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    • 113. 发明授权
    • Method to improve copper process integration
    • 改善铜工艺整合的方法
    • US06395642B1
    • 2002-05-28
    • US09473032
    • 1999-12-28
    • Chung-Shi LiuChen-Hua Yu
    • Chung-Shi LiuChen-Hua Yu
    • H01L21302
    • C25D5/34C25D7/123
    • A method is disclosed to improve copper process integration in the forming copper interconnects in integrated circuits. This is accomplished by integrating the process of forming a copper seed layer in an interconnect structure such as a trench or a groove, with the process of plasma cleaning of the structure prior to the electroplating of copper into the trench. NH3 plasma can be used for this purpose. Or, H2/N2 thermal reduction can also be employed. The integrated process promotes well-controlled electro-chemical deposition (ECD) of copper for solid filling of the trench.
    • 公开了一种改进集成电路中形成铜互连的铜工艺集成的方法。 这通过将铜晶种层形成在诸如沟槽或沟槽的互连结构中的过程与在电镀铜到沟槽之前对结构进行等离子体清洁的过程来实现。 NH3等离子体可用于此目的。 或者也可以使用H 2 / N 2热还原。 整合过程促进铜的良好控制的电化学沉积(ECD),用于固体填充沟槽。
    • 115. 发明授权
    • Method to eliminate dishing of copper interconnects
    • 消除铜互连凹陷的方法
    • US06225223B1
    • 2001-05-01
    • US09374297
    • 1999-08-16
    • Chung-Shi LiuChen-Hua Yu
    • Chung-Shi LiuChen-Hua Yu
    • H01L2144
    • H01L21/7684
    • A method of forming an interconnect, comprising the following steps. A dielectric layer, having an upper surface, is formed over a semiconductor structure. A trench, having side walls and a bottom, is formed within the dielectric layer. A barrier layer is then formed over the dielectric layer and lining the trench's side walls and bottom. A first copper layer is deposited on the barrier layer, filling the lined trench and blanket filling the barrier layer covered dielectric layer. The first copper layer is planarized, exposing the upper surface of the dielectric layer and forming a dished copper filled trench. A second copper layer is selectively deposited on the dished copper filled trench by either electroless plating or chemical vapor deposition (CVD). The second copper layer extending above the upper surface of the dielectric layer. The second copper layer is then planarized to form an essentially planar copper filled trench, or interconnect, level with the upper surface of said dielectric layer.
    • 一种形成互连的方法,包括以下步骤。 具有上表面的介电层形成在半导体结构之上。 具有侧壁和底部的沟槽形成在电介质层内。 然后在电介质层上形成阻挡层,并衬在沟槽的侧壁和底部。 第一铜层沉积在阻挡层上,填充衬里的沟槽并覆盖填充阻挡层覆盖的电介质层。 第一铜层被平坦化,暴露电介质层的上表面并形成填充有铜的沟槽。 通过无电镀或化学气相沉积(CVD),第二铜层选择性地沉积在带有填充铜的填充沟槽上。 第二铜层延伸到电介质层的上表面之上。 然后将第二铜层平坦化以形成与所述电介质层的上表面基本上平面的铜填充沟槽或互连级。
    • 116. 发明授权
    • Method for selective growth of Cu3Ge or Cu5Si for passivation of damascene copper structures and device manufactured thereby
    • 选择性生长Cu3Ge或Cu5Si用于钝化镶嵌铜结构的方法及其制造的器件
    • US06181013B2
    • 2001-01-30
    • US09524521
    • 2000-03-13
    • Chung-Shi LiuChen-Hua YuTien-I BaoSyun-Ming Jang
    • Chung-Shi LiuChen-Hua YuTien-I BaoSyun-Ming Jang
    • H01L2348
    • H01L21/76867H01L21/7684H01L21/76849
    • Form a dielectric layer on a surface of a conductive substrate with a trench through the top surface down to the substrate. Form a barrier layer over the dielectric layer including the exposed surface of the conductive substrate and the exposed sidewalls of the dielectric layer. Form a copper conductor over the barrier layer and overfilling the narrow hole in the trench. Etch away material from the surface of the copper conductor by a CMP process lowering the copper leaving a thin layer of copper over the barrier layer above the dielectric layer aside from the hole. Form a copper passivation by combining an element selected from silicon and germanium with copper on the exposed surfaces of the copper surfaces forming an interface in the narrower hole between the copper and the copper compound located below the dielectric top level. Etch away material from the surface of the copper compound and the barrier layer to planarize the copper compound by etching down to the dielectric top level leaving a thin layer of the copper passivation compound covering the copper conductor in the narrower hole.
