Abstract: In a circuit board obtained by providing a metallized layer of wiring on the surface or interior of an insulation substrate, the insulation substrate is, for example, a multi-layer circuit board or a package for semiconductor element, the insutating substrate obtained from a sintered body having a linear expansion coefficient of 8 to 18 ppm/.degree. C. at 40.degree. to 400.degree. C. which is prepared by sintering a molded body containing 20 to 80% of a glass having a liner expansion coefficient of 6 to 18 ppm/.degree. C. at 40.degree. to 400.degree. C. and 80 to 20% of a filler having a linear expansion coefficient of at least 6 ppm/.degree. C.

Abstract: A method of forming a resist pattern comprising forming a photoresist layer on a substrate, forming a transparent anti-reflective film on said photoresist layer by applying an anti-reflective material onto said photoresist layer, said anti-reflective material comprising a fluorinated resin which is soluble in an organic hydrocarbon solvent, exposing a light to said resist layer through said transparent anti-reflective film, removing said anti-reflective film using an organic hydrocarbon solvent, and developing said photoresist layer.

Abstract: A choke call includes a bobbin, a pair of windings wound around the bobbin, and two magnetic cores. The bobbin has a rectangular barrel in which a circular hole is defined. The two magnetic cores are partly inserted into the hole of the barrel. The hole is offset from the central axis of the barrel. A central collar extends perpendicular to and at the central portion of the barrel. Two end collars extend beyond and parallel to opposite ends of the barrel. The thickness of the central collar is approximately two times greater than that of the end collars. The magnetic cores collectively form an opening. Within the opening, the gap between the outer periphery of the central collar and the magnetic cores is greater than that between the outer periphery of the end collars and the magnetic cores. A part of the magnetic cores within the hole has a circular or rectangular cross-section.

Abstract: A choke coil having a sufficient noise eliminating effect against common mode and normal mode noises. The choke coil has a bobbin, a pair of windings wound around the bobbin, and magnetic cores inserted in a rectilinear body portion of the bobbin. The bobbin is constituted by a main body and a cap each of which incorporates a magnetic core. The upper half of those magnetic cores forms a closed magnetic circuit that extends around one of the windings while the lower half forms a closed magnetic circuit that extends around the winding.

Abstract: In the case where a wide-band color picture signal provided for a high-definition television broadcasting is sub-sampled for narrow-band transmission, in comparison with a stationary picture signal which is applied with sub-sampling according to a sampling pattern circulated at every two frames, the color picture signal in motional picture regions, which is conventionally applied with line-offset sub-sampling at every field, has a lowered resolution. To improve the resolution concerned, color difference signals in motional picture regions are applied with inter-field offset sub-sampling together with band-limitation for preventing aliasing distortion accompanied with subsampling and signal processing including interpolation for reproduction, which are effected in a form completed at every frame. As for motional picture regions having small motion, a luminance signal is applied also with similar sub-sampling and similar signal processing.

Abstract: A choke coil which functions not only to eliminate common mode noise but also to eliminate differential mode noise. A couple of coils are wound around a circular first core and a second core which is disposed inside the circular first core. The second core has a circular frame and a bridge which is laid in the frame. The first core may be easy to become magnetic saturation but is made of a material with a large magnetic permeability, and preferably a material with a relative magnetic permeability of several thousand, such as ferrite and amorphous. The second core is made of a material which is hard to become magnetic saturation, and preferably a material with a relative magnetic permeability of some scores to several hundred, such as dust core.

Abstract: A common mode choke coil has a couple of coils, a magnetic frame in which the coils are encased, the magnetic frame forming closed magnetic circuits around the respective coils, and a magnetic core which pierces through the magnetic frame. The frame is made of an insulating magnetic material which has a relative magnetic permeability of more than one, preferably two through some scores. For example, a mixture of ferrite powder of Ni--Zn and resin is used as the material of the frame. The core is made of a material which has a relative magnetic permeability of preferably several thousands, such as ferrite and amorphous.

Abstract: A straight-chain organopolysiloxane represented by the general formula: ##STR1## wherein R.sup.1 represents a monovalent hydrocarbon group, R.sup.2 represents a bivalent organic group, Rf represents a perfluoroalkyl ether group or a perfluoroalkyl group, X represents a hydrogen atom or an organosilyl group, and n is an integer of 15 to 4,000 and having a content of cyclic polysiloxanes with a molecular weight of 3,000 or below of 50 ppm or below. This organopolysiloxane is novel in that the content of cyclic siloxanes with a molecular weight of 3,000 or below is only 50 ppm or below and the organopolysiloxane can obviate contact failure due to volatilization of components or surrounding contamination due to bleeding when used as materials in the field of electricity and electronics or as building materials.

Abstract: An extremely reactive and highly copolymerizable hexafluoropropylene oxide oligoether derivative, to give bi- or ter-polymers with fluoroolefins and perfluoroalkyl vinyl ethers, which is represented by general formula: ##STR1## wherein X is a fluorine atom or trifluoromethyl group; and n is an integer of 2-5.

Abstract: A common mode choke coil having a couple of cores shaped like U and four coils wound around legs of the cores. The cores having coils around their legs are butt-jointed at the end, and coils wound around each couple of butted legs cause magnetic fluxes in mutually opposite directions.

Abstract: An organopolysiloxane composition comprising (A) a linear, alkenyl-containing, fluorinated organopolysiloxane, (B) a cyclic fluorinated organosiloxane as a tackifier, (C) an organohydrogenpolysiloxane having at least two hydrogen atoms attached to a silicon atom in a molecule, and (D) a platinum group metal catalyst has excellent properties inherent to fluorinated silicone rubber, and cures into products having adhesion and close contact to various materials including metals, glass and resins.

