Abstract:
PROBLEM TO BE SOLVED: To provide a polarization organic photoelectric conversion device highly sensitive to polarization, a method for producing the same, and a polarization optical device highly sensitive to polarization and capable of receiving and photoelectrically converting light polarized in two directions.SOLUTION: A polarization organic photoelectric conversion device has a structure in which at least a portion of an organic photoelectric conversion layer 13 interposed between a first electrode 11 and a second electrode 12 is oriented uniaxially in a predetermined direction in the plane in advance. Light is incident on the polarization organic photoelectric conversion device while a predetermined bias voltage is applied between the first electrode 11 and the second electrode 12, and the light polarized parallel to the orientation axis of the organic photoelectric conversion layer 13 is photoelectrically converted. Two of such polarization organic photoelectric conversion devices are disposed respectively on the top and the bottom to construct a polarization optical device.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor laser, using a nitride-based III-V group compound semiconductor, which can have an end surface window structure formed extremely easily, can suppress optical waveguide loss, can suppress light absorption and local heat generation in laser operation due to presence of a surface level, and is high in a manufacturing yield and excellent in a shape of a far-field image; and to provide a method of manufacturing the semiconductor laser. SOLUTION: A groove 16 is formed near at least the formation position of the end surface window structure of an n-type GaN substrate 11. The width, shape, position, etc. of the groove 16 are determined by design. On the n-type GaN substrate 11 in which the groove 16 is formed, a GaN-based semiconductor layer 25 which includes an active layer 19 formed of a nitride-based III-V group compound semiconductor including In and Ga is grown to manufacturer a GaN-based semiconductor laser having the end surface window structure. It is preferable that a recessed part formed at a part over the groove 16 is filled with an insulator. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a semiconductor light emitting element capable of suppressing overflow of an electron without interfering the injection of a hole into an active layer and drastically reducing a driving current and a driving voltage, with easy process using a nitride-based group III-V semiconductor. SOLUTION: The semiconductor light-emitting element has the active layer 7 in the multiple quantum well structure of In x Ga 1-x N/In y Ga 1-y N, an AlGaN/GaN superlattice cap layer 8 in contact with the layer 7, a p-type GaN optical waveguide layer 9 in contact with the layer 8, and a p-type AlGaN/GaN superlattice clad layer 10 in contact with the layer 9. In case of manufacturing the above-described element, the active layer 7 and the AlGaN/GaN superlattice cap layer 8 are grown up in a carrier-gas atmosphere substantially containing no hydrogen and containing nitrogen as a main component. The p-type GaN optical wavegide layer 9 and the p-type AlGaN/GaN superlattice clad layer 10 are grown up in the atmosphere containing nitrogen and hydrogen as the main components. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation:要解决的问题:提供能够抑制电子溢出而不干扰向有源层注入空穴的半导体发光元件的制造方法,并且可以容易地大大降低驱动电流和驱动电压 使用基于氮化物的III-V族III族半导体。 解决方案:半导体发光元件具有In / Sb> Ga 1-x SB> N / In y的多量子阱结构中的有源层7 与层7接触的AlGaN / GaN超晶格帽层8,与层8接触的p型GaN光波导层9和 p型AlGaN / GaN超晶格覆盖层10与层9接触。在制造上述元件的情况下,有源层7和AlGaN / GaN超晶格覆盖层8基本上在载气气氛中长大 不含氢,含氮为主要成分。 p型GaN光波导层9和p型AlGaN / GaN超晶格覆盖层10在以氮气和氢气为主要成分的气氛中长大。 版权所有(C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress the generation of cracking when handling a substrate or making the substrate like a thin film for formation of an electrode, and to manufacture a semiconductor light emitting device or a semiconductor element at a high yield. SOLUTION: A light emitting device structure made of a GaN-based semiconductor layer 2 and a p-side electrode 6 are formed on the first main surface of an n-type GaN substrate 1, the surface of the side of the light emitting device structure and the p-side electrode 6 is adhered to the first main surface of a sapphire substrate 10 by a first adhesive having a first melting temperature, and then the second main surface of the sapphire substrate 10 is adhered to a supporting base by a second adhesive having a melting temperature lower than the first melting temperature. The n-type GaN substrate 1 is made thin from the main surface side, and it is heated at a temperature lower than the first melting temperature and higher than the second melting temperature to melt the adhesive. Thus, the n-type GaN substrate 1 and the sapphire substrate 10 adhered to each other by the first adhesive are peeled off from the supporting base to form an n-side electrode 15 on the second main surface of the n-type GaN substrate 1. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress formation of warpage in a substrate when a nitride-based III-V compound semiconductor layer is grown on the substrate prepared from a substance different from the nitride-based III-V compound semiconductor. SOLUTION: A first nitride-based III-V compound semiconductor layer 3 is grown on a main face of a substrate 1, and striped seed crystals are formed by patterning the layer 3. At this time, in a first area, the seed crystals are periodically formed at a first interval, and in a second area, the seed crystals are formed at a second interval larger than the first interval. Then, a second nitride-based III-V compound semiconductor layer 4 is grown in the lateral direction on the substrate 1 using these seed crystals, and a third nitride-based III-V compound semiconductor layer L for forming an elemental structure is grown on the second nitride-based III-V compound semiconductor layer 4.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor light-emitting device where an initial deterioration rate is small, a long life is achieved, aging and irregularity in light emission are extremely small, and a nitride-based group III-V compound semiconductor is used. SOLUTION: In the semiconductor light-emitting device using the nitride-based group III-V compound semiconductor, a first nitride-based group III-V compound semiconductor containing In and Ga, for example, an active layer 7 made of InGaN, a second nitride-based group III-V compound semiconductor containing In and Ga that are different from the first nitride-based group III-V compound semiconductor, for example, a middle layer 8 made of InGaN, and a third nitride-based group III-V compound semiconductor containing Al and Ga, for example, a cap layer 8 made of p-type AlGaN are successively allowed to contact one another for laminating.
