申请人:Kansai Research Institute (KRI)
公开号:EP0962825A1
公开(公告)日:1999-12-08
A photosensitive resin composition comprises a base resin (e.g., novolak resins, polyvinylphenol-series polymers), a first photoactive ingredient (e.g., diazobenzoquinone derivatives, diazonaphthoquinone derivatives) and a second photoactive ingredient (e.g., mixtures with azide compounds) each having an absorption range at wavelength λ1 or λ2, the wavelengths thereof being different from each other. Between the first and second photoactive ingredients, at least one photoactive ingredient is substantially inert at the absorption wavelength of the other. After exposing the photosensitive resin composition to a light to form a pattern, the whole surface of the photosensitive layer is exposed to a light of the other wavelength to make the surface hardly soluble (in the case a positive pattern is formed) or readily soluble (in the case a negative pattern is formed) in a developer, and developed, thereby forming a pattern of high resolution. Utilizing an existing exposure system, there can be obtained photosensitive resin compositions (especially, resists for semiconductor production) having improved sensitivity and resolution.
光敏树脂组合物包括基体树脂(如酚醛树脂、聚乙烯基苯酚系列聚合物)、第一种光活性成分(如重氮苯醌衍生物、重氮萘醌衍生物)和第二种光活性成分(如与叠氮化合物的混合物),每种光活性成分在波长λ1或λ2处均有吸收范围,其波长互不相同。在第一种和第二种光活性成分之间,至少有一种光活性成分在另一种光活性成分的吸收波长处基本上是惰性的。将感光树脂组合物曝光形成图案后,将感光层的整个表面曝光在另一波长的光下,使其表面难溶于显影剂(在形成正图案的情况下)或易溶于显影剂(在形成负图案的情况下),然后进行显影,从而形成高分辨率的图案。利用现有的曝光系统,可以获得具有更高灵敏度和分辨率的光敏树脂组合物(特别是用于半导体生产的抗蚀剂)。