Wire bond interconnection
View Patent ↗A wire bond interconnection between a die pad and a bond finger includes a support pedestal at a bond site of the lead finger, a ball bond on the die pad, and a stitch bond on the support pedestal, in which a width of the lead finger at the bond site is less than a diameter of the support pedestal. Also, a semiconductor package including a die mounted onto and electrically connected by a plurality of wire bonds to a substrate, in which each of the wire bonds includes a wire ball bonded to a pad on the die and stitch bonded to a support pedestal on a bond site on a lead finger, and in which the width of the lead finger at the bond site is less than the diameter of the support pedestal.
1. A semiconductor package including a die mounted onto and electrically connected by a plurality of wire bonds to a substrate, wherein each of the wire bonds includes a wire ball bonded to a pad on the die and stitch bonded to a support pedestal on a bond site on a lead finger, and the width of the bond site is less than the width of the support pedestal.
2. The semiconductor package of claim 1 wherein a width of the lead finger at the bond site is less than the diameter of the support pedestal.
3. The semiconductor package of claim 1 wherein the lead finger bond pitch is less than about 100 μm.
4. The semiconductor package of claim 1 wherein the lead finger bond pitch is less than about 95 μm.
5. The semiconductor package of claim 1 wherein the lead finger bond pitch is less than about 90 μm.
6. The semiconductor package of claim 1 wherein the lead finger bond pitch is in a range from about 80 μm to about 100 μm.
7. The semiconductor package of claim 1 wherein the lead finger bond pitch is about the same as the die pad pitch.
8. The semiconductor package of claim 1 wherein the package substrate comprises a two-tier substrate, each tier including a plurality of lead fingers, the lead fingers of the first tier and the second tier having a staggered arrangement so that the effective lead finger pitch of the two-tier substrate is half the lead finger pitch on each substrate tier.
9. The semiconductor package of claim 8 wherein the lead fingers in each substrate tier have a lead finger bond pitch about twice the die pad pitch, so that the effective lead finger pitch of the two-tier substrate is about the same as the die pad pitch.