Sk3R,,,II-VI also purchased wavetek, the company we get our wafers from, right? Wrong,,, it is Epiworks in the Chicago IL, that manufacturers the POET wafers with the epitaxial layers using a MOCVD (Metal Oxide Chemical vapor deposition) process, not Wavetek. Wavetek in Taiwan writes the POET products to theses wafers. DL Singapore Lab does the inspection and performance testing of the POET products written to the wafer(s). If not satisfactory, must rinse and repeat. FWIW,