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    • 6. 发明申请
    • SUBSTRATE PROCESSING METHOD AND STORAGE MEDIUM
    • 基板加工方法和储存介质
    • US20120214315A1
    • 2012-08-23
    • US13400247
    • 2012-02-20
    • Eiichi NishimuraTakashi SoneFumiko Yamashita
    • Eiichi NishimuraTakashi SoneFumiko Yamashita
    • H01L21/3065
    • H01L21/32137
    • In a substrate processing method, a polysilicon layer 38 on a wafer W is etched with a bromine cation 45a and a bromine radical 45b in plasma generated from a processing gas containing a hydrogen bromide gas, an oxygen gas, and a nitrogen trifluoride gas, and then, is ashed with an oxygen radical 46 and a nitrogen radical 47 in plasma generated from a processing gas containing an oxygen gas and a nitrogen gas. Thereafter, the polysilicon layer 38 is etched with a fluorine cation 48a and a fluorine radical 48b in plasma generated from a processing gas containing an argon gas and a nitrogen trifluoride gas. While the polysilicon layer 38 is ashed, an oxidation process is performed on a silicon bromide generated by etching the polysilicon layer 38 with the bromine cation 45a.
    • 在基板处理方法中,用含有溴化氢气体,氧气和三氟化氮气体的处理气体产生的等离子体中的溴阳离子45a和溴根45b蚀刻晶片W上的多晶硅层38, 然后,由含有氧气和氮气的处理气体产生的等离子体中的氧自由基46和氮根47被灰化。 此后,用含有氩气和三氟化氮气体的处理气体产生的等离子体中的氟阳离子48a和氟根48b进行蚀刻。 当多晶硅层38灰化时,对通过用溴阳离子45a蚀刻多晶硅层38产生的溴化硅进行氧化处理。