Patent ID: 6399424
Filing Date: 2002-06-04
Classification: H01L

Abstract:
A method of manufacturing a contact structure comprising the steps of:(a) preparing a substrate layer having an electrode to be connected in a surface; (b) forming a first insulating film, a second insulating film, a third insulating film, a fourth insulating film having a higher tolerance to a photoresist removing processing than said third insulating film, and a fifth insulating film having a first through hole on said substrate layer in this order; (c) forming said photoresist on said fourth and fifth insulating films, patterning said photoresist, etching said fourth insulating film by using said photoresist as a mask, thereby forming, in said fourth insulating film, a second through hole partially exposed to said first through hole; (d) etching said third insulating film by using said fourth insulating film as a mask, thereby forming, in said third insulating film, a third through hole having the same shape as that of said second through hole; (e) etching said fourth insulating film by using said fifth insulating film as a mask, thereby forming a fourth through hole having the same shape as that of said first through hole; (f) etching said second insulating film by using said third insulating film as a mask, thereby forming a fifth through hole having the same shape as that of said second through hole; and (g) etching said third insulating film and said first insulating film by using said fourth insulating film and said second insulating film as masks, thereby forming sixth and seventh through holes having the same shapes as those of said first through hole and said second through hole to be positioned above said electrode, respectively.