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    • 7. 发明授权
    • Polysilicon capacitor having large capacitance and low resistance
    • 具有大电容和低电阻的多晶硅电容器
    • US06858889B2
    • 2005-02-22
    • US09878117
    • 2001-06-08
    • James W. AdkissonJohn A. BracchittaJed H. RankinAnthony K. Stamper
    • James W. AdkissonJohn A. BracchittaJed H. RankinAnthony K. Stamper
    • H01L21/02H01L21/314H01L21/334H01L21/8242H01L29/78H01L33/00
    • H01L28/75H01L21/3144H01L28/91
    • A process for forming capacitors in a semiconductor device. In one embodiment, a first insulating layer is deposited on the semiconductor device; a trench is formed in the insulating layer; a first low resistance metal layer is formed covering the interior surface of the trench; a first polysilicon layer is formed over the first low resistance metal layer; a first dielectric layer is formed over the first polysilicon layer; a second polysilicon layer is formed over the first dielectric layer; a second low resistance metal layer is formed over the second polysilicon layer; a third polysilicon layer is formed over the second low resistance metal layer; a second dielectric layer is formed over the third polysilicon layer; a fourth polysilicon layer is formed over the second dielectric layer; a third low resistance metal layer is formed over the fourth polysilicon layer until the trench is filled; the semiconductor device is planarized until the first, second and third low resistance metal layers are exposed above the trench; finally, capacitor leads are formed to the first, second, and third low resistance metal layers.
    • 一种用于在半导体器件中形成电容器的工艺。 在一个实施例中,第一绝缘层沉积在半导体器件上; 在绝缘层中形成沟槽; 形成覆盖沟槽内表面的第一低电阻金属层; 在第一低电阻金属层上形成第一多晶硅层; 第一介电层形成在第一多晶硅层上; 在第一介电层上形成第二多晶硅层; 在第二多晶硅层上形成第二低电阻金属层; 在第二低电阻金属层上形成第三多晶硅层; 在所述第三多晶硅层上形成第二电介质层; 在第二介电层上形成第四多晶硅层; 第四低电阻金属层形成在第四多晶硅层上,直到沟槽被填充; 半导体器件被平坦化,直到第一,第二和第三低电阻金属层暴露在沟槽上方; 最后,对第一,第二和第三低电阻金属层形成电容器引线。
    • 8. 发明授权
    • Polysilicon capacitor having large capacitance and low resistance and process for forming the capacitor
    • 具有大电容和低电阻的多晶硅电容器和用于形成电容器的工艺
    • US06261895B1
    • 2001-07-17
    • US09225043
    • 1999-01-04
    • James W. AdkissonJohn A. BracchittaJed H. RankinAnthony K. Stamper
    • James W. AdkissonJohn A. BracchittaJed H. RankinAnthony K. Stamper
    • H01L218242
    • H01L28/75H01L21/3144H01L28/91
    • A process for forming capacitors in a semiconductor device. In one embodiment, a first insulating layer is deposited on the semiconductor device; a trench is formed in the insulating layer; a first low resistance metal layer is formed covering the interior surface of the trench; a first polysilicon layer is formed over the first low resistance metal layer; a first dielectric layer is formed over the first polysilicon layer; a second polysilicon layer is formed over the first dielectric layer; a second low resistance metal layer is formed over the second polysilicon layer; a third polysilicon layer is formed over the second low resistance metal layer; a second dielectric layer is formed over the third polysilicon layer; a fourth polysilicon layer is formed over the second dielectric layer; a third low resistance metal layer is formed over the fourth polysilicon layer until the trench is filled; the semiconductor device is planarized until the first, second and third low resistance metal layers are exposed above the trench; finally, capacitor leads are formed to the first, second, and third low resistance metal layers.
    • 一种用于在半导体器件中形成电容器的工艺。 在一个实施例中,第一绝缘层沉积在半导体器件上; 在绝缘层中形成沟槽; 形成覆盖沟槽内表面的第一低电阻金属层; 在第一低电阻金属层上形成第一多晶硅层; 第一介电层形成在第一多晶硅层上; 在第一介电层上形成第二多晶硅层; 在第二多晶硅层上形成第二低电阻金属层; 在第二低电阻金属层上形成第三多晶硅层; 在所述第三多晶硅层上形成第二电介质层; 在第二介电层上形成第四多晶硅层; 第四低电阻金属层形成在第四多晶硅层上,直到沟槽被填充; 半导体器件被平坦化,直到第一,第二和第三低电阻金属层暴露在沟槽上方; 最后,对第一,第二和第三低电阻金属层形成电容器引线。