RITEK Corporation manufactures optical discs such as CD-R, CD-RW, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM, HD DVD, Blu-ray Disc and Blu-ray M-Disc, storage cards such as CF (CompactFlash) cards, SD cards and MMC cards (MultiMediaCard), memory stick and consumer electronics. Ritek also produces solar modules and touch panel products such as passive matrix OLED and ITO glass. Ritek has also launched a few products in nano- and biotechnology. The company's English name is a portmanteau of the words “right” and “technology”. Ritek Corporation was established in 1988 with efforts to manufacture Compact discs. In 1990 the company produced the first compact disc in Taiwan. In November 2005 the company had a market share of 20 percent in rewritable DVDs and CD-RWs and was so the biggest disc-manufacturer worldwide. In September 2020 Ritek has 5,900 employees. Locations today Taiwan : Chungli, Hsinchu Mainland China : Yangzhou, Kunshan Vietnam : Ho Chi Minh City South Korea : Cheongwon County The Netherlands : Ridderkerk United States : Los Angeles Trade marks and brand RITEK, RIDATA, TRAXDATA, ARITA, imation (since November 2019) Prehistory and start Yeh Ching-Tai, founder of RITEK, started to manufacture and market vinyl records in 1957. In 1958, he published the album “Green Island Serenade”, performed by Zi Wei, a famous female singer of the time. At that time, the production process was completely manual. Waste gases and toxic chemical solutions were all over the manufacturing environment at the high temperature of . Meanwhile, the materials deteriorated easily and as a result, the yield was low. Quality depended entirely on the experience of manufacturing supervisors and the process cost a lot of time and money. During this period, Yeh Ching-Tai made improvements introducing new technologies and machines from Japan, looking for new materials and developing new manufacturing processes. Eventually the vinyl record industry in Taiwan finally began to produce better products in improved manufacturing environments. Due to the insufficient quantity of recording equipment and facilities in Taiwan at that time, Mr. Yeh Ching-Tai felt it would be necessary to preserve Peking Opera, Nan-Guan and Bei-Guan as educational and cultural heritage. In 1980, he invested a significant amount in the creation of Platinum Studio in 1980, by importing from Switzerland a 24-track recorder. It was the first multitrack recorder in Taiwan. The studio also invited technicians from Japan to give instructions. It was at that juncture that Mr. Yeh Ching-Tai learned that the