Patent ID: 6350646
Filing Date: 2002-02-26
Classification: H01L

Abstract:
A method for forming a structure in an embedded dynamic random access memory, comprising:providing a substrate having a logic region and a memory region; forming gate structures on said logic region and said memory region; forming a first inter-poly dielectric layer on surfaces of said gate structures and said substrate; forming an opening, over said memory region, through said first inter-poly dielectric layer to top surface of said substrate; forming a conductor on said first inter-poly dielectric layer and to fill said opening; forming a bit line using photolithography and etching said conductor; forming a second inter-poly dielectric layer on said first inter-poly dielectric layer and said bit line; forming a node contact opening through said first inter-poly dielectric layer and said second inter-poly dielectric layer to top surface of said substrate; and forming a silicon nitride layer on inside wall of said node contact opening by rapid thermal chemical vapor deposition (RTCVD).