41.
    发明专利
    未知

    公开(公告)号:FR2845522A1

    公开(公告)日:2004-04-09

    申请号:FR0212278

    申请日:2002-10-03

    Abstract: An integrated circuit incorporates a buried layer of the type with conductivity determined in a plane essentially parallel to a plane of a main surface of the circuit. The median part of this buried layer (23, 24) is filled with a metallic type material (29). An Independent claim is also included for a method for the formation of a layer buried in a semiconductor substrate of an integrated circuit.

    Method for the production of a bipolar transistor with auto-aligned emitter and extrinsic base, in particular a hetero-junction bipolar transistor

    公开(公告)号:FR2804247A1

    公开(公告)日:2001-07-27

    申请号:FR0000791

    申请日:2000-01-21

    Inventor: MARTY MICHEL

    Abstract: A method for the production of a bipolar transistor with an auto-aligned emitter and extrinsic base comprises:- a) the formation on a layer (15) for the formation of the base of the transistor of a pile of a layers of SiGe alloy (16), silicon oxide (17) and silicon nitride (18); b) forming in this layer a false emitter (20); c) forming in the layer (15) for the formation of the base a region of extrinsic base (22) and siliconising this region of extrinsic base; d) covering the region of extrinsic base (22) and the false emitter (20) with a layer of silicon dioxide (24) that is mechanic-chemically polished up to the level of the false emitter (20); e) engraving the false emitter (20) to form a window (25); and f) forming in the window (25) and on the layer of silicon dioxide (24) an emitter of polysilicon (27).

    46.
    发明专利
    未知

    公开(公告)号:FR2799048A1

    公开(公告)日:2001-03-30

    申请号:FR9911895

    申请日:1999-09-23

    Abstract: Bipolar transistor fabrication includes a step of producing a base region (8) comprising an extrinsic base (800) and an intrinsic base, and a step of producing an emitter block having a narrower lower part located in an emitter-window above the intrinsic base. Production of the extrinsic base (800) involves dopant implantation after defining the emitter-window, on both sides at a determined distance from the lateral limits of the emitter-window, with self-alignment about the emitter-window, and before emitter block formation. An oxide block (13) is formed on an insulating layer located above the intrinsic base. The oxide block (13) has a narrower lower part (130) located in an etched hole of the insulating layer and whose dimensions correspond to those of the emitter-window, and an upper wider part (131) resting on the insulating layer. The lateral sides of the etched hole of the insulating layer are self-aligned with the lateral sides (FV) of the upper part of the oxide block. Ion implantation of the extrinsic base is formed on both sides of the upper part of the oxide block (13).

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