摘要:
A multi-point light emission type semiconductor laser device including a plurality of light emission points which are produced on a p type or n type semiconductor layer monolithically and are capable of being driven independently includes electrically insulating or semi-insulating semiconductor regions provided at intermediate portions of light emission points in the p type or n type semiconductor layer. A separation groove is further produced up to reaching the insulating or semi-insulating regions from the side opposite to the semiconductor layer. Thus, respective light emission points are perfectly electrically separated each other by this separation groove and the region.
摘要:
A mobile device includes a trigger having a rod-like body fixed at one end. A housing has a first hole into which the body is inserted. A sensor detects that the trigger has been operated in the direction in which the body is pulled from the hole. A buzzer is activated in response to the sensor's having detected the operation of the trigger. A second hole is formed in a firmly fitted member. The body is inserted in the second hole so as to be freely slid forward or backward against the hole. The fitted member is fitted firmly in the entrance portion of the first hole; and a sealing member contacts the internal wall of the first hole and the body.
摘要:
A mobile terminal device includes a display section; a housing including a frame member forming an opening for accommodating the display section; a transparent plate member disposed over the display section; a metal panel member disposed over the frame member so as to expose the transparent plate member; and an adhesive member having an adhesive obverse surface and an adhesive reverse surface placed between the frame member and each of the transparent plate member and the metal panel member, the adhesive reverse surface being adhesively fixed to the frame member, the adhesive obverse surface being adhesively fixed to the transparent plate member and the metal panel member.
摘要:
A semiconductor device includes a semiconductor substrate having a principal plane on which gate, source, and drain electrodes are located. A film made of a polymer with a low dielectric constant is over the gate and drain electrodes to insulate the gate and drain electrodes from the source electrodes. A chip surface electrode located over the low-dielectric-constant polymer film and the source electrode, and connected to ground potential. The source electrode is provided with the ground potential through the chip surface electrode.
摘要:
In a method for evaluating a crystalline semiconductor substrate which includes a collector layer, a base layer, and an emitter layer and is used for a heterojunction bipolar transistor, a layer is provided having the same composition as the base layer. The semiconductor substrate is irradiated with excitation light and change with time in intensity of photoluminescence from the layer is measured before the intensity becomes saturated. The change with time in current gain of the heterojunction bipolar transistor produced using the semiconductor substrate is determined from the change with time in the intensity.
摘要:
In a sample assembly for a thermoelectric analyzer, typically TSC (Thermally Stimulated Current) analyzer, a sample is fixed to an electrically-insulating substrate via an adhesive layer. The material of the adhesive layer is indium or gold-tin alloy. The substrate has a pair of junction electrode layers formed thereon and a pair of electrode layers formed on the same plane of the sample. One of the electrode layers is connected with one of the junction electrode layers by electrically-conductive wire, while the other of the electrode layers is connected with the other of the junction electrode layers by another electrically-conductive wire. The substrate is made of preferably made of a highly electrically-insulating and highly thermally-conductive material which may be, for example, aluminum nitride (AlN), boron nitride (BN), beryllium oxide (BeO) or aluminum oxide (Al2O3). The sample may preferably be a compound semiconductor such as GaAs.
摘要:
A hetero-junction bipolar transistor having high reliability wherein a ballast resistance is exactly controlled and deterioration in current stability is eliminated. A GaAs ballast resistor layer is provided in a hetero-junction bipolar transistor having a GaAs emitter layer, an InGaP spacer layer, and a GaAs base layer, preventing a notch from being formed in the conduction band at the interface of the emitter layer and the ballast resistor layer, exactly controlling the ballast resistance. The AlGaAs layer is prevented from trapping impurities and the current stability is prevented from deteriorating.
摘要:
An interference waveform dispersion spectrum of light reflected from a multi-layer film is compared to a waveform obtained by numerical calculation using an optical characteristic matrix. Respective layer thickness values obtained from the calculated analysis of the Spatial interference waveform are subjected to waveform fitting with actually measured values. The theoretical interference spectrum is recalculated while changing approximate values of the layer thicknesses until a match is obtained to obtain precise respective layer thicknesses. The thicknesses of respective layers of a thin multi-layer film of submicron thicknesses can be non-destructively measured exactly and stably without direct contact.
摘要:
A novel semiconductor laser device includes a P-type semiconductor substrate, an N-type InP current blocking layer on the substrate, a P-type InP buried layer of which has the same thickness as and is surrounded by the first current blocking layer, and a ridge, on the buried layer, having a double heterojunction structure therein and including a stack of a planar P-type first InP cladding layer, a planar InGaAsP active layer, and a planar N-type second InP cladding layer. The ridge has a width of the same order as that of the buried layer. A P-type InP current blocking layer is disposed on the N-type current blocking layer burying the ridge and an N-type contact layer is formed opposite and in contact with the P-type current blocking layer and the N-type cladding layer. The conductivity types of the layers can be reversed.
摘要:
A multi-point light emission type semiconductor laser device including a plurality of light emission points which are produced on a p type or n type semiconductor layer monolithically and are capable of being driven independently includes electrically insulating or semi-insulating semiconductor regions provided at intermediate portions of light emission points in the p type or n type semiconductor layer. A separation groove is further produced up to reaching the insulating or semi-insulating regions from the side opposite to the semiconductor layer. Thus, respective light emission points are perfectly electrically separated each other by this separation groove and the region.