Greetings! I'm Jia-Cheng Chang, or call me Alex.I consider myself as a half scientist, half engineering person.My enthusiasm's at Chemistry and Mechanic Engineering.Master degree about electric chemistry on lithium-air batteries.Also I had experience in designing 2D blue print for etching and depositing equipments using Autocad for two years. Self-learning 3D software at home after work. Experience in GaAs Semi-conductor as etching process engineer for half a year.Right now working as R&D in PTOT, developing new dyes in optical lens for new generation of smart phone cameras.To see detail please view my file below, thank you!