会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 10. 发明授权
    • Method for improving visibility of alignment target in semiconductor
processing
    • 用于提高半导体处理中的对准目标的可见性的方法
    • US06015750A
    • 2000-01-18
    • US7694
    • 1998-01-15
    • James A. BruceSteven John HolmesRobert K. Leidy
    • James A. BruceSteven John HolmesRobert K. Leidy
    • H01L23/544G01B11/27
    • H01L23/544H01L2223/54453H01L2924/0002
    • Methods are disclosed that enhance the contrast between alignment targets and adjacent materials on a semiconductor wafer. According to a first embodiment, the TiN layer that is deposited during an earlier processing step is stripped away to enhance the reflectivity of the metal layer. According to a second embodiment, a reflective coating is added over the metal layer to enhance the reflectivity of the metal layer. According to a third embodiment, a reflective coating is added over the entire wafer to enhance the reflectivity of the metal layer. According to a fourth embodiment, an anti-reflective coating in a sandwich structure is added to reduce the reflectivity of the material adjacent the alignment targets. According to a fifth embodiment, an organic anti-reflective coating is added to reduce the reflectivity of the material adjacent the alignment targets. All of these embodiments result in a contrast between the alignment target and the adjacent material that is more consistent over variations in oxide thickness. The more uniform contrast makes it easier for the stepper system to identify the edges of the alignment targets, resulting in a more exact placement of the mask.
    • 公开了增强半导体晶片上的对准目标和相邻材料之间的对比度的方法。 根据第一实施例,在较早处理步骤期间沉积的TiN层被剥离以增强金属层的反射率。 根据第二实施例,在金属层上添加反射涂层以增强金属层的反射率。 根据第三实施例,在整个晶片上添加反射涂层以增强金属层的反射率。 根据第四实施例,添加夹层结构中的抗反射涂层以降低邻近对准靶的材料的反射率。 根据第五实施例,添加有机抗反射涂层以降低邻近对准靶的材料的反射率。 所有这些实施例导致对准目标和相邻材料之间的对比度,其与氧化物厚度的变化更一致。 更均匀的对比度使得步进系统更容易识别对准目标的边缘,导致掩模更准确的放置。