Here's an example of a company that provides "Production of epitaxial wafers", it gives me an idea of why this news is good.

http://www.jenoptik.com/en-epitaxy

Production of epitaxial wafers

We focus on layer structures for opto-electronic components which will be the basis for your state-of-the-art devices such as

• Laser diodes: wavelengths of 630 - 1,200 nm­
• Surface emitters (VCSELs and VECSELs)
• Light-emitting diodes (RCLEDs and LEDs)
• Schottky diodes
• Detector structures

Our monitored MOCVD / MOVPE production process with tight quality control ensures consistently high quality from start to finish.