Abstract: A novel organic silicon compound having at least one .tbd.SiH group in a molecule and a fluorinated organic group at either end is a useful crosslinking agent for various resins, especially fluorinated resins. An organopolysiloxane composition comprising (A) an organopolysiloxane having in a molecule at least two alkenyl groups and at least one fluorinated substituent, (B) an organohydrogenpolysiloxane having at least two .tbd.SiH groups in a molecule and a fluorinated organic group at either end, and (C) a platinum catalyst is readily curable to products having solvent and moisture resistance.

Abstract: A cyclotrisiloxane represented by the general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may be the same or different and are each an alkyl group of 1 to 3 carbon atoms and X is a cyclohexyl group or an alkyl group expressed by the formula:--C.sub.n H.sub.2n+1where n is an integer of 4 to 15. The cyclotrisiloxane is useful as an intermediate for producing silicone oils and silicone rubbers, and the obtained silicone oils and silicone rubbers are excellent in lubricity.

Abstract: A voice recognition apparatus capable of recognizing any word utterance by using a neural network, the apparatus includes a unit for inputting an input utterance and for outputting compressed feature variables of the input utterance a unit using a neural network and connected to the input unit for receiving the compressed feature variables output from the input unit and for outputting a value corresponding to a similarity between the input utterance and words to be recognized. The neural network unit has a first unit for outputting a value which corresponds to a similarity in partial phoneme series of a specific word among vocabularies to be recognized with respect to the input utterance. The neural network also has a second unit connected to the first unit for receiving all of the values output from the first unit and for outputting a value corresponding to a similarity in the specific word with respect to the input utterance.

Abstract: Organic silicone compounds of this invention are expressed by the following general chemical formula: ##STR1## wherein R.sup.1 is a substituted or unsubstituted alkyl group with 1 to 4 carbon atoms, R.sup.2 is substituted or unsubstituted monovalent hydrocarbon group, X is either a hydrogen atom or a triorganosilyl group which is expressed by the following general chemical formula (2): ##STR2## wherein R.sup.3, R.sup.4 and R.sup.5 are a substituted or unsubstituted monovalent hydrocarbon group with 1 to 8 carbon atoms, each of which may be the same or different, p is an integer from 4 to 16, m is an integer from 0 to 1000, and n is an integer from 1 to 1000. The organic silicon compounds of this invention are extremely useful as raw material of rubber cured products with high strength and a superior transparency.

Abstract: A chain organopolysiloxane is obtained by polymerizing a fluorine-containing cyclotrisiloxane of the general formula: ##STR1## (wherein R.sup.1 is a monovalent hydrocarbon group, and Rf is a perfluoroalkyl group or perfluoroalkyl ether group)in the presence of a lithium silanolate catalyst, silylating the resulting polymerization product, and treating the silylated product at a temperature of not lower than 100.degree. C. under a reduced pressure of not higher than 10.sup.-1 mmHg to remove volatile components therefrom. The organopolysiloxane is essentially free of volatile low-molecular siloxanes. Therefore, the chain organopolysiloxane can be used without the problems which might arise from the volatile low-molecular siloxanes, such as evaporation of low-molecular siloxanes from a cured rubber product with the result of electrical-contact troubles.

Abstract: An improvement is proposed in a frame-supported pellicle, i.e. a thin transparent film of a polymeric resin adhesively bonded to a frame member, used for dust-proof protection of a photomask in a photolithographic patterning work for the manufacture of electronic devices. The improvement comprises using, as the adhesive, an organopolysiloxane-based composition which comprises (a) a perfluoroalkyl-containing diorganopolysiloxane having at least two vinyl groups per molecule, (b) an organohydrogenpolysiloxane having at least one epoxy group and (c) a platinum catalyst for promoting the hydrosilation reaction between (a) and (b). As compared with conventional adhesives, a quite good adhesive bonding strength can be obtained with this adhesive even when the membrane is made from a fluorocarbon group-containing polymeric resin and the adhesive layer obtained therefrom is highly resistant against ultraviolet irradiation to ensure a long serviceable life of the pellicle.

Abstract: A room temperature curable polyether composition, comprising a polyether compound of which at least one terminal has a group, represented by the general formula (1): ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom or a monovalent organic group, R.sup.3 is a divalent organic group, X is a hydrogen atom, a halogen atom, a hydroxyl group, an alkoxyl group, an alkenyloxy group, an acyloxy group, a ketoximate group, an amido group, an aminoxy group or a mercapto group and a is an integer of 0 to 2, and of which main chain comprises a fluorine-containing polyether chain, represented by the general formula (2): ##STR2## wherein R.sub.f is a perfluoro group, R.sup.4 is a divalent organic group, m is an integer of 4 or more and n is an integer of 0 or more. The cured product thereof is excellent in rubber properties and is useful as one-part or two-part type elastic sealant.

Abstract: A cover-gasket assembly for a hard disk device which comprises a gasket applied to a predetermined position of a cover for the hard disk device, wherein the gasket is formed essentially of a cured product of a fluorosilicone rubber composition. The assembly is particularly excellent in sealing property against permeation of water vapor, and can be used extremely effectively for hard disk devices for handy office-automation apparatuses such as laptop or pocket-size personal computers, word processors and the like which are expected to be used under various temperature and humidity conditions.

Abstract: The present compound is a novel perfluoropolyether represented by the following general formula: ##STR1## wherein m is an integer of 1 to 3 and n is an integer of 2 to 6. This compound is quite useful as an inert liquid used as a heat transfer mediums in the filed of electronic materials.