Date

Place

[17-2]
16:25 ~ 16:50
Title:[Invited] Flip-Chip White LEDs Fabricated by Model Conformal Coating
Ray-Hua Horng, Hsin-Yi Chiang, and Sin-Liang Ou (Nat'l Chung Hsing Univ., Taiwan)
Abstract: Up to present, the blue LED with the conformal phosphor is widely used to form the white LED due to its higher angular correlated color temperature (CCT) uniformity. Although the pulsed spray coating (PSC) method is a common technique for the fabrication of conformal phosphor on LED chip, there is still room for improvement in the CCT uniformity of this white LED. In our work, the white LEDs were fabricated via the combination of flip-chip device and conformal phosphor layer. To enhance the CCT uniformity of white LEDs, the model conformal coating (MCC) technique has been presented to form the phosphor layer. For the MCC technique, a model with a square hole was designed to place the chip, and the phosphor slurry was injected into the hole. In addition, the white LED with the PSC-prepared phosphor layer was prepared as the contrasted sample.
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