摘要:
In order to grow a GaAs.sub.1-x P.sub.x fixed-composition layer of excellent quality, which has a predetermined composition x, over a GaAs or GaP single crystal substrate, a varied-composition layer is formed between the substrate and the fixed-composition layer. The varied-composition layer comprises at least two varied-composition layer portions and at least one fixed-composition layer portion with a predetermined thickness that is formed between the varied-composition layer portions, whereby dislocations caused by lattice mismatch with the GaP substrate are settled in the varied-composition layer portions and recovered in the fixed-composition layer portion between the varied-composition layer portions, thereby minimizing the dislocations, and thus making it possible to obtain a GaAs.sub.1-x P.sub.x layer of excellent crystal quality, which has a predetermined composition x.
摘要:
Semiconductor epitaxial wafers consisting of an epitaxial film and its substrate can be removed, in accordance with the present invention, from a substrate supporting component, without breaking the wafers into pieces after completion of vapor growth. The carbonaceous powder according to the present invention can greatly and effectively decrease the breaking of wafers, as compared with the conventional SiO.sub.2 or SiC-coated substrate supporting components.
摘要:
A shock absorbing device for a shoe sole according to the present invention comprises: an outer sole 2; a midsole M that is disposed above the outer sole 2; and a deformation element 3 disposed between the outer sole 2 and the midsole M. The deformation element 3 is joined to the bottom surface of the midsole M and is joined to the upper surface of the outer sole 2. The deformation element has a tubular part 30 in a flat tubular form, and Young's modulus of a material constituting the tubular part 30 is greater than both that of a material constituting the midsole M and that of a material constituting the outer sole 2. The tubular part has a lower portion that is curved so as to be convex downwards and thereby undergoes bending deformation due to a shock at landing.
摘要:
An erasable ink composition for writing on an impervious writing surface comprising an organic solvent, a resin, a pigment, and a separating agent which comprises a polyoxyethylene polyoxypropylene monoalkyl ether which is liquid at normal temperatures in an amount of 5-20% by weight, and optionally at least one organic compound selected from the group consisting of a carboxylic acid ester and a polyoxypropylene monoalkyl ether which is liquid at normal temperatures in an amount of 2-10% by weight in conjunction.
摘要:
In the boat growth method of the IIIb-Vb group compound, the quartz boat is tridymitized on at least the surface thereof so as to prevent wetting of the boat due to the melt of the compound and hence to enhance the yield of a single crystal.
摘要:
In a GaAs epitaxial wafer including, for example, two epitaxial layers having high and low carrier concentrations, the carrier concentration of the low carrier concentration layer is liable to greatly vary, so that wafers suitable for FETs and Schottky barrier diodes operated at UHF and SHF are produced at only a low yield. This drawback is eliminated by adjusting the heating temperature of GaAs substrate to 690.degree. to 730.degree. C. during the growth of the low carrier concentration layer.
摘要:
An epitaxial wafer of GaAs.sub.1-x P.sub.x has been doped with nitrogen and used for the production of light emitting diode (LED). The carrier concentration of the conventional GaAs.sub.1-x P.sub.x was from 3.times.10.sup.16 to 2.times.10.sup.17 /cm.sup.3.According to the present invention, the carrier concentration is reduced lower than the conventional concentration and the luminance of LED is increased approximately two or three times the conventional luminance.
摘要翻译:GaAs1-xPx的外延晶片已经掺杂氮气,用于生产发光二极管(LED)。 常规GaAs1-xPx的载流子浓度为3×10 16至2×10 17 / cm 3。 根据本发明,载流子浓度比常规浓度降低,并且LED的亮度增加约为传统亮度的两倍或三倍。