摘要:
A resin-molding tablet for use in resin-molding semiconductor devices has a tablet body formed of powdered or particulate resin. The particles of the resin are compacted such as to form voids between adjacent particles. At least the outer peripheral region of the tablet is fused such that the resin particles are welded together to form a continuous layer of fine and impervious structure substantially free of open pores. The internal air trapped in the voids of the tablet is drawn and removed before the tablet is fused so that the tablet is substantially free of air. The tablet is produced by placing a particulate or powdered resin material in a vacuum vessel so as to allow the internal air in the resin material to be drawn outside, and then applying pressure and heat to the resin material so that at least the peripheral region of the mass of the particulate resin is fused to weld together. The tablet thus formed is melted and forcibly fed into a vacuum die cavity in which a semiconductor device to be molded is accommodated, thereby to hermetically seal the semiconductor device. Thus, a semiconductor package having substantially no voids is produced.
摘要:
A resin-molding tablet for use in resin-molding semiconductor devices has a tablet body formed of powdered or particulate resin. The particles of the resin are compacted such as to form voids between adjacent particles. At least the outer peripheral region of the tablet is fused such that the resin particles are welded together to form a continuous layer of fine and impervious structure substantially free of open pores. The internal air trapped in the voids of the tablet is drawn and removed before the tablet is fused so that the tablet is substantially free of air. The tablet is produced by placing a particulate or powdered resin material in a vacuum vessel so as to allow the internal air in the resin material to be drawn outside, and then applying pressure and heat to the resin material so that at least the peripheral region of the mass of the particulate resin is fused to weld together. The tablet thus formed is melted and forcibly fed into a vacuum die cavity in which a semiconductor device to be molded is accommodated, thereby to hermetically seal the semiconductor device. Thus, a semiconductor package having substantially no voids is produced.
摘要:
A resin sealing apparatus includes upper and lower dies each having a chase block with a plurality of cavities into which molten resin is injected and a supporting member for supporting the chase block, the chase blocks of the upper and lower dies being fitted to each other, and a position determining member attached to each of the chase blocks so that the positions of the chase blocks are determined when they are assembled, wherein each of the chase blocks is attached to each of the supporting members so as to be movable in the vertical and lateral directions within given ranges.
摘要:
A resin sealing apparatus includes upper and lower dies each having a chase block with a plurality of cavities into which molten resin is injected and a supporting member for supporting the chase block, the chase blocks of the upper and lower dies being fitted to each other, and a position determining member attached to a center block so that the positions of the chase blocks are determined when they are assembled, wherein each of the chase blocks is attached to each of the supporting members so as to be movable in the vertical and lateral directions within given ranges. The center block is provided on the supporting member and is disposed between two of the chase block with center plates interposed therebetween to form an integral unit.
摘要:
A pharmaceutical preparation for the percutaneous administration comprises eperisone or tolperisone, including salts thereof, and a monoglyceride of an aliphatic acid having 8 to 12 carbon atoms or/and an ester of lactic acid with an aliphatic alcohol having 12 to 18 carbon atoms. It is improved in the percutaneous absorption.
摘要:
A pharmaceutical preparation for the percutaneous administration comprises eperisone or tolperisone, including salts thereof, and a monoglyceride of an aliphatic acid having 8 to 12 carbon atoms or/and an ester of lactic acid with an aliphatic alcohol having 12 to 18 carbon atoms. It is improved in the percutaneous absorption.
摘要:
A telephone having a closure removably covering an operation panel on the body of the telephone, and automatic dialing push buttons arranged on the closure for performing an automatic dialing function. Depression of the push button on the closure becomes effective when the operation panel is covered with the closure. When the push button is depressed in this state, prestored telephone number data is automatically transmitted to telephone lines as dial signals.
摘要:
An apparatus for producing a semiconductor device includes a dust-proof cover which covers a dust-generating portion in the apparatus such as a mold for effecting resin-molding of the semiconductor device composed of a lead frame and semiconductor chips wire- and die-bonded thereto, and a dust-collecting device for collecting dust which is suspended by the air inside the dust-proof cover.
摘要:
The present invention provides a plastic encapsulated semiconductor device which comprises a connected metal plate having a plurality of semiconductor element holding parts which are connected in series in one direction with at least two connecting arms, said connecting arms having sectional area smaller than that of said semiconductor element holding part and being disposed inside of the side surface of said semiconductor element holding parts in the connecting direction.The invention provides a method of preparing semiconductor devices having relatively large current capacity of about 5 to 50 amperes used as diodes for automobiles and having high quality in the mass production.
摘要:
The present invention aims to provide a pharmaceutical composition containing a stable dihydropyridine compound, where improving the stability of dihydropyridine compounds in pharmaceutical compositions under influence of storage conditions and thus providing a pharmaceutical composition with superior handling ability and affordable administration. As such, the present invention is a pharmaceutical composition, comprising a dihydropyridine compound, and at least one selected from iron oxide and carrageenan; and a method for producing a pharmaceutical composition. In addition, the present invention is a method for stabilizing a dihydropyridine compound in a pharmaceutical composition, comprising mixing the dihydropyridine compound and at least one selected from iron oxide and carrageenan; and also a stabilizing agent, wherein the stabilizing agent is utilized for a pharmaceutical composition containing a dihydropyridine compound, and comprises at least one selected from iron oxide and carrageenan.