01CLARIFY
Understand
When the behaviour is unclear
Device and system interpretation · Measurement-to-physics analysis · Parasitics and package/PCB interactions · Root-cause hypotheses · Failure-analysis strategy
Independent R&D engineering
From a difficult technical question to an actionable path.
Semiconductors, electronics, modelling and practical experimentation — to understand what matters, reduce uncertainty and create a technically credible next step.
Direct expertise where proven. Disciplined investigation where the topic is adjacent. External specialists where the problem requires them.
R&D services menu
Choose an entry point
Start with the obstacle you face. The assignment can remain a rapid independent view or become a defined R&D work package.
02EVIDENCE
Model
When decisions need evidence
SPICE and behavioural models · MATLAB/Simulink analysis · Finite-element and electro-thermal reasoning · Sensitivity studies · Model-versus-measurement correlation
03MAKE
Design
When an idea needs a circuit
Power-converter and driver architecture · GaN-based concepts · PCB schematic/layout support · Sensor and interface circuits · Design review · Feasibility prototypes
04DISCOVER
Explore
When the solution is not yet known
Technology scouting · Feasibility investigation · Experimental plan · Component and method selection · Rapid learning in adjacent technical domains
05CONNECT
Bridge
When expertise is distributed
Translate between device, package, PCB and system teams · Connect companies with laboratories, universities, suppliers or packaging specialists · Coordinate an external investigation
06EQUIP
Enable
When R&D needs a flexible, private workspace
Linux virtual environments with Proxmox · GPU passthrough · Local-AI experimentation · Reproducible engineering workflows, automation and proof-of-concept infrastructure
How we can start
A format proportional to the question
A small, well-scoped first step can reveal whether a deeper engagement is useful.
Flash
Hours to 2 daysIndependent technical review, expert discussion or rapid diagnostic.
Memo, annotated review or decision notes
Focused
1–4 weeksModel, feasibility study, simulation task, design review or investigation.
Model, report, prototype or action plan
Extended
1–6 monthsA defined R&D work package, multidisciplinary exploration or development support.
Milestones, technical package and transfer
Embedded
Part-time / recurringFlexible external R&D capacity alongside an internal engineering team.
Ongoing analysis, reviews and decisions
Typical starting questions
What could we look at first?
The measurements do not match the expected device or system behaviour.
We need an independent view before committing to a design direction.
Our specialists are fully occupied, but this medium-term R&D question should not wait.
The answer may exist in a laboratory or specialised supplier, but the investigation needs an owner.
- Technical problem framing: facts, assumptions, unknowns, risks and decision tree
- Simulation or behavioural model with documented assumptions and validity range
- Design review, measurement plan, feasibility demonstrator or external-capability shortlist
- Clear transfer package so internal teams can continue independently
The person behind eXemi
Xavier Baie, PhD
R&D engineer and consultant combining semiconductor physics, materials science, device modelling, power electronics and electronic design. Most useful when the problem is not yet fully framed: connecting physics, measurements, simulation, components, packaging and PCB behaviour.
International research and industrial experience includes UCLouvain, UC Davis, IBM, Thales Alenia Space and Navitas Semiconductor.
PhDSemiconductor physics / SOI MOSFETs
23Scientific publications and conference contributions
500 V / 10 AGaN BLDC driver development
3 kWBidirectional-GaN AC-AC architecture
Technical foundation: semiconductor devices and SOI · GaN power electronics · low-power space converters to multi-kW, kV-class architectures · device/package/PCB parasitics · SPICE · MATLAB/Simulink · CAE/FEA · Altium Designer · Silvaco · laboratory characterisation · materials-science perspective
Documents
A concise view to share
eXemi — where eXternal eXpertise meets semiconductors, through modelling, measurement and simulation.
A practical first conversation
Bring a difficult question, an unexpected result or an idea that deserves a structured technical look.