RITEK Corporation is a Taiwanese company that manufactures optical discs such as compact discs, DVDs, and Blu-ray, as well as storage cards such as CompactFlash cards, SD cards and MultiMediaCards, flash drives. Ritek also produces solar modules and touch panel products such as passive-matrix OLED and ITO glass. Ritek has also launched some products in nano- and biotechnology. Ritek Corporation was established in 1988 with the goal of manufacturing CDs in Taiwan. In 1990 the company produced the first CD in Taiwan. In November 2005, the company had a market share of 20 percent in rewritable DVDs and CD-RWs and was the biggest disc-manufacturer worldwide. As of 2020, Ritek has 5,900 employees. Wikipedia