摘要:
The invention provides a manufacturing method of a laser diode having buried grown layer with less crystal defects and with low consumption power and having high reliability in a buried heterostructure laser diode using an InGaAlAs type material as an active layer, by preventing the inhibition of burying and regrowing of the active layer caused by oxidation of Al contained in the active layer. A manufacturing method of a semiconductor laser diode and the active layer comprises a material at least containing Al and having a buried hetero-cross sectional structure, formation of the buried heterostructure, comprising the steps of fabricating the active layer into a stripe shape or mesa shape by etching including at least wet etching, cleaning the stripe-shape sidewall of the core layer with a gas containing chlorine or other halogen element in a crystal growing apparatus and burying the active layer in the semiconductor.
摘要:
In order to form a wavelength tunable laser capable of tuning a wave over a wide range by simple control means, a thin film heater is mounted either over an upper electrode of a ridge waveguide semiconductor laser having ridge waveguides on a semiconductor substrate or over the semiconductor substrate and on both sides of the ridge waveguide with a gap of a few &mgr;m. By controlling a current passed to the thin film heater, the oscillation wavelength of the semiconductor laser is tuned. In the case where the thin film heater is mounted over an upper electrode of a ridge waveguide, a nonconductor is formed on both sides of the ridge conductor to more efficiently enable heat from the heater to reach an active layer of the ridge waveguide more efficiently.
摘要:
The present invention relates to novel Aerothricins represented by the Formula (I), wherein R1, R2, R3, R4, R5, X, Y, Z, and m are as defined in Claim 1; and pharmaceutically acceptable salts thereof. The present invention also relates to a pharmaceutical composition comprising an Aerothricin of the Formula (I) and a pharmaceutically acceptable carrier. Furthermore, the present invention relates to the use of such Aerothricins for the preparation of medicaments, as well as to processes and intermediates for the preparation of the Aerothricins of the Formula (I).
摘要:
An optical disc having an aluminum reflective film is disclosed, wherein an oxide of Al in the stable oxidized state is introduced into the Al reflective film to eliminate changes with lapse of time to improve durability of the optical disc. A method for producing a reflective film on an optical disc is also disclosed, wherein a trace amount of oxygen is introduced into atmosphere in the course of formation of the reflective film.
摘要:
A process for producing a composite laminate comprising a insert part and an injection-molded resin part by coating the insert part with a primer comprising a copolymer aqueous emulsion having a glass transition point of not higher than 20.degree. C. which is obtained by emulsion polymerization of a monomer mixture consisting mainly of (a) from 35 to 75% by weight of an alkyl acrylate having from 1 to 8 carbon atoms in the alkyl moiety thereof, (b) from 10 to 50% by weight of an alkyl methacrylate having from 1 to 4 carbon atoms in the alkyl moiety thereof, (c) up to 15% by weight of styrene and/or acrylonitrile, the sum of the (b) and (c) components ranging from 15 to 55% by weight, (d) up to 5% by weight of a vinyl monomer selected from the group consisting of an .alpha.,.beta.-unsaturated acid or an anhydride thereof, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, (meth)acrylamide, and methylol(meth)acrylamide, and (e) up to 30% by weight of other vinyl monomer(s), drying the primer, inserting the insert part into a cavity of an injection mold, injecting a molten resin into the cavity to thereby unite the insert part and the injected resin molded part into one body. The composite laminate is resistant to thermal shocks or electrical shocks.
摘要:
This invention relates to a manufacturing process for plate or forging (bar, stamp work or the like) of ferrite-austenite two-phase stainless steel, containing C at 0.03% or below, Si at 2.0% or below, Mn at 2.0% or below, Cr at 25 to 35%, Ni at 6 to 15%, N at 0.35% or below, and Fe and inevitable impurity for the remainder with or without adding B at 0.001 to 0.030% with the following nickel balance value specified at -3 to -9 and comprising an average crystal grain size at 0.015 mm or below from heating an ingot of the above mentioned ferrite-austenite two-phase stainless steel at 1,200.degree. C. or below and keeping a forging ratio by hot working at 5 or over.Ni balance value=Ni %+0.5 Mn %+30.times.(C+N) %-1.1(Cr %+1.5 Si %)+8.2
摘要:
A method of automatically adjusting focus conditions of photographic optical system is disclosed. In the method at least a part of optical image formed on a predetermined focal plane by an optical system is projected onto first and second photocell arrays in the front and the rear of a surface conjugated to the predetermined focal plane, and onto at least one of other photocell arrays arranged between the first and second photocell arrays. Outputs of first, second and other photocell arrays are arithmetically operated in accordance with respective given evaluation functions thereby obtaining first, second and other evaluation values. These evaluation values are compared with each other and the optical system is intermittently shifted in the optical axis direction with first or second moving step in the case of decision from the compared result that the optical system is positioned within or outside a predetermined range including the in-focused position.
摘要:
A picture image information band compression and transmission process includes the steps of providing one set of three scanning lines making information of the first scanning line of each one set as an estimation scanning line, estimating a picture element to be estimated by four consecutive picture elements, preparing estimated picture image informations, and translating the estimation reference scanning line and two estimated picture image information into run length codes and into mode codes, respectively, and compressing and transmitting the run length codes.
摘要:
An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.