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    • 6. 发明申请
    • Silicon Wafer and Method For Producing It
    • 硅晶片及其生产方法
    • US20120039786A1
    • 2012-02-16
    • US13191534
    • 2011-07-27
    • Wilfried von AmmonGudrun KissingerDawid Kot
    • Wilfried von AmmonGudrun KissingerDawid Kot
    • C01B33/02F24J3/00
    • H01L21/3225C30B29/06C30B33/02
    • Silicon wafers having an oxygen concentration of 5·1017 to 7.5·1017 cm−3 have the following BMD densities after the following thermal processes, carried out alternatively: a BMD density of at most 1·108 cm−3 after a treatment for three hours at 780° C. and subsequently for 16 hours at 1000° C., and a BMD density of at least 1·109 cm−3 after heating of the silicon wafer at a heating rate of 1 K/min from a start temperature of 500° C. to a target temperature of 1000° C. and subsequent holding at 1000° C. for 16 hours. The wafers are prepared by a method of irradiation of a heated wafer with flashlamp which delivers energy which is from 50 to 100% of the energy density necessary for melting the wafer surface.
    • 氧化浓度为5×1017〜7.5×1017cm-3的硅片在以下热处理后具有以下BMD密度:交替进行处理3小时后的至少1×10 8 cm -3的BMD密度 在780℃下,随后在1000℃下进行16小时,并且从起始温度500℃以1K /分钟的加热速率加热硅晶片之后,BMD密度为至少1×10 9 cm -3。 ℃至目标温度为1000℃,随后在1000℃下保持16小时。 通过用闪光灯照射加热的晶片的方法制备晶片,其传递能量,其是熔化晶片表面所需的能量密度的50至100%。