Method for Fabricating a DRAM Capacitor
    11.
    发明申请
    Method for Fabricating a DRAM Capacitor 审中-公开
    制造DRAM电容器的方法

    公开(公告)号:US20130161789A1

    公开(公告)日:2013-06-27

    申请号:US13738914

    申请日:2013-01-10

    CPC classification number: H01L28/40 H01L28/60 H01L28/65 H01L29/92

    Abstract: A method for fabricating a dynamic random access memory (DRAM) capacitor stack is disclosed wherein the stack includes a first electrode, a dielectric layer, and a second electrode. The first electrode is formed from a conductive binary metal. A dielectric layer is formed over the first electrode. The dielectric layer is subjected to a milliseconds anneal process that serves to crystallize the dielectric material and decrease the concentration of oxygen vacancies.

    Abstract translation: 公开了一种用于制造动态随机存取存储器(DRAM)电容器堆叠的方法,其中堆叠包括第一电极,电介质层和第二电极。 第一电极由导电二元金属形成。 在第一电极上形成电介质层。 对电介质层进行几毫秒的退火工艺,以使介电材料结晶并降低氧空位的浓度。

    Method for Fabricating a DRAM Capacitor
    12.
    发明申请
    Method for Fabricating a DRAM Capacitor 有权
    制造DRAM电容器的方法

    公开(公告)号:US20130154057A1

    公开(公告)日:2013-06-20

    申请号:US13738794

    申请日:2013-01-10

    Abstract: A method for fabricating a dynamic random access memory (DRAM) capacitor stack is disclosed wherein the stack includes a first electrode, a dielectric layer, and a second electrode. The first electrode is formed from a conductive binary metal compound and the conductive binary metal compound is annealed in a reducing atmosphere to promote the formation of a desired crystal structure. The binary metal compound may be a metal oxide. Annealing the metal oxide (i.e. molybdenum oxide) in a reducing atmosphere may result in the formation of a first electrode material (i.e. MoO2) with a rutile-phase crystal structure. This facilitates the formation of the rutile-phase crystal structure when TiO2 is used as the dielectric layer. The rutile-phase of TiO2 has a higher k value than the other possible crystal structures of TiO2 resulting in improved performance of the DRAM capacitor.

    Abstract translation: 公开了一种用于制造动态随机存取存储器(DRAM)电容器堆叠的方法,其中堆叠包括第一电极,电介质层和第二电极。 第一电极由导电二元金属化合物形成,并且导电二元金属化合物在还原气氛中退火以促进所需晶体结构的形成。 二元金属化合物可以是金属氧化物。 在还原气氛中退火金属氧化物(即氧化钼)可导致形成具有金红石相晶体结构的第一电极材料(即MoO 2)。 当使用TiO 2作为电介质层时,这有助于金红石相晶体结构的形成。 TiO 2的金红石相具有比其他可能的TiO 2晶体结构更高的k值,从而改善了DRAM电容器的性能。

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