We would like to fused the lead 3 with EP. As the “grey” area is the desired
increasing of half etching area. The bottom of the half etching area is desired to be
extend so that the overlap with lead 3 and EP metal could with around 1/3 of the lead
width of lead 3. In that case, the wire bond originally connected to the lead 3 can
bonded on the half etching area if that helps to decrease the risk of WB . The top of the
half etching area is optional depends on if ASE /Vendor feel the symmetrical design
helped LF manufacturing or process. If not, we don’t really need to extend the half
etching on the top side.