The present invention relates to a developable bottom antireflective coating (BARC) composition and a pattern forming method using the BARC composition. The BARC composition includes a first polymer having a first carboxylic acid moiety, a hydroxy-containing alicyclic moiety, and a first chromophore moiety; a second polymer having a second carboxylic acid moiety, a hydroxy-containing acyclic moiety, and a second chromophore moiety; a crosslinking agent; and a radiation sensitive acid generator. The first and second chromophore moieties each absorb light at a wavelength from 100 nm to 400 nm. In the patterning forming method, a photoresist layer is formed over a BARC layer of the BARC composition. After exposure, unexposed regions of the photoresist layer and the BARC layer are selectively removed by a developer to form a patterned structure in the photoresist layer. The BARC composition and the pattern forming method are especially useful for implanting levels.
本发明涉及一种可开发的底部抗反射涂层(BARC)组合物及使用该BARC组合物的图案形成方法。该BARC组合物包括第一聚合物,其具有第一羧基酸基团,含羟基的脂环族基团和第一色团基团;第二聚合物,其具有第二羧基酸基团,含羟基的非环族基团和第二色团基团;
交联剂;以及辐射敏感的酸发生剂。第一和第二色团基团吸收100纳米至400纳米波长的光线。在图案形成方法中,先形成一层BARC组合物的BARC层,再在其上形成一层光阻层。经曝光后,通过显影剂选择性地去除光阻层和BARC层的未曝光区域,形成光阻层中的图案结构。该BARC组合物和图案形成方法特别适用于植入级别。