Senior/ Staff NPI Wafer Bumping/Fan-Out Process Engineer

Singapore. Posted 2 months ago

The role

This person will lead process development and technical support for wafer bumping and Fan-Out processes for silicon photonic chip wafers. They will design process flows, evaluate materials, and manage reliability and failure analysis.

What you will do

Lead process development and technical support of wafer bumping and Fan-Out process
Design and optimize early-stage process flows for wafer bumping, thin-film sputtering, lithography, electroplating, and ball drop execution
Evaluate and qualify new manufacturing raw materials
Design and execute DOE plans to characterize thermal and mechanical stress
Lead reliability validations including TCT, HAST and HTS
Own root-cause diagnostics of structural failure modes
Utilize SEM, CSAM, and physical cross-sectioning for analytics
Optimize key bumping process parameters to improve bump uniformity and yield
Manage incoming wafer quality control and establish SPC control plans
Compile process SOP, WI, process failure reports and engineering change documents

Required qualifications

Bachelor or Master degree in Materials Science, Chemical Engineering, Mechanical Engineering, Microelectronics, or an equivalent technical discipline
5+years of hands-on wafer bumping or Fan-out process integration or development experience at OSAT or IDM internal advanced packaging line
Deep practical understanding of photolithography, wet etching, chemical vapor deposition (CVD), and physical vapor deposition (PVD), moulding process adapted for backend bump fabrication
Comprehensive command of finite element simulation principles regarding warpage, thermal dissipation, and structural mechanical integrity
Solid working expertise with industry validation methodologies including FMEA, SPC controls, and structured 8D problem-solving tools
High proficiency with robust analytical platforms like JMP, Minitab, or Python

Nice to have

Process exposure/experience on interposer, 2.5D/3D, chip on wafers on substrate

About the company

lumilens