Abstract: A logic verification apparatus for a semiconductor integrated circuit classifies a program described in HDL into connection information of a synchronous circuit portion and connection information of a asynchronous circuit portion, converts a portion of the connection information of the asynchronous circuit portion into the connection information of the synchronous circuit portion and increases circuit portions the function of which can be verified by a cycle based simulation/static timing verification unit, thus making it possible to shorten the time for verification.

Abstract: Where the output delay of a combinational circuit in a logic circuit is defined by a clock cycle count, data transfer means for outputting data delayed in the same number of clock cycles is inserted in a block of a cycle-based simulator. The data transfer means comprises registers or a combination of registers and selectors. The cycle-based simulator may be further arranged to automatically recognize the output delay of a combinational circuit in a target logic circuit. Data transfer means for effecting an output delay in the recognized number of clock cycles is then automatically inserted in a block of the cycle-based simulator.

Abstract: A room temperature curable mildew resistant organopolysiloxane composition comprises (A) a hydroxyl or hydrolyzable group-containing organopolysiloxane, (B) a hydrolyzable organosilane such as methyltrimethoxysilane, methyltris(methylethylketoxime silane) or vinyltris(methylethylketoxime silane), a partially hydrolyzed product thereof or a mixture of the hydrolyzable organosilane with the partially hydrolyzed product thereof; and (C) a triazolyl group-containing compound such as 2-(4-chlorophenyl)ethyl-.alpha.-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-yl -ethanol. Preferably, the component (B) does not contain aliphatic unsaturation in the molecule, and in this case, the component (B) free of aliphatic unsaturation is used in combination with (B') a hydrolyzable silane such as tetrakis(dimethylketoxime)silane, a partially hydrolyzed product thereof or a mixture of the hydrolyzable silane and the partially hydrolyzed product thereof.

Abstract: A master slice LSI with fault detection circuitry includes a packed transistor area consisting of rows of semiconductor devices packed on a substrate. Parts of the rows are used for providing an application specific integrated circuit (ASIC). Remaining parts of the rows are used for providing fault detection circuitry for finding faulty semiconductor devices. The fault detection circuitry includes shift registers, sense amplifiers, and a decoder. The detection circuitry is provided only for those rows of semiconductor devices used for providing the intended purpose ASIC.

Abstract: In a sheet discharger with a simple structure, the subsequently discharged sheet can be stored under such a condition that this subsequently discharged sheet is overlapped on the rear surface of the previously discharged sheets. The sheet discharger includes a vertical type sheet discharge tray inclined backwardly along an upper direction; an discharge roller apparatus having a front side discharge roller and a rear side discharge roller, which are arranged at a lower end portion of the vertical type sheet discharge tray. The vertical type sheet discharging tray includes a rear surface supporting member for supporting a rear surface of an discharged sheet, a bottom member for supporting a lower end of the discharged sheet, and a front surface supporting member for defining a forward position of the lower end of the discharged sheet.

Abstract: This composition comprises (A) a diorganopolysiloxane terminated with hydroxyl groups at both ends of its molecular chain having a viscosity of 25 to 1,000,000 cSt at 25.degree. C., (B) a low molecular weight organosilane or straight chain organosiloxane having silanol groups, such as HO(Me.sub.2 SiO)H, Me.sub.3 SiO[Me(OH)SiO].sub.2 SiMe.sub.3 or mixtures thereof, (C) a hydrolyzable silane, and (D) a silica filler having a specific surface area of 50 m.sup.2 /g or more. The composition has good non-flowability and exhibits good application workability when surface-finishing with spatula, and therefore is useful as building sealing materials.

Abstract: A polygon mirror mounting structure mounting a polygon mirror to an outer periphery of a rotor includes a mirror seating surface formed on the outer peripheral portion of the rotor for seating the polygon mirror thereon, and a retaining member having a ring-shaped configuration and a plurality of radially extending pawls on the outer periphery thereof for retaining the polygon mirror on the mirror seating surface. The pawls have an arcuate or tapered cross-sectional configuration and directly press the polygon mirror downwardly and radially outwardly, to thereby enable securing the polygon mirror to the rotor without providing through-holes for receiving screws in the polygon mirror.

Abstract: Disclosed herein is a carbon fiber-reinforced carbon composite material which comprises a carbon fiber reinforcement in the form of nonwoven fabric and a matrix composed of an adhesion promoting phase of vitreous carbon and a filling phase of soft carbon or fine mosaic carbon. It has a high density, high strength, good frictional properties, and high wear resistance.

Abstract: The silicone rubber composition of the present invention comprises (A) an organopolysiloxane obtained by mixing and heating an organopolysiloxane having a silanol group at both ends of the molecular chain and a silane or a siloxane having two hydrolyzable groups in the molecule, (B) a finely divided silica, and (C) a curing agent. The composition, wherein the content of low-molecule siloxanes is remarkably constrained, is quite useful in the application wherein low-molecular siloxanes are obnoxious, for example, in the application of electrical contacts and parts used adjacent thereto, roll materials of copying machines, gaskets for construction, etc.

