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    • 5. 发明授权
    • Pattern fabricating method
    • 图案制作方法
    • US4981771A
    • 1991-01-01
    • US309026
    • 1989-02-07
    • Kozo MochijiYasunari SodaTakeshi Kimura
    • Kozo MochijiYasunari SodaTakeshi Kimura
    • G03F1/22G03F7/20
    • G03F1/22G03F7/2061Y10S430/168
    • When a pattern is to be fabricated by a lithography using radiation on a heavy metal layer formed on a substrate, secondary electrons are generated in a diverging form from the heavy metal layer by irradiation with a radioactive ray to expose the resist. As a result, the accuracy of the pattern to be formed on the resist is reduced. In order to prevent this, a layer to be transferred, a substrate to be worked, a mask and so on are formed with a film capable of absorbing the secondary electrons so that secondary electrons generated from the heavy metal layer may not reach the resist film. Although a pattern having a thickness of 2 microns or less could not be fabricated according to the prior art, a pattern as thin as 1.5 microns can be fabricated by the method of the present invention.
    • 当通过使用在衬底上形成的重金属层上的辐射进行光刻来制造图案时,通过用放射线照射而从重金属层以分散的形式产生二次电子以暴露抗蚀剂。 结果,降低了在抗蚀剂上形成的图案的精度。 为了防止这种情况,可以用能够吸收二次电子的膜形成待转移层,待加工基板,掩模等,使得从重金属层产生的二次电子可能不到达抗蚀剂膜 。 虽然根据现有技术不能制造2微米或更小的厚度的图案,但是可以通过本发明的方法制造薄至1.5微米的图案。