| 摘要 |
When a first wiring and/or a second wiring is formed, a connection portion is formed in the first wiring and/or the second wiring which covers a part of a lower electrode layer outside the memory cell array. An etching suppressing portion is formed above the connection portion. A contact hole is formed in which a portion under the etching suppressing portion reaches up to a connection potion, and the other portion reaches up to the lower electrode layer by performing etching to a laminated body in a range including the etching suppressing portion. The laminated body includes the insulating layer, the first wiring, a memory cell layer, the second wiring, and the etching suppressing portion. The contact layer is formed by burying a conductive material in the contact hole.
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