Transistor having an embedded tensile strain layer with reduced offset to the gate electrode and a method for forming the same
    5.
    发明授权
    Transistor having an embedded tensile strain layer with reduced offset to the gate electrode and a method for forming the same 有权
    具有嵌入式拉伸应变层的晶体管,其具有减小的偏移到栅电极的方法及其形成方法

    公开(公告)号:US07659213B2

    公开(公告)日:2010-02-09

    申请号:US11566840

    申请日:2006-12-05

    摘要: By incorporating carbon by means of ion implantation and a subsequent flash-based or laser-based anneal process, strained silicon/carbon material with tensile strain may be positioned in close proximity to the channel region, thereby enhancing the strain-inducing mechanism. The carbon implantation may be preceded by a pre-amorphization implantation, for instance on the basis of silicon. Moreover, by removing a spacer structure used for forming deep drain and source regions, the degree of lateral offset of the strained silicon/carbon material with respect to the gate electrode may be determined substantially independently from other process requirements. Moreover, an additional sidewall spacer used for forming metal silicide regions may be provided with reduced permittivity, thereby additionally contributing to an overall performance enhancement.

    摘要翻译: 通过离子注入和随后的基于闪光或基于激光的退火工艺引入碳,具有拉伸应变的应变硅/碳材料可以紧邻通道区域定位,从而增强应变诱导机制。 可以在碳注入之前进行预非晶化注入,例如基于硅。 此外,通过去除用于形成深漏极和源极区的间隔结构,应变硅/碳材料相对于栅极的横向偏移程度可以基本上独立于其它工艺要求来确定。 此外,用于形成金属硅化物区域的附加侧壁间隔物可以具有降低的介电常数,从而另外有助于整体性能提高。