Development of conformal phosphor coating technique for light-emitting diodes using image-processing-based maskless lithography

- A conformal, chip-level phosphor coating technique using IP-ML was developed.
- Conformal phosphor coating was performed on an LED array on a blue tape.
- IP-ML make a chip-level conformal phosphor coating with contact openings.
- The fabricated white LEDs provided a uniform color distribution.
- Color binning can be carried out prior to the packaging process.