Patent ID: 7429503

Claim:
A method of manufacturing a well pick-up structure of a non-volatile memory, comprising: providing a substrate having a first conductive type well therein; forming a plurality of device isolation structures in the substrate; forming a plurality of dummy memory columns on the substrate, wherein each of the dummy memory columns comprises a second conductive type source region and a second conductive type drain region; forming a first interlayer insulating layer over the substrate; forming an opening in the first interlayer insulating layer, wherein the opening exposes the second conductive type drain regions and one of the plurality of device isolation structures between each pair of second conductive type drain regions of the dummy memory columns; removing a portion of the device isolation structure exposed by the opening; forming a first conductive type well extension doped region in the substrate exposed by the opening; forming a well pick-up conductive layer in the opening, wherein the well pick-up conductive layer is electrically connected to the first conductive type well through the first conductive type well extension doped region; and forming a plurality of dummy bit lines over the substrate, wherein the dummy bit lines are electrically connected to the well pick-up conductive layer.