    • 在具有沟槽的导电基底的表面上形成电介质层,通过顶表面向下延伸到衬底。 在包括导电基板的暴露表面和电介质层的暴露的侧壁的电介质层上形成阻挡层。 在阻挡层上形成一个铜导体,并且填充沟槽中的窄孔。 通过CMP工艺从铜表面蚀刻掉材料,在除了孔之外的电介质层之上的阻挡层上方,降低铜,从而留下薄的铜层。 通过将选自硅和锗的元素与铜的暴露表面上的铜组合形成铜钝化,在铜和化合物之间的较窄的孔中形成界面,位于电介质顶层之下。 从铜化合物的表面和阻挡层的表面蚀刻掉材料以通过蚀刻到电介质顶部水平来平坦化铜化合物,留下覆盖较窄孔中的铜导体的铜钝化化合物的薄层。
    • 119. 发明授权
    • Method for selective growth of Cu.sub.3 Ge or Cu.sub.5 Si for
passivation of damascene copper structures and device manufactured
thereby
    • 选择性生长Cu3Ge或Cu5Si用于钝化镶嵌铜结构的方法及其制造的器件
    • US06046108A
    • 2000-04-04
    • US344402
    • 1999-06-25
    • Chung-Shi LiuChen-Hua YuTien-I BaoSyun-Ming Jang
    • Chung-Shi LiuChen-Hua YuTien-I BaoSyun-Ming Jang
    • H01L21/768H01L21/44
    • H01L21/76867H01L21/7684H01L21/76849
    • Form a dielectric layer on a surface of a conductive substrate with a trench through the top surface down to the substrate. Form a barrier layer over the dielectric layer including the exposed surface of the conductive substrate and the exposed sidewalls of the dielectric layer. Form a copper conductor over the barrier layer and overfilling the narrow hole in the trench. Etch away material from the surface of the copper conductor by a CMP process lowering the copper leaving a thin layer of copper over the barrier layer above the dielectric layer aside from the hole. Form a copper passivation by combining an element selected from silicon and germanium with copper on the exposed surfaces of the copper surfaces forming an interface in the narrower hole between the copper and the copper compound located below the dielectric top level. Etch away material from the surface of the copper compound and the barrier layer to planiarize the copper compound by etching down to the dielectric top level leaving a thin layer of the copper passivation compound covering the copper conductor in the narrower hole.
    • 在具有沟槽的导电基底的表面上形成电介质层,通过顶表面向下延伸到衬底。 在包括导电基底的暴露表面和电介质层暴露的侧壁的电介质层上形成阻挡层。 在阻挡层上形成一个铜导体,并且填充沟槽中的窄孔。 通过CMP工艺从铜表面蚀刻掉材料,在除了孔之外的电介质层之上的阻挡层上方,降低铜,从而留下薄的铜层。 通过将选自硅和锗的元素与铜的暴露表面上的铜组合形成铜钝化,在铜和化合物之间的较窄的孔中形成界面,位于电介质顶层之下。 从铜化合物的表面和阻挡层的表面蚀刻掉材料,以通过蚀刻到电介质顶层来平面化铜化合物,留下在较窄的孔中覆盖铜导体的铜钝化化合物的薄层。