公开(公告)号：US08835311B2

公开(公告)日：2014-09-16

申请号：US14145434

申请日：2013-12-31

Applicant: Applied Material, Inc.

Inventor： Joshua Collins ,  Murali K. Narasimhan ,  Jingjing Liu ,  Sang-Hyeob Lee ,  Kai Wu ,  Avgerinos V. Gelatos

IPC: H01L21/44 ,  H01L21/768

CPC classification number: H01L21/76876 ,  H01L21/743 ,  H01L21/76814 ,  H01L21/76841 ,  H01L21/76843 ,  H01L21/76861 ,  H01L21/76864 ,  H01L21/76877 ,  H01L23/53266 ,  H01L27/10885 ,  H01L27/10891 ,  H01L2924/0002 ,  H01L2924/00

Abstract: Embodiments of the invention provide an improved process for depositing tungsten-containing materials. In one embodiment, the method for forming a tungsten-containing material on a substrate includes forming an adhesion layer containing titanium nitride on a dielectric layer disposed on a substrate, forming a tungsten nitride intermediate layer on the adhesion layer, wherein the tungsten nitride intermediate layer contains tungsten nitride and carbon. The method further includes forming a tungsten barrier layer (e.g., tungsten or tungsten-carbon material) from the tungsten nitride intermediate layer by thermal decomposition during a thermal annealing process (e.g., temperature from about 700° C. to less than 1,000° C.). Subsequently, the method includes optionally forming a nucleation layer on the tungsten barrier layer, optionally exposing the tungsten barrier layer and/or the nucleation layer to a reducing agent during soak processes, and forming a tungsten bulk layer on or over the tungsten barrier layer and/or the nucleation layer.

Abstract translation: 本发明的实施方案提供了一种用于沉积含钨材料的改进方法。 在一个实施例中，在基板上形成含钨材料的方法包括在设置在基板上的电介质层上形成含有氮化钛的粘合层，在粘合层上形成氮化钨中间层，其中氮化钨中间层 含有氮化钨和碳。 该方法还包括在热退火过程中（例如，从约700℃至小于1000℃的温度）通过热分解从氮化钨中间层形成钨阻挡层（例如，钨或钨 - 碳材料） ）。 随后，该方法包括任选地在钨阻挡层上形成成核层，任选地在浸泡过程期间将钨阻挡层和/或成核层暴露于还原剂，以及在钨阻挡层上或之上形成钨体层，以及 /或成核层。