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    • 3. 发明公开
    • PROCEDE DE LITHOGRAPHIE A DEDOUBLEMENT DE PAS
    • LITHOGRAFISCHES VERFAHRENFÜRDOPPELTEILUNG
    • EP2577395A1
    • 2013-04-10
    • EP11721525.1
    • 2011-05-25
    • Commissariat à l'Énergie Atomique et aux Énergies Alternatives
    • PAIN, LaurentBELLEDENT, JérômeBARNOLA, Sébastien
    • G03F7/00B81C1/00
    • B44C1/227B82Y10/00B82Y40/00G03F7/0002G03F7/0035H01L21/0337H01L21/31144H01L21/76811H01L21/76813H01L21/76816H01L21/76897
    • The invention relates to lithography for etching very high-density patterns on a substrate, for example for producing microelectronic integrated circuits. A high-density pattern is etched using a combination of a plurality of less-dense partial patterns; a sacrificial film is formed on a substrate (10) and the sacrificial film is etched in a first partial pattern; spacers are formed on the edges of the elements of the sacrificial film thus etched, the spacers defining a second partial pattern; and then the sacrificial film is removed so as to leave in place only the spacers (16). Next, a film (22) sensitive to an electron beam is deposited between the spacers with a thickness that is smaller than or equal to the height of the spacers; and this sensitive film is exposed, by means of an electron beam, in a third partial pattern such that there remains on the substrate a final pattern of regions containing no spacers and no sensitive film, this pattern resulting from the combination of the second and third partial patterns and having a higher density than each of the partial patterns.
    • 基于几个较不密集的部分图案的组合来蚀刻基底上的非常致密的图案的平版印刷方法; 在衬底上形成牺牲层,并根据第一部分图案进行蚀刻; 间隔物形成在牺牲层的元件的边缘上,间隔物限定第二部分图案; 然后去除牺牲层,仅留下间隔物。 随后将电子束敏感的层沉积在间隔物之间​​的厚度小于或等于间隔物的高度,并且该敏感层根据第三部分图案使用电子束曝光,使得保留在基底上 缺少间隔物和敏感层的区域的最终图案,该图案由第二和第三部分图案的组合产生并且具有比每个部分图案更高的密度。