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    • 1. 发明授权
    • Gas distribution apparatus for semiconductor processing
    • 用于半导体加工的气体分配装置
    • US6432831B2
    • 2002-08-13
    • US81497201
    • 2001-03-23
    • LAM RES CORP
    • DHINDSA RAJINDERHAO FANGLILENZ ERIC
    • H05H1/46C23C16/44C23C16/455H01J37/32H01L21/302
    • C23C16/45565C23C16/455C23C16/45572H01J37/3244
    • A gas distribution system for uniformly or non-uniformly distributing gas across the surface of a semiconductor substrate. The gas distribution system includes a support plate and a showerhead which are secured together to define a gas distribution chamber therebetween. A baffle assembly including one or more baffle plates is located within the gas distribution chamber. The baffle arrangement includes a first gas supply supplying process gas to a central portion of the baffle chamber and a second gas supply supplying a second process gas to a peripheral region of the baffle chamber. Because the pressure of the gas is greater at locations closer to the outlets of the first and second gas supplies, the gas pressure at the backside of the showerhead can be made more uniform than in the case with a single gas supply. In one arrangement, the first and second gas supplies open into a plenum between a top baffle plate and a temperature controlled support member wherein the plenum is divided into the central and peripheral regions by an O-ring. In a second arrangement, the first gas supply opens into the central region above an upper baffle plate and the second gas supply opens into the periphery of a plenum between the upper baffle plate and a lower baffle plate.
    • 一种用于均匀或不均匀地分布气体跨越半导体衬底的表面的气体分配系统。 气体分配系统包括固定在一起以在其间限定气体分配室的支撑板和喷头。 包括一个或多个挡板的挡板组件位于气体分配室内。 挡板装置包括向挡板室的中心部分供应处理气体的第一气体供应源和向挡板室的周边区域供应第二处理气体的第二气体供应源。 因为在靠近第一和第二气体供应出口的位置处的气体的压力较大,所以可以使喷头背面的气体压力比单个气体供应的情况更均匀。 在一种布置中,第一和第二气体供应开放在顶部挡板和温度控制的支撑构件之间的增压室中,其中气室通过O形环分成中心区域和外围区域。 在第二种布置中,第一气体供应通向上挡板上方的中心区域,第二气体供应通道进入上挡板和下挡板之间的集气室的周边。