Invention Grant
- Patent Title: Method for manufacturing ferroelectric capacitor
- Patent Title (中): 铁电电容器的制造方法
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Application No.: US12125418Application Date: 2008-05-22
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Publication No.: US07754501B2Publication Date: 2010-07-13
- Inventor: Tatsuhiro Urushido
- Applicant: Tatsuhiro Urushido
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2007-137685 20070524
- Main IPC: H01L21/00
- IPC: H01L21/00

Abstract:
A method for manufacturing a ferroelectric capacitor includes the steps of: forming a base dielectric film on a substrate, and forming a first plug conductive section in the base dielectric film at a predetermined position; forming, on the base dielectric film, a charge storage section formed from a lower electrode, a ferroelectric film and an upper electrode; forming a stopper film from an insulation material that covers the charge storage section; forming a hydrogen barrier film that covers the stopper film; forming an interlayer dielectric film on the base dielectric film including the hydrogen barrier film; forming, in the interlayer dielectric film, a first contact hole that exposes the first plug conductive section; forming a second contact hole that exposes the upper electrode of the charge storage section by successively etching the interlayer dielectric film, the hydrogen barrier film and the stopper film by using a resist pattern as a mask, and then removing the resist pattern by a wet cleaning treatment; forming an adhesion layer from a conductive material having hydrogen barrier property inside the second contact hole in a manner to cover an upper surface of the upper electrode; forming a second plug conductive section inside the first contact hole; and forming a third plug conductive section inside the second contact hole, wherein the stopper film is formed from a material having a lower etching rate for a cleaning liquid used for the wet cleaning treatment to remove the resist pattern than an etching rate of the hydrogen barrier film for the cleaning liquid.
Public/Granted literature
- US20080290385A1 METHOD FOR MANUFACTURING FERROELECTRIC CAPACITOR, AND FERROELECTRIC CAPACITOR Public/Granted day:2008-11-27
Information query
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