Automotive electronics ECU unit underfill: thermal grease case study

Background

An equipment integrator / manufacturer in Automotive electronics needed to underfill on a ECU unit using thermal grease.

Process challenge

Particle fillers settling and clogging after long idle periods.

Solution

We recommended Pneumatic Valve + Glue Supply System, with using a servo dispensing module with a programmable speed profile to hold a constant extrusion rate.

Result

Potting void defects reduced from 4% to below 1%.
Shot volume 0.1 mL with deviation within ±3%.
Cycle time 0.6 s per dot with no stringing or dripping during continuous running.

Project facts

Industry: Automotive electronics
Workpiece: ECU unit
Fluid: thermal grease
Process: underfill
Recommended lines: Pneumatic Valve, Glue Supply System