There are lots of fabs, but not all specialize in techniques used for imagers (like backside illumination). I worked in LCOS and we had one vendor qualified th

There are lots of fabs, but not all specialize in techniques used for imagers (like backside illumination). I worked in LCOS and we had one vendor qualified that could produce a shinier metal layer -- something most fabs wouldn't care about, but directly affected our brightness & power consumption.