Process Engineer

Filtronic PLC is a world leader in the design and manufacture of customised microwave and millimetre wave electronics. Our products are used within satellite, defence, terrestrial telecommunications and other related applications. Our investment in high calibre staff, leading edge technology and a world class manufacturing facility underpin our growth strategy and our aim to be a world class supplier of high frequency products and solutions.

As we scale our advanced packaging and assembly capability at Net Park, we are expanding our Process Engineering team to support the transition of new technologies from development into stable, high-yield production.

The Process Engineer is responsible for the evaluation, development, optimisation and control of advanced semiconductor and RF module assembly processes. The role focuses particularly on die attach technologies (silver epoxy, silver sinter, and eutectic attach) and gold wire/ribbon bonding across a range of substrate and device materials.

In addition, the Process Engineer will work closely with the RF Engineering team to identify, evaluate and mature manufacturing technologies that support the company’s long-term technology roadmap, ensuring future products are scalable, manufacturable and reliable.

The successful candidate will drive process robustness, yield improvement, manufacturability and cost efficiency while supporting new product introduction (NPI) and ongoing production.

• Analytical and methodical approach
• Strong cross-functional collaboration skills
• Ability to translate technical roadmap requirements into manufacturable solutions
• Comfortable working between development engineering and production operations
• Strong mechanical reasoning and problem-solving capability
• Proactive and hands-on within a manufacturing environment
• Able to operate in a fast-paced scaling organisation

• Partner with RF Engineering to identify suitable materials, processes and assembly technologies aligned to future product requirements.
• Evaluate emerging die attach and interconnect technologies to support higher power density, higher frequencies and improved thermal performance.
• Provide early manufacturability input into technology roadmap planning.
• Assess scalability, automation potential and cost implications of proposed technologies.
• Lead feasibility trials and proof-of-concept builds for next-generation processes.
• Support make/buy decisions and supplier technology assessment

• Evaluate and optimise die attach methods including, but not limited to:
• Silver epoxy
• Silver sinter
• Eutectic attach (e.g., AuSn)
• Define process windows (temperature, pressure, time, atmosphere).
• Develop qualification plans and validation methodologies.
• Conduct thermal, mechanical and reliability assessments.
• Characterise voiding, bond line thickness, shear strength and thermal resistance.
• Support material selection and supplier evaluation.

• Develop and optimise gold wire bonding processes (ball and wedge bonding).
• Establish bonding parameters for different metallisation and substrate types.
• Perform pull and shear testing and reliability validation.
• Address intermetallic formation, pad damage and bond integrity challenges.
• Support transition to fine-pitch and high-frequency capable assemblies

• Define, document and control new and existing manufacturing processes.
• Develop process flow documentation, SOPs and control plans.
• Implement SPC, Cp/Cpk analysis and yield monitoring.
• Lead root cause investigations using structured methodologies (8D, DMAIC, FMEA).
• Drive continuous improvement initiatives for yield, cycle time and cost reduction.

• Drive DFM/DFA reviews during product development.
• Develop prototype/pilot builds and process validation plans.
• Work closely with RF, mechanical, quality and operations teams to ensure manufacturability.
• Define tooling, fixturing and automation requirements.

• Degree in Engineering, Materials Science, Physics or related discipline.
• Experience in semiconductor or RF module assembly…