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US08853049B2 Single-sided non-noble metal electrode hybrid MIM stack for DRAM devices 有权
用于DRAM器件的单面非贵金属电极混合MIM堆叠

Single-sided non-noble metal electrode hybrid MIM stack for DRAM devices
Abstract:
A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of a first electrode that serves as a template for promoting the high k phase of a subsequently deposited first dielectric layer. The first high k dielectric layer comprises a doped material that can be crystallized after a subsequent annealing treatment. An amorphous, doped high k second dielectric material is form on the first dielectric layer. The dopant concentration and the thickness of the second dielectric layer are chosen such that the second dielectric layer remains amorphous after a subsequent annealing treatment. A second electrode layer compatible with the second dielectric layer is formed on the second dielectric layer.
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