SEMICONDUCTOR DEVICE AND ITS PRODUCTION METHOD
    2.
    发明公开
    SEMICONDUCTOR DEVICE AND ITS PRODUCTION METHOD 审中-公开
    半导体部件及其生产

    公开(公告)号:EP1335425A4

    公开(公告)日:2008-10-08

    申请号:EP01976761

    申请日:2001-10-19

    申请人: SHARP KK

    摘要: A semiconductor device having a two-layer well structure and a small margin required at the boundary of a well region and comprising a variable substrate-bias transistor and a DTMOS. Field-effect transistors (223) are fabricated on a P-type shallow well region (212). The depth of a shallow element-isolating region (214) over the P-type shallow well region (212) is less than the depth of the junction between an N-type deep well region (227) and the P-type shallow well region (212). Therefore the field-effect transistors (223) share the P-type shallow well region (212). The P-type shallow well regions (212) independently of each other are easily formed since they are isolated from each other by a deep element-isolating region (226) and the N-type deep well region (227).

    SEMICONDUCTOR DEVICE AND PORTABLE ELECTRONIC APPARATUS
    5.
    发明公开
    SEMICONDUCTOR DEVICE AND PORTABLE ELECTRONIC APPARATUS 有权
    半导体部件和便携式电子设备

    公开(公告)号:EP1343207A4

    公开(公告)日:2008-01-23

    申请号:EP01982765

    申请日:2001-11-13

    申请人: SHARP KK

    摘要: A semiconductor device of low power consumption and high reliability with a DTMOS and a substrate bias variable transistor and a portable electronic apparatus comprising this semiconductor device. This device has three layer well regions (12, 14, 16; 13, 15, 16) on a semiconductor substrate (11) and is provided with DTMOSs (29, 30), and substrate bias variable transistors (27, 28) in shallow well regions (16, 17). A boundary which constitutes a PNP, an NPN, or an NPNP structure is provided with wide element isolating regions (181, 182, 183), but a narrow element isolating region (18) when both the well regions have the same conductivity type. Thus, a plurality of well regions of respective conductivity types provided with substrate bias variable transistors (27, 28) of the respective conductivity types are made electrically independent to reduce power consumption and to suppress latchup phenomenon.