SILICON WAVEGUIDE ON BULK SILICON SUBSTRATE AND METHODS OF FORMING
    50.
    发明申请
    SILICON WAVEGUIDE ON BULK SILICON SUBSTRATE AND METHODS OF FORMING 有权
    硅基硅衬底上的硅波形和形成方法

    公开(公告)号:US20150340273A1

    公开(公告)日:2015-11-26

    申请号:US14283984

    申请日:2014-05-21

    Abstract: Various methods include: forming an optical waveguide in a bulk silicon layer, the optical waveguide including a set of shallow trench isolation (STI) regions overlying a silicon substrate region; ion implanting the silicon substrate to amorphize a portion of the silicon substrate; forming a set of trenches through the STI regions and into the underlying silicon substrate region; undercut etching the silicon substrate region under the STI regions through the set of trenches to form a set of cavities, wherein the at least partially amorphized portion of the silicon substrate etches at a rate less than an etch rate of the silicon substrate; and sealing the set of cavities.

    Abstract translation: 各种方法包括:在体硅层中形成光波导,光波导包括覆盖硅衬底区域的一组浅沟槽隔离(STI)区域; 离子注入硅衬底以使硅衬底的一部分非晶化; 通过STI区域形成一组沟槽并进入下面的硅衬底区域; 底切蚀刻在STI区域下方的硅衬底区域通过该组沟槽以形成一组空穴,其中硅衬底的至少部分非晶化部分以小于硅衬底的蚀刻速率的速率蚀刻; 并密封该组腔。

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