LED measurements in the production line


Fachartikel von Dr. G√ľnther 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.

erschienen in laser+photonics 1/18