Challenge
A single PCBA required three different conformal coatings in separate zones along with underfill, extremely low volume, and stringent reliability requirements for extreme environments
Deep-Sea Conformal Coating
Completed high-reliability low-volume manufacturing with three types of conformal coating and underfill for a Nordic marine robotics client
Ledge Approach
Precision selective coating process combined with proactive validation of alternative material options to reduce material risk and shorten validation cycles while maintaining reliability
Result
Stable continued delivery with deeper customer trust
Completed high-reliability low-volume manufacturing with three types of conformal coating and underfill for a Nordic marine robotics client
01
Project Background
The product is used in deep-sea operations where production volume is low but the cost of field failure is high; The task was not only PCBA manufacturing; it required material selection, process control, inspection records, and long-term engineering collaboration
- Application scenario: deep-sea robotics and marine engineering equipment
- Low production volume with high reliability and traceability requirements
- The customer needed continuous material validation support, not only build-to-print execution
02
Key Challenge
A single PCBA required multiple protection zones, each with different coating material requirements, plus underfill on selected components; The process window, material compatibility, and inspection record discipline all had to be controlled
- Three conformal coatings had to be applied in separate zones without cross-contamination
- Underfill needed to support pressure, vibration, and thermal reliability
- Imported material lead time and cost created risk, requiring validation of local alternatives
03
Ledge Approach
Ledge defined a selective coating plan based on the customer's protection requirements and supported material validation throughout manufacturing; Coating parameters, material batches, underfill locations, and inspection records were kept in a traceable process
- Defined coating boundaries, materials, and process parameters by zone
- Supported validation of imported and local alternative materials to reduce future supply risk
- Recorded coating, underfill, and inspection data at batch level for customer review
04
Result and Value
The project has continued with stable delivery and deeper customer trust; It shows that Ledge can act as a process and material validation partner for extreme-environment, low-volume programs
- Reduced process failure risk for deep-sea electronic assemblies
- Created additional material options for long-term supply continuity
- Turned a complex process into a documented, repeatable production routine
05
Capabilities Proven
- Complex conformal coating by zone
- Underfill and high-reliability process control
- High-mix low-volume manufacturing
- Material validation and substitution
- Batch-level traceability and inspection records
- High-cooperation engineering collaboration