COMPOSITION FOR FORMING SILICON-CONTAINING RESIST UNDERLAYER FILM AND PATTERNING PROCESS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP3686256A1
公开(公告)日:2020-07-29
A composition for forming a silicon-containing resist underlayer film contains at least: one or more compounds shown by the following general formula (P-0); and a thermally crosslinkable polysiloxane (Sx),
where R100 represents a divalent organic group substituted with one or more fluorine atoms; R101 and R102 each independently represent a linear, branched, or cyclic monovalent hydrocarbon group having 1 to 20 carbon atoms optionally substituted with a hetero-atom or optionally interposed by a hetero-atom; R103 represents a linear, branched, or cyclic divalent hydrocarbon group having 1 to 20 carbon atoms optionally substituted with a hetero-atom or optionally interposed by a hetero-atom; R101 and R102, or R101 and R103, are optionally bonded to each other to form a ring with a sulfur atom in the formula; and L104 represents a single bond or a linear, branched, or cyclic divalent hydrocarbon group having 1 to 20 carbon atoms optionally substituted with a hetero-atom or optionally interposed by a hetero-atom. Thus, the present invention provides a resist underlayer film capable of improving LWR and CDU in a fine pattern formed in a chemically amplified resist that uses an acid as a catalyst.
一种用于形成含硅抗蚀剂底层薄膜的组合物至少包含:一种或多种如下通式所示的化合物(P-0);以及一种可热交联的聚硅氧烷(Sx)、
其中 R100 代表被一个或多个氟原子取代的二价有机基团;R101 和 R102 各自独立地代表具有 1 至 20 个碳原子的线性、支链或环状一价烃基团,可选择被一个杂原子取代或被一个杂原子插入;R103 代表具有 1 至 20 个碳原子的线性、支链或环状二价烃基团,可选择被一个杂原子取代或被一个杂原子插入;R101 和 R102,或 R101 和 R103,可选地相互键合,以形成式中带有硫原子的环;以及 L104 代表单键或具有 1 至 20 个碳原子的线性、支链或环状二价烃基,可选地被杂原子取代或可选地被杂原子夹杂。因此,本发明提供了一种抗蚀剂底层薄膜,能够改善在使用酸作为催化剂的化学放大抗蚀剂中形成的精细图案的 LWR 和 CDU。