PROCÉDÉ POUR ÉLIMINER DES IMPURETÉS EXTRINSÈQUES RÉSIDUELLES DANS UN SUBSTRAT EN ZnO OU EN ZnMgO DE TYPE N, ET POUR RÉALISER UN DOPAGE DE TYPE P DE CE SUBSTRAT
    3.
    发明公开
    PROCÉDÉ POUR ÉLIMINER DES IMPURETÉS EXTRINSÈQUES RÉSIDUELLES DANS UN SUBSTRAT EN ZnO OU EN ZnMgO DE TYPE N, ET POUR RÉALISER UN DOPAGE DE TYPE P DE CE SUBSTRAT 审中-公开
    FOR除去杂质外在REST IN A的ZnO或ZnMgO基材类型N个与用于掺杂P型的实现方法,所述衬底

    公开(公告)号:EP2577719A1

    公开(公告)日:2013-04-10

    申请号:EP11722473.3

    申请日:2011-06-01

    IPC分类号: H01L21/425 H01L21/477

    摘要: The invention relates to a method for purifying an n-type substrate made of ZnO and/or ZnMgO for reducing or removing the residual extrinsic impurities of the substrate with a view to p type doping at least a portion of the substrate, wherein a reactive species having a strong chemical affinity with at least one of the residual extrinsic impurities and/or capable of creating crystalline defects is introduced into at least one area of the substrate, said reactive species consisting of P, thus creating at least one so-called "getter" zone in the substrate, said zone being capable of trapping said residual extrinsic impurities and/or in which zone the residual extrinsic impurities are trapped; the substrate then annealed to diffuse the residual extrinsic impurities toward the "getter" zone, and/or out of the "getter" zone, preferably toward at least one surface of the substrate. The invention further relates to a method for preparing a substrate made of p-doped ZnO and/or ZnMgO including at least one step of purifying an n-type substrate made of ZnO and/or ZnMgO by the above purification method, wherein one or more reactive specie(s) not limited to phosphorus alone is/are employed.

    METHOD OF FORMING SELF-ALIGNED THIN FILM TRANSISTOR
    4.
    发明公开
    METHOD OF FORMING SELF-ALIGNED THIN FILM TRANSISTOR 失效
    过程中自动调心薄膜晶体管

    公开(公告)号:EP0842530A1

    公开(公告)日:1998-05-20

    申请号:EP95926351.0

    申请日:1995-07-31

    IPC分类号: H01L21 H01L29

    摘要: During the formation of a self-aligned thin film transistor (50), the semiconductor material channel layer (58) on the gate insulating layer (56) has a passivation shield (PS) applied to it aligned with the gate electrode (54). The channel layer is then exposed to a reagent selected to yield a chemical reaction with the portions of the channel layer (58) not covered by the passivation shield (PS) causing removal of a component of the semiconductor material thereby to change the electical properties of those portions of the channel layer. In this manner, doped source and drain regions (60, 62) can be formed on opposite sides of the channel having edges that extend to the edges of the gate electrode avoiding any overlap therebetween and reducing the parasitic capacitance of the thin film transistor (50).