Abstract: A wiring board for a semiconductor package comprises a base substrate having first and second surfaces; a wiring layer consisting of necessary wiring patterns formed on at least one of the first and second surfaces; a plurality of semiconductor element mounting areas formed on the surface of the base substrate on which the wiring layer is formed; and individual patterns as position information provided for the respective semiconductor element mounting areas, the individual patterns having a particular shape for the respective semiconductor element mounting area. The individual patterns as position information are formed on peripheral regions of the respective semiconductor element mounting areas.

Abstract: A method for producing a wiring board for a semiconductor package having a base substrate with first and second surfaces; a wiring layer including wiring patterns formed on at least one of the first and second surfaces; a plurality of semiconductor element mounting areas formed on the surface of the base substrate on which the wiring layer is formed; and individual patterns as position information formed for the respective semiconductor element mounting areas, the individual patterns having a different shape for each of the respective semiconductor element mounting areas. The individual patterns as position information are formed on peripheral regions of the respective semiconductor element mounting areas.

Abstract: A fundamental laser beam to is wavelength converted through nonlinear optical crystals by traveling in one direction, sequentially through two nonlinear optical crystals arranged in series. A wavelength-converted laser beam is generated and includes wavelength-converted laser beams having polarized directions differing from each other by angles in a range from 45° to 90°. The two nonlinear optical crystals have crystal orientation axes differing by 45° to 90° when viewed along the optical axis of the laser beam.

Abstract: A sense amplifier has a pair of internal nodes that are precharged to a power-supply level. A first pair of n-channel transistors supplies current to the internal nodes responsive to a pair of data signals, both of which are initially high. When one of the data signals begins falling toward the low level, the corresponding n-channel transistor immediately reduces the current supplied to one of the internal nodes. A second pair of n-channel transistors, cross-coupled to the internal nodes, amplifies the resulting potential difference between the internal nodes, thereby pulling down the potential of one of the internal nodes. An output signal is generated from one or both of the internal nodes. The output signal is obtained quickly, because amplification begins without delay.

Abstract: A display device 1 has a light source 8, a scattering member for scattering light from the light source, an image plate 10 for transmitting the light scattered by the scattering plate and an optics 3 having a lens for focusing light from the image plate and transmitting the light to an eye of the viewer. According to the device, the image is focused on or around the pupil in the Maxwellian view condition, allowing even the myoptic and hyperoptic person to see the displayed image clearly.

Abstract: The laser heat treatment of an amorphous or polycrystalline silicon film material is conducted by forming a laser beam generated from a pulse laser source having a wavelength of 350 nm to 800 nm into a linear beam having a width and a length, and directing the linear beam onto a film material formed on a substrate.

Abstract: A display device 1 for projecting images of an imaging plate 9 into a retina 14 of an eye 7 of a viewer 2 has a light source 8, a scattering plate 9 for scattering the light from the light source, an imaging plate 10 for transmitting the light scattered by the scattering plate, and an optical unit with a lens 11 for focusing the light transmitted through the imaging plate into an eye of the viewer, wherein the scattering plate is positioned so that it can move between the light source and the imaging plate.

Abstract: A laser optical system for directing a rectangular laser beam onto an amorphous or polycrystalline silicon film comprises linear beam forming means for forming the laser beams radiated from a plurality of laser oscillators linearly to be applied on the silicon film, the optical axes of the laser beams from the laser oscillators to linear beam forming means on the almost same plane, and linear beams are arrayed with a certain interval linearly on the amorphous or polycrystalline silicon film formed on a substrate. By providing the interval between the radiating laser beams, the laser optical system comprising the plurality of linear beam forming means can be arranged with a distance, thereby preventing the interference between optical parts.

Abstract: A laser optical system includes a linear beam forming member for forming laser beams radiated from laser oscillators into a linear beam shape on a silicon film on a substrate. The laser optical system is arranged so that the optical axes of laser beams from the laser oscillators to the linear beam forming member are in substantially the same plane and substantially perpendicular to the substrate. Each laser beam is reflected from a reflecting mirror and applied to the silicon film on the substrate. Since the laser beams are applied to the substrate at the same time, the area irradiated can be increased, while each radiating laser beam maintains a required radiation intensity, resulting in high productivity.

Abstract: A display unit includes a plurality of panels joined to each other into one display screen. Each of the panels is formed by using organic EL devices. In this display unit, a seal material is applied to a joint portion between adjacent two of the panels in such a manner as to cover the joint portion, to thereby suppress permeation of moisture, air, and the like in the organic EL devices.

