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Patent Searching and Data


Title:
CAPACITOR AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2004134579
Kind Code:
A
Abstract:

To solve a problem that the satisfaction of a high dielectric constant, a small leakage current and a temperature depending property for the same is required by a capacitance insulating film employed for the capacitor of a DRAM (dynamic random access memory).

A lower electrode 17 is formed in an opening unit 16 so that a TiN (titanium nitride) film on an interlayer silicon oxide film 15 remains in the opening unit 16 only and, subsequently, a lamination film of ZrXHf1-XO2 film (here; 0≤X≤1) 18 and a metal oxide film 19 containing Ti is employed as the capacitance insulating film, and residual carbon in the capacitance insulating film is removed by annealing in an oxidative atmosphere to form a capacitance film low in the leakage current in addition to the dielectric constant whereby the capacitor optimum for the DRAM is provided.


Inventors:
IIZUKA TOSHIHIRO
YAMAMOTO ASAE
Application Number:
JP2002297612A
Publication Date:
April 30, 2004
Filing Date:
October 10, 2002
Export Citation:
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Assignee:
NEC ELECTRONICS CORP
International Classes:
H01L21/316; H01L21/02; H01L21/20; H01L21/8242; H01L27/108; (IPC1-7): H01L21/8242; H01L21/316; H01L27/108
Attorney, Agent or Firm:
Tatsuo Tokumaru