Patent ID: 7988033
Filing Date: 2011-08-02
Classification: H01L

Abstract:
1. A method of profiling a wire bond between a contact pad on a die, and a conductor on a supporting structure, the die having an active surface that has functional elements, the contact pad being formed at one edge of the active surface, the method comprising the steps of: electrically connecting the contact pad on the die to the conductor on the supporting structure with a wire bond, the wire bond extending in an arc from the contact pad to the conductor; pushing on part of an upper surface of the wire bond using a wire pusher to collapse the arc and plastically deform the wire bond without depositing material on the part of the upper surface; releasing the wire pusher so as to expose the part of the upper surface of the wire bond, whereby plastic deformation only maintains the wire bond in a flatter profile shape; applying a bead of encapsulant over the wire bond after releasing the wire pusher; and, moving a profiling surface away from the functional elements on the active surface to push some of the encapsulant material away from the functional element, such that the functional elements remain exposed while the bead of encapsulant is flattened.