摘要:
The present invention relates to a method for the production of crystal layers or bulk crystals of group III nitride or of mixtures of different group III nitrides by means of precipitation, at a first temperature T1 in a first temperature range, from a group-III containing fused metal on a group-III-nitride crystal seed placed in the fused metal or on a foreign substrate placed in the fused metal, with the admixture of nitrogen in the fused metal at a pressure P.With the method a solvent additive is added to the fused metal which increases the conversion rate of group III metal to group III nitride in the fused metal. The fused metal runs through at least one temperature cycle with a first and a second process phase in which cycle the fused metal cools after the first process phase from the first temperature to a second temperature T2 below the first temperature range and at the end of the second process phase is heated from the second temperature back to a temperature within the first temperature range. The described method permits producing group III nitride crystal layers with a thickness of >10 μm, respectively massive crystals with a diameter of >10 mm at dislocation densities of
摘要翻译:本发明涉及通过在第一温度范围内的第一温度T1,从含III族氮化物的第III族氮化物的III族氮化物 将熔融金属放置在置于熔融金属中的第III族氮化物晶体种子上或置于熔融金属中的异质基底上,在熔融金属中以氮气的混合压力P。用该方法将溶剂添加剂 熔融金属,其增加熔融金属中III族金属与III族氮化物的转化率。 熔融金属穿过至少一个具有第一和第二工艺阶段的温度循环,其中熔融金属在第一工艺阶段之后从第一温度冷却到低于第一温度范围的第二温度T2, 第二工艺阶段从第二温度加热到第一温度范围内的温度。 所述方法允许在低于1100℃的温度下在≤108cm-2的位错密度下生产厚度>10μm的III族氮化物晶体层,分别为直径> 10mm的大块晶体,工艺压力低于5× 105 Pa
摘要:
A semi-conductor component test process, and a system for testing semi-conductor components, with which several different semi-conductor-component tests can be conducted in succession. A computer installation, in particular a test apparatus is provided, with which test result data obtained from a first test is evaluated, and which causes a further test provided after the first test), to be performed in an amended fashion, or to be dispensed with, depending on the test result data obtained from the first test.
摘要:
The invention involves a semi-conductor component testing process, and a system for testing semi-conductor components, in which a central computer device, in particular a central test apparatus is provided, with which test result data obtained from at least two separate tests is jointly evaluated, in particular by means of an appropriate pattern recognition process, which incorporates the test result data obtained from the separate tests into the analysis.
摘要:
The present invention relates to a preparation process for metal oxide nanotubes, the SiO2 nanotubes prepared by this process and the use of these nanotubes as catalyst supports. The invention especially concerns a supported catalyst system for polymerization of olefins, comprising a support made of fibers or a fleece of fibers.
摘要:
The present invention relates to new catalyst supports comprising nanofibers, a catalyst system comprising these supports as well as a process for preparing nanocomposites and the nanocomposites prepared. The invention especially concerns a supported catalyst system for polymerization of olefins, comprising a support made of fibers or a fleece of fibers, wherein the mean fiber diameter is less than 1000 nm, preferably less than 500 nm and the mean fiber length is more than 200,000 nm, preferably more than 500,000 nm and especially preferred more than 1,000,000 nm as well as a process for polymerizing olefinic systems in the presence of these catalyst systems and the resulting nanocomposites.
摘要:
The present invention relates to new catalyst supports comprising nanofibers, a catalyst system comprising these supports as well as a process for preparing nanocomposites and the nanocomposites prepared. The invention especially concerns a supported catalyst system for polymerization of olefins, comprising a support made of fibers or a fleece of fibers, wherein the mean fiber diameter is less than 1000 nm, preferably less than 500 nm and the mean fiber length is more than 200,000 nm, preferably more than 500,000 nm and especially preferred more than 1,000,000 nm as well as a process for polymerizing olefinic systems in the presence of these catalyst systems and the resulting nanocomposites.