Jireh Semiconductor
  • Hillsboro, OR, USA
  • Full Time

Employee Stock Purchase Plan (ESPP) Two medical plans (Cigna or Kaiser Permanente) Dental ($2000 yearly maximum) Vision, Paid Life Insurance & Long Term Disability, Short Term Disability, 220+ hours of paid vacation holiday sick per year, And more!

POSITION SUMMARY The Senior Process Engineer (Diffusion) will work closely with other engineering and manufacturing functions to ensure robust manufacturing processes are established and maintained. This position will request process engineering support for mass production fab including process problem-solving, yield improvement, process monitoring, cost reduction. Also support R&D activities, new process development. Good experience, team work and leadership are needed.


As part of the factory's process engineering team, responsibilities in this role will include:

  • Supporting and developing Diffusion, LPCVD, Wet-clean processes in the 200mm fab.
  • Optimizing and developing new processes and process controls for lower cost, higher productivity and enabling new products.
  • Implementing and refining SPC controls to reduce process variation without personnel intervention.
  • Performing statistically designed experiments, analyzing, writing report, qualifying process changes.
  • Disposition of discrepant material, troubleshoot process drift or human error, diagnose and implement preventative actions in a cost effective manner.
  • Maintain documentation necessary for proper operation of the equipment.
  • Writing specs of processes and operations, qualification plans, weekly updates, documentation of scrap and rework.
  • Improving the performance of the area using Lean manufacturing techniques.

PHYSICAL DEMANDS / WORK ENVIRONMENT Regularly required to sit or stand and move around the facility and in class 100 clean room. The ability to face technical challenge and high pressure in mass production line.


Ideal candidates for this position would possess the following attributes:

  • BS, Masters or Ph.D. degree in physics, chemical engineering, material science, or other related discipline.
  • 5+ years in Diffusion or LPCVD furnace experience required.
  • Strong background in statistics, including SPC, required.




  • Must have strong written and verbal communication skills
  • Demonstrated strong ownership and passion for success
  • Demonstrated ability to work with people one on one and in a team environment
  • Demonstrated model based problem solving skills in work area
  • Experience with MS Word, Excel, Power-point, RS1, Minitab; other computer skills a plus


COMPANY INFORMATION: Alpha and Omega Semiconductor (AOS) is committed to excellence in design, manufacturing, and responsiveness to our customers through the continued development of new technologies, products and innovative solutions. We bring to the market devices designed to benefit our customers by meeting their product specific needs. Our mission is to bring value to our customers, shareholders and employees.

AOS differentiates itself by integrating its Discrete and IC semiconductor process technology, product design, and advanced packaging know-how to develop high performance power management solutions. AOS's portfolio of products targets high-volume applications, including but not limited to portable computers, flat panel TVs, LED lighting, smart phones, battery packs, consumer and industrial motor controls and power supplies for TVs, computers, servers and telecommunications equipment.

Jireh Semiconductor, Inc., a wholly owned subsidiary of Alpha and Omega Semiconductor Ltd., is the in-house wafer fab for AOS and is located in Hillsboro, Oregon.

EEO Statement:

Jireh Semiconductor prohibits discrimination based on race, color, religion, gender, national origin, age, disability, veteran status, marital status, pregnancy, gender expression or identity, sexual orientation or any other legally protected status.


Jireh Semiconductor
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