摘要:
With a view to preventing increases in forward voltage due to a change with the lapse of time of a bipolar semiconductor device using a silicon carbide semiconductor, a buffer layer, a drift layer and other p-type and n-type semiconductor layers are formed on a growth surface, which is given by a surface of a crystal of a silicon carbide semiconductor having an off-angle θ of 8 degrees from a (000-1) carbon surface of the crystal, at a film growth rate having a film-thickness increasing rate per hour h of 10 μm/h, which is three times or more higher than conventional counterparts. The flow rate of silane and propane material gases and dopant gases is largely increased to enhance the film growth rate.
摘要:
With a view to preventing increases in forward voltage due to a change with the lapse of time of a bipolar semiconductor device using a silicon carbide semiconductor, a buffer layer, a drift layer and other p-type and n-type semiconductor layers are formed on a growth surface, which is given by a surface of a crystal of a silicon carbide semiconductor having an off-angle θ of 8 degrees from a (000-1) carbon surface of the crystal, at a film growth rate having a film-thickness increasing rate per hour h of 10 μm/h, which is three times or more higher than conventional counterparts. The flow rate of silane and propane material gases and dopant gases is largely increased to enhance the film growth rate.
摘要:
An ink jet head is presented that decreases the density in wiring patterns to be connected to a large number of actuator terminals formed on a main body of the ink jet head while ensuring large spacing between the wirings. The ink jet head comprises a main body, a driver IC, and a sheet. The main body comprises a plurality of nozzles, a plurality of pressure chambers, a plurality of actuators, and a plurality of actuator terminals distributed on a surface of the main body. The driver IC can select any actuator terminal among the plurality of actuator terminals and transmit a driving voltage to the selected actuator terminal. The sheet mounts the driver IC at a first surface of the sheet and is fixed to the main body at a second surface. The sheet comprises a plurality of input terminals, a plurality of output terminals distributed on the second surface, a plurality of first wirings connecting the input terminals and the driver IC, and a plurality of second wirings connecting the driver IC and the output terminals. Output terminals of the sheet are connected to the actuator terminals of the main body. The second wiring penetrates the sheet.
摘要:
An ink jet printer is provided with an ink jet head that executes a printing action in which ink is discharged toward a print medium, a transportation device that transports the print medium, and a controller that controls the ink jet head to execute the printing action. The controller controls the ink jet head to execute the printing action when the ink jet printer has finished receiving a predetermined amount of print data. In a case where a time since a last printing action has exceeded a predetermined time, the controller prevents the ink jet head from executing the printing action against a partially printed print medium, and controls the transportation device to eject the print medium.
摘要:
A stencil printing machine 1 is provided with a stencil drum 16 and a opposite 17 which are a pair of cylindrical parts located with their external peripheral surfaces being close to each other, a stencil sheet 15 being detachably wound on the external peripheral surface of the stencil drum 16, and serves to perform stencil printing process by rotating the stencil drum 16 and the opposite 17 in order that the external peripheral surfaces thereof are located close to each other and moved in the same direction while the stencil sheet 15 is pressed against the opposite 17, and by making the stencil sheet 15 in contact under pressure with a sheet of paper 22 passing between the stencil drum 16 and the opposite 17 by the pressing force of the stencil drum 16. The stencil drum 16 is detachably mounted on the stencil printing machine and provided with storage units 201 to 203 for storing information about the pressing force of the stencil drum 16 against the opposite 17.
摘要:
A rubber pad comprises a support plate having substantially the same shape as an outer surface of an iron shoe plate provided on its outer surface with lugs, a rubber block vulcanized and adhered to the support plate, wherein the support plate is provided with a bolt or a female member fixed to at least one side face of the support plate, a hook member fixed to the support plate at a position opposite to the bolt or female member. Further, the rubber pad is provided with a fastening member securing the rubber pad to the iron shoe plate through another female member or bolt.
摘要:
In a stencil printer, in order to definitely prevent an ink leakage even when the perforated portion 20c of the printing drum laps over the clamp 25 of the back press roller 14, the portions of a part of the outer circumferential surface of the back press roller positioned adjacent to the rear and opposite side edges of the clamp 25 is provided by a movable circumferential member 66 adapted to bias rearward relative to the clamp in synchronization with the opening operation of the clamp, so as thereby to cancel the clearance formed along the periphery of the clamp without obstructing the opening operation of the clamp.
摘要:
The present invention provides a long-acting insecticidal mat which is applied to the electric mosquito-repellent mat system and is capable of maintaining the insecticidal effect for a long period, not less than five days, and a heat-transpiration insecticidal method using the mat, wherein a fibrous mat which is impregnated with not less than 50 mg per mat of an insecticidal ingredient of pyrethroid having not less than 4.0.times.10.sup.-6 mmHg of vapor pressure at 20.degree. C. is used by means of setting the mat on a radiation plate which has an area of 0.2 to 0.6 time as large as the base area of the mat and has a heating temperature of 70 to 170.degree. C.
摘要:
In a stencil printer having a printing drum 10 which has a circumferential wall portion for mounting a stencil sheet made of a flexible sheet member 20 and including a perforated portion 20c, an inking roller 12 provided inside of the printing drum for supplying ink to the printing drum from its inside, and a back press roller 14 for supporting a print sheet against the printing drum by holding a leading end of the print sheet by clamps 25, a strip of elastic sheet 52 is provided to prevent ink leakage from the perforated portion 20c of the printing drum due to insufficient support of the print sheet by the back press roller at the portion of the clamps 25.
摘要:
A compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each a lower alkyl group or they may together represent a lower alkylene group so as to form a nitrogen-containing cyclic group with the nitrogen atom to which they attach, R.sub.3 is a cycloalkyl(lower)alkyl group, an oxacycloalkyl(lower)alkyl group or a dioxacycloalkyl(lower)alkyl group and n is an integer of 0 to 2, which is useful as a herbicide.