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    • 2. 发明授权
    • Method for manufacturing semiconductor device having vertical transistor
    • 具有垂直晶体管的半导体器件的制造方法
    • US07871913B2
    • 2011-01-18
    • US12335668
    • 2008-12-16
    • Jong Han ShinHyung Soon ParkJum Yong ParkSung Jun Kim
    • Jong Han ShinHyung Soon ParkJum Yong ParkSung Jun Kim
    • H01L21/3205H01L21/4763
    • H01L29/66666H01L29/4236H01L29/42376H01L29/7827
    • A method for manufacturing a semiconductor device having a vertical transistor includes forming hard masks on a semiconductor substrate to expose portions of the semiconductor substrate. Then the exposed portions of the semiconductor substrate are etched to define grooves in the semiconductor substrate. A gate conductive layer is formed on the hard masks and surfaces of the grooves to a thickness that does not completely fill the grooves. A sacrificial layer is formed on the gate conductive layer to completely fill the grooves. A partial thickness of the sacrificial layer is removed to expose the gate conductive layer and portions of the gate conductive layer formed on the hard masks and on sidewalls of upper portions of the grooves are removed. The remaining sacrificial layer is completely removed. Gates are formed on sidewalls of lower portions of the grooves by etching the gate conductive layer.
    • 一种制造具有垂直晶体管的半导体器件的方法包括:在半导体衬底上形成硬掩模以暴露半导体衬底的部分。 然后蚀刻半导体衬底的暴露部分以在半导体衬底中限定凹槽。 在硬掩模和凹槽的表面上形成栅极导电层至不完全填充凹槽的厚度。 牺牲层形成在栅极导电层上以完全填充凹槽。 去除牺牲层的部分厚度以露出栅极导电层,并且去除形成在硬掩模上的栅极导电层的部分以及沟槽上部的侧壁上的部分。 剩余的牺牲层被完全去除。 通过蚀刻栅极导电层在栅极的下部的侧壁上形成栅极。