摘要:
A lead frame to be used for a semiconductor device, comprising: a heat sink having a peripheral area and a central projected land on which a semiconductor chip is to be mounted. The heat sink has a relatively good heat radiating characteristic. A plurality of inner leads are provided, each having an inner end superimposed on the peripheral area of the heat sink by an insulating material. A semiconductor chip has a chip surface on which a junction pattern is arranged, and is mounted on the projected land of the heat sink by an insulating adhesive so that the chip surface faces the projected land. TAB leads are provided for electrically connecting the semiconductor chip to the inner leads, and a sealing resin hermetically seals at least the semiconductor chip.
摘要:
In a screen printing that shifts squeegees in a horizontal direction while abutting the squeegees against a mask, and slides the squeegees on the mask, and scrapes up the paste on the mask so that opening portions are filled with the paste to transfer the paste onto the substrate, a larger amount of paste Ps is supplied to regions in which the paste is scraped up by the end portions of the squeegee than a region in which the paste is scraped up by a center portion of the squeegee on the mask.
摘要:
An electronic component mounting system formed by interlinking a plurality of electronic component mounting machines in series for enabling a machine operator to be prevented from mistaking the machine to which an operation section or a signal tower belongs for another. In each of the machines, an operation section placed to one direction side from a center in the board conveying direction of the machine on a machine side face is placed in an attitude in which the normal direction of an operation face is inclined toward the center line. A signal tower placed on one direction side from the center line on the top face of the machine is placed in an attitude in which at least one portion is inclined only at an angle β toward the center line.
摘要:
A low carbon free cutting steel can be obtained by allowing the steel to contain 0.02 to 0.15 mass % of C, 0.05 to 1.8 mass % of Mn, 0.20 to 0.49 mass % of S, more than 0.01 mass % and not more than 0.03 mass % of O, 0.3 to 2.3% of Cr, and the balance consisting of Fe and inevitable impurities, the Cr/S ratio falling within a range of between 2 and 6.
摘要:
A commodity containing apparatus including a charging member 13 attached to a base portion 10 for charging a plurality of sheets of containing bags 40, and a pivoting base portion 22 supported by the base portion 10 pivotably in a vertical face and formed with a commodity throwing opening 27 at a center portion thereof, wherein an end plate 22a of the pivoting base portion 22 opposed to the charging member 13 presses to hold a plurality of sheets of containing bags 40, and the apparatus is small-sized and can simply contain a commodity.
摘要:
An umbrella bag storage device includes a device body 1 in which an umbrella bag 30 is loaded. A tongue member 19, which opens an opening 31 of the umbrella bag 30, and a tip contacting member 17 are attached to a rotating plate 15 in a turnable manner. When a tip of a folding umbrella 40 is brought into contact with the tip contacting member 17, whereby the tip contacting member 17 turns to cause the tongue member 19 to open the opening 31 of the umbrella bag 30. A long hole 17c and a protruding section of a first spindle 14 are engaged such that the tip contacting member 17 and the tongue piece 19 are capable of advancing/retracting. In addition, a torsion spring 21 urges the tip contacting member 17 and the tongue member 19 to the front toward the umbrella bag 30. When a folding umbrella is stored in an umbrella bag, the user's hand, which has been inserted inside of the device, is prevented from being trapped and pinched by the bag opening member.
摘要:
Sliced specimens can be automatically and continuously prepared and burdens of an operator can be reduced while accuracy required for the sliced specimen is maintained. The sliced specimen is prepared by relatively moving a specimen block transfer section and a cutter, and when a slicing operation to adjust the height position of the specimen block is continuously performed so that the cutting surface of the specimen block is located at a sliceable position, the cutter is moved so that a contacting area of a blade edge of the cutter that firstly contacts the specimen block after the height position adjustment is sequentially changed, every time previously set number of times of slicing operation is completed. Thereafter, the height position of the blade edge of the cutter after the change is measured by a detector, and based on the measurement information of the detector, the sliceable position is corrected and the slicing operation is resumed.
摘要:
A mobile radio communication device has an antenna, a circuit board to which the antenna is connected and on which a plurality of electronic elements are mounted, an inner casing formed of resin and housing the circuit board, and an outer casing of resin covering the inner casing. The antenna is located on that portion on an outer face of the inner casing which is covered by the outer casing, and the antenna is disposed to penetrate into the inside of the inner casing through a hole formed on the inner casing, and the feeding end of the antenna is connected to the circuit board. This allows the antenna to be spaced apart from other electronic elements on the circuit board in the lower body without protruding the antenna outside, to achieve a sufficient antenna property by elimination of effects from other electronic elements.
摘要:
A storage device for umbrella sacks comprising a device body for storing a number of storage sacks for umbrellas, a movable support member arranged in the device body so as to move vertically in said device body, a foot pedal for lowering the movable support member, and open control levers for opening the storage sacks in connection with the descending motion of the movable support member.
摘要:
In each node accommodated in a token-ring network system, a storage unit for storing priority levels is constituted by a plurality of flip-flops which provide bit positions of the same number as that of grades of the priority level. When storing a value of priority level which is higher than a value of priority level stored in the storage unit, the corresponding flip-flop of the storage unit is set. Two priority encoders connected to the output of the storage unit detect, from data of priority level stored in the storage unit, first and second priority levels and load then on registers, respectively. In accordance with the contents of the registers, the corresponding flip-flop of the storage unit is rest, when each node detects a value of priority level stored in the storage unit.