Patent ID: 9209059
Filing Date: 2015-12-08
Classification: H01L,H05K

Abstract:
1. A method for transferring semiconductor dice from a host substrate to a target substrate, comprising the steps of: electrostatically charging regions of a selected one of a transfer stamp or a target substrate; transferring semiconductor dice from a host substrate to said electrostatically charged regions of the selected one of the transfer stamp or target substrate by the application of the electrostatic force of the charged regions to the semiconductor dice when the host substrate is positioned adjacent to the selected one of the transfer stamp or target substrate; and releasing the semiconductor dice onto the target substrate from the transfer stamp, when the selected one is the transfer stamp, by at least removing the electrostatic charge of the electrostatically charged regions or providing an adhesive force between the semiconductor dice and the target substrate that is greater than the electrostatic force between the semiconductor dice and the electrostatically charged regions, wherein electrostatically charging regions of the selected one of the transfer stamp or the target substrate comprises (i) bulk electrostatic charging the transfer stamp or the target substrate and (ii) thereafter, erasing charge therefrom by exposing the selected one of the transfer stamp or the target substrate to optical radiation through an optical mask with opaque portions overlying and shielding the electrostatically charged regions from having their charge dissipated by the optical radiation.