30+ days ago - J-00240113-538

Principal Mechanical Engineer

Mechanical engineering

In a nutshell


San Diego - CA, US

Job Category

Mechanical engineering



Introduction to the job

ASML US, LP brings together the most creative minds in science and technology to develop lithography machines that are key to producing faster, cheaper, more energy-efficient microchips. We design, develop, integrate, market and service these advanced machines, which enable our customers - the world’s leading chipmakers - to reduce the size and increase the functionality of their microchips, which in turn leads to smaller, more powerful consumer electronics. Our headquarters are in Veldhoven, the Netherlands, and we have 18 office locations around the United States including main offices in Wilton, CT, Chandler, AZ, San Jose, CA and San Diego, CA.

This position requires access to controlled technology, as defined in the Export Administration Regulations (15 C.F.R. § 730, et seq.). Qualified candidates must be legally authorized to access such controlled technology prior to beginning work. Business demands may require ASM0L to proceed with applicants who are immediately eligible to access controlled technology.”

We are looking for a driven, hands-on and experienced Principal Mechanical Engineer with a strong and diverse background in mechanical design to join our extreme ultraviolet (EUV) Source Research and Development team. This position will be a key contributor in designing mechanical modules, parts and assemblies involving high pressure gas and liquid systems, as well as providing architecture configuration for our EUV light sources.

Leads the development of the Mechanical Design within the EUV droplet generator team within the Source Research and Development team. to enable the existing and future functions according to the program roadmap. Assigned sub-system design project through direct technical advice, schematics/design, approvals, and collaboration with Development Engineering team and external suppliers.

A key ingredient in the EUV generation process is a stable source of molten tin droplets. These droplets provide the fuel for the laser-produced plasma and serve as the heart-beat for synchronizing the EUV source. The challenge is to reliably produce nearly perfect droplets of molten tin tens of thousands of times each second at a speed of 10’s of m/s with position stability that’s a fraction of a droplet diameter. If these dimensions were scaled up to the game of golf, this would be equivalent to scoring a hole-in-one in a hole that’s 25 km away in swirling gas flows and a plasma that’s hotter than the surface of the sun, 10’s of thousands of times per second. The successful candidate will be comfortable designing mechanical modules to operate in this diverse mix of physics, engineering and materials science. The successful candidate will also have a passion for innovation, be driven by curiosity, and have deep technical understanding, in order to excel in a Research environment operating at the fuzzy front end of product development. A key part of our success is the ability to quickly translate ideas for functional hardware, metrology, and test apparatus, into hardware for testing. The successful candidate will use their skills in analysis and design and collaboration to work with scientists and engineers to rapidly convert ideas into breadboard hardware for Research product development.

Role and responsibilities

  • Contributes as Principal Mechanical Engineer in a research environment; engages scientists and engineers in early-phase product development with a focus on designing and building breadboard hardware; maximizes rate of learning via rapid prototyping and testing of component level and breadboard-module-level hardware.
  • Contributes as Mechanical domain expert to apply a broad range of fundamental mechanical engineering knowledge including but not limited to high pressure (kbar) gas and liquid system design and manufacturing techniques.
  • Works closely with cross-functional groups to understand the current product issues, develop integrated solutions and develop next generation systems. Engages engineers, scientists, manufacturing, and upper management to gain alignment and drive the implementation of the Droplet Generator function.
  • Capable of pulling requirements from multiple functions and multiple disciplines to understand and balance their impacts on design constraints.
  • Assists in providing a broad mechanical engineering design background and performs mechanical engineering analysis (stress, fluids, vibrations, thermal), design for control and distribution of inert and hazardous gases, air and water handling for thermal management of equipment and enclosures, large enclosure design, electrical component packaging, mechanical structural mounts and fixtures, design for manufacturability in low volume products, and design for configuration management.
  • Assists in generating module or system concepts to meet product requirements.
  • Assists in performing detailed design and component layout for new or improved subsystems.
  • Performs tolerance analysis at system and subsystem level. Tolerance Stack up Analysis.
  • Performs analytical analysis for thermal and structural components and sub-modules.
  • Assists in a project plan including key deliverables, timeline, and budget.
  • Works with other Engineers and CAD Designers for prototype and pilot detailed design.
  • Supports driving full documentation of design including, BOM, drawings, and procedures.
  • Interacts closely with development engineers, scientists, suppliers, and QA to resolve quality issues.

