Patent ID: 6727184
Filing Date: 2004-04-27
Classification: H01L

Abstract:
A method for coating a thick spin-on-glass layer without cracking problems on a semiconductor structure comprising the steps of:providing a pre-processed semiconductor structure with a plurality of metal lines formed on top; depositing conformally a first layer of silicon oxide insulating said metal lines; coating a first layer of spin-on-glass (SOG) on top of said first layer of silicon oxide; coating a second layer of SOG on top of said first SOG layer; annealing said semiconductor structure; depositing a second layer of silicon oxide on top of said second SOG layer; coating a third layer of SOG on top of said second layer of silicon oxide; coating a fourth layer of SOG on top of said third SOG layer; and etching back said third and fourth layers of SOG to substantially planarize said semiconductor structure.