Patent ID: 6045666
Filing Date: 2000-04-04
Classification: C23C,H01J,H01L

Abstract:
A method of filling a hole through a dielectric layer in an integrated circuit, comprising the steps of:a first step of sputter depositing in said hole a first metal layer comprising a metallization metal under conditions of a high-density plasma, wherein said high-density plasma is a plasma substantially filling the entire volume it is in and having an average ion density of greater than 10.sup.11 cm.sup.-3 in a principal portion of said high-density plasma; anda second step of sputter depositing over said first metal layer a second metal layer comprising said metallization metal, wherein said second step is performed under conditions of a low-density plasma, wherein said low-density plasma has an average ion density of less than 10.sup.11 cm.sup.-3 in a principal portion of said low-density plasma.