Education and experience

  • Requires a Bachelor’s Degree in Mechanical, Physics, or Material Science and a minimum of (7) years of relevant experience.
  • Master’s Degree or PhD preferred.
  • Proficient in NX solid modeling (or similar) and Team Center, to lead the detailed design of complex mechanical devices.
  • Requires knowledge/relevant experience in a wide range of thermal and stress analysis, knowledge of materials, materials compatibility, fits and tolerances, design, manufacturing and testing of complex industrial devices and sub-assemblies.
  • Experience in designing, fabrication, and testing of mechanical, electro-mechanical and/or opto-mechanical modules, and related system interfaces for high pressure systems including but not limited to: seal design; mechanical design and analysis; familiarity with regulatory considerations; pressure controllers; and pressure damping.
  • Experience with droplet formation, sprays, common-rail diesel, and/or injectors is a plus.
  • Experience with high pressure hydraulics, mechanical liquid pumps, and/or solid presses is a plus.
  • Experience with water jet cutting, jet breakup, and nozzle design is a plus.
  • Experience with acoustics designs: resonant cavities in the kHz/MHz regime; transfer function design for enhancing/suppressing energy transfer into liquids; piezo-driven system design.
  • A working knowledge of glass physics and experience working with glass is a plus.
  • Experience with root-cause analysis of failure modes, or interpretation of unexpected test results, or puzzling data, to quickly drive to hypothesis bucketing and root-cause understanding
  • Hands on experience in mechanical design and testing complex components and sub-assemblies.
  • Experience in solid modeling; NX and Team center desired.
  • Experience in Finite Element Analysis, NX-Nastran/Ansys desired.
  • Experience with phased new product development process from concept to full release.
  • Hands on experience and knowledge of machining and fabrication techniques highly desirable.
  • Experience with Product Development tasks desired: bills of material, interfacing with vendors, procurement of material for prototyping, change management (ECNs/ECR/ECO).
  • Knowledge/experience in Vacuum Technology preferred.
  • Experience with custom vacuum process preferred.


Working at the cutting edge of tech, you’ll always have new challenges and new problems to solve – and working together is the only way to do that. You won’t work in a silo. Instead, you’ll be part of a creative, dynamic work environment where you’ll collaborate with supportive colleagues. There is always space for creative and unique points of view. You’ll have the flexibility and trust to choose how best to tackle tasks and solve problems.
To thrive in this job, you’ll need the following skills:

  • Excellent English written and verbal communication skills.
  • Proficiency with MS Word, Excel, PowerPoint, and electronic e-mail systems.
  • Leading the design of a complex mechanical assembly, from initial concept through to deployment (including Design Review process), prototyping, resolving issues with functionality and with manufacturability.
  • Guide development of high-level architecture as well as specific techniques to improve the EUV generation process.
  • Ability to translate, statistically analyze data, and effectively report problems through written and/or graphical formats.
  • Excellent customer service skills, with an advanced understanding of customer relationship building.
  • Applies knowledge of Geometric Dimensioning and Tolerancing.

Diversity & Inclusion

ASML is an Equal Opportunity Employer that values and respects the importance of a diverse and inclusive workforce. It is the policy of the company to recruit, hire, train and promote persons in all job titles without regard to race, color, religion, sex, age, national origin, veteran status, disability, sexual orientation, or gender identity. We recognize that diversity and inclusion is a driving force in the success of our company.

Other information


The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

  • While performing the duties of this job, the employee routinely is required to sit; walk; talk; hear; use hands to keyboard, finger, handle, and feel; stoop, kneel, crouch, twist, reach, and stretch.
  • The employee is occasionally required to move around the campus.
  • The employee may occasionally lift and/or move up to 20 pounds.
  • May require travel dependent on business needs.
  • Specific vision abilities required by this job include close vision, color vision, peripheral vision, depth perception, and ability to adjust focus.
  • Can work under deadlines.

EOE AA M/F/Veteran/Disability

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