摘要:
A tapered roller bearing includes an outer race, an inner race, a plurality of tapered rollers, and a cage. A small-diameter end portion of the inner race is formed with a small flange portion for limiting axial movement of the tapered rollers and a cylindrical portion which has a less diameter than the small flange portion and is connected to an axial outer end of the small flange portion. The cage is formed at a small-diameter end portion thereof with a bent portion which is bent inward in a radial direction. A small-diameter end portion of the cage has a bent portion which is faced to an outer surface of the cylindrical portion of the inner race with a predetermined clearance therefrom such that a labyrinth is created between the cage and the inner race.
摘要:
A signal is generated which is active only during an interval of taking one pulse of a series of output pulses of said synchronization detecting sensor, but is not active during an interval of taking more than one pulse thereof. Then, synchronization detection pulses are separated from the pulses output by the synchronization detecting sensor for the respective colors by using the thus-generated signal.
摘要:
A method of avoiding deposition of particles from a film deposited on a wall of a film deposition apparatus, onto a film deposited in the apparatus, the method including directly heating a wall of a reaction chamber, before placing a wafer on a susceptor in the reaction chamber, to at least a wall film peeling temperature at which a wall film does not peel from the wall; placing a wafer in the reaction chamber, heating the wafer, and depositing a film on the wafer without directly heating the wall; ending heating of the wafer after deposition of the film and directly heating the reaction wall of the reaction chamber to at least the wall film peeling temperature; and removing the wafer from the reaction while the wall of the reaction chamber is maintained at a temperature at least equal to the wall film peeling temperature.
摘要:
A semiconductor device includes a first conductivity type cladding layer; a second conductivity type cladding layer; an active layer of a semiconductor sandwiched between the first conductivity type cladding layer and the second conductivity type cladding layer; and a second conductivity type superlattice barrier layer sandwiched between the active layer and the second conductivity type cladding layer and having a superlattice structure including a first compound semiconductor having a larger energy band gap than the active layer and a second compound semiconductor having a smaller energy difference in the conduction band than the first compound semiconductor and a larger energy difference in the valence band than the first compound semiconductor, the first and second conductivity type compound semiconductors being alternatingly laminated in at least one pair of layers. The energy barrier provided between the active layer and the second conductivity type cladding layer has a sufficient height to prevent overflow of carriers and to improve LD characteristics, particularly operation at a high temperature.
摘要:
A method of fabricating a semiconductor laser includes successively growing a lower cladding layer of a first conductivity type, an active layer having a superlattice structure, a first upper cladding layer of a second conductivity type, an etch stopping layer of the second conductivity type, and a second upper cladding layer of the second conductivity type on a semiconductor substrate of the first conductivity type; diffusing a dopant impurity into parallel stripe-shaped regions of the active layer to disorder the superlattice structure of the active layer in these regions; etching the second upper cladding layer to expose the etch stopping layer without exposing the etch stopping layer on the disordered regions, thereby producing a stripe-shaped ridge structure extending perpendicular to the disordered regions; and growing a current blocking layer on the etch stopping layer and on the disordered regions, contacting both sides of the ridge structure. Since an etchant used for patterning does not contact the etch stopping layer on the disordered regions of the active layer, unwanted penetration of the etch stopping layer is avoided.
摘要:
A semiconductor device includes a semiconductor substrate having a surface; and a strained superlattice structure including first semiconductor layers having a first strain in a direction with respect to the semiconductor substrate and second semiconductor layers having a second strain in the same direction as and different in magnitude from the first strain, the first semiconductor layers and the second semiconductor layers being alternatingly laminated. The difference in strains between the first semiconductor layers and the second semiconductor layers is reduced, so that the crystalline quality of the strained superlattice structure is improved.
摘要:
A thermal type air flow sensor wherein a heat generating element is arranged in an intake system, and a time for obtaining an increase in a temperature of a predetermined value is detected, which time corresponds to an amount of the intake air. The values of the intake air amount are averaged through one full cycle. This time is measured repeatedly at predetermined intervals during one full cycle of the pulsation, and a variation rate is calculated for values of the intake air amount obtained at two consecutive timings by a ratio of the difference of these values from the sum of these values. The average values of the intake air amount is corrected in accordance with this variation rate, to thus obtain a precise intake air amount.
摘要:
An internal combustion engine control device is constructed to estimate an engine air intake quantity based on an engine speed when the engine is running in an intake air pulsation generating range to control the engine in accordance with the air intake quantity thus estimated. The estimated air intake quantity is corrected by a correction value which is related to the density of the intake air.
摘要:
A vaporizing type liquid fuel combustion keyboards is disclosed which is particularly suitable for heating individual rooms and which includes a fuel supply system capable of delivering very small volumes of fuel reliably and without the need for excessively complicated components. The apparatus includes an intermittently driven electric fuel pump which is controlled by a flame detector for the the fuel feed at a proper level. An adjustable damper is also provided in the combustion air supply system for regulating the air flow delivered to the combustion apparatus, and is coupled to the fuel feed system for coordinating control thereof. bridge irregularities
摘要:
A tube pump comprises a rotor configured to have a roller and to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap. The rotor includes a disk part which holds the roller on a base side, and a tube press member that engages with the disk part so that the tube does not move to the base side with respect to the disk part, seals a gap formed with respect to the inner circumferential surface of the cap, and is capable of rotating along an outer circumferential part of the disk part is provided at the outer circumferential part of the disk part.