摘要:
A photoresist composition useful for the preparation of semiconductors and to be irradiated by light with a wavelength of from 330 to 450 nm, which comprises (1) an alkali-soluble resin, (2) a quinone-diazide type photosensitive compound and (3) a solvent, wherein(a) said quinone-diazide type photosensitive compound is composed mainly of a quinone-diazide sulfonate of a novolac resin produced by polycondensation of at least one phenolic compound of the following formula (A1) or (A2) and at least one ketone or aldehyde derivative of the following formula (B),(b) the weight-average molecular weight (the analytical value calculated as polystyrene by gel permeation chromatography) of said novolac resin is from 400 to 2,000 in the case of the novolac resin derived from the phenolic compound of the formula (A1) and from 600 to 2,200 in the case of the novolac resin derived from the phenolic compound of the formula (A2), and(c) the esterification ratio of said quinone-diazide sulfonate (the number of quinone-diazide sulfonyl groups per molecule of the quinone-diazide sulfonate.times.100/the number of hydroxyl groups per molecule of the novolac resin) is from 40 to 90%: ##STR1## wherein R is an alkyl group or an aryl group, provided that a plurality of R may be the same or different, R.sup.1 is an alkyl group, provided that a plurality of R.sup.1 may be the same or different, each of R.sup.2 and R.sup.3 is a hydrogen atom, an alkyl group or an aryl group, l is an integer of from 0 to 3, m is an integer of from 0 to 2 and n is an integer of from 2 to 4, provided that the sum of m+n is from 2 to 4.
摘要:
A process for producing aromatic carbamates in high yield is described, which comprises reacting aromatic nitro compounds, organic compounds containing a hydroxy group, and carbon monoxide in the presence of a catalyst comprising: (1) a platinum group metal or its compound, (2) metallic vanadium or its compound, (3) metallic iron or its compound, (4) a halogen atom, and (5) a tertiary amine, wherein the amount of each component used and the composition are adjusted within specific ranges.