Method of making a copper wire bond package

A method for making a wire bond package comprising the following steps:

• Step 1:
• providing a lead frame array comprising a plurality of lead frame units therein, wherein each lead frame unit comprises a first die pad and a second die pad each having a plurality of tie bars connected to the lead frame array, and a plurality of reinforced bars extending from the first die pad to the second die pad, a bottom of the reinforced bars being coplanar to a bottom of the first and second die pads;
• Step 2:
• mounting a first and a second semiconductor chip onto the first and second die pads, respectively;
• electrically connecting a plurality of electrodes on the first and second semiconductor chips via wire bonding to a plurality of leads along the first and second die pads;
• Step 3:
• encapsulating the lead frame unit, the first and second semiconductor chips and the bond wires with a single body of molding compound, the body of molding compound filling a space above a top surface of the reinforced bars between the first die pad and the second die pad, at least a bottom of the plurality of reinforced bars being exposed through a bottom of the body of molding compound;
• Step 4:
• disconnecting the first and second die pads by removing at least a portion of the reinforced bars from the bottom of the body of molding compound die pad thus electrically isolating the first and second die pads.