Abstract: Provided is a case for a secondary battery accommodating an electrode assembly, including a lower member, an upper member disposed above the lower member, and a sealing part to which the lower member and the upper member are fused to seal the case. The sealing part includes a first sealing part in which an electrode terminal connected to the electrode assembly exists and a second sealing part which is a remaining area except for the first sealing part. The case includes a polymer resin layer formed on an edge of the first sealing part and a reinforcing layer surrounding the polymer resin layer. The case for a secondary battery has improved water resistance, insulation and mechanical properties. Also provided is a secondary battery, a module, and a device including the same.

Abstract: According to an embodiment of the present disclosure, there are provided a pouch-type secondary battery, including an electrode assembly, and a pouch film including an accommodating part in which the electrode assembly is disposed and a sealing part formed by fusion of edges of the accommodating part, wherein the sealing part includes a pattern sealing part on one or more sides among four sides of the pouch-type secondary battery, and the pattern sealing part includes a plurality of sealings provided with one or more discontinuous parts, and a battery module including the pouch-type secondary battery as a unit cell.

Abstract: A three-dimensional semiconductor device includes gate electrodes including pad regions sequentially lowered by a first step portion in a first direction and sequentially lowered by a second step portion in a second direction perpendicular to the first direction, the second step portion being lower than the first step portion, wherein a length of a single pad region among pad regions sequentially lowered by the second step portion in the second direction is less than a length of a remainder of the pad regions in the second direction.

Abstract: A three-dimensional semiconductor device includes gate electrodes including pad regions sequentially lowered by a first step portion in a first direction and sequentially lowered by a second step portion in a second direction perpendicular to the first direction, the second step portion being lower than the first step portion, wherein a length of a single pad region among pad regions sequentially lowered by the second step portion in the second direction is less than a length of a remainder of the pad regions in the second direction.

Abstract: A three-dimensional semiconductor device includes gate electrodes including pad regions sequentially lowered by a first step portion in a first direction and sequentially lowered by a second step portion in a second direction perpendicular to the first direction, the second step portion being lower than the first step portion, wherein a length of a single pad region among pad regions sequentially lowered by the second step portion in the second direction is less than a length of a remainder of the pad regions in the second direction.

Abstract: A three-dimensional semiconductor device includes gate electrodes including pad regions sequentially lowered by a first step portion in a first direction and sequentially lowered by a second step portion in a second direction perpendicular to the first direction, the second step portion being lower than the first step portion, wherein a length of a single pad region among pad regions sequentially lowered by the second step portion in the second direction is less than a length of a remainder of the pad regions in the second direction.

Abstract: A method of preparing a porous separator using cellulose nanofibrils is provided. The method includes preparing a sheet using a solution including cellulose nanofibrils and a pore-forming resin and removing the pore-forming resin included in the sheet to form micropores.