Abstract: According to one embodiment, a memory device includes a first substrate and a second substrate. The first substrate is provided with a first circuit layer on a front surface. The first circuit layer includes a CMOS circuit. The second substrate has a front surface that faces the first substrate. The second substrate is provided with a second circuit layer on the front surface contacting the first circuit layer. The second substrate includes a memory circuit and transistors of a silicon-on-insulator (SOI) structure.

Abstract: Provided is electric power equipment that allows a battery to be installed and removed with ease. The electric power equipment (1) includes a main body (2) defining a battery receiving recess (40) having an open upper end, and a battery (20) configured to be received in the battery receiving recess, wherein an upper part of a front end part of the battery is provided with a projection (108) projecting in a forward direction, and a rear end part of the battery is provided with a grip, and wherein an upper edge of the front end part of the battery receiving recess is provided with a supporting surface (36) configured to support a lower surface of the projection at least when the battery is being removed from the battery receiving recess.

Abstract: Provided is electric power equipment that allows a battery to be installed and removed with ease. The electric power equipment (1) includes a main body (2) defining a battery receiving recess (40) having an open upper end, and a battery (20) configured to be received in the battery receiving recess, wherein an upper part of a front end part of the battery is provided with a projection (108) projecting in a forward direction, and a rear end part of the battery is provided with a grip, and wherein an upper edge of the front end part of the battery receiving recess is provided with a supporting surface (36) configured to support a lower surface of the projection at least when the battery is being removed from the battery receiving recess.

Abstract: A battery (20) of power equipment (1) is received in a battery receiving recess (40) of the power equipment. A lower front end of the battery is provided with an engagement portion (140) configured to be engaged by a rib (50) provided in a lower part of the front end of the battery receiving recess. A first sheet spring member (80) is provided in a rear part of a bottom surface of the battery receiving recess to urge the battery upward. A latch member (66) provided in a rear end part of the battery receiving recess engages a rear end of the battery against the spring force of the first sheet spring member.

Abstract: A battery 20 of power equipment 1 is received in a battery receiving recess 40 of the power equipment. A lower front end of the battery is provided with an engagement portion 136 configured to be engaged by a rib 50 provided in a lower part of the front end of the battery receiving recess. A first sheet spring member 80 is provided in a rear part of a bottom surface of the battery receiving recess to urge the battery upward. A latch member 66 provided in a rear end part of the battery receiving recess engages a rear end of the battery against the spring force of the first sheet spring member.