Patent ID: 6667234
Filing Date: 2003-12-23
Classification: H01L

Abstract:
A method of fabricating a node contact on a substrate, wherein the substrate comprises a first conductive device and an insulating layer covering the substrate and the first conductive device, the method comprising steps of:forming at least two conductive lines on the insulating layer, wherein the conductive lines are separated by a first distance; forming at least two second conductive devices on the insulating layer, wherein the second conductive devices are separated by a second distance, and wherein one of the conductive lines and one of the second conductive devices are separated by a third distance, and wherein both the first and second distances are greater than the third distance; forming an isolation layer of a thickness on the substrate to cover the insulating layer, the conductive lines and the second conductive devices, wherein the isolation layer comprises a dished area which is located between the second conductive devices; removing a portion of the isolation layer to form a spacer around the second conductive devices, and to deepen the dished area to form an opening exposing the insulating layer; deepening the opening to expose the first conductive device; and filling the opening with a conductive material.