Patent ID: 8773530
Filing Date: 2014-07-08
Classification: G06K,G16Z,H01L,H04N

Abstract:
1. An alignment method for a pick-and-place handler device, comprising: (a) locating a head of the pick-and-place device using an up-looking camera; (b) locating a test device using the up-looking camera, the test device being picked up by the pick-and-place device from a pocket location on a tray having the test device; and (c) determining offset error by comparing the location of the head with the location of the test device; (d) repeating (a)-(c) for any other additional test devices on the tray; (e) using the offset errors and each pocket location of each device to map positions on the tray; and (f) generating an offset map for alignment correction during operation of the pick-and-place handler device.