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    • 1. 发明申请
    • Single-Sided Trench Contact Window
    • 单面沟槽接触窗口
    • US20100090348A1
    • 2010-04-15
    • US12249104
    • 2008-10-10
    • Inho ParkHans-Peter MollGouri Sankar KarLars Heineck
    • Inho ParkHans-Peter MollGouri Sankar KarLars Heineck
    • H01L23/48H01L21/76H01L21/82
    • H01L21/743
    • An integrated circuit is manufactured from a semiconductor substrate having trenches with first and second sidewalls facing each other and a conductive line arranged in a bottom region of the trenches. At least the bottom region of the trenches is lined with an insulative material between the conductive line and the substrate. A first sacrificial layer is formed above the conductive line adjacent the first and second sidewalls. The trenches are filled with one or more additional sacrificial layers having a different etch selectivity than the first sacrificial layer. A portion of the one or more additional sacrificial layers and a portion of the insulative material are selectively removed to the first sacrificial layer so that the substrate is exposed below the first sacrificial layer along the first trench sidewalls and covered by the insulative material along the second trench sidewalls.
    • 集成电路由具有第一和第二侧壁彼此面对的沟槽的半导体衬底和布置在沟槽的底部区域中的导电线制成。 沟槽的至少底部区域在导电线和衬底之间衬有绝缘材料。 第一牺牲层形成在与第一和第二侧壁相邻的导电线的上方。 沟槽填充有一个或多个具有与第一牺牲层不同的蚀刻选择性的附加牺牲层。 所述一个或多个附加牺牲层的一部分和所述绝缘材料的一部分被选择性地移除到所述第一牺牲层,使得所述衬底沿着所述第一沟槽侧壁暴露在所述第一牺牲层下方并且沿着所述第二牺牲层被所述绝缘材料覆盖 沟槽侧壁。
    • 5. 发明申请
    • BURIED WORD LINE STRUCTURE AND METHOD OF FORMING THE SAME
    • US20140159140A1
    • 2014-06-12
    • US13706366
    • 2012-12-06
    • Inho ParkLars Heineck
    • Inho ParkLars Heineck
    • H01L29/78H01L21/28
    • H01L21/76224H01L21/28017H01L27/115H01L29/7827
    • A method of forming a buried word line structure is provided. A first mask layer, an interlayer and a second mask layer are sequentially formed on a substrate, wherein the second mask layer has a plurality of mask patterns and a plurality of gaps arranged alternately, and the gaps includes first gaps and second gaps arranged alternately. A dielectric pattern is formed in each first gap and spacers are simultaneously formed on sidewalls of each second gap, wherein a first trench is formed between the adjacent spacers and exposes a portion of the first mask layer. The mask patterns are removed to form second trenches. An etching process is performed by using the dielectric patterns and the spacers as a mask, so that the first trenches are deepened to the substrate and the second trenches are deepened to the first mask layer.
    • 提供一种形成掩埋字线结构的方法。 第一掩模层,中间层和第二掩模层依次形成在基板上,其中第二掩模层具有多个掩模图案和交替布置的多个间隙,并且间隙包括交替布置的第一间隙和第二间隙。 在每个第一间隙中形成电介质图案,并且间隔件同时形成在每个第二间隙的侧壁上,其中在相邻间隔物之间​​形成第一沟槽并露出第一掩模层的一部分。 去除掩模图案以形成第二沟槽。 通过使用电介质图案和间隔物作为掩模来执行蚀刻工艺,使得第一沟槽加深到衬底,并且第二沟槽加深到第一掩模层。
    • 6. 发明授权
    • Buried word line structure and method of forming the same
    • 掩埋字线结构及其形成方法
    • US08735267B1
    • 2014-05-27
    • US13706366
    • 2012-12-06
    • Inho ParkLars Heineck
    • Inho ParkLars Heineck
    • H01L21/20
    • H01L21/76224H01L21/28017H01L27/115H01L29/7827
    • A method of forming a buried word line structure is provided. A first mask layer, an interlayer and a second mask layer are sequentially formed on a substrate, wherein the second mask layer has a plurality of mask patterns and a plurality of gaps arranged alternately, and the gaps includes first gaps and second gaps arranged alternately. A dielectric pattern is formed in each first gap and spacers are simultaneously formed on sidewalls of each second gap, wherein a first trench is formed between the adjacent spacers and exposes a portion of the first mask layer. The mask patterns are removed to form second trenches. An etching process is performed by using the dielectric patterns and the spacers as a mask, so that the first trenches are deepened to the substrate and the second trenches are deepened to the first mask layer.
    • 提供一种形成掩埋字线结构的方法。 第一掩模层,中间层和第二掩模层依次形成在基板上,其中第二掩模层具有多个掩模图案和交替布置的多个间隙,并且间隙包括交替布置的第一间隙和第二间隙。 在每个第一间隙中形成电介质图案,并且间隔件同时形成在每个第二间隙的侧壁上,其中在相邻间隔物之间​​形成第一沟槽并露出第一掩模层的一部分。 去除掩模图案以形成第二沟槽。 通过使用电介质图案和间隔物作为掩模来执行蚀刻工艺,使得第一沟槽加深到衬底,并且第二沟槽加深到第一掩模层。