LED measurements in the production lineBack to Technical Articles
Fachartikel von Dr. Günther Leschhorn
In the LED manufacturing process, electrical, optical and thermal measurements are performed directly in the production line. The LEDs are thereby sorted into quality classes in a process referred to as "binning" to separate the defective from highquality production. Each bin contains LEDs with the same electro-optical properties that can be precisely specified despite the strong fluctuations within a production batch. Furthermore, the results of inline tests are used to adjust the process during manufacturing to enhance the production yield. This chapter outlines important aspects of optical measurement in a production environment.