The good ones into the pot


German article by Dr. Günther Leschhorn

In the LED manufacturing process electrical, optical and thermal measurements are performed on the production line itself, to sort the LEDs in quality groups and to separate defective from high-grade production in a procedure known as binning. The bins contain LEDs with the same electro-optical properties, although there may be strong fluctuations within a production batch. In addition, the results of inline tests serve to adjust the manufacturing process during production, and thus to increase production yield.

published in smart engineering 5/18