Semiconductor device and manufacturing method therefor
First Claim
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1. A semiconductor device comprising:
- a semiconductor substrate; and
a ferroelectric capacitor comprising;
a ferroelectric film formed over said semiconductor substrate, said ferroelectric film being constituted of a substance of which chemical formula is expressed by ABO3, added with La and Nb;
a first top electrode film formed on said ferroelectric film, said first top electrode film including an oxide of Ir, anda second top electrode film formed on said first top electrode film, said second top electrode film including Ir,wherein an oxygen composition of said first top electrode film is smaller than that of said second top electrode film.
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Abstract
A ferroelectric capacitor having a bottom electrode (9a), a ferroelectric film (10a) and a top electrode (11a) is formed above a semiconductor substrate (1). The ferroelectric film (10a) is constituted of CSPZT with 0.1-5 mol % of La and 0.1-5 mol % of Nb.
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20 Claims
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1. A semiconductor device comprising:
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a semiconductor substrate; and a ferroelectric capacitor comprising; a ferroelectric film formed over said semiconductor substrate, said ferroelectric film being constituted of a substance of which chemical formula is expressed by ABO3, added with La and Nb; a first top electrode film formed on said ferroelectric film, said first top electrode film including an oxide of Ir, and a second top electrode film formed on said first top electrode film, said second top electrode film including Ir, wherein an oxygen composition of said first top electrode film is smaller than that of said second top electrode film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A manufacturing method of a semiconductor device comprising the step of:
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forming a ferroelectric capacitor above a semiconductor substrate, said ferroelectric capacitor comprising a ferroelectric film, a first top electrode film formed on said ferroelectric film, said first top electrode film including an oxide of Ir, and a second top electrode film formed on said first top electrode film, said second top electrode film including Ir, wherein said ferroelectric film is constituted of a substance of which chemical formula is expressed by ABO3, added with La and Nb, wherein an oxygen composition of said first top electrode film is smaller than that of said second top electrode film. - View Dependent Claims (17, 18, 19, 20)
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Specification