摘要:
In a semiconductor laser which uses a semiconductor of GaN type compound, an optimism material is used for a current blocking layer, so that it is made possible to obtain a semiconductor laser that satisfies a gain guiding structure of high light emitting efficiency or a refractive index guiding structure or both, thereby facilitating control of the noise of oscillated light (reduction of noise), control of the spread of light in lateral direction, and control of the longitudinal mode.
摘要:
A semiconductor memory device in which a stored information can be simply erased only by an electric signal so as to be rewritten is provided. The semiconductor memory device includes: (a) a semiconductor chip having an array of memory cells, stored information in the memory cells being erasable by light irradiation; (b) a light emitting element irradiating a light into the memory cells portion of the semiconductor chip; and (c) a package in which the semiconductor chip and the light emitting element are encapsulated with a resin in one body.
摘要:
A semiconductor memory device in which a stored information can be simply erased only by an electric signal so as to be rewritten is provided. The semiconductor memory device includes (a) a semiconductor chip having an array of memory cells, stored information in the memory cells being erasable by light irradiation; (b) a light emitting element irradiating a light into the memory cells portion of the semiconductor chip; and (c) a package in which the semiconductor chip and the light emitting element are encapsulated with a resin in one body.
摘要:
In a semiconductor laser which uses a semiconductor of GaN type compound, an optimum material is used for a current blocking layer, so that it is made possible to obtain a semiconductor laser that satisfies a gain guiding structure of high light emitting efficiency or a refractive index guiding structure or both, thereby facilitating control of the noise of oscillated light (reduction of noise), control of the spread of light in lateral direction, and control of the longitudinal mode.
摘要:
In a semiconductor laser which uses a semiconductor of GaN type compound, an optimum material is used for a current blocking layer, so that it is made possible to obtain a semiconductor laser that satisfies a gain guiding structure of high light emitting efficiency or a refractive index guiding structure or both, thereby facilitating control of the noise of oscillated light (reduction of noise), control of the spread of light in lateral direction, and control of the longitudinal mode.
摘要:
By (a) performing a first treatment process to a substrate in a first apparatus, (b) moving the substrate having undergone the first treatment process into an airtight passage communicating with the first apparatus and shut off from outside and thereafter, shutting off the communication between the passage and the first apparatus, (c) setting the passage to communicate with a second apparatus to move the substrate into the second apparatus, and (d) performing a second treatment process in the second apparatus, the treatment processes are performed in treatment apparatuses suitable therefor without the substrate being exposed to the outside air. As a result, the time between the treatment processes is reduced and the availability ratio of the expensive equipment is improved.
摘要:
A semiconductor light emitting device of double hetero junction includes an active layer and clad layers. The clad layers include an n-type layer and p-type layer. The clad layers sandwich the active layer. A band gap energy of the clad layers is larger than that of the active layer. The band gap energy of the n-type clad layer is smaller than of the p-type clad layer.
摘要:
The present invention provides a nitride semiconductor light-emitting device capable of preventing shortening of the device lifetime due to increase in the driving voltage of the device and internal heat generation, and also providing uniform laser characteristics, even if the device has a ridge stripe structure. On a GaN substrate 1, an n-type GaN layer 2, an n-type AlGaN layer 3, an active layer 4, a p-type AlGan layer 5 and a p-type GaN layer 6 are laminated sequentially. On the p-type GaN layer 6, an insulating film 7 and a transparent electrode 8 are formed. A portion of the transparent electrode 8 is formed in contact with the p-type GaN layer 6. A ridge stripe portion D to form a waveguide is configured of a transparent film 9. A region, where the transparent electrode 8 and the p-type GaN layer 6 are in contact with each other, serves as a stripe-shaped current injection region.
摘要:
A semiconductor light emitter (A) includes an n-type semiconductor layer (2), a p-type semiconductor layer (4), and an active layer (3) between these two layers (2, 4). The light emitter (A) further includes an n-side electrode (5) on the n-type layer (2) and a p-side electrode (6) on the p-type layer (4). An insulating layer (7) covers the n-type and p-type layers (2),(4), while also partially covering the n-side and p-side electrodes (5),(6), leaving part of the electrodes (5, 6) exposed. The n-side electrode (5) has a first Al layer (51) formed on the n-type layer (2) and a second Ni, W, Zr or Pt layer (52) formed on the first layer (51). The p-side electrode (6) has a first Au layer (61) formed on the p-type layer (4), and a second Ni, W, Zr or Pt layer (62) formed on the first layer (61).
摘要:
The present invention provides a method of manufacturing a nitride semiconductor capable of improving the crystallinity and the surface state of the nitride semiconductor crystal formed on top of a high-temperature AlN buffer layer. An AlN buffer layer is formed on top of a growth substrate, and then nitride semiconductor crystals are grown on top of the AlN buffer layer. In a stage of manufacturing the nitride semiconductor, the crystal of the AlN buffer layer is grown at a high temperature of 900° C. or higher. In addition, an Al-source material of the AlN buffer layer is started to be supplied first to a reaction chamber and continues to be supplied without interruption, and then a N-source material is supplied intermittently.