Patent ID: 6524908
Filing Date: 2003-02-25
Classification: C23C,H01L

Abstract:
A method for forming a refractory metal-silicon-nitrogen capacitor in a semiconductor structure comprising the steps of:positioning a preprocessed semiconductor substrate in a sputtering chamber; flowing Ar gas into said sputtering chamber; sputter depositing a first refractory metal-silicon nitrogen layer on said substrate; flowing N2 gas into said sputtering chamber such that concentration of said N2 gas in said chamber is at least 35% by adjusting the flow or partial pressure of N2; sputter depositing a second refractory metal-silicon-nitrogen layer on top of said first refractory metal-silicon nitrogen layer; stopping said N2 gas flow into said sputter chamber; sputter depositing a third refractory metal-silicon-nitrogen layer on top of said second refractory metal-silicon-nitrogen layer; and photolithographically forming said first, second and third refractory metal-silicon-nitrogen layers into a capacitor.