Abstract: A coil component includes a core including a winding core portion and a pair of flange portions provided at both ends of the winding core portion, electrode portions provided in the flange portions, a wire wound around the winding core portion, and a magnetic plate fixed to the flange portions. The magnetic plate includes an annular first planar portion, a second planar portion that is located inside the inner circumference of the first planar portion and has a step between the first and the second planar portions, and a connection surface portion connecting the inner circumference of the first planar portion to the outer circumference of the second planar portion. The connection surface portion is configured by annularly disposing at least three slopes inclined with respect to the direction orthogonal to the first planar portion and has chamfered portions each being disposed between adjacent slopes.

Abstract: A coil component includes a drum core including a winding core portion and first and second flange portions, and first and second wires. A portion of the first wire that first comes into contact with an outer peripheral surface of the winding core portion when the first wire is traced from a first wire end to a second wire end is defined as a 1.0 turn portion of the first wire. A portion of the second wire where an angular position thereof about a central axis first coincides with an angular position of the 1.0 turn portion of the first wire, on a side of a second negative direction with respect to the central axis, when the second wire is traced from a first wire end to a second wire end is defined as a 1.0 turn portion of the second wire.

Abstract: A coil component includes a drum core including a winding core portion extending in a first direction and a pair of flange portions provided at both ends of the winding core portion. At least one flange of the pair of flange portions has at least one step or gradient portion. A terminal electrode is provided on the step or gradient portion, and a wire is wound around the winding core portion with an end bonded to the terminal electrode. The terminal electrode includes plural metal layers, an outermost layer of which is an Sn film having a flattened mounting surface. The flattened mounting surface overlaps the step or gradient portion when seen in a second direction perpendicular to the first direction.

Abstract: A coil component includes a drum core that includes a winding core portion and a pair of flange portions formed at the ends of the winding core portion, electrodes that are included in the pair of flange portions, and first and second wires that are wound around the winding core portion and that include extended portions electrically connected to the electrodes. The flange portions are continuous with the winding core portion and have slopes that guide the extended portions to the electrodes.

Abstract: A coil component includes a drum core, a first wire, and a second wire. The drum core includes a winding core, a first flange, and a second flange. The first wire includes a first winding portion. The second wire includes a second winding portion. When the second wire is traced from the end at the first flange toward the second flange, a specific position is a position at which the second wire comes into first contact with an outward-facing part of the first wire, and a specific turn is a turn of the second wire that is wound around from the specific position so as to proceed toward the second flange. The second winding portion has, within the specific turn, two intersections at which the second wire intersects the first wire.

Abstract: A coil component includes a core including a winding core portion and a pair of flange portions provided at both ends of the winding core portion, electrode portions provided in the flange portions, a wire wound around the winding core portion, and a magnetic plate fixed to the flange portions. The magnetic plate includes an annular first planar portion, a second planar portion that is located inside the inner circumference of the first planar portion and has a step between the first and the second planar portions, and a connection surface portion connecting the inner circumference of the first planar portion to the outer circumference of the second planar portion. The connection surface portion is configured by annularly disposing at least three slopes inclined with respect to the direction orthogonal to the first planar portion and has chamfered portions each being disposed between adjacent slopes.

Abstract: A coil component includes a drum core that includes a winding core portion and a pair of flange portions formed at the ends of the winding core portion, electrodes that are included in the pair of flange portions, and first and second wires that are wound around the winding core portion and that include extended portions electrically connected to the electrodes. The flange portions are continuous with the winding core portion and have slopes that guide the extended portions to the electrodes.

Abstract: According to one embodiment, a memory system includes a nonvolatile memory and a controller. The controller is communicable with a host and is configured to control the nonvolatile memory. The controller is configured to when receiving a key generation command from the host, generate an encryption key by an encrypting and decrypting function unit, store the encryption key in the nonvolatile memory, and transmit an identifier of the encryption key to the host.

Abstract: A drum-like core of a coil component includes a winding core portion, a flange portion, and a terminal electrode formed on a mounting surface of the flange portion. The mounting surface of the flange portion includes a flat region and a lower region. The terminal electrode has a flat surface, the flat surface being parallel with the length direction in an outer surface of the terminal electrode, covering the mounting surface of the flange portion, and being longer than the flat region in maximum measurement extending in parallel with the length direction.

Abstract: A flange portion includes a projecting surface that is positioned in a leading end of a projection projecting toward a mounting substrate and that faces the mounting substrate, and a principal surface that extends in a direction crossing the projecting surface and that faces a direction in which the pair of flange portions are aligned. A metal terminal includes a mounting portion opposed to the projecting surface and an end surface portion opposed to the principal surface. An angle ? between the mounting portion and the end surface portion satisfies the relationship 85 degrees??<90 degrees. The angle ? between the mounting portion and the end surface portion is smaller than an angle ?1 between the projecting surface and the principal surface.

