Case studies

How labs use our systems

Selected clients
Veltra Automotive
Lumacore
Northfield University
Kestrel Power Systems
Orbis Semiconductor
Halden Institute of Technology
Client name withheld
Automotive · Tier-1 supplier

Die-attach fatigue in SiC traction modules

StructureScopeSiC MOSFETAQG 324Power cycling
+7 %Rth increase at the die attach, detected at 18,000 cycles
Challenge

A supplier qualifying a sintered-silver 1200 V SiC half-bridge needed to know whether end-of-life failures came from the die attach or from bond wires.

Approach

Modules were power cycled at ΔTj = 100 K with a cumulative structure function recorded every 1,000 cycles, alongside VDS monitoring.

Result

The die-attach plateau shifted by 7 % well before any VDS change, which separated solder fatigue from bond-wire lift-off and shortened the qualification loop by one design iteration.

Lumacore
Lighting · LED manufacturer

Comparing thermal interface materials for COB LEDs

StructureScopeLEDJESD51-51/52TIM
0.42 K/WRth reduction with the selected TIM
Challenge

Four candidate TIMs looked similar on datasheets, and steady-state thermocouple tests could not resolve the difference between them.

Approach

Each TIM was measured on the same chip-on-board package and fixture, and the differential structure function isolated the TIM layer from the package.

Result

The TIM layer resistance ranged from 0.31 to 0.73 K/W between candidates. The team selected the lowest-Rth material and documented the test as an internal standard.

Northfield University
Academic · University research group

Thermal model extraction for GaN-on-Si HEMTs

StructureScopeGaN HEMTJESD51-14Compact models
3peer-reviewed papers using the extracted Cauer models
Challenge

A doctoral project required validated compact thermal models of GaN devices for coupled electro-thermal circuit simulation.

Approach

Transients were captured from 1 µs to 100 s at four baseplate temperatures, and Cauer networks were exported directly into SPICE.

Result

Simulated junction temperatures matched measurements within 2 K across the operating range. The group now runs the system as a shared facility for three departments.

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