EI is a leading manufacturer of printed circuit boards with over 30 years of experience. Our state-of-the-art facility is located in Elk Grove Village, IL, USA. Our certifications include AS9100D/ ISO:9001:2015, ITAR registration, RoHS compliance, and UL approval. We have an extensive global partner network that allows us to provide highly complex prototypes and high-volume production at competitive prices with flexible lead times.