Abstract: According to one embodiment, a semiconductor memory device includes a stacked body including a first stacked portion including lower conductive layers stacked in a first direction and including a first stairs portion having a first end portion stepwise processed, and a second stacked portion provided on an upper side of the first stacked portion and including upper conductive layers stacked in the first direction and including a second stairs portion located above the first stairs portion and having a second end portion stepwise processed, and a first lower contact passing through the second stairs portion and connected to a portion of a first lower conductive layer, the portion being included in the first stairs portion.

Abstract: (Problems) Providing a polymer, a composition and a molded article, which are inexpensive and have great chemical stability and high mechanical strength with no content of halogen elements and less environmental burden during disposal. (Means for Resolution) A copolymer containing at least two or more polymer segments, where at least one polymer segment contains a phosphoryl derivative represented by the following general formula (1) and at least one polymer segment never contains a phosphoryl derivative represented by the following general formula (1): (where R independently represents hydrocarbon, an aromatic ring, hydrogen, a metal ion or onium ion).