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    • 5. 发明专利
    • Resist protective film material and patterning process
    • 耐腐蚀膜材料和图案处理
    • JP2013140319A
    • 2013-07-18
    • JP2012121797
    • 2012-05-29
    • Shin Etsu Chem Co Ltd信越化学工業株式会社
    • HATAKEYAMA JUN
    • G03F7/11C08F212/14H01L21/027
    • C09D145/00C08F216/10C08F220/18C08F232/08C08F2220/283C09D125/18C09D129/02G03F7/11G03F7/20
    • PROBLEM TO BE SOLVED: To provide a resist protective film material, which is effective for reducing influences of an environment on a resist film, cutting off OOB (out-of-band) light, as well as reducing a film thickness loss of a resist pattern, avoiding formation of a bridge between pattern features, and enhancing the sensitivity of the resist film, and to provide a pattern forming method using the material.SOLUTION: The resist protective film material comprises a copolymer of hydroxystyrene with acenaphthylene and/or vinylnaphthalene expressed by formula (1) as a base resin, to be used for a pattern forming process by lithography in which a photoresist layer is formed on a wafer, a protective film of the protective film material formed thereon, the resist layer is exposed and then developed. In the formula, Rrepresents H, an alkyl, alkoxy, acyloxy, cyano, nitro, amino group or a halogen atom; Rand Reach represent a hydroxy group or an alkyl group; p represents an integer of 1 to 3; and m, n1, n2 satisfy 0.3≤m≤0.98, 0≤n1≤0.7, 0≤n2≤0.7 and 0.02≤n1+n2≤0.7. By using the resist protective film material, the resist pattern can be prevented from forming a T-shaped profile due to contamination with airborne amine, and a sensitizing effect on the resist film is obtained, which enhances the sensitivity of the resist film.
    • 要解决的问题:为了提供抗蚀剂保护膜材料,其有效减少环境对抗蚀剂膜的影响,切断OOB(带外)光以及降低抗蚀剂的膜厚度损失 图案,避免形成图案特征之间的桥,并提高抗蚀剂膜的灵敏度,并提供使用该材料的图案形成方法。解决方案:抗蚀保护膜材料包括羟基苯乙烯与苊烯和/或乙烯基萘的共聚物表达 通过式(1)作为基础树脂,用于通过在晶片上形成光致抗蚀剂层的光刻的图案形成处理,形成在其上的保护膜材料的保护膜,将抗蚀剂层暴露然后显影 。 在式中,R代表H,烷基,烷氧基,酰氧基,氰基,硝基,氨基或卤素原子; Rand Reach代表羟基或烷基; p表示1〜3的整数, m,n1,n2满足0.3≤m≤0.98,0≤n1≤0.7,0≤n2≤0.7,02≤n1+n2≤0.7。 通过使用抗蚀剂保护膜材料,可以防止由于空气胺的污染而形成T形轮廓的抗蚀剂图案,并且获得对抗蚀剂膜的敏化作用,这增强了抗蚀剂膜的灵敏度。