Patent ID: 6472268
Filing Date: 2002-10-29
Classification: H01L

Abstract:
A method for forming a storage node contact comprising the steps of:forming a bit line on a semiconductor substrate having a predetermined lower structure; depositing an inorganic SOG oxide layer on the resultant material and executing a thermal process; depositing a photo resist layer on the inorganic SOG layer and then forming a photo resist pattern in order to intercept a part for forming a storage node contact and open the other part, thereafter etching the inorganic SOG oxide layer; forming an artificial void by removing the inorganic SOG oxide layer filled between the bit lines by a wet etching process; depositing a HDP oxide layer on the resultant material for isolating the storage node in order not to be embedded the void of the inorganic SOG oxide layer; performing a planarization process of the resultant material by a CMP process and thereafter depositing a photo resist layer selectively and executing a masking etching process for forming a storage node contact, thereby forming the storage node contact connected to a plug poly.