摘要:
The semiconductor device of this invention consists at least of a laminate of a semi-insulating or p-type first semiconductor layer having a forbidden band width E.sub.g1, an undoped or p.sup.- -type second semiconductor layer having a forbidden band width E.sub.g2 and an n-type third semiconductor layer having forbidden band width E.sub.g3. The laminate is deposited on a predetermined semiconductor substrate and the forbidden band width has the relation E.sub.g2
摘要:
Disclosed is a semiconductor laser device comprising a semiconductor assembly which serves to effect laser oscillation and in which first, second and third semiconductor layers are successively stacked on a predetermined semiconductor body, at least the first and third semiconductor layers being small in the refractive index relative to the second semiconductor layer and great in the forbidden band gap relative thereto and having conductivity types opposite to each other, and means to spread depletion regions within at least a part of a current path for effecting the laser oscillation and in a manner to intersect with the current path. A small-sized semiconductor laser device capable of fast modulation can be realized.
摘要:
Disclosed is a semiconductor laser device comprising a layered semiconductor region capable of laser oscillation and including at least an optical confinement region consisting of stacked semiconductor layers, means for injecting current into the optical confinement region, and means for constructing an optical resonator; switching means for supplying the layered semiconductor region capable of laser oscillation with a current having a value near a threshold current value for the laser oscillation; and switching means for feeding a current to be superposed on the current supplied to the layered semiconductor region capable of laser oscillation, this switching means being capable of controlling the current to be superposed through an external input thereof.
摘要:
Herein disclosed is a field effect transistor fabricating method comprising: the step of forming a surface portion of a semiconductor substrate with an impurity region for a channel; the step of forming a first material layer, which has a width substantially equal to that of a gate electrode, in such a position on said semiconductor substrate and is to be formed with said gate electrode, a second material layer, which has a width larger than that of said first material layer, above said first material layer, and source and drain regions by an ion implantation using said first and second material layers thus formed as a mask; the step of forming source and drain electrodes in contact with said source and drain regions; the step of forming a third material layer, which has a selectivity with said first material layer in its etched characteristics, on the semiconductor body thus far prepared by the foregoing steps; the step of forming at least an aperture by removing said first material layer in a state using said third material layer as a mask; and the step of forming said gate electrode in said aperture.
摘要:
This specification discloses a self-aligned manufacturing method of a Schottky gate FET. This method comprises the steps: forming a gate metallic layer on a semiconductor substrate and a mask overhanged on the metallic layer; ion-implanting impurity ions into the semiconductor substrate using the mask to form a source/drain region; depositing an insulator on the gate metallic layer side surface and the other surface below the mask; directionally etching said deposited insulator using the mask to expose the source/drain region; depositing a source/drain electrode using the mask; and removing the mask.
摘要:
A stereoscopic optical system includes, at a distal end of an insertion part of an endoscope, a two-path forming optical system for forming two paths of rays involving a parallax, an image forming optical system for forming images out of light travelling along the respective paths of rays in the two-path forming optical system onto a common region, and an image sensor arranged at an image forming position of the image forming optical system. The stereoscopic optical system is further provided with a time-division path switching means that is capable of switching between the two paths of rays in a time-division manner so that only light coming from either one of the two paths of rays formed by the two-path forming optical system enters the image forming optical system.
摘要:
An endoscope system has a light source apparatus and an endoscope including an illumination optical system and an objective optical system. At least the objective optical system of the endoscope is provided with an adjustable diaphragm, and in a light path in one of the light source apparatus, the illumination optical system, and the objective optical system, an insertable/retractable filter for observation for special light is provided. The adjustable diaphragm performs a closing operation or an opening operation only when the filter for observation for special light is inserted into the light path.
摘要:
To provide a semiconductor device including a pair of antifuse elements at either a high level or a low level, an OR circuit that outputs different logic information for a case that at least one of the antifuse elements is at a high level and a case that both of the antifuse elements are at a low level, and an exclusive OR circuit that outputs different logic information for a case that the logic states are different from each other and a case that they are same as each other.
摘要:
A light reuse sheet includes a reflective surface having an uneven configuration, the reflective surface in order to reflect light in a specific direction so as to cause light to be incident to a solar battery cell, the light being incident to a solar battery module, or in order to exit light in a specific direction by reflecting the light, the light being emitted from a light emitting element of a light source module. The reflective surface satisfies the following formula where a length in a horizontal direction of a solar battery cell or a light emitting element is represented by Lx; a length in a vertical direction of a solar battery cell or a light emitting element is represented by Ly; an angle formed between a direction of an uneven configuration of the reflective surface and an edge in a horizontal direction of the solar battery cell or the light emitting element is represented by φ; and maximum width of light which passes between adjacent solar battery cells and which is reflected by a light reuse sheet and is incident to a light receiving face of a solar battery cell or maximum width of light which is not emitted from a light emitting element in a specific direction and which exits in a specific direction by reflecting the light at a light reuse sheet is represented by A. f φ = 0 = Ly · cos φ - Lx · sin φ - A ( cos 2 φ - sin 2 φ ) ( Formula 1 )
摘要:
There is provided a projector having a point light source disposed to an edge of an optical fiber for transmitting exciting light and including a fluorescent illuminant for emitting fluorescence by being exited by the exiting light, a light collecting optical system for collecting the fluorescence emitted from the point light source, a reflective display device for reflecting the fluorescence collected by the light collecting optical system and overlapping the fluorescence with an image signal, an outgoing aperture for stopping down the fluorescence overlapped with the image signal by the reflective display device, wherein the outgoing aperture and the point light source are disposed side by side in the vicinity of the front focusing surface of the light collecting optical system. With this arrangement, a bright projected image can be obtained while disposing the outgoing aperture and the point light source sufficiently near to each other, reducing aberration, and reducing the diameter of a collecting lens so that the overall size of the projector can be reduced.