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    • 17. 发明授权
    • PMOS device having a layered silicon gate for improved silicide integrity and enhanced boron penetration resistance
    • PMOS器件具有用于改善硅化物完整性和增强的硼渗透电阻的层状硅栅极
    • US06313021B1
    • 2001-11-06
    • US09416491
    • 1999-10-12
    • Sailesh M. MerchantJoseph R. RadosevichPradip K. Roy
    • Sailesh M. MerchantJoseph R. RadosevichPradip K. Roy
    • H01L213205
    • H01L21/28035H01L21/28044H01L21/28061H01L21/823835H01L21/823842H01L29/4933H01L29/4941
    • The present invention provides a process for forming a sub-micron p-type metal oxide semiconductor (PMOS) structure on a semiconductor substrate. The process includes forming a gate oxide on the semiconductor substrate, forming a gate layer on the gate oxide by depositing a first gate layer on the gate oxide at a first deposition rate and depositing a second gate layer on the first layer at a second deposition rate to provide an improved stress accommodation within the gate structure. The process further includes forming a silicide dopant barrier on the gate. Due to the presence of the improved stress accommodation in the gate, the integrity of the silicide dopant barrier is substantially enhanced. This increased silicide integrity prevents significant damage to the silicide dopant barrier layer during subsequent fabrication processes. As such, the dopant barrier is able to provide the intended degree of resistance to dopant penetration, for example boron, during the formation of source and drain regions adjacent the gate structure.
    • 本发明提供了一种在半导体衬底上形成亚微米p型金属氧化物半导体(PMOS)结构的方法。 该工艺包括在半导体衬底上形成栅极氧化物,通过以第一沉积速率沉积栅极氧化物上的第一栅极层,以栅极氧化物形成栅极层,并以第二沉积速率在第一层上沉积第二栅极层 以在门结构内提供改进的应力调节。 该工艺还包括在栅极上形成硅化物掺杂剂阻挡层。 由于在栅极中存在改善的应力调节,硅化物掺杂剂势垒的完整性显着增强。 这种增加的硅化物完整性防止在随后的制造工艺期间对硅化物掺杂剂阻挡层的显着损坏。 因此,在形成与栅极结构相邻的源极和漏极区域期间,掺杂物势垒能够提供对掺杂剂穿透(例如硼)的预期程度的阻抗。