公开(公告)号：US20060094238A1

公开(公告)日：2006-05-04

申请号：US11305368

申请日：2005-12-16

申请人： Karl Levy ,  Junghwan Sung ,  Kaihan Ashtiani ,  James Fair ,  Joshua Collins ,  Juwen Gao

发明人： Karl Levy ,  Junghwan Sung ,  Kaihan Ashtiani ,  James Fair ,  Joshua Collins ,  Juwen Gao

IPC分类号： H01L21/44

CPC分类号： C23C16/4554 ,  C23C16/0272 ,  C23C16/34 ,  C23C16/45531 ,  C23C16/45534 ,  H01L21/28562 ,  H01L21/76843

摘要： Methods for depositing a tungsten nitride layer are described. The methods form a tungsten nitride layer using a carefully controlled deposition technique such as pulsed nucleation layer (PNL). Initially, a tungsten layer is formed on a substrate surface. The tungsten layer is then exposed to a nitriding agent to form a tungsten nitride layer. Methods of forming relatively thick layers of involve repeated cycles of contact with reducing agent, tungsten precursor and nitriding agent. In some cases, the cycle may also include contact with a dopant precursor such as phosphine or arsine.

公开(公告)号：US20050031786A1

公开(公告)日：2005-02-10

申请号：US10649351

申请日：2003-08-26

申请人： Sang-Hyeob Lee ,  Karl Levy ,  Aaron Fellis ,  Panya Wongsenakhum ,  Juwen Gao ,  Joshua Collins ,  Kaihan Ashtiani ,  Junghwan Sung ,  Lana Chan

发明人： Sang-Hyeob Lee ,  Karl Levy ,  Aaron Fellis ,  Panya Wongsenakhum ,  Juwen Gao ,  Joshua Collins ,  Kaihan Ashtiani ,  Junghwan Sung ,  Lana Chan

IPC分类号： H01L21/283 ,  H01L21/285 ,  H01L21/768 ,  C23C16/00

CPC分类号： H01L21/28562 ,  H01L21/28556 ,  H01L21/76843 ,  H01L21/76876 ,  H01L21/76877 ,  Y10S438/902

摘要： A tungsten nucleation film is formed on a surface of a semiconductor substrate by alternatively providing to that surface, reducing gases and tungsten-containing gases. Each cycle of the method provides for one or more monolayers of the tungsten film. The film is conformal and has improved step coverage, even for a high aspect ratio contact hole.

摘要翻译： 通过交替地向该表面提供还原气体和含钨气体，在半导体衬底的表面上形成钨成核膜。 该方法的每个循环提供了一个或多个钨膜的单层。 该膜是保形的，并且具有改进的台阶覆盖率，即使是高纵横比接触孔。