When engineers search for custom UV LED modules, two formats dominate the conversation: POB (Package on Board) and COB (Chip on Board).
Both offer high-density UV output, but they serve different engineering priorities.
POB Advantages
POB uses packaged LEDs mounted onto a board. This provides:
- Easier replacement and servicing
- Mature packaging reliability
- Better binning consistency
- Faster assembly scaling
- Flexible multi-wavelength combinations
POB is commonly preferred for curing systems, modular water treatment, inspection systems, and medium/high-volume OEM equipment.
COB Advantages
COB mounts bare chips directly to substrate.
Benefits include:
- Higher packing density
- Lower optical loss in some designs
- Compact source area
- Stronger custom optical possibilities
COB is often chosen for high-intensity spot curing, specialized optics, or compact medical devices.
Which One Is Better?
The better question is: Which one fits your system constraints?
Choose POB when you need:
- Serviceability
- Lower risk manufacturing
- Faster scaling
- Flexible board shapes
Choose COB when you need:
- Maximum density
- Minimal emitting area
- Custom lens integration
Many industrial customers begin with POB prototypes, then migrate to COB after volume validation.
The right supplier should be able to support both paths.