CoW Development Engineer

Purpose of the Job:

• To support R&D activities for 2.5D wafer-level packaging (WLP) processes—including Die Preparation, Chip Attach, and Mold—focusing on process reliability, manufacturability, and integration for advanced semiconductor packages.

Key Job Accountabilities:

• Develop and optimize key 2.5D CoW (Chip-on-Wafer) processes: Die Preparation: grinding, laser grooving, dicing saw Chip Attach: TCB (Thermo-Compression Bonding), LCB (Laser Compression Bonding) Mold: compression or transfer mold for warpage and protection
• Perform material evaluation and reliability analysis (e.g., XRF, shear test)
• Conduct DOE/FMEA for robust process design and improvement
• Work closely with cross-functional teams (e.g., Bumping, RDL, Failure Analysis) to enable seamless process integration
• Track and analyze industry trends in equipment, materials, and technologies
• Support new product introduction (NPI) and yield ramp-up through structured problem-solving
• Document process flows, risk assessments, and engineering reports

Scope of the Job:

• Directly impacts production readiness, yield, and reliability of high-value 2.5D packages
• Supports NPI for advanced semiconductor customers (e.g., AI, HPC, and memory applications)
• Influences supplier qualification and capital decisions related to 2.5D tooling and materials
• Contributes to revenue generation through early ramp-up and stable process delivery

Required Experience and Qualifications:

• Bachelor’s degree or higher in Engineering (Materials, Electronics, Chemical, Mechanical, or related field)
• 3+ years of hands-on experience in semiconductor packaging process development (Die Prep, Chip Attach, or Mold)
• Proficient in DOE, FMEA, statistical process control, and failure analysis
• Familiar with process and reliability evaluation tools (e.g., XRF, shear test, SAM)
• Skilled in documentation and cross-functional communication
• Experience in OSAT, Fab, or advanced packaging (e.g., 2.5D/3D, HBM, interposer) (Preferred)