摘要:
A liquid crystal display panel of the invention is such that, in a pixel region defined by a region of the array substrate surrounded by a pair of image signal lines and a pair of scanning signal lines, of a line-shaped pixel electrode and a common electrode, the electrode that is disposed adjacent to and parallel to a signal line is made of an opaque conductor and at least one of the other electrodes is made of a transparent conductor. Adverse effects of the electric field formed between a signal line and an adjacent electrode thereto are suppressed and a sufficient aperture ratio is ensured by using a transparent conductor for the electrode contributing good display.
摘要:
There are disclosed a silicon seed crystal which is composed of silicon single crystal and used for the Czochralski method, wherein oxygen concentration in the seed crystal is 15 ppma (JEIDA) or less, a silicon seed crystal which is used for the Czochralski method, wherein the silicon seed crystal does not have a straight body, and a method for producing a silicon single crystal by the Czochralski method comprising using said seed crystal, bringing a tip end of the seed crystal into contact with a silicon melt to melt the tip end of the seed crystal, with or without performing necking operation, and growing a silicon single crystal. The method is capable of improving the rate of success in making crystals dislocation-free and the productivity of single crystal rods regardless of the use of necking operation.
摘要:
Disclosed is a liquid crystal display comprising: a pair of opposed substrates; a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer having a display alignment state and a non-display alignment state which differ from each other and being subjected to an initialization process so as to be changed from the non-display alignment state to the display alignment state before an image is displayed; storage capacitor electrodes provided on one of the pair of substrates; pixel electrodes provided so as to overlap with the storage capacitor electrodes with an insulator interposed therebetween and disposed between the storage capacitor electrode and the liquid crystal layer, the pixel electrode having a lack portion in a region overlapping with the storage capacitor electrode; and drive means for generating potential difference between the storage capacitor electrode and the pixel electrode to thereby perform the initialization process.
摘要:
A piezoelectric ceramic composition capable of obtaining a piezoelectric member that can provide a sufficient sintering density even by firing at a low temperature besides only allowing small amount of Pb to be evaporated by firing to reduce deterioration of electrical characteristics, wherein the piezoelectric member comprises a perovskite structure oxide of the piezoelectric ceramic composition containing Pb, Ti, Zr, Ma (Ma represents at least one of Cr, Mn, Fe and Co) and Md (Md represents at least one of Nb, Sb, Ta and W), and wherein a represents the total content (in mole) of Ma, and b, c, d and e (in mole) represent the contents of Sb, Nb, Ta and W, respectively, and 0.50
摘要:
There is disclosed a method for producing a silicon single crystal by growing the silicon single crystal by the Czochralski method, characterized in that the crystal is pulled at a pulling rate [mm/min] within a range of from V1 to V1+0.062×G while the crystal is doped with nitrogen during the growing, where G [K/mm] represents an average temperature gradient along the crystal growing direction, which is for a temperature range of from the melting point of silicon to 1400° C., and provided in an apparatus used for the crystal growing, and V1 [mm/min] represents a pulling rate at which an OSF ring disappears at the center of the crystal when the crystal is pulled by gradually decreasing the pulling rate. The method of the present invention can produce silicon single crystal wafers exhibiting an extremely low defect density over the entire plane of the crystal, in particular, with no small pits, and having an excellent oxide dielectric breakdown voltage, based on the CZ method under widely and easily controllable production conditions at a high production rate and high productivity.
摘要:
A single crystal is grown in accordance with a Czochralski method such that the time for passing through a temperature zone of 1150-1080.degree. C. is 20 minutes or less, or such that the length of a portion of the single crystal corresponding to the temperature zone of 1150-1080.degree. C. in the temperature distribution is 2.0 cm or less. Alternatively, the single crystal is grown such that the time for passing through a temperature zone of 1250-1200.degree. C. is 20 minutes or less, or such that the length of a portion of the single crystal corresponding to the temperature zone of 1250-1200.degree. C. in the temperature distribution is 2.0 cm or less. This method decreases both the density and size of so-called grown-in defects such as FPD (100 defects/cm.sup.2 or less), LSTD, and COP (10 defects/cm.sup.2 or less) to thereby enable efficient production of a single crystal having an excellent good chip yield (80% or greater) in terms of oxide dielectric breakdown voltage characteristics.
