Method for fabricating a trench structure which is electrically connected to a substrate on one side via a buried contact
    51.
    发明申请
    Method for fabricating a trench structure which is electrically connected to a substrate on one side via a buried contact 失效
    一种用于制造沟槽结构的方法,所述沟槽结构通过埋入触点一端电连接到衬底

    公开(公告)号:US20050032324A1

    公开(公告)日:2005-02-10

    申请号:US10886053

    申请日:2004-07-08

    CPC分类号: H01L21/76895 H01L27/10867

    摘要: A method for fabricating a trench structure, in particular a trench capacitor with an insulation collar, which is electrically connected to a substrate on one side via a buried contact. Fabrication includes, for example, providing a trench in the substrate using a hard mask with a corresponding mask opening; providing an at least partial trench filling; providing a liner on the resulting structure; carrying out an oblique implantation of impurity ions onto the liner for altering the etching properties of an implanted partial region of the liner; selectively removing the implanted partial region of the liner by a first etching for forming a liner mask from the complimentary partial region of the liner, which partially masks the top side of the trench filling; removing a part of the trench filling by a second etching using the liner mask; and replacing the removed part of the trench filling.

    摘要翻译: 一种用于制造沟槽结构的方法,特别是具有绝缘套环的沟槽电容器,其通过埋入触点电连接到一侧的衬底。 制造包括例如使用具有相应的掩模开口的硬掩模在衬底中提供沟槽; 提供至少部分沟槽填充; 在所得结构上提供衬垫; 将杂质离子倾斜地注入到衬垫上,以改变衬垫的注入部分区域的蚀刻性能; 通过第一蚀刻选择性地去除衬垫的注入部分区域,用于从衬垫的互补部分区域形成衬垫掩模,其部分地掩盖沟槽填充物的顶侧; 使用所述衬垫掩模通过第二蚀刻去除所述沟槽填充的一部分; 并更换去除的沟槽填充部分。

    Etch selectivity inversion for etching along crystallographic directions in silicon
    52.
    发明授权
    Etch selectivity inversion for etching along crystallographic directions in silicon 有权
    用于沿着硅中的晶体方向蚀刻的蚀刻选择性反转

    公开(公告)号:US06566273B2

    公开(公告)日:2003-05-20

    申请号:US09893157

    申请日:2001-06-27

    申请人: Stephan Kudelka

    发明人: Stephan Kudelka

    IPC分类号: H01L21302

    摘要: Methods for expanding trenches are disclosed. A trench is formed in a substrate having side walls including at least two crystallographic planes. One crystallographic plane is etchable at a faster rate than a second crystallographic plane. A dielectric layer is selectively grown on surfaces of the crystallographic planes such that the dielectric layer includes a greater thickness on one of the crystallographic plane than on the other. The dielectric layer and the substrate are etched such that an etch rate inversion is achieved. That is, the second crystallographic plane is effectively etched at a faster rate than the first crystallographic plane.

    摘要翻译: 公开了扩大沟槽的方法。 在具有包括至少两个结晶平面的侧壁的基板中形成沟槽。 一个结晶平面可以以比第二个结晶平面更快的速度进行刻蚀。 电介质层选择性地生长在结晶平面的表面上,使得电介质层在结晶平面之一上包括比另一层上更大的厚度。 蚀刻电介质层和衬底,使得实现蚀刻速率反转。 也就是说,以比第一结晶平面更快的速率有效地蚀刻第二结晶平面。

    Process flow for sacrificial collar with poly mask
    53.
    发明授权
    Process flow for sacrificial collar with poly mask 有权
    具有聚面罩的牺牲套管的工艺流程

    公开(公告)号:US06458647B1

    公开(公告)日:2002-10-01

    申请号:US09940761

    申请日:2001-08-27

    IPC分类号: H01L218242

    摘要: A process for forming a sacrificial collar (116) on the top portion of a deep trench (114). A nitride layer (116) is deposited within the trench (114). A semiconductor layer (120) is deposited over the nitride layer (116). A top portion of the semiconductor layer (120) is doped to form doped semiconductor layer (124). Undoped portions (120) of the semiconductor layer are removed, and the doped semiconductor layer (124) is used to pattern the nitride layer (116), removing the lower portion of nitride layer (116) from within deep trenches (114) and leaving a sacrificial collar (116) at the top of the trenches (114).

