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    • 44. 发明申请
    • SELECTIVE EPITAXY PROCESS WITH ALTERNATING GAS SUPPLY
    • 具有替代气体供应的选择性外延工艺
    • US20060216876A1
    • 2006-09-28
    • US11421156
    • 2006-05-31
    • Yihwan KimArkadii Samoilov
    • Yihwan KimArkadii Samoilov
    • H01L21/84H01L21/8238H01L21/336H01L21/20H01L21/31
    • H01L29/165H01L21/02381H01L21/02529H01L21/02532H01L21/02576H01L21/02579H01L21/0262H01L21/02636H01L29/66628H01L29/7834H01L29/7848Y10S438/933Y10S438/969
    • In one example, a method of epitaxially forming a silicon-containing material on a substrate surface is presented which includes positioning a substrate into a process chamber. The substrate has a monocrystalline surface and at least a second surface, such as an amorphous surface and/or a polycrystalline surface. The substrate is exposed to a deposition gas to deposit an epitaxial layer on the monocrystalline surface and a polycrystalline layer on the second surface. The deposition gas preferably contains a silicon source and at least a second elemental source, such as a germanium source, a carbon source and/or combinations thereof. Thereafter, the method further provides exposing the substrate to an etchant gas to etch the polycrystalline layer and the epitaxial layer in a manner such that the polycrystalline layer is etched at a faster rate than the epitaxial layer. The method may further include a deposition cycle that includes repeating the exposure of the substrate to the deposition and etchant gases to form a silicon-containing material with a predetermined thickness.
    • 在一个实例中,提出了在衬底表面上外延形成含硅材料的方法,其包括将衬底定位到处理室中。 衬底具有单晶表面和至少第二表面,例如非晶表面和/或多晶表面。 将衬底暴露于沉积气体,以在第一表面上沉积外延层和在第二表面上沉积多晶层。 沉积气体优选地包含硅源和至少第二元素源,例如锗源,碳源和/或其组合。 此后,该方法进一步提供将衬底暴露于蚀刻剂气体以蚀刻多​​晶层和外延层,使得以比外延层更快的速率蚀刻多晶层。 该方法还可以包括沉积循环,其包括重复将衬底暴露于沉积和蚀刻剂气体以形成具有预定厚度的含硅材料。