Methods and apparatus for wire bonding with wire length adjustment in an integrated circuit
View Patent ↗An integrated circuit is wire bonded in a manner such that there is consistent RF performance from integrated circuit package to integrated circuit package. Bond distances within the integrated circuit are measured, each corresponding to a wire bond to be formed. An area under a hypothetical wire bond profile is calculated as a function of the bond distances, a baseline wire length, and a baseline loop height. A wire is bonded across a given one of the bond distances to form a given one of the wire bonds. A wire bond profile for the given wire bond is provided having an area thereunder that is substantially equal to the calculated area.
1. An integrated circuit comprising:
an integrated circuit package;
a plurality of circuit elements disposed within the integrated circuit package; and
a plurality of wire bonds; whereby the plurality of wire bonds are formed by the steps of: (i) measuring a plurality of bond distances within the integrated circuit, each bond distance corresponding to one of the plurality of wire bonds to be formed; (ii) calculating an area under a hypothetical wire bond profile as a function of the plurality of bond distances, a baseline wire length, and a baseline loop height; and (iii) bonding a wire across a given one of the plurality of bond distances to form a given one of the plurality of wire bonds; the bonding step being configured to provide a wire bond profile for the given wire bond having an area thereunder that is substantially equal to the calculated area in step (ii).
2. The integrated circuit of claim 1 , wherein the integrated circuit comprises a radio frequency (RF) integrated circuit.
3. The integrated circuit of claim 1 , wherein the integrated circuit comprises a plurality of dies.
4. The integrated circuit of claim 3 , wherein the integrated circuit comprises a plurality of capacitors, one or more of the dies being disposed between a corresponding pair of the capacitors.