Uniformity Control for SI Dot Size in Flash Memory
    32.
    发明申请
    Uniformity Control for SI Dot Size in Flash Memory 审中-公开
    闪存中SI点大小的均匀性控制

    公开(公告)号:US20150311300A1

    公开(公告)日:2015-10-29

    申请号:US14261539

    申请日:2014-04-25

    Abstract: Some embodiments of the present disclosure relate to a method for forming flash memory. In this method, a tunnel oxide is formed over a semiconductor substrate. A layer of silicon dot nucleates is formed on the tunnel oxide. The layer of silicon dots includes silicon dot nucleates having respective initial sizes which differ according to a first size distribution. An etching process is performed to reduce the initial sizes of the silicon dot nucleates so reduced-size silicon dot nucleates have respective reduced sizes which differ according to a second size distribution. The second size distribution has a smaller spread than the first size distribution.

    Abstract translation: 本公开的一些实施例涉及用于形成快闪存储器的方法。 在该方法中,在半导体衬底上形成隧道氧化物。 在隧道氧化物上形成一层硅点成核。 硅点层包括具有根据第一尺寸分布而不同的各自的初始尺寸的硅点成核。 进行蚀刻处理以减小硅点成核的初始尺寸,因此尺寸减小的硅点成核具有根据第二尺寸分布而不同的相应减小的尺寸。 第二尺寸分布具有比第一尺寸分布更小的扩展。

    DEEP TRENCH CAPACITOR
    34.
    发明申请
    DEEP TRENCH CAPACITOR 有权
    深层电容电容

    公开(公告)号:US20140374880A1

    公开(公告)日:2014-12-25

    申请号:US13925984

    申请日:2013-06-25

    Abstract: The present disclosure relates to a method of forming a capacitor structure, including depositing a plurality of first polysilicon (POLY) layers of uniform thickness separated by a plurality of oxide/nitride/oxide (ONO) layers over a bottom and sidewalls of a recess and substrate surface. A second POLY layer is deposited over the plurality of first POLY layers, is separated by an ONO layer, and fills a remainder of the recess. Portions of the second POLY layer and the second ONO layer are removed with a first chemical-mechanical polish (CMP). A portion of each of the plurality of first POLY layers and the first ONO layers on the surface which are not within a doped region of the capacitor structure are removed with a first pattern and etch process such that a top surface of each of the plurality of first POLY layers is exposed for contact formation.

    Abstract translation: 本公开涉及一种形成电容器结构的方法,包括在凹槽的底部和侧壁上沉积由多个氧化物/氮化物/氧化物(ONO)层隔开的多个均匀厚度的多个第一多晶硅(POLY)层,以及 基材表面。 第二POLY层沉积在多个第一POLY层上,被ONO层隔开,并填充凹槽的其余部分。 用第一化学机械抛光(CMP)去除第二POLY层和第二ONO层的部分。 多个第一POLY层和表面上不在电容器结构的掺杂区域内的第一ONO层的一部分用第一图案和蚀刻工艺去除,使得多个第一POLY层中的每一个的顶表面 第一POLY层被暴露以形成接触。

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