Photolithography Process Engineer - Sherman, TX, United States
Originally posted 6 July 2026 by the employer. Relisted by the employer on 15 September 2026.
Develop, optimize, and support photolithography processes for InP wafer fabrication using i-line, DUV, and electron beam lithography systems.
About the role
This role is responsible for developing, optimizing, and supporting photolithography processes used to manufacture InP wafer-based devices. Technical focus includes i-line, DUV, electron beam lithography, contact aligners, and coat/develop systems.
What you'll do
- Develop, optimize, and maintain photolithography processes and production recipes for InP wafer fabrication. - Support production using i-line, DUV, electron beam lithography, contact aligners, and coat/develop systems. - Troubleshoot process issues, identify root causes, and execute experiments to improve yield, lithography performance, and process capability. - Monitor and optimize critical metrics, including CD, overlay performance, and tool-specific process parameters using SPC and fault detection. - Partner with cross-functional teams to integrate lithography with etch, deposition, and other manufacturing processes. - Support equipment qualifications, process transfers, new product introductions, and develop process documentation and specifications.
What you'll need
- Bachelor's degree in Engineering, Materials Science, Physics, or a related technical field. - At least 5 years of semiconductor photolithography process engineering experience. - Experience processing GaAs and/or InP wafers in a manufacturing environment. - Hands-on experience as a process owner or equipment owner for i-line, DUV, contact aligner, or electron beam lithography systems. - Understanding of photolithography fundamentals, including resist processing, focus and exposure optimization, alignment strategies, and process window development. - Experience using CD and overlay metrology, along with familiarity with DOE, SPC, and process capability analysis.
Skills: photolithography processes, GaAs, InP wafer fabrication, i-line, DUV, electron beam lithography, CD, overlay performance, SPC
This role has been open 107 days — well above the 65-day median for Process Engineering roles.
Process Engineering · Lithography Systems
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Open roles in category
47
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Median days open
65 d
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Median salary
—
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See the full market breakdown ▾Category comparison, skills in demand, and who else is hiring
| Metric | Coherent Corp | All employers we track in this specialty (47 roles · 13 employers) |
|---|---|---|
| Open roles in this specialty | 2 | 47 |
| Open roles in the wider Process, Fab & Equipment family | 155 | 10066 · 107 employers |
| Median days open | 72 d | 65 d (+7 d vs this employer) |
| Median salary (USD postings) | — | — |
Skills observed across this category: photolithography processes, GaAs, InP wafer fabrication, i-line, DUV, electron beam lithography, CD, overlay performance, SPC
Who's hiring in this category
- Micron Technology · 26 open roles · median 78 d
- GlobalFoundries · 5 open roles · median 43 d
- Coherent Corp (this employer) · 2 open roles · median 71 d
- SkyWater Technology · 2 open roles · median 58 d
- Skyworks · 2 open roles · median 167 d
- STMicroelectronics · 2 open roles · median 42 d
How we counted: 47 open Process Engineering (Lithography Systems) roles from 13 employers tracked in the SemiconductorJobs index, counted 21 Oct 2026. Specialty figures count only roles carrying this exact specialty label, so an employer's related work in neighbouring specialties is not included there — it is counted in the wider Process, Fab & Equipment family row. Figures refresh nightly.