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    • 54. 发明申请
    • Selective provision of a diblock copolymer material
    • 选择性提供二嵌段共聚物材料
    • US20050250053A1
    • 2005-11-10
    • US10840535
    • 2004-05-06
    • Eugene MarshDaryl NewTrung Doan
    • Eugene MarshDaryl NewTrung Doan
    • G03F7/00G03F7/039H01L21/312
    • H01L21/0274G03F7/039H01L21/312
    • Disclosed herein are techniques for using diblock copolymer (DBCP) films as etch masks to form small dots or holes in integrated circuit layers. In an embodiment, the DBCP film is deposited on the circuit layer to be etched. Then the DCBP film is confined to define an area of interest in the DCBP film in which hexagonal domains will eventually be formed. Such confinement can constitute masking and exposing the DCBP film using photolithographic techniques. Such masking preferably incorporates knowledge of the domain spacing and/or grain size of the to-be-formed domains in the area of interest to ensure that a predictable number and/or orientation of the domains will result in the area of interest, although this is not strictly necessary in all useful embodiments. Domains are then formed in the area of interest in the DBCP film which comprises a hexagonal array of cylindrical domains in a matrix. The film is then treated (e.g., with osmium or ozone) to render either the domains or the matrix susceptible to removal, while the other component is then used as a mask to etch either dots or holes in the underlying circuit layer.
    • 本文公开了使用二嵌段共聚物(DBCP)膜作为蚀刻掩模在集成电路层中形成小点或孔的技术。 在一个实施例中,DBCP膜沉积在待蚀刻的电路层上。 然后将DCBP膜限制在DCBP膜中限定最终将形成六方结构域的感兴趣区域。 这种约束可以使用光刻技术构成掩蔽和暴露DCBP膜。 这种掩蔽优选地结合了感兴趣区域中待形成区域的结构域间隔和/或晶粒尺寸的知识,以确保域的可预测数量和/或取向将导致感兴趣的区域,尽管这 在所有有用的实施例中并不是绝对必要的。 然后在DBCP膜中的感兴趣区域中形成畴,其包括在矩阵中的圆柱形域的六边形阵列。 然后将膜处理(例如,用锇或臭氧)以使得区域或基质易于除去,而另一种组分然后用作掩模来蚀刻底层电路层中的任何点或孔。