Controls Engineer, Multi-Axis Motion Systems

The challenge

The next-generation wafer inspection platform requires sub-10nm positioning accuracy across a 300mm travel range at scan speeds of 200mm/s. Current control algorithms need to close a significant gap to hit this target.

Role overview

Motion control algorithms driving multi-axis stages in semiconductor inspection equipment. Servo loop tuning, feedforward controller design, and trajectory planning that maximizes throughput while maintaining nanometer-level positioning accuracy.

Specializations

Technical requirements

• MS in Controls Engineering, Mechanical Engineering, or Electrical Engineering
• 5+ years designing motion control systems for precision equipment
• Strong background in classical and modern control theory (PID, state-space, H-infinity)
• Experience with real-time motion control platforms (Beckhoff TwinCAT, Delta Tau, or ACS Motion Control)
• Proficiency in MATLAB/Simulink for control system design and analysis
• Understanding of mechanical dynamics, vibration, and structural resonance

Key responsibilities

• Design and tune multi-axis servo control systems for wafer handling and inspection platforms
• Develop feedforward and feedback controllers that achieve sub-10nm positioning accuracy
• Implement trajectory planning algorithms that optimize scan patterns for throughput
• Characterize mechanical stage dynamics and develop compensating control strategies
• Investigate vibration sources and design isolation strategies to mitigate disturbances
• Program motion controllers using EtherCAT and proprietary real-time control architectures

Compensation & Benefits

• Base salary: $185,000 - $220,000
• Annual bonus (8-12%)
• Patent bonus program ($5,000 per filed patent)
• 9/80 compressed work schedule
• On-site fitness center and subsidized meals