Senior Process Engineer – DFR Developer & Stripper

Job/Position Summary The Senior Process Engineer – DFR Developer & Stripper is responsible for the development, optimization, qualification, and control of dry film resist (DFR) developing and stripping processes used in glass panel semiconductor manufacturing.

The role focuses on achieving robust resist pattern fidelity, residue-free stripping, defect reduction, and stable process performance for downstream metallization, plating, and advanced packaging operations.

This position plays a critical role in establishing reliable lithography-related wet processing technologies for glass substrate integration and panel-level packaging manufacturing.

Primary Responsibilities Develop and optimize DFR developing and stripping processes for glass substrates, panel-level packaging, and advanced semiconductor applications.

Define and control critical process parameters, including developer/stripper chemistry concentration, temperature, spray pressure, conveyor speed, immersion time, and drying conditions.

Own and improve DFR process performance with focus on critical dimension control, residue reduction, pattern integrity, adhesion performance, and process stability.

Lead root cause analysis and corrective actions for defects, including incomplete development, resist residues, scumming, pattern collapse, undercut, delamination, staining, and surface contamination.

Drive process qualification, DOE execution, and recipe optimization for new tools, resist materials, stripping chemistries, and substrate types.

Work closely with lithography, wet chemistry, and analytical teams to ensure chemistry stability, contamination control, and consistent process performance.

Develop and maintain SOPs, process specifications, OCAPs, process control plans, and manufacturing documentation for DFR develop and strip operations.

Support pilot line and high-volume manufacturing ramp activities with emphasis on yield improvement, defect reduction, and process robustness.

Ensure compliance with EHS and chemical safety requirements while driving continuous improvement in chemical usage, cycle time, waste reduction, and manufacturing efficiency.

Own equipment process qualification activities, including SAT, installation, operational, and performance qualifications, process acceptance, and production release for DFR developer and stripper tools.

Collaborate with equipment engineering teams to improve tool capability, spray uniformity, conveyor stability, filtration performance, and equipment reliability.