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    • 43. 再颁专利
    • Process to manufacture crown stacked capacitor structures with
HSG-rugged polysilicon on all sides of the storage node
    • 在存储节点的所有侧面上制造具有HSG-坚固的多晶硅的冠层叠电容器结构的工艺
    • USRE36786E
    • 2000-07-18
    • US585402
    • 1996-01-11
    • Pierre FazanViju Mathews
    • Pierre FazanViju Mathews
    • H01L21/02H01L21/8242
    • H01L27/10852H01L28/82H01L28/84H01L28/90Y10S438/964
    • The present invention develops a container capacitor by forming a first insulative layer over conductive word lines; forming an opening between neighboring conductive word lines; forming a conductive plug between neighboring parallel conductive word lines; forming a planarized blanketing second insulating layer over the first insulative layer and the conductive plug; forming an opening into the second insulating layer, the opening thereby forming a container shape; forming a conductive spacer adjacent the wall of the container form, the conductive spacer having inner and outer surfaces; removing the second insulating layer, thereby exposing the outer surface of the conductive spacer; forming a layer of hemispherical grained conductive material superjacent the inner and outer surfaces of the conductive spacer; forming insulating spacers adjacent the inner and outer surfaces of the hemispherical grained conductive material; patterning the hemispherical grained conductive material to form a separate conductive container structure serving as a first capacitor cell plate; removing the insulating spacers; forming a capacitor cell dielectric layer adjacent and coextensive the conductive container structure and the first insulating layer; and forming a second conductive layer superjacent and coextensive the capacitor cell dielectric layer, the second conductive layer forming a second capacitor cell plate. The process of the present invention can be further modified to form a DRAM double container capacitor storage cell.
    • 本发明通过在导电字线上形成第一绝缘层来开发容器电容器; 在相邻的导电字线之间形成开口; 在相邻的平行导电字线之间形成导电插塞; 在所述第一绝缘层和所述导电插塞上形成平坦化的覆盖第二绝缘层; 在第二绝缘层中形成开口,由此形成容器形状; 在所述容器形式的壁上形成导电间隔物,所述导电间隔物具有内表面和外表面; 去除第二绝缘层,从而暴露导电间隔物的外表面; 在导电间隔物的内表面和外表面之上形成半球状粒状导电材料层; 形成邻近所述半球形颗粒导电材料的内表面和外表面的绝缘间隔物; 图案化半球状粒状导电材料以形成用作第一电容器单元板的单独的导电容器结构; 去除绝缘垫片; 形成与所述导电容器结构和所述第一绝缘层相邻并共同延伸的电容器单元电介质层; 以及形成第二导电层,所述第二导电层位于所述电容器电介质层的上方并共同延伸,所述第二导电层形成第二电容器单元板。 可以进一步修改本发明的方法以形成DRAM双容器电容器存储单元。
    • 45. 发明授权
    • High dielectric constant capacitor and method of manufacture
    • 高介电常数电容器及其制造方法
    • US5335138A
    • 1994-08-02
    • US17385
    • 1993-02-12
    • Gurtej SandhuPierre Fazan
    • Gurtej SandhuPierre Fazan
    • H01L21/02H01L27/108H01G1/01H01L27/00
    • H01L28/55H01L27/10808H01L28/60H01L28/75
    • A high storage capacity capacitor for a semiconductor structure includes a barrier layer formed on a polysilicon electrode, a lower electrode, a dielectric layer, and an upper electrode. The dielectric material is formed of a high dielectric constant material such as BaSrTiO.sub.3. In order to protect the barrier layer from oxidation during deposition of the dielectric layer and to provide a smooth surface geometry for depositing the dielectric layer, conducting or insulating spacers are formed on the sidewalls of the barrier layer and lower electrode. A smooth dielectric layer can thus be formed that is less susceptible to current leakage. In addition, the insulating spacers can be formed to completely fill a space between adjacent capacitors and to provide a completely planar surface.
    • 用于半导体结构的高存储容量电容器包括形成在多晶硅电极,下电极,电介质层和上电极上的阻挡层。 介电材料由高介电常数材料如BaSrTiO3形成。 为了在沉积介电层期间保护阻挡层不被氧化,并且为了沉积电介质层提供平滑的表面几何形状,在阻挡层和下电极的侧壁上形成导电或绝缘间隔物。 因此可以形成较不易受电流泄漏影响的平滑介电层。 此外,绝缘间隔物可以形成为完全填充相邻电容器之间的空间并提供完全平坦的表面。