Patent ID: 7051915
Filing Date: 2006-05-30
Classification: B23K,H01L

Abstract:
1. A method of wire bonding including steps of bonding wire to an external electrode and then bonding the wire to a top-surface electrode of a semiconductor device, wherein wire bonding is performed by use of a capillary having a face surface formed at a tip end thereof, the face surface inclining toward a center thereof so as to have a tapered shape, the capillary having a through hole formed therethrough so as to permit wire to be placed therethrough, the through hole having an opening at the center of the face surface, wherein an angle of inclination of the face surface relative to a plane perpendicular to an axis of the capillary and including the opening of the through hole is in a range from 4° to 15°, and a height of the face surface along the axis of the capillary is equal to or greater than a thickness of the wire, and wherein, when seen in a side sectional view including the axis of the capillary, a width of the face surface in a direction perpendicular to the axis of the capillary is greater than a width of the semiconductor device.