| abstract |
PURPOSE:To simplify a heating step and to speed up a manufacturing process by using a photosensitive resin compsn. comprising an alkali-soluble polyfunctional polyester acrylate monommer or oligomer, a photopolymn. initiator, and a sensitizer, as a photoresist for a printed circuit plate. CONSTITUTION:An alkali-soluble polyfunctional polyester acrylate monomer or oligomer used for the essential component of a phototsensitive resin compsn. gives superior physical property to a coating film and ahrdenability characteristics and permits easy peeling of the unhardened part and hardened part due to exposure using an aq. alkaline soln. Said polyfunctional polyester acrylate is a compd. having plural acryloyloxy groups, such as (CH2=CHCOOCH2)2C(CH3)2 or (CH2=CHCOOCH2)3C-C2H5. Preferably, it has 150-1,000mol.wt. As a polymn. initiator, benzoin or benzoin ethyl ether initiating photopolymn. reaction with UV rays is used in an amt. of 1-20pts.wt. per 100pts.wt. of said monomer or oligomer. As said sensitizer, alkylamines, such as triethylamine, and ethyleneamines, such as triethylenetetraamine, are used in an amt. of 1-2pts.wt. per 100pts.wt. of said monomer or oligomer. |