Mechanical Design Engineer - Precision Opto‑Mechanical Systems

Company Overview
KLA is a global leader in diversified electronics for the semiconductor manufacturing ecosystem. Virtually every electronic device in the world is produced using our technologies. No laptop, smartphone, wearable device, voice-controlled gadget, flexible screen, VR device or smart car would have made it into your hands without us. KLA invents systems and solutions for the manufacturing of wafers and reticles, integrated circuits, packaging, printed circuit boards and flat panel displays.

The innovative ideas and devices that are advancing humanity all begin with inspiration, research and development. KLA focuses more than average on innovation and we invest 15% of sales back into R&D. Our expert teams of physicists, engineers, data scientists and problem-solvers work together with the world's leading technology providers to accelerate the delivery of tomorrow's electronic devices. Life here is exciting and our teams thrive on tackling really hard problems.

There is never a dull moment with us.

Group/Division
With over 40 years of semiconductor process control experience, chip makers around the globe rely on KLA to ensure that their fabs ramp next-generation devices to volume production quickly and cost-effectively. Enabling the movement towards advanced chip design, KLA's Global Products Group (GPG), which is responsible for creating all of KLA's metrology and inspection products, is looking for the best and the brightest research scientist, software engineers, application development engineers, and senior product technology process engineers.

The RAPID division is the world leading provider of reticle inspection solutions for the semiconductor industry. The company provides inspection solutions to both the mask shops and the semiconductor fabs to ensure that lithography yields are consistently high thus enabling cost-effective manufacturing.

Job Description/Preferred Qualifications

Key Responsibilities

We are seeking a Mechanical Design Engineer to support development, integration, and alignment of EUV source opto-mechanical subsystems. This role focuses on precision mechanical design and alignment of EUV optics, vacuum chambers, and Laser Beam Delivery hardware in a highly constrained, ultra-clean, and high-stability environment.
The ideal candidate will work closely with optics, laser, plasma, vacuum, controls, and system integration teams to enable robust alignment strategies and deliver high-performance source hardware from concept through test and deployment.

Mechanical Design & Opto-Mechanical Support

• Design and detail precision mechanical components and assemblies supporting EUV source optics, opto-mechanical mounts, and alignment hardware.
• Develop designs compatible with ultra-high vacuum (UHV), thermal stability, contamination control, and high-power laser environments.
• Support mechanical interfaces between EUV optics, vacuum chambers, and source subsystems.

Alignment & Integration

• Support EUV optics alignment, including definition of datums, shimming strategies, adjustability ranges, and tolerance stack-ups.
• Contribute to vacuum chamber alignment concepts and procedures to ensure optical and mechanical reference consistency.
• Support Laser Beam Delivery Unit alignment, including opto-mechanical mounts, beam path stability, and serviceability considerations.
• Participate in system-level integration, alignment builds, and troubleshooting during lab and tool bring-up.

Analysis & Documentation

• Perform tolerance analysis, basic structural and thermal assessments, and alignment sensitivity studies.
• Create and maintain detailed CAD models, drawings, BOMs, and engineering documentation.
• Support design reviews, risk assessments, and failure analysis related to alignment stability and mechanical performance.

Cross-Functional Collaboration

• Work closely with optical, laser, plasma physics, vacuum, controls, and manufacturing engineers.
• Support transition from R&D prototypes to more robust, manufacturable designs.

Preferred Qualifications

• Experience with vacuum and laser systems, or semiconductor capital equipment.
• Familiarity with optical alignment methods, metrology tools, and reference frame…