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    • 2. 发明授权
    • Wafer thinning techniques
    • 晶圆薄化技术
    • US06764573B2
    • 2004-07-20
    • US09977158
    • 2001-10-11
    • Richard LaiHarvey N. RogersYaochung ChenMichael E. Barsky
    • Richard LaiHarvey N. RogersYaochung ChenMichael E. Barsky
    • B08B302
    • H01L21/30612H01L21/302H01L21/67086H01L21/67346
    • Apparatuses (10, 100), and methods of using same, for the simultaneous thinning of the backside surfaces of a plurality of semiconductor wafers (W) using a non-crystallographic and uniform etching process, are described. The apparatuses (10, 100) include a fixture (12, 102) having a plurality of horizontal receptacles (14, 16, 18, 20, 104, 106, 108, 110) for receiving the semiconductor wafers (W). The loaded fixtures (12, 102) are then immersed into an etchant solution (36, 146) that is capable of isotropically removing a layer of semiconductor material from the backside surface of the semiconductor wafers (W). The etchant solution (36, 146) is preferably heated to about 40° C.-50° C. and constantly stirred with a magnetic stirring bar (48, 158). Once a sufficient period of time has elapsed, the thinned semiconductor wafers (W) are removed from the etchant solution (36, 146). The apparatuses (10, 100) are capable of simultaneously thinning several semiconductor wafers (V) down to a final thickness of about 25 &mgr;m.
    • 描述了使用非结晶和均匀蚀刻工艺的装置(10,100)及其使用方法,用于同时薄化多个半导体晶片(W)的背面。 装置(10,100)包括具有用于接收半导体晶片(W)的多个水平插座(14,16,18,20,104,106,108,110)的固定装置(12,102)。 然后将装载的固定装置(12,102)浸入能够从半导体晶片(W)的背面各向同性地去除半导体材料层的蚀刻剂溶液(36,146)中。 蚀刻剂溶液(36,146)优选加热至约40℃-50℃,并与磁力搅拌棒(48,158)持续搅拌。 一旦经过足够的时间,就从蚀刻剂溶液(36,146)中除去变薄的半导体晶片(W)。 装置(10,100)能够同时使多个半导体晶片(V)变薄至约25μm的最终厚度。