Method for fabricating storage electrode of dynamic random access memory cell
AssigneeHyundai Electronics Industries Co., Ltd.
InventorsSang H. Woo, Ha E. Jeon
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AssigneeHyundai Electronics Industries Co., Ltd.
InventorsSang H. Woo, Ha E. Jeon
Estimating the term…
A method for fabricating a storage electrode of a DRAM cell capable of preventing impurities from excessively moving from the storage electrode to diffusion regions. The storage electrode is formed by a double formation of polysilicon layers. An undoped polysilicon layer 11 is primarily deposited over the entire exposed surface of the resulting structure to a thickness corresponding to 40 to 50% of a predetermined thickness of the storage electrode. A doped polysilicon layer is secondarily deposited over the undoped polysilicon layer to a thickness corresponding to 60 to 50% of the predetermined thickness of the storage electrode. The doped polysilicon layer and the undoped polysilicon layer are subjected to a patterning so that predetermined portions thereof are removed so as to form the storage electrode.
A method for fabricating a DRAM cell, comprising the steps of:
Dependencies are inferred from the claim text.