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    • 5. 发明授权
    • Method of making through wafer vias
    • 通过晶片通孔制作方法
    • US07678696B2
    • 2010-03-16
    • US12188230
    • 2008-08-08
    • Paul Stephen AndryEdmund Juris SprogisCornelia Kang-I Tsang
    • Paul Stephen AndryEdmund Juris SprogisCornelia Kang-I Tsang
    • H01L21/44
    • H01L21/76898
    • A method of making a through wafer via. The method includes: forming a trench in a semiconductor substrate, the trench open to a top surface of the substrate; forming a polysilicon layer on sidewalls and a bottom of the trench; oxidizing the polysilicon layer to convert the polysilicon layer to a silicon oxide layer on the sidewalls and bottom of the trench, the silicon oxide layer not filling the trench; filling remaining space in the trench with an electrical conductor; and thinning the substrate from a bottom surface of the substrate and removing the silicon oxide layer from the bottom of the trench. The method may further include forming a metal layer on the silicon oxide layer before filling the trench.
    • 制造通过晶片通孔的方法。 该方法包括:在半导体衬底中形成沟槽,沟槽通向衬底的顶表面; 在沟槽的侧壁和底部上形成多晶硅层; 氧化多晶硅层以将多晶硅层转变成沟槽的侧壁和底部上的氧化硅层,氧化硅层不填充沟槽; 用电导体填充沟槽中的剩余空间; 以及从衬底的底表面使衬底细化并从沟槽的底部去除氧化硅层。 该方法还可以包括在填充沟槽之前在氧化硅层上形成金属层。