3D Coplanarity testing is a process by which the device is subject to a test using complex cameras that will test the leads on the device in 3 different planes, the X, Y, and Z plane. What we are doing is trying to prove to our client we have not degraded the part in any way, shape, or form, by carrying out the programming process. We build these checkers into every machine that we make, and particularly in the automotive industry it's an absolute requirement that you have to 3D check the device after it has been programmed. The device is usually presented either in tray or in tape, we automatically pick the device out, we program it, we bring it back and on the way back, it basically gets checked in all of the three planes.
AOI basically means Automatic Optical Inspection. That is a process that's carried out after the devices have been placed back in tape, after the cover tape has been sealed on the top. The AOI camera then looks at the orientation of the device to make sure that they're all placed back in the correct orientation.