摘要翻译:根据切克劳斯斯基方法生长单晶,使得通过1150-1080℃的温度区的时间为20分钟或更短,或者使得单晶的一部分的长度对应于温度 1150-1080℃的区域的温度分布为2.0cm以下。 或者,单晶生长使得通过1250-1200℃的温度区的时间为20分钟或更短,或者使得对应于1250℃的温度区的单晶的一部分的长度, 1200℃,温度分布为2.0cm以下。 该方法既降低FPD(100个缺陷/ cm 2以下),LSTD,COP(10个缺陷/ cm 2以下)等所谓的内置缺陷的密度和尺寸,能够有效地制造具有 在氧化物绝缘击穿电压特性方面,极好的芯片产量(80%以上)优异。
摘要:
There is disclosed a method for producing a silicon single crystal wafer wherein a silicon single crystal is grown in accordance with the CZ method with doping nitrogen in an N-region in a defect distribution chart which shows a defect distribution in which the horizontal axis represents a radial distance D (mm) from the center of the crystal and the vertical axis represent a value of F/G (mm.sup.2 /.degree. C..multidot.min), where F is a pulling rate (mm/min) of the single crystal, and G is an average intra-crystal temperature gradient (.degree. C./mm) along the pulling direction within a temperature range of the melting point of silicon to 1400.degree. C. There can be provided a method of producing a silicon single crystal wafer consisting of N-region where neither V-rich region nor I-rich region is present in the entire surface of the crystal by CZ method, under the condition that can be controlled easily in a wide range, in high yield, and in high productivity.
摘要:
A method for producing a silicon single crystal in accordance with the Czochralski method. The single crystal is grown in an N.sub.2 (V) region where a large amount of precipitated oxygen and which is located within an N region located outside an OSF ring region, or is grown in a region including the OSF ring region, N.sub.1 (V) and N.sub.2 (V) regions located inside and outside the OSF ring region, in a defect distribution chart which shows a defect distribution in which the horizontal axis represents a radial distance D (mm) from the center of the crystal and the vertical axis represents a value of F/G (mm.sup.2 /.degree.C..multidot.min), where F is a pulling rate (mm/min) of the single crystal, and G is an average intra-crystal temperature gradient (.degree.C./mm) along the pulling direction within a temperature range of the melting point of silicon to 1400.degree. C. The method allows production of silicon single crystal wafers in which neither FPDs nor L/D defects exist on the wafer surface, and gettering capability stemming from oxygen precipitation is provided over the entire wafer surface, and silicon single crystal wafers wherein OSF nuclei exit but no OSF ring appears when the wafer is subjected to thermal oxidation treatment, neither FPDs nor L/D defects exist on the wafer surface, and gettering capability is provided over the entire wafer surface.
摘要:
There is disclosed a high heat resistant aluminum alloy impeller, which is suitably used as an impeller, especially for a centrifugal compressor, and for the rotor and the blade of a turbo molecular pump or the scroll of a scroll compressor. Also, a method for manufacturing this aluminum alloy impeller is disclosed. The impeller is composed of an Al--Fe rapid solidification aluminum alloy, which is produced by a spray forming process for spraying a molten metal with inert gas and rapidly solidifying the metal at a cooling speed of 10.sup.2 .degree. C./sec. or higher while simultaneously deposing the metal. The rapid solidification aluminum alloy is subjected to hot extrusion processing within a temperature range of 200.degree. C. to 600.degree. C. and further subjected to hot forging.
摘要:
In a crystal pulling method in which a growing single crystal is initially pulled by a seed chuck and subsequently pulled by lifting jig in the middle of the pulling operation, the speed Va of the seed chuck relative to the lifting jig is decreased, while the rising speed Vb of the lifting jig increases, from a first point where switching of the pulling mechanism from the seed chuck to the lifting jig is started. The total speed Vt=Vb+Va is constantly maintained at a desired pulling speed V up to a third point where the shifting of the load from the seed chuck to the lifting jig is started. Subsequently, the total speed Vt is made less than the desired pulling speed V from the third point where the shifting of the load from the seed shuck to the lifting jig is started. This enables accurate growth of a crystal.