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公开(公告)号:US07785957B2
公开(公告)日:2010-08-31
申请号:US12344422
申请日:2008-12-26
IPC分类号: H01L21/00
CPC分类号: H01L21/02071 , H01L21/28079 , H01L21/28097 , H01L21/31138 , H01L21/823857 , Y10S438/906
摘要: A method for fabricating a CMOS integrated circuit (IC) includes providing a substrate having a semiconductor surface, wherein the semiconductor surface has PMOS regions for PMOS devices and NMOS regions for NMOS devices. A gate dielectric layer is formed on the semiconductor surface followed by forming at least a first metal including layer on the gate dielectric layer. A polysilicon or amorphous silicon layer is formed on the first metal including layer to form an intermediate gate electrode stack. A masking pattern is formed on the intermediate gate electrode stack. The polysilicon or amorphous silicon layer is dry etched using the masking pattern to define a patterned intermediate gate electrode stack over the NMOS or PMOS regions, wherein the dry etching stops on a portion of the first metal comprising layer. The masking pattern is removed using a first post etch clean for stripping the masking pattern. A multi-step solution cleaning sequence is used after the removing step and includes a first wet clean including sulfuric acid and a fluoride, and a second wet clean after the first wet clean including a fluoride. Fabrication of the IC is then completed.
摘要翻译: 一种制造CMOS集成电路(IC)的方法包括提供具有半导体表面的衬底,其中半导体表面具有用于PMOS器件的PMOS区域和用于NMOS器件的NMOS区域。 在半导体表面上形成栅极电介质层,然后在栅极介电层上至少形成第一金属包层。 在第一金属包含层上形成多晶硅或非晶硅层以形成中间栅电极堆叠。 在中间栅电极堆叠上形成掩模图案。 使用掩模图案干蚀刻多晶硅或非晶硅层,以在NMOS或PMOS区域上限定图案化的中间栅电极堆叠,其中干蚀刻停止在第一金属层的一部分上。 使用第一后蚀刻清洁来去除掩模图案以剥离掩模图案。 在去除步骤之后使用多步骤溶液清洗顺序,并且包括包括硫酸和氟化物在内的第一次湿清洗,以及在第一次湿清洁之后包括氟化物的第二次湿清洁。 然后完成IC的制造。
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公开(公告)号:US06921721B2
公开(公告)日:2005-07-26
申请号:US10692609
申请日:2003-10-24
IPC分类号: B08B7/00 , H01L21/02 , H01L21/304 , H01L21/306 , H01L21/3065 , H01L21/311 , H01L21/76 , H01L21/762 , H01L21/302 , H01L21/461
CPC分类号: H01L21/02054 , H01L21/02063 , H01L21/31111 , H01L21/76224
摘要: The present invention provides a process of manufacturing a semiconductor device that comprises a process of manufacturing a semiconductor device that includes plasma etching 250 through a patterned hardmask layer 210 located over a semiconductor substrate 225 wherein the plasma etching forms a modified layer 210a on the hardmask layer 210, and removing at least a substantial portion of the modified layer 210a by exposing the modified layer 210a to a post plasma clean process.
摘要翻译: 本发明提供一种制造半导体器件的方法,该方法包括制造半导体器件的工艺,该半导体器件包括通过位于半导体衬底225上的图案化掩模层210的等离子体蚀刻250,其中等离子体蚀刻在硬掩模上形成修饰层210a 层210,并且通过将改性层210a暴露于后等离子体清洁工艺来去除至少大部分改性层210a。
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