摘要:
A semiconductor device comprises a semi-conductor chip bonded on a top surface inside a case electrode by a bonding material and a lead electrode bonded on a top surface of the semiconductor chip by a bonding material with a space of the case electrode filled with an insulating material for sealing the bonded sections, wherein a groove is provided on a top surface of the case electrode from an edge of the semiconductor chip, to thereby reduce heat distortion which is generated on a large scale at an end of the bonding material on account of a difference in coefficients of linear thermal expansion between the semiconductor chip and the case electrode and improve the thermal fatigue life.
摘要:
A method of straightening a wire rod of titanium or titanium alloy wherein the rod is hot-straightened to a straight rod at the straightening temperature T and elongation .epsilon. satisfying the expression (1) or (2). The method includes hot rolling a titanium billet of .beta. titanium alloy, (.alpha.+.beta.) titanium alloy or a near .alpha. titanium alloy into a wire rod, winding the hot rolled wire rod into a coil, cold drawing the wire rod, cutting the wire rod to obtain a bent wire rod, heating the bent wire rod to a straightening temperature T while both end portions of the bent wire rod are fixed, applying a predetermined elongation .epsilon. to the wire rod, maintaining a straightening temperature T, hot-straightening the wire in accordance with the expression (2).epsilon.(T-400).gtoreq.400 (1).epsilon.(T-500).gtoreq.200 (2)and cooling the wire rod while applying tension. The method is suitable for preparing a straight rod for use in an engine valve.
摘要:
The heat-resisting material according to the present invention comprises a fiber aggregate containing crystalline alumina short fibers and formed in a continuous length and an inflammable sheathing for maintaining the shape of the fiber aggregate in a compressed state. The expansion percentage of the fiber aggregate after burn-off of the sheathing is not less than 10% by volume based on the volume of fiber aggregate in a compressed state. This heat-resisting material can be worked into various forms of product of the heat-resisting material such as rope, square bar, sheet, etc., according to the purpose of use. The present heat-resisting material is provided in continuously long products, has high heat resistance and restoring property, and can be easily applied to the openings or spaces ranged continuously in the longitudinal direction, such as the boundaries between the blocks of the heat-resisting material and joints.
摘要:
An apparatus for displaying an ultrasonic three-dimensional image of a living body including an ultrasonic vibrating element arranged at a distal end of an ultrasonic probe rotatably and linearly movable, a motor for rotating the ultrasonic vibrating element to perform a radial scan on a first cross section, and a stepping motor for linearly moving the ultrasonic vibrating element along a longitudinal axis of the probe to perform a linear scan. By performing the radial scan and linear scan, echo data of a three-dimensional region is picked-up. Prior to picking-up the echo data, the ultrasonic vibrating element is rotated to effect only the radial scan at a cross sectional position at a middle point between a linear scan range, so that a B-mode ultrasonic image is displayed on a monitor. Prior to the picking-up of the echo data, a cross sectional position is set, and during the picking-up of the echo data, the echo data is processed in accordance with the previously set cross sectional position. A marker may be displayed in superimposition upon the B-mode ultrasonic image, so that an operator can confirm whether or not a region of interest can be contained in the displayed three-dimensional image easily and promptly.
摘要:
A method for producing a snack food from fruits and vegetables which comprises washing, paring and if necessary coring the fruit material or vegetable material and cutting it into pieces; if necessary inactivating oxidase contained therein by chemical treatment or heat treatment; frying the pieces in a vacuum or under atmospheric pressure; and cooling the fried pieces in a vacuum. The natural taste and tint of material is preserved, and the product of the method is agreeable to the palate.