Yao Chin Chang

Richtek Technology Corp. engages in the designing, manufacturing, and marketing of power management analog integrated circuits (IC). Its products include switching regulators, linear regulator, Vcore controller, lighting solutions, display solutions, communication solutions, battery management, audio amplifier and switch, motor controller, power management IC, MOSFET driver, personal computer system buck controller, power switch, and operational amplifier. The company was founded on September 18, 1998 and is headquartered in Hsinchu, Taiwan.

Empire Vision Optical Co. Ltd. designs, manufactures, develops, and sells contact lens. It operates in Optical Instruments, Contact Lenses Dry Film, Contact Lenses, Semi Finished Aluminum Products, and Molds segments. The company offers contact lenses for retail users. It also engages in the sale of optical instruments. The company was founded on June 11, 1985 and is headquartered in Hsinchu, Taiwan.