Patent ID: 7727800
Filing Date: 2010-06-01
Classification: H01L,Y10T

Abstract:
1. Method for bonding a die comprising the steps of: viewing a die bonding site with an optical assembly for determining an orientation of the die bonding site; picking up a die from a supply of semiconductor dice with a pick-up tool attached to a bond head, wherein the bond head includes a cavity extending therethrough; positioning the bond head such that the die is held by the pick-up tool between the optical assembly and the die bonding site; viewing the die with the optical assembly through the cavity by aligning the cavity with the optical assembly for determining an orientation of the die while the die is between the optical assembly and the die bonding site; aligning the orientation of the die with the orientation of the die bonding site; and thereafter bonding the die at the die bonding site, the optical assembly being maintained in a stationary position above the die bonding site, during a time period between the step of viewing the die bonding site and the step of viewing the die, in order to maintain high placement accuracy.