FORMATION OF DIELECTRIC SEPARATION STRUCTURE

    公开(公告)号:JPH08279554A

    公开(公告)日:1996-10-22

    申请号:JP7690896

    申请日:1996-03-29

    Abstract: PROBLEM TO BE SOLVED: To provide a method for forming a structure which isolates two regions of an integrated circuit. SOLUTION: In a method for forming a dialectic isolation structure between two regions of an integrated circuit where active regions of electronic components are already defined on a semiconductor substrate, the method includes a step for defining an isolation region 45 on a silicon oxide layer 42 which covers a silicon layer 41, a step for forming the isolation layer 45 by selectively etching the silicon layer 41, a step for growing a thermal oxide 43 on the inner surface of the isolation layer 45, a step for stacking a dialectic layer such that it aligns, and a step for oxidizing the stacked dialectic layer.

    VOLTAGE DOUBLER,VOLTAGE BOOSTER,AND VOLTAGE ADJUSTER

    公开(公告)号:JPH08275506A

    公开(公告)日:1996-10-18

    申请号:JP20714595

    申请日:1995-08-14

    Abstract: PROBLEM TO BE SOLVED: To obtain two ways of use for enabling finding out the advantageous use of a charge pump MOS voltage booster and boosters of this type. SOLUTION: A voltage booster is equipped with four MOS transistors (M1, M2, M3, M4) in place of a classical diode showing an undesirable voltage drop and with an oscillator having two output terminals and two corresponding charge transfer capacitors, in place of a classical oscillator of a single output having relevant charge transfer capacitors. In this method, the undesirable voltage drop substantially does not exist, and ripples are reduced without making a circuit complicated.

    HIGH-FREQUENCY BIPOLAR TRANSISTOR BODY STRUCTURE AND ITS PREPARATION

    公开(公告)号:JPH08274109A

    公开(公告)日:1996-10-18

    申请号:JP27773995

    申请日:1995-10-25

    Abstract: PROBLEM TO BE SOLVED: To improve the speed performance of a high-frequency bipolar- transistor structure. SOLUTION: The structure of a high-frequency bipolar transistor has an intrinsic base region 6 surrounded by an extrinsic base region 5 and has a first conductivity type base region 4 formed in a second conductivity type silicon layer 3 and a second conductivity type emitter region 7 formed at the inner side of the intrinsic base region 6. A first polysilicon layer 9 and a second polysilicon layer 15 are brought into contact with the extrinsic base region 5 and the emitter region 7, respectively. The first and second polysilicon layers 9 and 15 are brought into contact with a base metal electrode 13 and an emitter metal electrode 16, respectively. A silicide layer 8 is provided between the extrinsic base region 5 and the first polysilicon layer 9, and the extrinsic base resistance of the bipolar transistor is decreased.

    MOS-TECHNOLOGY POWER-DEVICE CHIP AND PACKAGE ASSEMBLY

    公开(公告)号:JPH08213614A

    公开(公告)日:1996-08-20

    申请号:JP19759695

    申请日:1995-08-02

    Abstract: PROBLEM TO BE SOLVED: To reduce a parasitic resistance value and inductance of wire and pin by separating units comprising a plurality of function units with such a region of a semiconductor layer as no function unit is formed. SOLUTION: A semiconductor material layer 5 is selectively coated with an insulated gate layer 11 extending on a first doped region 7, and the gate layer 11 is made to contact gate metal meshes 101 and 102 connected to at least one gate metal pad, while surrounding a source metal plate 100. By connecting the gate metal pad to each pin P8 of a package with each bonding wire W8, all MOSFET units among all the MOSEFT units are connected in parallel. Thus, the maximum current capacity of the power device can be re- established, while each source electrode pin can be electrically speared according to individual purposes, resulting in significantly improved freedom in design.

    FUZZY LOGIC DEVICE FOR REDUCTION OF IMAGE NOISE

    公开(公告)号:JPH08190628A

    公开(公告)日:1996-07-23

    申请号:JP20877595

    申请日:1995-08-16

    Abstract: PROBLEM TO BE SOLVED: To perform an excellent noise reduction operation while preserving useful high-pass (high band) information. SOLUTION: This device is provided with an interface 1 for obtaining the gray levels of the pixel to be processed of images and the adjacent pixel, a difference circuit 2 for generating the difference of the gray levels of the pixel to be processed and the adjacent pixel, a fuzzy flat area smoothing circuit 8 for performing the low-pass (low band) smoothing of an almost uniform area stipulated by the pixel and the adjacent pixel, an edge preservation smoothing circuit 9 for performing a low-pass filtering processing to a high frequency information area stipulated by the pixel and the adjacent pixel, an area voter circuit 4 for supplying a measurement value for examining whether or not the area stipulated by the pixel and the adjacent pixel is almost uniform and a soft switching circuit 10 for weighting the output of the smoothing circuits 8 and 9 based on the measurement value.

    FILTER STRUCTURE AND WAVE-FILTRATION METHOD

    公开(公告)号:JPH08102873A

    公开(公告)日:1996-04-16

    申请号:JP10261495

    申请日:1995-04-26

    Abstract: PURPOSE: To reduce noise of a television signal and also perform simultaneous scan conversion by including a noise reducing circuit and a simultaneous scan conversion circuit of a TV signal. CONSTITUTION: A filter archtecture is provided with at least one filter 3 which has plural digital inputs Pi and X that receive television signal elements through an interface and also has a few outputs NR and includes at least one interpolating block which takes a result of a filtering operation for noise that is associated with a television signal by the outputs NR, is connected to an input in the filter 3, also operates in fuzzy theory and executes scan conversion of a television signal that should be presented to other outputs SRC of the filter 3.

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