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    • 6. 发明专利
    • SEMICONDUCTOR SURGE PROTECTIVE ELEMENT
    • JPH01286370A
    • 1989-11-17
    • JP11352688
    • 1988-05-12
    • AGENCY IND SCIENCE TECHNSANKOSHA CO LTDOUME KOSUMOSU DENKI KK
    • HAYASHI YUTAKASATO MASAAKIYOSHIHARA HIROAKI
    • H01L29/66H01L29/861
    • PURPOSE:To seek to improve electric characteristics and advance high integration by providing an auxiliary area capable of controlling implanted carriers. CONSTITUTION:Though discharged currents into an element flow out by the route leading a first semiconductor area 1 through a fourth area 4 and an auxiliary area 5, and following it, a phenomenon that a small number of carriers implanted from the fourth area 4 toward the first semiconductor area 1 recombines with a large number of carriers begins to occur in the auxiliary area 5. Further, as the passing current amounts increase, the speed of this recombination ceases to catch up with the supply speed of the small number of carriers or a condition that the defective density of the auxiliary area 5 is filled out with a small number of carriers occurs, and a small number of carriers begin to pass by the auxiliary area 5 as they are. As a result that a small number of carriers flowed into a second semiconductor area 2 electrically connected with a third area 3, voltage drop arises in the second semiconductor area 2, and implantation of carriers occurs from the third area 3 to the second semiconductor area 2. Hereby, clamp voltage becomes extremely low voltage, and high integration becomes easy.
    • 8. 发明专利
    • SURGE ABSORBING ELEMENT
    • JPS62154776A
    • 1987-07-09
    • JP29296985
    • 1985-12-27
    • AGENCY IND SCIENCE TECHNSANKOSHA CO LTDMITAKA DENSHI KAGAKU KENKYUSHO
    • HAYASHI YUTAKASATO MASAAKIMURAMATSU YUJIYOSHIHARA HIROAKIHASEGAWA TEIJI
    • H01L27/04H01L21/822H01L27/02H01L27/06H01L29/74H01L29/861
    • PURPOSE:To obtain an element, by which an arbitrary breakdown voltage is obtained with good design property and a large current can be absorbed with a dynamic current phenomenon being suppressed, by absorbing a surge current by punch through between specified semiconductor regions, and controlling a holding current in a recombination region. CONSTITUTION:On the main surface side of a first semiconductor region (first conductivity type) 1, a second semiconductor region (reverse conductivity type), which forms a p-n junction diode, is provided. A third region 3 is contacted with the region 2 at its side opposite to the side of the region 1. Thus the region 3 specifies the effective thickness of the region 2. A fourth semiconductor region (reverse conductivity type) 4 is separated from the region 2 in the lateral direction and forms an implanted junction together with the region 1. A carrier recombination region 1R is provided at either or both of the following parts: a part between the regions 2 and 4 on said one surface side of the region 1; and at least parts beneath the region 2 and the region 4 at the back surface of the region 1. A surge current is generated by punch through between the region 1 and the region 3 when a depletion layer yielded by a reverse bias to said p-n junction diode reaches the region 3. With the surge current being absorbed, a holding current is controlled with the recombination region 1R.
    • 9. 发明专利
    • METHOD FOR AUTOMATICALLY CONTROLLING AND WEIGHING DROPPING OBJECT
    • JPS61164120A
    • 1986-07-24
    • JP484985
    • 1985-01-17
    • YONEKEN KKSANKOSHA CO LTD
    • HAYASHI YUTAKAHASHIMOTO SHUICHI
    • G01G13/12
    • PURPOSE:To automatically control the flow rate of a dropping object, by providing a current meter in the dropping course and measuring the dropping speed of the dropping object, and then, adjusting the feeding quantity of a feeding device and the timing of the supply cut of a timing control device. CONSTITUTION:A current meter 11 is provided on the midway of the dropping course 10 of a dropping object 2 and connected with a feeding device 20 and timing control device 13 through a calculation controller 12. Then the dropping speed of the dropping object 2 to be measured by means of the current meter 11 as a measuring point is set in the calculation controller 12. When the dropping object 2 is dropped onto the dropping course 10 through the opening 1a of a hopper 1, the current meter 11 measures the dropping speed of the dropping object 2 and the controller 12 compares the measured value with a set value and calculates a correction value, and then, adjusts the feeding quantity of the feeding device 20. In addition, the controller 12 calculates the correction value of the timing controller 13 from the dropping speed and the difference in height and time between the current meter 11 and a mass calculator 3 and adjusts the timing of supply cut.