Abstract: A coil component includes a core including a core body, first and second flanges at first and second ends, respectively, of the body; first and second outer electrodes on the first and second flanges, respectively; and a wire wound around the body and electrically connected to the electrodes. The body has a peripheral face extending in a peripheral direction about an axis of the body. In a section containing the axis, a distance between at least a part of the face and the axis is smaller on a side near a center of the body in a direction of the axis than on a side near each of the first and second ends while a distance between the wire and the axis is smaller on the side near the center in the direction of the axis than on the side near each of the first and second ends.

Abstract: A memory system includes a nonvolatile memory and a controller configured to control the nonvolatile memory. The controller is configured to construct a relational database, to store the relational database in the nonvolatile memory, to write data into the relational database, and to read data from the relational database, in response to relational database commands received from a host.

Abstract: A memory system is communicable with a plurality of hosts. The memory system includes a nonvolatile memory and a controller electrically connected to the nonvolatile memory. The controller receives an authentication request command from a first host, and transmits a first authentication code when authentication of the first host is successful. The controller receives an access command, which includes a second authentication code, for accessing the nonvolatile memory from a second host. The controller permits an access to the nonvolatile memory in accordance with the access command when the second authentication code matches the first authentication code, and prohibits an access to the nonvolatile memory in accordance with the access command when the second authentication code is different from the first authentication code.

Abstract: A communication system includes a host, and a memory system including a non-volatile memory and a controller configured to execute operations including writing of data to the non-volatile memory based on a request from the host. Information is transmitted by one of the host or the memory system after a predetermined period has elapsed while power is supplied from the host to the non-volatile memory. The information includes a number for identifying either the host or the memory system that transmitted the information and diagnostic information used for determining if there is a risk of loss of data stored in the non-volatile memory.

Abstract: A coil component includes a core that has a columnar winding core portion and a flange formed at an end of the winding core portion in an axial direction. The coil component also includes a terminal electrode formed at an end surface of the flange and a wire being wound around the winding core portion with one end portion coupled to the terminal electrode. The flange protrudes toward the first end of the coil component in the first direction. A curved surface and an inclined surface are formed at a boundary between a surface of the flange and a peripheral surface of the winding core portion. The inclined surface has a curvature smaller than that of the curved surface. In addition, the inclined surface is disposed where the wire intersects the boundary as viewed in the first direction.

Abstract: A coil component includes a core having a winding core portion and one pair of guard portions, a terminal electrode provided on each guard portion, and a wire wound around the winding core portion and having both ends electrically connected to the terminal electrodes. Each guard portion has an inner end face, an outer end face, a bottom surface, a top surface, and two side surfaces. Each terminal electrode has a bottom surface electrode portion continuous over at least the bottom surface and an outer end face electrode portion on the outer end face. The bottom surface electrode portion has a side surface extension portion located lower than a lowest portion of the winding core portion. The outer end face electrode portion is connected to the bottom surface electrode portion, and both end edges of the outer end face electrode portion are located away from both the side surfaces.

Abstract: A coil component includes a core including a winding core portion and a pair of flange portions provided at both ends of the winding core portion, electrode portions provided in the flange portions, a wire wound around the winding core portion, and a magnetic plate fixed to the flange portions. The magnetic plate includes an annular first planar portion, a second planar portion that is located inside the inner circumference of the first planar portion and has a step between the first and the second planar portions, and a connection surface portion connecting the inner circumference of the first planar portion to the outer circumference of the second planar portion. The connection surface portion is configured by annularly disposing at least three slopes inclined with respect to the direction orthogonal to the first planar portion and has chamfered portions each being disposed between adjacent slopes.

Abstract: A bent shape that projects when viewed in an axis direction of a winding core part is given to each top surface of a first flange part and a second flange part of a drum-like core. The top surface and a lower principal surface of a plate-like core are closest to each other in a portion where a vertex of the bent shape is positioned.

Abstract: A coil component includes a drum-shaped core including a core portion that extends in a length direction of the coil component and a first flange portion provided on a first end portion of the core portion, and first and second terminal electrodes provided on the first flange portion. The first and second terminal electrodes each include a base electrode formed on a surface of the first flange portion and a plating layer that covers the base electrode. The base electrode includes a bottom-surface base electrode portion on a bottom surface, an end-surface base electrode portion on an end surface, and a side-surface base electrode portion on a first side surface. The end-surface base electrode portion has a height greater than that of the first crotch portion. The side-surface base electrode portion has a height less than that of the first crotch portion.

Abstract: A communication system includes a host, and a memory system including a non-volatile memory and a controller configured to execute operations including writing of data to the non-volatile memory based on a request from the host. Information is transmitted by one of the host or the memory system after a predetermined period has elapsed while power is supplied from the host to the non-volatile memory. The information includes a number for identifying either the host or the memory system that transmitted the information and diagnostic information used for determining if there is a risk of loss of data stored in the non-volatile memory.