Semiconductor chip with gate dielectrics for high-performance and low-leakage applications
First Claim
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1. An integrated circuit comprising:
- a substrate;
a first transistor having a first gate dielectric with a first oxide equivalent thickness, comprising an ultra-thin gate dielectric formed on the substrate; and
a second transistor having a second gate dielectric with a second oxide equivalent thickness, comprising a high-permittivity dielectric material formed on the substrate, wherein the second oxide equivalent thickness is different than the first oxide equivalent thickness.
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Abstract
Both high performance and low leakage current devices can be formed on a single wafer without significant additional processing steps by the formation of an ultra-thin gate dielectric and a high-permittivity gate dielectric, respectively, in regions wherein switching speed and low leakage current, respectively, are desired. Logic and embedded memory regions can be performance optimized on the same integrated circuit.
54 Citations
17 Claims
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1. An integrated circuit comprising:
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a substrate;
a first transistor having a first gate dielectric with a first oxide equivalent thickness, comprising an ultra-thin gate dielectric formed on the substrate; and
a second transistor having a second gate dielectric with a second oxide equivalent thickness, comprising a high-permittivity dielectric material formed on the substrate, wherein the second oxide equivalent thickness is different than the first oxide equivalent thickness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated circuit comprising:
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a substrate;
a first region formed on the substrate, the first region having formed therein a plurality of first transistors, each of said plurality of first transistors including;
a first source region;
a first drain region;
a first channel region formed between the first source and first drain regions; and
a first gate electrode electrically separated from the first channel region by a first gate dielectric having a first oxide equivalent thickness, comprising a high permittivity dielectric material; and
a second region formed on the substrate, the second region having formed therein a plurality of first transistors, each of said plurality of second transistors including;
a second source region;
a second drain region;
a second channel region formed between the second source and second drain regions; and
a second gate electrode electrically separated from the second channel region by a second gate dielectric having a second oxide equivalent thickness, comprising an ultra-thin dielectric material, wherein the second oxide equivalent thickness is different than the first oxide equivalent thickness. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification