公开(公告)号：US08975187B2

公开(公告)日：2015-03-10

申请号：US13925495

申请日：2013-06-24

Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.

Inventor： Rueijer Lin ,  Chun-Chieh Lin ,  Hung-Wen Su ,  Minghsing Tsai

IPC: H01L21/311 ,  B81C1/00 ,  B81B7/00 ,  H01L21/308

CPC classification number: B81C1/00158 ,  B81B7/008 ,  B81B2207/015 ,  B81B2207/096 ,  B81C1/00246 ,  B81C1/00333 ,  B81C1/00539 ,  B81C2201/0109 ,  B81C2201/0132 ,  B81C2203/0118 ,  B81C2203/0127 ,  B81C2203/0742 ,  B81C2203/0778 ,  H01L21/02175 ,  H01L21/02178 ,  H01L21/02186 ,  H01L21/02247 ,  H01L21/02274 ,  H01L21/02337 ,  H01L21/0332 ,  H01L21/3081 ,  H01L21/31111 ,  H01L21/31144 ,  H01L21/76802

Abstract: Disclosed is a method to form a titanium nitride (TiN) hard mask in the Damascene process of forming interconnects during the fabrication of a semiconductor device, while the type and magnitude of stress carried by the TiN hard mask is controlled. The TiN hard mask is formed in a multi-layered structure where each sub-layer is formed successively by repeating a cycle of processes comprising TiN and chlorine PECVD deposition, and N2/H2 plasma gas treatment. During its formation, the stress to be carried by the TiN hard mask is controlled by controlling the number of TiN sub-layers and the plasma gas treatment duration such that the stress may counter-balance predetermined external stress anticipated on a conventionally made TiN hard mask, which causes trench sidewall distortion, trench opening shrinkage, and gap filling problem.

Abstract translation: 公开了在制造半导体器件期间形成互连的镶嵌工艺中形成氮化钛（TiN）硬掩模的方法，同时控制由TiN硬掩模承载的应力的类型和大小。 TiN硬掩模以多层结构形成，其中通过重复包括TiN和氯PECVD沉积以及N2 / H2等离子体气体处理的工艺循环来连续形成每个子层。 在其形成期间，通过控制TiN子层的数量和等离子体气体处理持续时间来控制由TiN硬掩模承载的应力，使得应力可以平衡在常规制备的TiN硬掩模上预期的预定外部应力 ，这导致沟槽侧壁变形，沟槽开口收缩和间隙填充问题。