For thick plating applications like copper pillar bump processing in semiconductor advanced packaging, Shin-Etsu MicroSi has introduced a positive tone, ultra-thick photoresist, SIPR-7126. The 7100 chemically amplified (CA) series has been in production for several years, and the SIPR-7126 has been optimized to reduce processing steps and improve removability in layers up to 100 µm […]