Methods of forming a multilayer stack alloy for work function engineering
    1.
    发明授权
    Methods of forming a multilayer stack alloy for work function engineering 有权
    形成工作功能工程多层叠合金的方法

    公开(公告)号:US07122870B2

    公开(公告)日:2006-10-17

    申请号:US10916191

    申请日:2004-08-09

    CPC分类号: H01L21/28088 H01L29/4966

    摘要: A method of forming a gate electrode is described, comprising forming a dielectric layer on a substrate, forming a first metal layer having a first work function on the dielectric layer, forming a second metal layer having a second work function on the first metal layer, such that a gate electrode is formed on the dielectric layer which has a work function that is determined from the work function of the alloy of the two types of metal. The work function of a microelectronic transistor can be varied or “tuned” depending on the precise definition and control of the metal types, layer sequence, individual layer thickness and total number of layers.

    摘要翻译: 描述了形成栅电极的方法,包括在基片上形成电介质层,在介电层上形成具有第一功函数的第一金属层,在第一金属层上形成具有第二功函数的第二金属层, 使得在电介质层上形成栅电极,其具有由两种类型的金属的合金的功函数确定的功函数。 微电子晶体管的功能可以根据金属类型,层序列,单层厚度和总层数的精确定义和控制而变化或“调谐”。