Abstract:
PROBLEM TO BE SOLVED: To provide a GaN-based III-V compound semiconductor light emitting device having high efficiency of light emission and high reliability at a light-emitting wavelength of ≥440 nm. SOLUTION: The GaN-based semiconductor laser element 10 includes a multilayer structure of: a stripe-shaped convex portion 18 made of a surface layer of a sapphire substrate 12, a buffer layer 14 and a first GaN layer 16; and on the sapphire substrate, a second GaN layer 20; an n-side cladding layer 22; an n-side guide layer 24; an active layer 26; a deterioration prevention layer 28; a p-side guide layer 30; a p-side cladding layer 32 and a p-side contact layer 34. In the GaN-based semiconductor laser element, an active layer is formed as a quantum well structure including a GaInN barrier layer 36 and a GaInN well layer 38, and a planar crystal defect prevention layer 40 made of an AlGaN layer is provided on an upper surface or a lower surface, or between both the surfaces of the barrier layer and the well layer. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor light emitting device, using nitride based III-V compound semiconductors, which has longer operating life by improving the crystallinity of an optical waveguide layer. SOLUTION: A semiconductor laser is manufactured by sequentially growing an n-type AlGaN cladding layer 5, an n-type GaN optical waveguide layer 6, an active layer 7, an undoped GaN optical waveguide layer 17, a p-type AlGaN cap layer 9, a p-type GaN optical waveguide layer 10, a p-type AlGaN/GaN superlattice cladding layer 18, and a p-type GaN contact layer. In this case, the n-type GaN optical waveguide layer 6 to the p-type AlGaN cap layer 9 are grown in an atmosphere of N 2 , and the p-type GaN optical waveguide layer 10 to the p-type GaN contact layer are grown in an atmosphere of a mixed gas of N 2 and H 2 . COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide the method of manufacturing a semiconductor laser in which the end of a resonator can be used as a current non-injection region by easily etching and removing the p-side electrode of a portion near at least one end surface of the resonator, and the roughness of an etching surface at the time of dry-etching is not produced. SOLUTION: A metal laminated film whose bottom layer comprises a Pd film 16 and whose top layer comprises a Pt film 17 is formed in the shape of a stripe on a GaN semiconductor layer 12 which forms a laser structure. A ridge stripe 18 is formed by carrying out the dry-etching of the GaN semiconductor layer 12 using the metal laminated film as an etching mask. On this occasion, the Pt film 17 is made to be virtually removed at an etching completion time point. Then, a portion other than a portion for use as a p-side electrode of the Pd film 16 and the remaining Pt film 17 is removed by carrying out wet-etching using aqua regia. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor light emitting device which has superior luminous properties, is very reliable, and has a long service life. SOLUTION: A method of manufacturing the semiconductor light emitting device comprises a first step of enabling a nitride III-V compound semiconductor layer forming a light emitting device structure to grow on a nitride III-V compound semiconductor substrate where a plurality of second regions having a second average dislocation density higher than a first average dislocation density possessed by a first crystal region are regularly arranged in an array in the first crystal region and a second step of scribing the nitride III-V compound semiconductor substrate on which the nitride III-V compound semiconductor layer is grown along an outline containing a straight line drawn between the two adjacent second regions. COPYRIGHT: (C)2004,JPO