摘要:
A DC/DC converter has a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching transistor connected in series to the primary winding, a control transistor for turning the switching transistor on or off, and a feedback control circuit connected to the control transistor and the auxiliary winding. The feedback control circuit includes a Zener diode having a substantially zero temperature coefficient. The Zener diode has a Zener voltage which lies in a range between 5 volts and 6 volts. In order to cancel a temperature characteristic of the control transistor, the temperature coefficient of the Zener diode is selected.
摘要:
A tight contact layer is disposed on a semiconductor substrate, the tight contact layer being made of one material selected from the group consisting of refractory metal, alloy of refractory metal, nitride of refractory metal, and siliconized nitride of refractory metal. An oxide surface layer is disposed on the surface of the tight contact layer, the oxide surface layer being made of oxide of material constituting the tight contact layer. A first conductive layer is disposed on the surface of the oxide surface layer, the first conductive layer being made of a platinum group or alloy which contains a platinum group. When a conductive layer made of metal such as a platinum group is formed on a tight contact layer, coverage and morphology can be prevented from being degraded.
摘要:
A stopper change device (10) includes an airtight chamber body (21) detachably mountable on a head of a bottle, a gas supply port (19) for supplying N gas to the chamber body, an air vent valve (57) for discharging air from the chamber body, a first supporting structure (28) movable upward and downward for supporting a corkscrew, and a second supporting structure (34) movable upward and downward for containing a substitute stopper. The first and second supporting structures are mutually position changeable, and one of them is selectively placed above an opening of the bottle. When the first supporting structure (28) is placed above the opening, a bottle stopper can be pulled in N gas atmosphere. On the other hand, when the second supporting structure (34) is placed above the opening, the substitute stopper is mountable on the head of the bottle in N gas atmosphere. By changing the bottle stopper with the substitute stopper using this device, entering of air in the bottle as a cause of deterioration in a quality can be prevented.
摘要:
It is constructed such that a closed space (12b) of an inner container (12) having a heat retaining property which constitutes a liquid container (1B) is able to be closed airtightly by closing of a lid structure (141). Contact between stored liquid and the atmosphere is shut off by making the inside of the closed space be in an inert gas atmosphere. It is constructed such that the stored liquid is able to be discharged by pressure of supplied inert gas at a time of opening of a discharge valve (168) communicating with the inner container. Oxidation deterioration of liquid is effectively prevented by shut-off from the atmosphere. When the stored liquid is discharged in small portions, preventive effect is maintained by continual supply of inert gas.
摘要:
The present invention relates to a method of manufacturing a semiconductor substrate including the back grind step, the dicing step, the pick up step, and the die bonding step of the wafer; and to a semiconductor substrate jig used in such method. The object of the present invention is to mitigate the effect and to prevent damage caused by the lack of strength in thinned semiconductor substrates. A jig with an outer frame 21, and a rubber film 22 arranged within the outer frame 21 and having increasing and decreasing body size while deforming its shape by supplying air therein are provided. As the volume of the rubber film 22 increases, the wafer-fixing jig 20 deforms the rubber film and allows the tapes 2 and 6 arranged between the wafer 1 and the rubber film 22A to be pushed toward the wafer 1 gradually from the center outward. The attachment step, the back grind step, the tape reapplication step, the pick up step and the die bonding step are conducted using such wafer-fixing jig.
摘要:
A DC/DC converter has a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching transistor connected in series to the primary winding, a control transistor for turning the switching transistor on or off, and a feedback control circuit connected to the control transistor and the auxiliary winding. The feedback control circuit includes a Zener diode having a substantially zero temperature coefficient. The Zener diode has a Zener voltage which lies in a range between 5 volts and 6 volts. In order to cancel a temperature characteristic of the control transistor, the temperature coefficient of the Zener diode is selected.
摘要:
A stopper change device (10) includes an airtight chamber body (21) detachably mountable on a head of a bottle, a gas supply port (19) for supplying N gas to the chamber body, an air vent valve (57) for discharging air from the chamber body, a first supporting structure (28) movable upward and downward for supporting a corkscrew, and a second supporting structure (34) movable upward and downward for containing a substitute stopper. The first and second supporting structures are mutually position changeable, and one of them is selectively placed above an opening of the bottle. When the first supporting structure (28) is placed above the opening, a bottle stopper can be pulled in N gas atmosphere. On the other hand, when the second supporting structure (34) is placed above the opening, the substitute stopper is mountable on the head of the bottle in N gas atmosphere. By changing the bottle stopper with the substitute stopper using this device, entering of air in the bottle as a cause of deterioration in a quality can be prevented.
摘要:
A reading head pauses at a predetermined position on a selected one of a plurality of series information recorded, for example, on a CD (compact disc). Either a preceding distance between a current position of the reading head on the series of information and a starting position on the series of information, at which starting position the series of information starts, or a remaining distance between the current position on the series of information and an ending position on the series of information, at which ending position the series of information ends, is indicated. The above indication is switched automatically in response to the pausing of the reading head so that the indication of a first one of the preceding distance and the remaining distance is changed to the indication of a second one thereof. Then after elapsing of a predetermined time period, the indication is automatically switched from the indication of the second one of the predetermined distance and the remaining distance to the indication of the first one thereof.
摘要:
A process for refining a crude material for copper or copper alloy which contains as impurity elements at least one species of Pb, Ni, Sb, S, Bi, and As in combination with at least one species of Sn, Fe, and Zn, which comprises the sequential steps of (1) melting a crude material for copper or copper alloy, (2a) increasing the oxygen concentration in the melt, thereby oxidizing Sn, Fe, and Zn into slag, (this step is carried out if the crude material contains as impurity elements at least one species of Sn, Fe, and Zn) (2b) adding to the melt at least one species selected from the group consisting of Fe, Fe oxide, Mn, and Mn oxide, thereby causing Pb, Ni, Sb, S, Bi, and As in the melt to slag in the form of compound oxide of Fe and/or Mn, (3) removing the thus formed slag from the melt, and (4) subjecting the melt to reduction.
摘要:
The electronic cash register stores monetary transaction information for each guest in the first memory by entering it with the input means, and when a totalization operation is specified by the first specifying means, the electronic cash register sums up the amount of money stored in the first memory and adds a result of the calculation to the data in the second memory. When entering monetary transaction information for a guest is temporarily ended and there is possibility of reentering the transaction information, the cash register keeps the transaction process in the temporary totalization state, namely, keeps the data stored in the first memory without clearing it as summing up the amount of money stored in the first memory and adding its calculation result to the data in the second memory, and then, when an additional registration is specified by the third specifying means, the cash register subtracts the calculation result in the first memory from the value stored in the second memory, and stores the additionally registered transaction information from the input means in the first memory as an additional registration. Accordingly, when registration of its additional order is performed in a restaurant after registration of a new order was performed, the cash register can print both monetary transaction information of a new order and its additional order together on a single slip on the basis of the data stored in the first memory.