Method for manufacturing non volatile memory cells
    1.
    发明公开
    Method for manufacturing non volatile memory cells 审中-公开
    Verfahren zur Herstellung von Festwertspeicherzellen

    公开(公告)号:EP1804294A1

    公开(公告)日:2007-07-04

    申请号:EP05425943.7

    申请日:2005-12-30

    CPC classification number: H01L27/11521 H01L21/28273 H01L27/115

    Abstract: Method for manufacturing non volatile memory cells integrated on a semiconductor substrate (100), each one comprising a floating gate electrode (110), the method comprising the steps of:
    - depositing at least one protective layer (30) on the semiconductor substrate (100),
    - forming a first plurality of openings (40) in the protective layer (30),
    - etching the semiconductor substrate (100) through the first plurality of openings (40) so as to form a plurality of trenches (60),
    - filling in the plurality of trenches (60) and the first plurality of openings (40) by means of an insulation layer (70),
    - etching surface portions of the protective layer (30) to form:
    - surface portions (71) of the insulation layer (70) projecting from the semiconductor substrate (100) divided from each other by a second plurality of openings (72), and
    - lower portions (31) of the protection layer (30) confined below the second plurality of openings (72),

    - etching the insulation layer (70) to reduce the cross dimensions of the surface portions (71) of the insulation layer (70),
    - removing the lower portions (31) of said protection layer (30) until the semiconductor substrate (100) is exposed.

    Abstract translation: 一种用于制造集成在半导体衬底(100)上的非易失性存储单元的方法,每个包括浮置栅电极(110),所述方法包括以下步骤: - 在半导体衬底(100)上沉积至少一个保护层(30) ), - 在所述保护层(30)中形成第一多个开口(40), - 通过所述第一多个开口(40)蚀刻所述半导体衬底(100),以形成多个沟槽(60), - 通过绝缘层(70)填充所述多个沟槽(60)和所述第一多个开口(40), - 蚀刻所述保护层(30)的表面部分以形成: - 所述保护层(30)的表面部分(71) 通过第二多个开口(72)从半导体衬底(100)突出的绝缘层(70),以及限定在第二多个开口(72)下方的保护层(30)的下部(31) ), - 蚀刻绝缘层(70)以减少交叉 绝缘层(70)的表面部分(71)的尺寸, - 去除所述保护层(30)的下部(31)直到半导体衬底(100)暴露。

    Method for manufacturing semiconductor integrated circuit structures
    2.
    发明公开
    Method for manufacturing semiconductor integrated circuit structures 有权
    Verfahren zur Herstellung von integrierten Halbleiterschaltungsstrukturen

    公开(公告)号:EP1387395A1

    公开(公告)日:2004-02-04

    申请号:EP02425505.1

    申请日:2002-07-31

    CPC classification number: H01L21/0337 H01L21/0338 H01L21/32139

    Abstract: A method for manufacturing circuit structures integrated in a semiconductor substrate (1) that includes regions (2), in particular isolation regions, the method comprising the steps of:

    depositing a conductive layer (3) to be patterned onto said semiconductor substrate (1);
    forming a first mask (4b) of a first material on said conductive layer (3);
    forming a second mask (5b) made of a second material that is different from the first and provided with first openings (10,12) of a first size (A) having spacers (8,8a) formed on their sidewalls to uncover portions of said first mask (4b) having a second width (B) which is smaller than the first;
    partly etching away said conductive layer (3) through said first and second masks (4b,5b) such to leave grooves (13) of said second width (B);
    removing said second mask (5a) and said spacers (8); and
    etching said grooves (13) through said first mask (4b) to uncover said regions (2) provided in said substrate (1) and form conductive lines (3a).

    Abstract translation: 一种用于制造集成在半导体衬底(1)中的电路结构的方法,该半导体衬底包括区域(2),特别是隔离区域,该方法包括以下步骤:将待图案化的导电层(3)沉积到所述半导体衬底(1)上, ; 在所述导电层(3)上形成第一材料的第一掩模(4b); 形成第二掩模(5b),所述第二掩模(5b)由与所述第一材料不同的第二材料制成,并且具有形成在其侧壁上的间隔物(8,8a)的第一尺寸(A)的第一开口(10,12) 所述第一掩模(4b)的第二宽度(B)小于第一宽度; 部分地通过所述第一和第二掩模(4b,5b)蚀刻所述导电层(3),以留下所述第二宽度(B)的凹槽(13); 去除所述第二掩模(5a)和所述隔离物(8); 以及通过所述第一掩模(4b)蚀刻所述凹槽(13)以露出设置在所述基板(1)中的所述区域(2)并形成导电线(3a)。

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