24.
    发明专利
    未知

    公开(公告)号:DE68925116T2

    公开(公告)日:1996-05-09

    申请号:DE68925116

    申请日:1989-06-28

    Abstract: A high density, mixed technology integrated circuit comprises CMOS structures and bipolar lateral transistors, the electrical efficiency and Early voltage of which are maintained high by forming "well" regions through the collector area. The operation determines the formation of a "collector extension region" extending relatively deep within the epitaxial layer so as to intercept the emitter current and gather it to the collector, subtracting it from dispersion toward the substrate through the adjacent isolation junctions surrounding the region of the lateral bipolar transistor. Under comparable conditions, the ratio between Ic/Isubstrate is incremented from about 8 to about 300 and the Early voltage from about 20 V to about 100 V. The VCEO, BVCBO and BVCES voltages are also advantageously increased by the presence of said "well" region formed in the collector zone.

    26.
    发明专利
    未知

    公开(公告)号:DE68925116D1

    公开(公告)日:1996-01-25

    申请号:DE68925116

    申请日:1989-06-28

    Abstract: A high density, mixed technology integrated circuit comprises CMOS structures and bipolar lateral transistors, the electrical efficiency and Early voltage of which are maintained high by forming "well" regions through the collector area. The operation determines the formation of a "collector extension region" extending relatively deep within the epitaxial layer so as to intercept the emitter current and gather it to the collector, subtracting it from dispersion toward the substrate through the adjacent isolation junctions surrounding the region of the lateral bipolar transistor. Under comparable conditions, the ratio between Ic/Isubstrate is incremented from about 8 to about 300 and the Early voltage from about 20 V to about 100 V. The VCEO, BVCBO and BVCES voltages are also advantageously increased by the presence of said "well" region formed in the collector zone.

    29.
    发明专利
    未知

    公开(公告)号:DE3778961D1

    公开(公告)日:1992-06-17

    申请号:DE3778961

    申请日:1987-02-23

    Abstract: Described is an improved fabrication process for vertical DMOS cells contemplating the prior definition of the gate areas by placing a polycrystalline silicon gate electrode and utilizing the gate electrode itself as a mask for implanting and diffusing the body regions, while forming the short region is carried out using self-alignment techniques which permit an easy control of the lateral extention of the region itself. A noncritical mask defines the zone where the short circuiting contact between the source electrode and the source and body regions in the middle of the DMOS cell will be made, allowing also to form the source region. Opening of the relative contact is also effected by self alignment technique, further simplifying the process.

    30.
    发明专利
    未知

    公开(公告)号:IT1227104B

    公开(公告)日:1991-03-15

    申请号:IT2208588

    申请日:1988-09-27

    Abstract: An integrated circuit (1) self-protected agianst reversal of the supply battery (2) polarity comprises a first DMOS power transistor (T1) connected with its source electrode (S1) side to an electric load (R1) to be driven toward ground, and a second, protective DMOS transistor (T2) which is connected with its source electrode (S2) side to a positive pole (Vc) of the battery (2) and with its drain electrode (D2) side to the drain electrode (D1) of the first transistor (T1). The first T1) and second (T2) transistors have in common the drain region formed on a single pod (9) in the semiconductor substrate (4).

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