5.
    发明专利
    未知

    公开(公告)号:ITMI920344D0

    公开(公告)日:1992-02-18

    申请号:ITMI920344

    申请日:1992-02-18

    Abstract: The breakdown voltage of a VDMOS transistor is markedly increased without depressing other electrical characteristics of the device by tying the potential of a field-isolation diffusion, formed under the edge portion of a strip of field oxide separating a matrix of source cells from a drain diffusion, to the source potential of the transistor. This may be achieved by extending a body region of a peripheral source cell every given number of peripheral cells facing the strip of field-isolation structure until it intersects said field-isolation diffusion. By so connecting one peripheral source cell every given number of cells, the actual decrement of the overall channel width of the integrated transistor is negligible, thus leaving unaltered the electrical characteristics of the power transistor.

    7.
    发明专利
    未知

    公开(公告)号:IT8424126D0

    公开(公告)日:1984-12-18

    申请号:IT2412684

    申请日:1984-12-18

    Abstract: The disclosed bridge circuit is fabricated using power MOS technology. Common terminals of the bridge circuit are integrated into common regions in the implementation. Electrodes, typically coupled together in the bridge circuit, are implemented by a shared conducting region in the integrated circuit of the semiconductor chip. By integrating the elements of the circuit, less area of the semiconductor chip is required as compared to an implementation involving 4 (four) discrete elements. Diodes are fabricated across the transistors to protect the elements against reverse biasing.

    8.
    发明专利
    未知

    公开(公告)号:DE3788438T2

    公开(公告)日:1994-04-07

    申请号:DE3788438

    申请日:1987-01-21

    Abstract: This method, requiring a smaller number of masking steps with respect to the known methods, comprises boron implant (25) on the surface of an epitaxial layer (2), without masking, and arsenic implant (28) in predetermined locations of the epitaxial layer surface by means of an appropriate mask (27). A subsequent thermal treatment then leads to diffusion of the implanted arsenic and boron atoms (72,35-37), but boron diffusion in the regions in which arsenic implant has also occurred is prevented by the interaction with the latter, to thereby obtain regions with an N⁺ type conductivity where both boron and arsenic have been implanted and regions of P type conductivity where only boron has been implanted

    9.
    发明专利
    未知

    公开(公告)号:DE3788438D1

    公开(公告)日:1994-01-27

    申请号:DE3788438

    申请日:1987-01-21

    Abstract: This method, requiring a smaller number of masking steps with respect to the known methods, comprises boron implant (25) on the surface of an epitaxial layer (2), without masking, and arsenic implant (28) in predetermined locations of the epitaxial layer surface by means of an appropriate mask (27). A subsequent thermal treatment then leads to diffusion of the implanted arsenic and boron atoms (72,35-37), but boron diffusion in the regions in which arsenic implant has also occurred is prevented by the interaction with the latter, to thereby obtain regions with an N⁺ type conductivity where both boron and arsenic have been implanted and regions of P type conductivity where only boron has been implanted

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