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    • 95. 发明授权
    • Method of making a semiconductor device with embedded stressor
    • 制造具有嵌入式应力源的半导体器件的方法
    • US07736957B2
    • 2010-06-15
    • US11756095
    • 2007-05-31
    • Paul A. GrudowskiVeeraraghavan DhandapaniDarren V. GoedekeVoon-Yew TheanStefan Zollner
    • Paul A. GrudowskiVeeraraghavan DhandapaniDarren V. GoedekeVoon-Yew TheanStefan Zollner
    • H01L21/00H01L21/84
    • H01L29/7848H01L29/165H01L29/66628H01L29/66636H01L29/7834
    • A method for forming a semiconductor device includes providing a semiconductor substrate; forming a gate dielectric over the semiconductor substrate; forming a gate electrode over the gate dielectric; forming an insulating layer over a sidewall of the gate electrode; defining source and drain regions in the semiconductor substrate adjacent to the insulating layer; implanting a dopant in the source and drain regions of the semiconductor substrate to form doped source and drain regions; forming a sidewall spacer adjacent to the insulating layer; forming a recess in the semiconductor substrate in the source and drain regions, wherein the recess extends directly underneath the spacer a predetermined distance from a channel regions; and forming a stressor material in the recess. The method allows the stressor material to be formed closer to a channel region, thus improving carrier mobility in the channel while not degrading short channel effects.
    • 一种形成半导体器件的方法包括提供半导体衬底; 在所述半导体衬底上形成栅极电介质; 在所述栅极电介质上形成栅电极; 在所述栅电极的侧壁上形成绝缘层; 限定与绝缘层相邻的半导体衬底中的源区和漏区; 在所述半导体衬底的源区和漏区中注入掺杂剂以形成掺杂源极和漏极区; 形成邻近所述绝缘层的侧壁间隔物; 在所述源极和漏极区域中的所述半导体衬底中形成凹部,其中所述凹部直接在所述间隔物的下方延伸距离沟道区域预定的距离; 以及在所述凹部中形成应力源材料。 该方法允许应力源材料形成得更靠近沟道区,从而改善通道中的载流子迁移率,同时不会降低短沟道效应。
    • 99. 发明授权
    • Transitional dielectric layer to improve reliability and performance of high dielectric constant transistors
    • 过渡介电层提高高介电常数晶体管的可靠性和性能
    • US07235502B2
    • 2007-06-26
    • US11096515
    • 2005-03-31
    • Sriram S. KalpatVoon-Yew TheanHsing H. TsengOlubunmi O. Adetutu
    • Sriram S. KalpatVoon-Yew TheanHsing H. TsengOlubunmi O. Adetutu
    • H01L21/31
    • H01L21/022H01L21/02175H01L21/0228H01L21/28194H01L21/3141H01L29/513H01L29/517
    • A gate dielectric structure (201) fabrication process includes forming a transitional dielectric film (205) overlying a silicon oxide film (204). A high dielectric constant film (206) is then formed overlying an upper surface of the transitional dielectric film (205). The composition of the transitional dielectric film (205) at the silicon oxide film (204) interface primarily comprises silicon and oxygen. The high K dielectric (206) and the composition of the transitional dielectric film (205) near the upper surface primarily comprise a metal element and oxygen. Forming the transitional dielectric film (205) may include forming a plurality of transitional dielectric layers (207) where the composition of each successive transitional dielectric layer (207) has a higher concentration of the metal element and a lower concentration of silicon. Forming the transitional dielectric layer (205) may include performing multiple cycles of an atomic layer deposition process (500) where a precursor concentration for each cycle differs from the precursor concentration of the preceding cycle.
    • 栅极电介质结构(201)制造工艺包括形成覆盖氧化硅膜(204)的过渡电介质膜(205)。 然后形成覆盖在过渡介电膜(205)的上表面上的高介电常数膜(206)。 氧化硅膜(204)界面处的过渡电介质膜(205)的组成主要包括硅和氧。 高K电介质(206)和上表面附近的过渡电介质膜(205)的组成主要包括金属元素和氧。 形成过渡电介质膜(205)可以包括形成多个过渡介电层(207),其中每个连续的过渡介电层(207)的组成具有较高的金属元素浓度和较低的硅浓度。 形成过渡电介质层(205)可以包括执行原子层沉积工艺(500)的多个循环,其中每个循环的前体浓度与先前循环的前体浓度不同。