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
    5.
    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.