Method for the preparation of a semiconductor substrate with a non-uniform distribution of stabilized oxygen precipitates
    2.
    发明申请
    Method for the preparation of a semiconductor substrate with a non-uniform distribution of stabilized oxygen precipitates 审中-公开
    制备具有不均匀分布稳定的氧沉淀物的半导体衬底的方法

    公开(公告)号:US20060075960A1

    公开(公告)日:2006-04-13

    申请号:US11284120

    申请日:2005-11-21

    IPC分类号: C30B11/00

    CPC分类号: H01L21/3225 Y10T117/10

    摘要: A process for nucleating and growing oxygen precipitates in a silicon wafer, including subjecting a wafer having a non-uniform concentration of crystal lattice vacancies with the concentration of vacancies in the bulk layer being greater than the concentration of vacancies in the surface layer to a non-isothermal heat treatment to form of a denuded zone in the surface layer and to cause the formation and stabilization of oxygen precipitates having an effective radial size 0.5 nm to 30 nm in the bulk layer. The process optionally includes subjecting the stabilized wafer to a high temperature thermal process (e.g. epitaxial deposition, rapid thermal oxidation, rapid thermal nitridation and etc.) at temperatures in the range of 1000 OC to 1275 OC without causing the dissolution of the stabilized oxygen precipitates.

    摘要翻译: 一种用于在硅晶片中成核和生长氧沉淀物的方法,包括使具有不均匀浓度的晶格空位的晶片与本体层中的空位浓度大于表层中的空位浓度, 进行等温热处理以形成表面层中的剥离区域,并且使本体层中具有0.5nm至30nm有效径向尺寸的氧沉淀物的形成和稳定化。 该方法任选地包括在1000℃至1275℃范围内的温度下使稳定的晶片经受高温热处理(例如外延沉积,快速热氧化,快速热氮化等),而不会使稳定的氧沉淀物溶解 。