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    • 1. 发明授权
    • Methods for transferring a thin layer from a wafer having a buffer layer
    • 从具有缓冲层的晶片转移薄层的方法
    • US06991956B2
    • 2006-01-31
    • US11032844
    • 2005-01-10
    • Bruno GhyselenCécile AulnetteBénédite OsternaudNicolas Daval
    • Bruno GhyselenCécile AulnetteBénédite OsternaudNicolas Daval
    • H01L21/00H01L21/30
    • H01L21/76259H01L21/76254
    • A method for transferring a layer of semiconductor material from a wafer is described. The wafer includes a support substrate and an upper surface that includes a buffer layer of a material having a first lattice parameter. In an embodiment, the technique includes growing a strained layer on the buffer layer. The strained layer is made of a semiconductor material having a nominal lattice parameter that is substantially different from the first lattice parameter, and it is grown to a thickness that is sufficiently thin to avoid relaxation of the strain therein. The method also includes growing a relaxed layer on the strained layer. The relaxed layer is made of silicon and has a concentration of at least one other semiconductor material that has a nominal lattice parameter that is substantially identical to the first lattice parameter. The technique also includes providing a weakened zone in the buffer layer, and supplying energy to detach a structure at the weakened zone. The structure includes a portion of the buffer layer, the strained layer and the relaxed layer. Lastly; the method includes enriching the concentration of the at least one other semiconductor material in the relaxed layer of the structure.
    • 描述了从晶片转移半导体材料层的方法。 晶片包括支撑基板和包括具有第一晶格参数的材料的缓冲层的上表面。 在一个实施例中,该技术包括在缓冲层上生长应变层。 应变层由具有与第一晶格参数基本不同的标称晶格参数的半导体材料制成,并且其生长到足够薄的厚度以避免其中的应变松弛。 该方法还包括在应变层上生长松弛层。 松弛层由硅制成,并且具有至少一种其它半导体材料的浓度,其具有基本上与第一晶格参数相同的标称晶格参数。 该技术还包括在缓冲层中提供弱化区域,并提供能量以在弱化区域分离结构。 该结构包括缓冲层的一部分,应变层和松弛层。 最后; 该方法包括在结构的松弛层中富集至少一种其它半导体材料的浓度。