    摘要翻译: 一种用于在深沟槽(114)的顶部上形成牺牲套环(116)的工艺。 氮化物层(116)沉积在沟槽(114)内。 半导体层(120)沉积在氮化物层(116)上。 掺杂半导体层(120)的顶部以形成掺杂半导体层(124)。 去除半导体层的未掺杂部分(120),并且使用掺杂半导体层(124)对氮化物层(116)进行图案化,从深沟槽(114)中去除氮化物层(116)的下部并离开 在所述沟槽(114)的顶部处的牺牲套环(116)。

    Buried strap formation without TTO deposition
    55.
    发明授权
    Buried strap formation without TTO deposition 有权
    埋藏带形成没有TTO沉积

    公开(公告)号:US06406970B1

    公开(公告)日:2002-06-18

    申请号:US09945007

    申请日:2001-08-31

    IPC分类号: H01L218242

    CPC分类号: H01L27/10867

    摘要: A process for forming a buried strap for memory cells of a semiconductor device having reduced process complexity and improved thickness control of the top trench oxide (TTO) (26). A first oxide layer (16) is deposited over a substrate (11) having trenches formed therein. A first semiconductor material (18) is deposited within the trenches (14). A nitride layer (20) is formed over exposed semiconductor substrate (20) within trenches (14), and a second semiconductor layer (22) is deposited over the nitride layer (20). The top surfaces of the second semiconductor layer (22) are doped to form doped regions (24) and leave undoped second semiconductor layer (22) on the trench (14) sidewalls. The undoped second semiconductor layer (22) is removed from the trench (14) sidewalls, and the doped semiconductor layer (24) within the trench (14) is oxidized to form an oxide region (26), which forms a TTO, within the doped second semiconductor layer (24).

    摘要翻译: 一种用于形成半导体器件的存储单元的掩埋带的工艺,其具有降低的工艺复杂性和改进顶部沟槽氧化物(TTO)(26)的厚度控制。 在其上形成有沟槽的衬底(11)上沉积第一氧化物层(16)。 第一半导体材料(18)沉积在沟槽(14)内。 氮化物层(20)形成在沟槽(14)内的暴露的半导体衬底(20)之上,并且第二半导体层(22)沉积在氮化物层(20)上。 第二半导体层(22)的顶表面被掺杂以形成掺杂区域(24)并且在沟槽(14)侧壁上留下未掺杂的第二半导体层(22)。 从沟槽(14)侧壁去除未掺杂的第二半导体层(22),并且在沟槽(14)内的掺杂半导体层(24)被氧化以形成一个形成TTO的氧化物区域(26) 掺杂的第二半导体层(24)。

    Low temperature sacrificial oxide formation
    56.
    发明授权
    Low temperature sacrificial oxide formation 有权
    低温牺牲氧化物形成

    公开(公告)号:US06309983B1

    公开(公告)日:2001-10-30

    申请号:US09324926

    申请日:1999-06-03

    IPC分类号: H01L2131

    摘要: A method for depositing a sacrificial oxide for fabricating a semiconductor device includes preparing p-doped silicon regions on a semiconductor wafer for depositing a sacrificial oxide on the p-doped silicon regions. The method also includes the step of placing the wafer in an electrochemical cell such that a solution including electrolytes interacts with the p-doped silicon regions to form a sacrificial oxide on the p-doped silicon regions when a potential difference is provided between the wafer and the solution. Processing the wafer using the sacrificial oxide layer is also included.

