Abstract:
A semiconductor device according to the present invention is a semiconductor device for driving and controlling a power device in the high-potential side of two power devices connected in series between a main power source potential of a high potential and a main power source potential of a low potential, and is equipped with a pulse generating circuit for generating first and second pulse signals corresponding to the level transition to first and second states of input signals having a first state showing the conduction of the power device in the high-potential side and a second state showing the non-conduction of the power device in the high-potential side, respectively; a level shift circuit for obtaining first and second level-shifted pulse signals by level-shifting the first and second pulse signals to the high-potential side; an SR-type flip-flop circuit inputting the first level-shifted pulse signals from set input terminal and the second level-shifted pulse signals from reset input terminal; and a delay circuit for delaying the output of the SR-type flip-flop circuit by at least the pulse width of the first and second pulse signals.
Abstract:
A polishing composition of the present invention, to be used in polishing for forming wiring in a semiconductor device, includes: a specific surfactant; a silicon oxide; at least one selected from the group consisting of carboxylic acid and alpha-amino acid; a corrosion inhibitor; an oxidant; and water. This polishing composition is capable of suppressing the occurrence of the dishing.
Abstract:
A device to reform a raw material gas into a synthesis gas rich in hydrogen and carbon monoxide is disclosed. The device includes a vessel, a floating head, a plurality of reaction tubes, inlets and outlets for raw material and heating gases, and a cooled fixed tube plate.
Abstract:
A polishing composition contains a deterioration inhibitor for inhibiting deterioration of polishing capability of the polishing composition, an abrasive, and water. The deterioration inhibitor is at least one selected from polysaccharide and polyvinyl alcohol. The polysaccharide is starch, amylopectin, glycogen, cellulose, pectin, hemicellulose, pullulan, or elsinan. Among them, pullulan is preferable. The abrasive is at least one selected from aluminum oxide and silicon dioxide, preferably at least one selected from fumed silica, fumed alumina, and colloidal silica. The polishing composition can be suitably used in polishing for forming wiring a semiconductor device.
Abstract:
A polishing composition comprising the following components (a) to (g): (a) an abrasive which is at least one member selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, zirconium oxide and titanium oxide, (b) a polyalkyleneimine, (c) at least one member selected from the group consisting of guinaldic acid and its derivatives, (d) at least one member selected from the group consisting of glycine, α-alanine, histidine and their derivatives, (e) at least one member selected from the group consisting of benzotriazole and its derivatives, (f) hydrogen peroxide, and (g) water.
Abstract:
A polishing composition for polishing a semiconductor device having at least a tungsten film and an insulating film, which comprises the following components (a) to (d): (a) silicon dioxide, (b) periodic acid, (c) at least one pH controlling agent selected from the group consisting of ammonia, potassium hydroxide, sodium hydroxide, ammonium periodate, potassium periodate and sodium periodate, and (d) water.
Abstract:
A polishing composition comprising: (a) at least one abrasive selected from the group consisting of silicon dioxide and aluminum oxide, (b) at least one organic compound selected from the group consisting of a polyethylene oxide, a polypropylene oxide, a polyoxyethylene alkyl ether, a polyoxypropylene alkyl ether, a polyoxyethylenepolyoxypropylene alkyl ether and a polyoxyalkylene addition polymer having a C≡C triple bond, represented by the formula (1): wherein each of R1 to R6 is H or a C1-10 alkyl group, each of X and Y is an ethyleneoxy group or a propyleneoxy group, and each of m and n is a positive number of from 1 to 20, (c) at least one polishing accelerating compound selected from the group consisting of citric acid, oxalic acid, tartaric acid, glycine, &agr;-alanine and histidine, (d) at least one anticorrosive selected from the group consisting of benzotriazole, benzimidazole, triazole, imidazole and tolyltriazole, (e) hydrogen peroxide, and (f) water.
Abstract:
A bulb comprises an airtight envelope having a filling gas therein. A conductive wire extends outwardly from the airtight envelope. A conductive pipe pin has the conductive wire passed therethrough, a predetermined welding portion, and a welded portion including a smooth surface. An outer diameter of the welded portion is no greater than the outer diameter of the pin. The welded portion may be formed in the pipe pin by the fluid of the melted conductive wire and predetermined welding portion flowing into the pipe pin and hardening.
Abstract:
A wafer is polished while it is pressed against a polishing cloth through a pressure air layer, and a polished surface adjustment ring as well as the wafer are pressed against the polishing cloth. The wafer is polished in the state wherein a collapsing position of the polished surface adjustment ring with respect to the polishing cloth is set in such a way that the polishing pressure which is applied from the polishing cloth to the wafer can be constant.
Abstract:
A semiconductor wafer is held by a wafer mount plate, which is loosely inserted into a housing. An air chamber is formed between the wafer mount plate and the housing. A retainer ring encloses the semiconductor wafer, and the semiconductor wafer as well as the retainer ring contacts with a polishing pad. An roughness is formed at the bottom of the retainer ring so as to dress the polishing pad. Polishing liquid is supplied to the inside of the retainer ring. Thus, the polishing pressure can be uniformly applied and the polishing liquid can be uniformly supplied on the whole surface of the semiconductor wafer, and the polishing for the semiconductor wafer and the dressing for the polishing pad can be performed at the same time.