摘要:
A composition for film formation according to the present invention includes polymerizable compounds each having at least one polymerizable functional group, and the polymerizable compound includes a partial structure containing an adamantane type cage structure and at least one polymerizable reactive group contributing to polymerization reaction in one molecule thereof. Further, the polymerizable reactive group contains an aromatic ring and at least one ethynyl or vinyl group directly bonded to the aromatic ring as the polymerizable functional group, and the number of carbon atoms derived from the aromatic ring is in the range of 15 to 38% with respect to the number of total carbon atoms of the polymerizable compound.
摘要:
The present invention provides a layer insulating film for multilayer interconnection of semiconductors which is excellent in resistance to heat, resistance to moisture absorption as well as in electric characteristic properties, and a process for producing the film. That is, a layer insulating film for multilayer interconnection of semiconductors which comprises a fluorine-containing polybenzoxazole resin having the structure represented by the formula (6) and obtained by a process which comprises subjecting to heat-dehydrating ring closure a fluorine-containing polyhydroxyamide resin obtained by reacting a dicarboxylic acid diester obtained from one kind of compound selected from the group of compounds represented by the formulas (2) and 2,2′-bis(tri-fluoromethyl)-4,4′-biphenyldicarboxylic acid, with 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, (in the formula (6), m is an integer of 10-500).
摘要:
Heat resistant polybenzoxazole resins useful as layer insulation films and protective films for semiconductor, layer insulation films for multilayer circuits, cover coats for flexible copper-clad sheets, solder resist films, liquid crystal-aligned films and the like. These resins have excellent thermal, electrical, physical and mechanical characteristics. Polybenzoxazole precursors are provided, represented by the general formula (A), and are used to obtain polybenzoxazole resins, represented by the general formula (D). In the formulas (A) and (D), n denotes an integer from 2-1000, and X denotes a structure having a formula selected from structures indicated at (B). In the formulas at (B), Y denotes a structure having a formula selected from those indicated at (C), and the hydrogen atom(s) on the benzene ring in these structures are optionally substituted.
摘要:
An optical transmission device has a light emission element for converting an electrical signal to an optical signal to transmit it to an optical fiber; a lead frame for mounting the light emission element and having a through hole at a position determined with reference to a mounted position of the light emission element; and a receptacle having a protrusion portion inserted in the through hole to fix a position of the lead frame relatively, and a sleeve into which an end portion of the optical fiber is inserted to fix a position of the optical fiber relatively, the receptacle optically connecting the light emission element and the optical fiber.
摘要:
An optical transmission device has a light emission element for converting an electrical signal to an optical signal to transmit it to an optical fiber; a lead frame for mounting the light emission element and having a through hole at a position determined with reference to a mounted position of the light emission element; and a receptacle having a protrusion portion inserted in the through hole to fix a position of the lead frame relatively, and a sleeve into which an end portion of the optical fiber is inserted to fix a position of the optical fiber relatively, the receptacle optically connecting the light emission element and the optical fiber.
摘要:
A process for producing polyimide microfine particles which is amenable to free control of particle morphology and particle diameter distribution is provided. A polyamic acid and a polyimide, each in the form of microfine particles with good monodispersibility, are also provided. There is also provided a process for producing polyimide microfine particles from a tetracarboxylic anhydride and a diamine compound which comprises (a) a first step of preparing a first solution containing the tetracarboxylic anhydride and a second solution containing the diamine compound, (b) a second step of mixing the first and second solutions and causing a polyamic acid to precipitate in the form of microfine particles from the mixed solution under ultrasonic agitation, and (c) a third step of imidating the polyamic acid particles to provide the objective polyimide in the form of microfine particles.
摘要:
A start control device and a start control method of a vehicular power transmission system including a lock-up clutch and a start clutch are provided in which start-time lock-up slip control is performed, and neutral control is performed. When the start-time lock-up slip control is additionally executed during cancellation of the neutral control, the gradient of an output rotational speed of the hydraulic power transmission which is changed, through engagement of the start clutch, toward an input rotational speed of the automatic transmission at the time of completion of engagement of the start clutch is controlled, using at least one of a start clutch pressure that is increased so as to engage the start clutch, and a lock-up clutch pressure that is increased so as to bring the lock-up clutch into slip engagement.
摘要:
A control apparatus for a vehicular automatic transmission configured to selectively establish a plurality of shift positions by respective combinations of frictional coupling devices of a plurality of frictional coupling devices in an engaged state thereof, with output hydraulic pressures of respective ones of a plurality of solenoid valves provided in a hydraulic control circuit, includes a fail-safe control portion configured to perform a predetermined fail-safe function when shifting direction values requiring a shifting control of said vehicular automatic transmission and shifting output values respectively generated according to said shifting direction values are not coincident with each other, said shifting output values being represented by respective electric signals for driving said plurality of solenoid valves.
摘要:
There is disclosed a storage apparatus which is of a system of utilizing a polarized state change by Kerr effect to read information from a storage medium and which easily and precisely performs adjustment to compensate for a phase deviation between both P, S polarized components attributed to an optical system. Phase plates 500, 510 are disposed between a fixed optical section 200 and a movable optical section 190 and the inclination angles of the phase plates are adjusted.
摘要:
A precursor of a polybenzoxazole resin which comprises a crosslinking group in a molecule and has a specific structure, a polybenzoxazole resin obtained from the precursor by the condensation reaction and the crosslinking reaction, an insulating film comprising the polybenzoxazole resin and a semiconductor device comprising an insulating interlayer film in multi-layer wiring or a film for protecting surfaces which comprises the above insulating film. The precursor exhibits excellent processability due to excellent solubility in solvents and, after the ring closure, excellent heat stability in applications. The resin exhibits excellent electric, physical and mechanical properties and is advantageously used for insulating interlayer films of semiconductor devices and the like applications.