PHOTOIMAGEABLE COMPOSITIONS CONTAINING FUGITIVE COLORANTS

摘要

PHOTOIMAGEABLE COMPOSITIONS CONTAINING FUGITIVE COLORANTS A photoimageable composition used for forming a solder mask on a printed circuit board contains a fugitive dye which can be rendered colorless by heat and/or UV radiation after a layer of the photoimageable composition has been exposed to patterned actinic radiation and developed. -??-