Abstract: A wiring board for a semiconductor package comprises a base substrate having first and second surfaces; a wiring layer consisting of necessary wiring patterns formed on at least one of the first and second surfaces; a plurality of semiconductor element mounting areas formed on the surface of the base substrate on which the wiring layer is formed; and individual patterns as position information provided for the respective semiconductor element mounting areas, the individual patterns having a particular shape for the respective semiconductor element mounting area. The individual patterns as position information are formed on peripheral regions of the respective semiconductor element mounting areas.

Abstract: In a heat transfer pipe, annular grooves in a direction inclined at an angle of 45° to 90° with respect to an axis of the pipe are continuously formed at an interval in a longitudinal direction of the pipe. The annular grooves desirably have a groove depth of 0.20 mm or more, and a groove pitch of two to five times larger than the groove depth. Moreover, a ratio W/P of a bottom width W of projections of the grooves to the groove pitch P is desirably 0.1 to 0.9.

Abstract: A four-row tapered roller bearing is incorporated in the clearance between the inner surface of a housing and the outer surface of a rolling roller. A pair of supporting members supporting sensor devices are fitted in and supported by a part of the inner surface of the housing in such a manner that they are opposed to the ends of outer rings of the four-row tapered roller bearing disposed close to the both axial ends thereof. The sensor devices each comprise a distortion gauge as a detecting portion and a first coil for transmitting as a wireless signal a signal obtained by processing an output signal outputted from the distortion gauge. A second coil for receiving the wireless signal transmitted by the first coil is retained on a part of a member other than the supporting members.

Abstract: The present invention provides a wiping material for a vacuum chamber having sufficient sludge wiping properties and water retention attained by easy control over cell diameter and use of a polyurethane foam which has been foamed free from a silicone-based surface active agent and a process for the production thereof. A wiping material made of a polyurethane foam for a vacuum chamber for use in the preparation of a silicon wafer is described, wherein the polyurethane foam is free of silicone and has an open-cell structure comprising cells the diameter of which are controlled to fall within the range of from 500 &mgr;m to 3,000 &mgr;m.

Abstract: The laser heat treatment of an amorphous or polycrystalline silicon film material is conducted by forming a laser beam generated from a pulse laser source having a wavelength of 350 nm to 800 nm into a linear beam having a width and a length, and directing the linear beam onto a film material formed on a substrate.

Abstract: A grasping forceps for an endoscope according to the present invention comprises a flexible insertion section, an operating wire passing through said insertion section and adapted to be advanced and retreated in accordance with an operation of an operating section connected to a hand side end of the operating wire, and an elastic grasping section arranged in the leading end portion of said operating wire and composed of at least four elastic grasping members different in length having a habit of so flexing that leading end grasping portions formed at the leading ends of said elastic grasping members spread outwards from a center axis of said insertion section, wherein the leading end grasping portions formed at the leading ends of the plurality of elastic grasping members different in length are spread in a spiral arrangement at the time of spreading of the elastic grasping section.

Abstract: Into a raceway groove formed between outer and inner races, there are incorporated a plurality of rolling elements of which outside diameters serving as the rolling contact surfaces thereof each has a curvature in the axial direction as well and also each of which has a radius smaller than the radius of the raceway surfaces of the outer and inner races. The rolling elements are arranged in such a manner that the mutually adjoining rolling elements cross each other alternately and also that the outside diameters of the respective rolling elements are always contacted at two points with the raceway surfaces of one race and the raceway surfaces of the other race.

Abstract: A chopper type comparator includes an input switch circuit which inputs an input voltage and a reference voltage alternately in response to a control signal; and an output terminal which supplies an output voltage, having a level defined based on the difference between the input voltage and the reference voltage. The comparator further a MOS transistor operating in response to a control signal, and a timing control circuit which provide a delay to the control signal to be supplied to the first MOS transistor and the input switch circuit.

Abstract: A chopper type comparator includes an input switch circuit which inputs an input voltage and a reference voltage alternately in response to a control signal; and an output terminal which supplies an output voltage, having a level defined based on the difference between the input voltage and the reference voltage. The comparator further a MOS transistor operating in response to a control signal, and a timing control circuit which provide a delay to the control signal to be supplied to the first MOS transistor and the input switch circuit.

Abstract: The laser heat treatment of an amorphous or polycrystalline silicon film material is conducted by forming a laser beam generated from a pulse laser source having a wavelength of 350 nm to 800 nm into a linear beam having a width and a length, and directing the linear beam onto a film material formed on a substrate.