Patent ID: 6214742
Filing Date: 2001-04-10
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, wherein the method comprises:forming metal structures on a first layer of interlayer dielectric, wherein the metal structures have a layer of TiN on a surface of the metal structures;forming a second layer of interlayer dielectric on and around the metal structures;forming a layer of photoresist on a surface of the second layer of interlayer dielectric;patterning and developing the layer of photoresist, whereby selected portions of the surface of the second layer of interlayer dielectric are exposed;etching the exposed portions of the second layer of interlayer dielectric, whereby a surface of the layer of TiN is exposed; andsimultaneously etching the exposed layer of TiN down to the surface of the metal structures and the remaining portions of the layer of photoresist using a CF.sub.4 /O.sub.2 gas chemistry at an elevated temperature.