties in a quick and cost-effective way.