    摘要翻译: 用于沉积用于制造半导体器件的牺牲氧化物的方法包括在半导体晶片上制备用于在p掺杂硅区域上沉积牺牲氧化物的p掺杂硅区域。 该方法还包括以下步骤:将晶片放置在电化学电池中,使得包含电解质的溶液与p掺杂的硅区相互作用以在p掺杂的硅区上形成牺牲氧化物,当晶片和 解决方案。 还包括使用牺牲氧化物层处理晶片。

    Dual gate oxide process for uniform oxide thickness
    57.
    发明授权
    Dual gate oxide process for uniform oxide thickness 有权
    双栅氧化法,均匀氧化物厚度

    公开(公告)号:US06261972B1

    公开(公告)日:2001-07-17

    申请号:US09706641

    申请日:2000-11-06

    IPC分类号: H01L2100

    摘要: A process for forming dual gate oxides of improved oxide thickness uniformity for use in high performance DRAM systems or logic circuits, comprising: a) growing a sacrificial oxide layer on a substrate; b) implanting a dopant through the sacrificial oxide layer; c) implanting a first dosage of nitrogen ions in the absence of a photoresist to form a nitrided silicon layer; d) subjecting the substrate to a rapid thermal anneal for a sufficient time and at a sufficient temperature to allow nitrogen to diffuse to the silicon/oxide interface; e) masking the substrate with a photoresist to define the locations of the thin oxides of the dual gate oxide; f) implanting a second dosage of nitrogen ions through the photoresist; g) stripping the photoresist and the sacrificial oxide layers; and h) growing by oxidation gate oxide layers characterized by improved oxide thickness uniformity in the nitrogen ion implanted areas in the thin and thick oxides.

    摘要翻译: 一种用于形成用于高性能DRAM系统或逻辑电路的改进的氧化物厚度均匀性的双栅极氧化物的方法,包括:a)在衬底上生长牺牲氧化物层; b)通过所述牺牲氧化物层注入掺杂剂; c) 不存在光致抗蚀剂的氮离子的第一剂量形成氮化硅层; d)对衬底进行快速热退火足够的时间和足够的温度以允许氮扩散到硅/氧化物界面; e)用光致抗蚀剂掩蔽衬底以限定双栅氧化物的薄氧化物的位置; f)通过光致抗蚀剂注入第二剂量的氮离子; g)剥离光致抗蚀剂和牺牲氧化物层; 和)通过氧化栅氧化层生长,其特征在于在薄和厚的氧化物中的氮离子注入区域中改善的氧化物厚度均匀性。

    Method of producing a conductive layer including two metal nitrides
    58.
    发明授权
    Method of producing a conductive layer including two metal nitrides 失效
    制造包含两个金属氮化物的导电层的方法

    公开(公告)号:US07531418B2

    公开(公告)日:2009-05-12

    申请号:US11296568

    申请日:2005-12-08

    IPC分类号: H01L21/20

    摘要: In a method for producing a conductive layer a substrate is provided. On the substrate, a layer includes at least two different metal nitrides. In one embodiment, on a surface of the substrate a first metal nitride layer is deposited, followed by a second metal nitride layer formed thereon. A third metal layer is then deposited on a surface of the second metal nitride layer.

    摘要翻译: 在制造导电层的方法中,提供了基板。 在衬底上,层包括至少两种不同的金属氮化物。 在一个实施例中,在衬底的表面上沉积第一金属氮化物层,随后形成第二金属氮化物层。 然后在第二金属氮化物层的表面上沉积第三金属层。

    Method for fabricating a capacitor
    59.
    发明授权
    Method for fabricating a capacitor 失效
    制造电容器的方法

    公开(公告)号:US07402860B2

    公开(公告)日:2008-07-22

    申请号:US11179052

    申请日:2005-07-11

    IPC分类号: H01L27/108

    CPC分类号: H01L28/40

    摘要: The present invention relates to a method of fabricating a capacitor in a semiconductor substrate. The capacitor is fabricated such that the capacitor comprises: a trench inside a substrate, the trench having a lower region and an upper region, wherein the trench's diameters in the lower region is larger than in the upper region; a first electrode; a dielectric layer on top of the first electrode; a conductive layer on top of the electric layer, the conductive layer forming a second electrode of the capacitor; and a plug forming a closed cavity inside the lower region.

    摘要翻译: 本发明涉及在半导体衬底中制造电容器的方法。 电容器被制造成使得电容器包括:衬底内的沟槽,沟槽具有下部区域和上部区域,其中下部区域中的沟槽直径大于上部区域中的沟槽直径; 第一电极; 位于所述第一电极顶部的电介质层; 在所述电层顶部的导电层,所述导电层形成所述电容器的第二电极; 以及在下部区域内形成闭合腔的塞子。