Samsung Electronics Co., Ltd.

Other

Rae Young Lee

Jae Duk Lee

Jin-Kyu Kang

Se Jun Park

Gu Yeon Han

Hye Ji Lee

A semiconductor memory device includes a source layer, a channel structure, gate electrodes on the source layer and spaced apart on a sidewall of the channel structure, and a common source line. The gate electrodes include a first word line group including first and second gate electrodes and a second word line group including third and fourth gate electrodes. The semiconductor memory device, in response to a voltage of the common source line reaching a target voltage, causes an inhibition voltage to be applied to the second word line group and an erase voltage to be applied to the first word line group in a first erase operation interval, and causes the inhibition voltage to be applied to the first word line group and the erase voltage to be applied to the second word line group in a second erase operation interval.

Semiconductor memory device and storage system including semiconductor memory device

A non-volatile memory device including: a memory cell array including non-volatile memory blocks connected to a plurality of word lines, a plurality of bit lines and a common source line; a common source line driver configured to supply a common source line voltage to the common source line; a page buffer unit configured to supply a bit line voltage to at least one of the plurality of bit lines; a control logic circuit configured to adjust the common source line voltage and the bit line voltage; and a channel initialization circuit, wherein the channel initialization circuit sets the common source line voltage and the bit line voltage to an initialization pulse, and the channel initialization circuit applies the initialization pulse between a plurality of read sections in which a read voltage is applied to at least two of the plurality of word lines.

Non-volatile memory device which utilizes a pulse applied to a bit line and/or a common source line between read operations to reduce noise

The present invention relates to a roller shutter in which a slat connection structure is very flexible so as to reduce manufacturing and maintenance costs. The roller shutter of the present invention comprises: a plurality of slats continuously connected in the vertical direction; a winding unit for winding or unwinding the plurality of slats in the vertical direction; a shutter box arranged above a door frame of a building; and a guide frame for guiding the edges of the plurality of slats. The winding unit is arranged inside the shutter box. The plurality of slats are connected in the vertical direction such that the slats can be pivoted. One end of each slat has a hook, and the hook is curved with a predetermined radius of curvature. The other end of each slat has an accommodation groove curved at a predetermined radius of curvature. The hook of one slat is accommodated in the accommodation groove of another slat adjacent to said slat such that the hook is movable in the circumferential direction, thus enabling said slat and the other slat adjacent thereto in the vertical direction to pivot relative to one another. The hook has an inner surface and an outer surface. The accommodation groove has a first inner surface, a second inner surface, a closed surface, and an opening. The radius of the second inner surface of the accommodation groove is larger than that of the first inner surface. The first inner surface extends in the circumferential direction so as to form a cylinder. The inner surface of the hook and the first inner surface of the accommodation groove have the same radius, and the outer surface of the hook and the second inner surface of the accommodation groove have the same radius.

Growing community of inventors

Suwon-si, South Korea

Rae Young Lee