摘要:
The average film thickness of an amorphous silicon film formed on a substrate is measured. Then, the amorphous silicon film is irradiated with a laser beam to form a polysilicon film. The grain size distribution of the polysilicon film is measured. An optimum value of energy density of laser beam irradiation is calculated on the basis of grain size values measured at two points A and B of the polysilicon film. Then, the average film thickness of a next amorphous silicon film is measured. A value of energy density of laser beam irradiation is calculated on the basis of the average film thickness of the next amorphous silicon film and the average film thickness of the previous amorphous silicon film. The value of energy density is fed back to a laser beam irradiation system. As described above, the energy density of laser beam irradiation to be applied on a silicon film formed on a substrate is controlled in accordance with the film thickness of the silicon film whenever the film thickness of the silicon film is measured. Accordingly, polysilicon uniform and large in grain size can be formed on the whole surface of a large-size substrate. As a result, polysilicon TFTs can be formed in a large area.
摘要:
The present invention provides a process for producing a polycrystal silicon film which comprises a step of forming a polycrystal silicon film by light irradiation of a silicon film set on a substrate, and a step of selecting substrate samples having an average grain size in a plane of the sample of 500 nm or more. According to the present invention, stable production of a high-performance poly-silicon TFT liquid crystal display becomes possible.
摘要:
The present invention provides a metal halide lamp having a ceramic arc tube vessel that includes a discharge arc tube member and thin tube members, the discharge arc tube member including taper parts and a main tube part in the middle in a longitudinal direction, the taper parts and the main tube part having a larger outside diameter than an outside diameter of ends of the discharge arc tube in a longitudinal direction, and the thin tube members each being fit to the respective ends of the discharge arc tube, where a minimum curvature radius R is set to be 0.3 mm or more at each transitional area of an external surface between each taper part and a corresponding end of the discharge arc tube.
摘要:
The present invention provides a process for producing a polycrystal silicon film which comprises a step of forming a polycrystal silicon film by light irraditation of a silicon film set on a substrate, and a step of selecting substrate samples having an average grain size in a plane of the sample of 500 nm or more. According to the present invention, stable production of a high-performance poly-silicon TFT liquid crystal display becomes possible.
摘要:
In a compressor system, in which plural numbers of compressors are connected in parallel with, wherein flow rate of all the compressor main bodies driven under load operating condition is decreased down by closing each of the inlet guide vanes thereof, when a load of the compressor goes down, and then the compressor rushing into surge at the earliest is brought into unload operating condition. Thereafter, the flow rates of the compressors other than that brought into the un-load operating conditions are increased up, thereby conducting the operation of the compressor depending upon the load.
摘要:
A semiconductor substrate has a peculiar crystal defect. Crystal defects in a fixed area of a substrate can be treated as data acquired by coding the distribution of the crystal defects. The coded data is utilized for certificate data of an IC card by identifying a semiconductor substrate itself.
摘要:
A defect inspection apparatus for detecting defects existing on a surface of a semiconductor sample and/or inside the sample based on light information from the sample obtained by irradiating a light beam onto the sample is provided, which comprises a detecting means for detecting positions in the depth direction where the defects exist and distribution of the defects based on the light information; a setting means for setting a position in the depth direction where defects exist; and a means for displaying the distribution of the defects obtained by the detecting means, the displaying means displaying the distribution of the defects corresponding to the position in the depth direction set by the setting means.
摘要:
A discharge tube is provided inside an outer tube. At least a pair of electrodes is arranged inside the discharge tube, and at least mercury is sealed into the discharge tube. The electrode includes an electrode pin and a metal pipe that surrounds the electrode pin. Because a contact area of the electrode pin and the inner surface of the metal pipe is sufficiently maintained in a stable manner, a tip temperature of the electrode pin can be lowered sufficiently without a variation. As a result, it is possible to obtain a high pressure discharge lamp that has excellent lifetime characteristics and can considerably reduce the variation of the lifetime characteristics between lamps.
摘要:
A defect assessing apparatus and method and a semiconductor manufacturing method for revealing the relationship between the size and depth of defects is disclosed. A detecting optical system is provided for detecting the intensity of scattered light from a defect generated by the shorter wavelength one of the light rays of at least two different wavelengths emitted from irradiating optical systems and that of scattered light from the defect generated by the longer wavelength one of same. A calculating means is provided for determining, from the scattered light intensity derived from the shorter wavelength ray and that derived form the longer wavelength ray, both detected by the detecting optical system, a value corresponding to the defect size and another value corresponding to the defect depth. A display means is provided for displaying a distribution revealing the relationship between defect size and defect depth on the basis of the value corresponding to the defect size and the value corresponding to the defect depth, both determined by the calculating means.
摘要:
A method of making a semiconductor integrated circuit provided with an isolating region constituted of an upper and lower isolating regions, and integrated circuit element regions is disclosed, wherein: the lower isolating region is diffused upward to a depth of a little more than half the thickness of an epitaxial layer to link with the upper isolating region prior to a doping of the upper isolating region; the doping of the lower isolating region and integrated circuit element regions, is implemented by means of ion implantation through a resist film which is capable of blocking ions implanted and in which specified doping windows have been formed in advance, and a SiO.sub.2 film is used as a reference mask in an ion implanting step, and the respective borders of the upper isolating region and the specified regions of the circuit elements is determined by self-alignment. The method has advantages that the upper isolating region can be prepared by heat-treatment for relatively short time, reducing lateral diffusion and the occupied area thereof, and slippage by masking is remarkably reduced, providing a semiconductor integrated circuit with high density.