Summary: New positive‐type photoresist systems based on enzymatically synthesized polyphenols have been developed. The photoresist thin film consisting of the polyphenol and a diazonaphthoquinone derivative was prepared on copperfoil‐coated epoxy resins and exposed to UV light with different doses. The polyphenols from the bisphenol monomers exhibited high photosensitivity, comparable with a conventional cresol novolac. The sensitivity could be controlled by changing the structure of the polyphenols. Furthermore, the present photoresist showed excellent etching resistance.
Characteristic exposure curves of poly( 1 )/DNQ and poly( 5 )/DNQ (both 70:30 wt.‐%) with different phenylene unit contents. 相似文献
A bifunctional vinyl ether urethane derivative (BVU) was synthesized and characterzed. Photoresist systems consisting of BVU and a photoacid generator (PAG) along with various matrix polymers were prepared and the photoresist characteristics were evaluated. In the presence of BVU and a PAG, poly(methylmethacrylate-co-acrylic acid) and poly(methylmethacrylate) exhibited positive and negative tone behavior, respectively, where as poly(p-hydroxystyrene) showed both positive and negative working properties depending on the prebake temperature of the system. The depandence of the photoresist behaviors on these matrix polymers was studied. The mechanism of the thermal and photochemical reactions was revealed. 相似文献
This paper reports the fabrication of a single expose multideveloping positive Diazonaphthoquinone (DNQ) /Novolak photoresist capable of simplifying the fabrication process of color filter plates composed of red, green, blue pixels and black matrix. Film thickness retention was measured on multideveloping photoresist(MDPR) containing novolak resins made from various phenolic compounds including cresols, xylenols, trimethylphenol, resorcinol and their copolymers. It was found that there were suitable combinations of phenolic compounds to exhibit appropriate thermal stability, wide process window as well as compatibility to electrodeposition of color films. 相似文献
The heterogenization of palladium complexes on silica as well as on functionalized styrene/divinylbenzene crosslinked resins and linear poly(styrene) is described. In particular, palladium (0) and palladium (II) derivatives were anchored to the above polymeric systems through their functionalization with bidentate ligands such as acetylacetonate and 1,3-bis(diphenylphosphino)propane moieties. The resulting heterogenized complexes were checked in the catalytic telomerization of 1,3-butadiene with methanol. Their performances were studied in terms of activity and selectivity to telomers. Whereas the heterogenization of palladium complexes either on silica or on polymer resins via the acetylacetonate ligand resulted labile during the catalytic cycle, the polymer-bound palladium complexes via the diphosphine ligand, when activated by an alkoxide, displayed activity and selectivity comparable with those of the corresponding homogeneous counterparts, without appreciable metal leaching in solution. 相似文献