Process Engineer - Diffusion

Company: Jireh Semiconductor
Location: Hillsboro
Posted on: February 15, 2026

Job Description:

Job Description Job Description Jireh Semiconductor in Hillsboro, OR is seeking a Diffusion Process Engineer to join our team. The Diffusion Process Engineer will work closely with Equipment Engineering to develop and sustain oxidation, anneal and LPCVD processes on our BTI and KSEC furnaces, along with cleaning processes on our DNS and MEI wet benches. Additionally, the Diffusion process engineer will work with engineers from other modules and our quality teams to identify and address defect and yield issues in our high-volume manufacturing fab. Depending on experience, the engineer will be expected to assume primary ownership of at least one module and be qualified as a primary back-up for at least one additional module. Duties & Responsibilities Support existing furnace and wet clean processes in the 200mm fab. Develop and optimize new processes and process controls for lower cost, higher productivity and enabling technology. Implementing and refining SPC and tool monitors to reduce process variation and prevent out of control events Perform/analyze statistically designed experiments and write reports and process change notifications. Disposition discrepant material, including troubleshooting/diagnosis of root cause and implementation of preventative actions. Write specs for tools, processes and operations. Cross training in additional modules to provide back-up coverage as needed. Experience/Education Ideal candidates for this position would possess the following attributes BS, Masters or Ph.D. degree in physics, electrical engineering, chemical engineering, material science, or other related discipline. 2 years of experience desired. Hands on experience with furnaces and/or wet benches is preferred. Introductory understanding of device physics. Experience with power MOSFET/Trench MOSFET a plus. Experience with SPC and automated data collection/analysis. Strong written and verbal communication skills. Demonstrated ability to work with people one on one and in a team environment. Demonstrated problem solving skills. Experience with MS Office. Minitab/JMP or other software skills a plus. About Jireh Semiconductor: 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. Job Posted by ApplicantPro

Keywords: Jireh Semiconductor, Portland , Process Engineer - Diffusion, Engineering , Hillsboro, Oregon