METHODS OF TREATING A SEMICONDUCTOR LAYER

    公开(公告)号:SG2013062914A

    公开(公告)日:2014-03-28

    申请号:SG2013062914

    申请日:2013-08-19

    Applicant: GEN ELECTRIC

    Abstract: Methods for treating a semiconductor layer including a semiconductor material are presented. A method includes contacting at least a portion of the semiconductor material with a passivating agent. The method further includes forming a first region in the semiconductor layer by introducing a dopant into the semiconductor material; and forming a chalcogen-rich region. The method further includes forming a second region in the semiconductor layer, the second region including a dopant, wherein an average atomic concentration of the dopant in the second region is greater than an average atomic concentration of the dopant in the first region. Photovoltaic devices are also presented.

    Method for reducing metal ion concentration in brine solution

    公开(公告)号:AU6370900A

    公开(公告)日:2001-03-19

    申请号:AU6370900

    申请日:2000-07-25

    Applicant: GEN ELECTRIC

    Abstract: This invention relates to a method for removing impurities from a brine solution, the brine solution comprising a water soluble chelating agent, the method comprising the steps of:a) adjusting the pH of the brine solution to a pH of from about 2 to about 4;b) passing the brine solution through a first functionalized resin; the first functionalized resin having functional groups capable of removing multivalent metal cations from the brine solution;c) adjusting the pH of the brine solution to a pH of from about 9 to about 11.5; andd) passing the brine solution through a second functionalized resin; the second functionalized resin having functional groups capable of removing alkaline earth metal cations from the brine solution.

    36.
    发明专利
    未知

    公开(公告)号:DE69009973T2

    公开(公告)日:1995-02-02

    申请号:DE69009973

    申请日:1990-12-24

    Applicant: GEN ELECTRIC

    Abstract: A polyimide surface is pretreated in preparation for an adhesion promotion treatment and subsequent metallization on the surface, wherein the pretreatment comprises the steps of: (A) contacting the polyimide surface with an aqueous solution of nitric acid having a concentration of about 35 to about 70% by weight or an aqueous solution of hydrochloric acid having a concentration of about 10 to about 38% by weight; (B) rinsing the acid-treated polyimide surface with water so as to substantially remove the acid from the surface of the polyimide; (C) contacting the rinsed polyimide surface with a mild etching agent, resulting in the formation of a residual film on the polyimide surface; (D) contacting the etched polyimide surface with a basic solution, and (E) removing the residual film formed on the surface of the polyimide after contact with the mild etching agent in step (C). The method of this invention allows both filled and unfilled polyimide substrates to be electroless plated in a consistent manner and provides improved adhesion between the polymer and subsequently deposited metals.

    37.
    发明专利
    未知

    公开(公告)号:DE68908488T2

    公开(公告)日:1994-04-14

    申请号:DE68908488

    申请日:1989-05-23

    Applicant: GEN ELECTRIC

    Abstract: An improved method for pretreating a polyimide surface in preparation for an adhesion promotion treatment and subsequent metallization is disclosed, wherein the pretreatment comprises mild etching of the surface, contact of the surface with a basic solution, and contact of the surface with a cationic surfactant which is capable of removing a residual film formed on the surface after the mild etching step. This invention further includes articles such as printed circuit boards, which comprise a polyimide substrate pretreated as described above and then treated with an adhesion promoter, wherein an electrolessly-applied metal layer is disposed on the substrate, and an electrolytically-applied metal layer free of chemical additives is disposed on the electrolessly-applied layer. The article may include an additional electrolytically-applied layer containing chemical additives and disposed on top of the first electrolytic layer.

    38.
    发明专利
    未知

    公开(公告)号:DE69003981D1

    公开(公告)日:1993-11-25

    申请号:DE69003981

    申请日:1990-03-26

    Applicant: GEN ELECTRIC

    Abstract: The method is provided for treating the surface of a polyetherimide substrate to improve its adhesion characteristics for electrolessly deposited metal, such as copper. There is employed a series of surface treatments including the initial immersion of the polyetherimide substrate in sulfuric acid, contact with aqueous base, such as potassium hydroxide, followed by oxidation with an alkali metal permanganate such as potassium permanganate, and surface treatment with a reducing agent, such as a hydroxylamine salt. Polyetherimide metal composites are also provided.

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