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    • 2. 发明授权
    • Method of planarizing a conductive plug situated under a ferroelectric capacitor
    • 平面化位于铁电电容器下方的导电插塞的方法
    • US06635528B2
    • 2003-10-21
    • US09741675
    • 2000-12-19
    • Stephen R. GilbertScott SummerfeltLuigi Colombo
    • Stephen R. GilbertScott SummerfeltLuigi Colombo
    • H01L2100
    • H01L21/32139H01L21/76832H01L21/76834H01L21/7684H01L21/76849H01L21/7687H01L21/76877H01L27/11502H01L27/11507H01L28/55
    • An embodiment of the instant invention is a method of fabricating a planar conductive via in an opening through a dielectric layer having a top surface, a bottom surface and the opening having sides, the method comprising the steps of: depositing a first conductive material (114 of FIG. 7d) on the top surface of the dielectric layer and in the opening in the dielectric layer to substantially fill the opening with the conductive material; removing the portion of the first conductive material located on the dielectric layer and removing a portion of the first conductive material located in the opening in the dielectric layer to recess (406 of FIG. 7d) the first conductive material below the top surface of the dielectric layer; depositing a second conductive material (704 of FIG. 7d) in the recess to form a substantially planar top surface substantially coplanar with the top surface of the dielectric layer; and forming a third conductive material (302 of FIG. 7d) on the second conductive material, at least one of the second conductive material and the third conductive material acting as a diffusion barrier to prevent oxidation of the first conductive material.
    • 本发明的一个实施例是一种在具有顶表面,底表面和开口具有侧面的电介质层的开口中制造平面导电通孔的方法,所述方法包括以下步骤:将第一导电材料(114 在电介质层的顶表面和电介质层的开口中,以基本上用导电材料填充开口; 去除位于电介质层上的第一导电材料的部分,并且去除位于电介质层中的开口中的第一导电材料的一部分以凹陷(图7d的406)第一导电材料在电介质顶表面下方 层; 在凹槽中沉积第二导电材料(图7d的704)以形成与介电层的顶表面基本上共面的基本平坦的顶表面; 以及在所述第二导电材料上形成第三导电材料(图7d的302),所述第二导电材料和所述第三导电材料中的至少一个用作扩散阻挡层以防止所述第一导电材料的氧化。
    • 9. 发明授权
    • Method of fabricating a ferroelectric memory cell
    • 制造铁电存储单元的方法
    • US06548343B1
    • 2003-04-15
    • US09702985
    • 2000-10-31
    • Scott R. SummerfeltTheodore S. MoiseGuoqiang XingLuigi ColomboTomoyuki SakodaStephen R. GilbertAlvin L. S. LokeShawming MaRahim KavariLaura Wills-MirkarimiJun Amano
    • Scott R. SummerfeltTheodore S. MoiseGuoqiang XingLuigi ColomboTomoyuki SakodaStephen R. GilbertAlvin L. S. LokeShawming MaRahim KavariLaura Wills-MirkarimiJun Amano
    • H01L218242
    • H01L27/11502H01L27/11507H01L28/57
    • An embodiment of the instant invention is a method of fabricating a ferroelectric capacitor which is situated over a structure, the method comprising the steps of: forming a bottom electrode on the structure (124 of FIG. 1), the bottom electrode having a top surface and sides; forming a capacitor dielectric (126 of FIG. 1) comprised of a ferroelectric material on the bottom electrode, the capacitor dielectric having a top surface and sides; forming a top electrode (128 and 130 of FIG. 1) on the capacitor dielectric, the top electrode having a top surface and sides, the ferroelectric capacitor is comprised of the bottom electrode, the capacitor dielectric, and the top electrode; forming a barrier layer (118 and 120 of FIG. 1) on the side of the bottom electrode, the side of the capacitor dielectric, and the side of the top electrode; forming a dielectric layer on the barrier layer and the structure, the dielectric having a top surface and a bottom surface; and performing a thermal step for a duration at a temperature between 400 and 900 C. in an ambient comprised of a gas selected from the group consisting of: argon, nitrogen, and a combination thereof, the step of performing a thermal step being performed after the step of forming the barrier layer.
    • 本发明的一个实施例是制造位于结构上方的铁电电容器的方法,所述方法包括以下步骤:在所述结构(图1的124)上形成底电极,所述底电极具有顶表面 和边; 在底部电极上形成由铁电材料构成的电容器电介质(图1的126),电容器电介质具有顶表面和侧面; 在电容器电介质上形成顶电极(图1的128和130),顶电极具有顶表面和侧面,铁电电容器由底电极,电容器电介质和顶电极组成; 在底电极侧,电容器电介质侧和顶电极侧形成阻挡层(图1的118和120); 在所述阻挡层和所述结构上形成电介质层,所述电介质具有顶表面和底表面; 并且在由选自氩,氮及其组合的气体组成的环境中在400-900℃的温度下进行热步骤,所述环境包括:在步骤 形成阻挡层的步骤。