BINARY SINUSOIDAL SUB-WAVELENGTH GRATINGS AS ALIGNMENT MARKS

    公开(公告)号:SG132640A1

    公开(公告)日:2007-06-28

    申请号:SG2006081194

    申请日:2006-11-22

    Abstract: The present invention relates to alignment marks for use on substrates, the alignment marks consisting of periodic 2-dimensional arrays of structures, the spacing of the structures being smaller than an alignment beam but larger than an exposure beam and the width of the structures varying sinusoidally from one end of an array to the other.

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