| 摘要 |
PURPOSE: Negative-acting photoimageable compositions such as those used as photoresists in the art of printed circuitry are provided. CONSTITUTION: Negative-acting photoimageable compositions in accordance with the invention are provided which comprise I) between about 30 wt % and 100%, preferably between about 30 about 80 wt % based on total weight of I) plus II) plus III) of a binder polymer having sufficient acid functionality to render the photoimageable composition developable in alkaline aqueous solution, between 0 and about 70 wt %, preferably at least about 20 wt % based on total weight of I) plus II) plus III) of an addition-polymerizeable, non-gaseous.alpha.,.beta.-ethylenically unsaturated compounds) capable of forming a high polymer by free-radical initiated chain-propagating addition polymerization, and III) between about 0.1 and about 20 wt % based on total weight of I) plus II) plus III) of a photoinitiator chemical system. |
