Senior Thermal Simulation & Modelling Engineer

Plessey; Plymouth; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Pension scheme

Private medical & dental insurance

28 days’ holiday + bank holidays

Free onsite meals

Onsite gym

Relocation support

Visa support available

Job summary

Plessey in Plymouth, UK invites applications for Senior Thermal Simulation & Modelling Engineer in our R&D team. You will own the thermal behavior of microLED-on-CMOS devices using COMSOL Multiphysics, shaping device design and manufacturing choices.

You’ll build full-stack thermal models, analyze heat flow, predict hotspots, and feed results into layout and co-simulation. Collaboration across packaging and optical design will be common, with opportunities to extend into related R&D topics.

Qualifications

• Hands-on thermal simulation with COMSOL Multiphysics.
• Strong heat-transfer fundamentals: conduction, interface resistance, transient behaviour.
• Experience with semiconductor devices and CMOS circuits.
• Proven ability to validate models with experimental data.
• Clear communication of technical results.

Responsibilities

• Build COMSOL thermal models of the full stack: microLED, bond, CMOS backplane and package.
• Model pixel self-heating, bond thermal resistance and hot spots, and their impact on efficiency, wavelength and lifetime.
• Simulate CMOS power dissipation and feed thermal limits into layout and electro-thermal co-simulation.
• Run parametric studies to guide pixel pitch, drive scheme, bonding and materials.
• Simulate etch processes and microlens designs to support device and optical design.
• Validate models against measured data and turn results into clear design rules.

Skills

Heat transfer fundamentals

Communication of technical results

Semiconductor devices & CMOS circuits

Model validation with experimentalData

Education

Physics or Electronic Engineering degree

Tools

COMSOL Multiphysics

Job description

Senior Thermal Simulation & Modelling Engineer

Department: R&D

Employment Type: Full Time

Location: Plymouth

Description

Join our photonics team and work at the forefront of microLED and optical interconnect technology. As our Thermal Simulation & Modelling Engineer, you will own the thermal behaviour of our microLED-on-CMOS devices in COMSOL Multiphysics.

You will model heat flow from the microLED, through the bond, into the CMOS backplane and package. Your results will directly shape device design, CMOS layout and process choices. There will be an opportunity to also be part of other R&D activities depending on your background and interests such as simulating etch processes and microlenses & Packaging.

Key Responsibilities

• Build COMSOL thermal models of the full stack: microLED, bond, CMOS backplane and package.
• Model pixel self-heating, bond thermal resistance and hot spots, and their impact on efficiency, wavelength and lifetime.
• Simulate CMOS power dissipation and feed thermal limits into layout and electro-thermal co-simulation.
• Run parametric studies to guide pixel pitch, drive scheme, bonding and materials.
• Simulate etch processes and microlens designs to support device and optical design.
• Validate models against measured data and turn results into clear design rules.

Skills, Knowledge and Expertise

• Degree in Physics or Electronic Engineering. A PhD or MSc is an advantage.
• Proven hands-on thermal simulation in COMSOL Multiphysics.
• Strong heat-transfer fundamentals: conduction, interface resistance and transient behaviour.
• Expertise within semiconductor devices and CMOS circuits.
• Track record of validating models against experimental data.
• Clear communication of technical results.

Advantage

• Experience with LEDs, microLEDs or GaN optoelectronic devices.
• Photonic packaging experience, such as optical interconnect, to support wider team activities.
• VCSEL expertise.

Benefits

• Pension scheme
• Private medical & dental insurance
• 28 days’ holiday + bank holidays
• Free onsite meals
• Onsite gym
• Relocation support
• Visa support available