Abstract: This composition comprises (A) an organopolysiloxane having at least two SiOH groups in its molecule, (B) an organopolysiloxane having at least two SiH groups in its molecule, (C) a platinum family metal catalyst, and (D) a hydroperoxide. By using the hydroperoxide as a catalyst-retarding agent in cure reaction of a dehydrogenation system in which hydrogen is a foaming agent, this composition has a long pot life and can be cured and foamed to produce a foamed cured product in the form of a sponge having uniform cells.

Abstract: A method of producing a silicone rubber composition, comprising heating a mixture of an organopolysiloxane having a silanol group at both the ends of the molecular chain, a end blocking agent, such as a triorganosilanol, a silane or a siloxane having two dialkylaminosilyl groups in the molecule, and a reinforcing filler thereby carrying out chain lengthening and end blocking of said organopolysiloxane. According to this method, a silicone rubber composition whose low-molecular siloxane content is held down remarkably can be produced without consuming a large amount of energy for the mixing.

Abstract: A manufacturing method of organosilanes having silanol groups which is characterized by mixing organoalkoxy silanes, having at most a 20 ppm content of chlorine, expressed by the general chemical formula (1) below:Si(R.sup.1).sub.m (R.sup.2).sub.n (OR.sup.3).sub.k (1)wherein each of R.sup.1 and R.sup.2 is either a substituted or unsubstituted monovalent hydrocarbon group; R.sup.3 is an alkyl group of 1 to 4 carbon atoms; subscripts m and n are 0, 1, 2, or 3; k is either 1 or 2; and the sum of subscripts m+n+k=4, with ion-exchanged water having an electroconductivity of at least 10.sup.10 M.OMEGA., then further adding a macro-porous cation-exchange resin with a pore volume measured by the mercury injection method of at least 0.1 ml/g to the said mixture, followed by stirring of the mixture and removal of the cation-exchange resin.

Abstract: A room temperature vulcanizable composition comprises a diorganopolysiloxane blocked with a silanol group at both ends of the molecular chain, an organopolysiloxane having at least three silanol groups in the molecule, and at least one member selected from the group consisting of organosilanes and organopolysiloxanes each having two hydrolyzable groups in one molecule. The composition ensures easy control of its working life and is able to yield a cured product having a low modulus over a long time.

Abstract: A siloxane gum is prepared by adding a silane or siloxane having two hydrolyzable groups in a molecule to a silanol-terminated organopolysiloxane in such an amount to give a molar ratio of silanol group/hydrolyzable group of from 0.5 to 3 and effecting condensation polymerization. The resulting organopoly-siloxane has a degree of polymerization of higher than 1,000 and a minimized content of low-molecular weight cyclic siloxanes of less than 5,000 ppm.

Abstract: A silicone rubber composition mainly comprising an organopolysiloxane of the average compositional formula: R.sub.n.sup.1 SiO.sub.(4-n)/2 wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group and n=1.98 to 2.02 can be rendered antibacterial and antifungal by blending a zeolite containing 0.1 to 15% by weight of a silver ion.

Abstract: A logic circuit synthesizer is disclosed which synthesizes a better dimensioned logic circuit which has improved electrical characteristics. A logic circuit leveling part levels logic circuit data while referring to a leveling dictionary and maintaining logic function frames to thereby output leveled logic circuit data which contains information about logic function frames. The leveled logic circuit data are then given to a logic circuit synthesizing part where they are leveled using a conversion library and considering the information about logic function frames, whereby synthesized logic circuit data are produced. Since the synthesizing is performed in light of the information about logic function frames and what are prescribed in the conversion library a resultant synthesized logic circuit is improved in terms of both electrical characteristics and a dimension accuracy.

Abstract: Organopolysiloxanes having a silanol group at both terminal ends of molecular chain thereof are brought into condensation reaction with each other in the presence of a silane or siloxane having at least two dialkylaminosilyl groups per molecule as a condensation catalyst and a triorganosilanol or other endblocking agent, to lengthen the chain of the organopolysiloxane under reaction, whereby a triorganosilyl-endblocked organopolysiloxane with a high polymerization degree is obtained. The process yields a triorganosilyl-endblocked high-polymerization-degree organopolysiloxane while effectively suppressing or preventing the formation of low-molecular-weight siloxanes.

Abstract: A conductive silicone rubber composition is prepared by mixing an organopolysiloxane having an aminoalkyl radical, an organopolysiloxane having a (meth)acryloxyalkyl or glycidoxyalkyl radical, and conductive carbon black to form silicone rubber composition (A) in which the carbon black is fixed, and then mixing it with a silicone rubber composition (B) comprising a dimethylpolysiloxane. The composition has stable resistivity in the semiconductive region independent of molding conditions.

Abstract: In a semiconductor device, a signal delay element is configured by using resistance and capacitance components included in a region except regions where logic elements for a gate array exist, and the signal delay element is inserted between a logic element for outputting signals and logic elements for receiving the signals and connected to these logic elements. A placing and wiring apparatus for producing the semiconductor device is disclosed.

Abstract: An air bag coating composition is obtained by emulsifying (A) an organopolysiloxane containing at least two alkenyl groups each attached to a silicon atom, (B) an organohydrogenpolysiloxane containing at least three hydrogen atoms each attached to a silicon atom, and (C) a curing catalyst in water in the presence of an emulsifier to form an aqueous silicone emulsion. The composition cures into a coating which firmly adheres to an air bag base fabric and provides a tack-free surface.