Abstract: In an embodiment, an air-core coil 50 includes a winding part 54 formed by winding a coated conductive wire 52, wherein a pair of leader parts 56 and 58 is interposed between a second core 20 and a first core 40 which contain metal magnetic grains. A first gap 72 is provided between a principle face 50A of one end portion of the winding part 54 in the direction of a winding core axis of the winding part 54 and the first core member 40. A second gap 70 is provided between a principle face 50B of the other end portion and the second core member 20. The coil component is a small and high-performance coil component with a high dielectric withstanding voltage.
Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT located on the piezoelectric substrate and including a pair of comb-shaped electrodes facing each other, each of the pair of comb-shaped electrodes including a grating electrode exciting an acoustic wave and a bus bar to which the grating electrode is connected, wherein an anisotropy coefficient in a cross region where the grating electrodes of the pair of comb-shaped electrodes cross each other is positive; an anisotropy coefficient in a gap region located between a tip of the grating electrode of one of the pair of comb-shaped electrodes and the bus bar of the other is less than the anisotropy coefficient in the cross region, and an acoustic velocity of an acoustic wave propagating through the gap region is equal to or less than an acoustic velocity of an acoustic wave propagating through the cross region at an antiresonant frequency.
Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT that is located on the piezoelectric substrate and includes comb-shaped electrodes facing each other, each of the comb-shaped electrodes having grating electrode and a bus bar connected to the grating electrodes, a duty ratio of grating electrodes of the comb-shaped electrodes in a center region of an overlap region differing from a duty ratio of grating electrodes of the comb-shaped electrodes in an edge region of the overlap region in an arrangement direction of the grating electrodes, the grating electrodes of each of the comb-shaped electrodes overlapping with the grating electrodes of the other in the overlap region, a grating electrode of a first one of the comb-shaped electrodes in the center region having a different width from a grating electrode of a second one of the comb-shaped electrodes in the center region.
Abstract: A multi-layer ceramic electronic component includes: a ceramic body including first and second main surfaces oriented in a first axial direction, first and second end surfaces oriented in a second axial direction orthogonal to the first axial direction, a first internal electrode, and a second internal electrode, the ceramic body being formed to be long in a third axial direction orthogonal to the first and second axial directions; a first external electrode including a first cover portion and a first extension portion; and a second external electrode including a second cover portion and a second extension portion, the multi-layer ceramic electronic component satisfying that, when T1 represents a dimension of the ceramic body in the first axial direction, and when T2 represents a dimension of each of the first and second extension portions in the first axial direction, T1 is 80 ?m or less and T2/(T1+T2) is 0.32 or less.
Abstract: An electrochemical device is constituted by a positive electrode, a negative electrode, and separators that are wound in such a way that the first principal face of the negative electrode and third principal face of the positive electrode are on the inner side of winding, while the second principal face of the negative electrode and fourth principal face of the positive electrode are on the outer side of winding, with the separators separating the positive electrode and negative electrode; wherein the second principal face has a first region opposed to the positive electrode via the separator and a second region on the outermost side of winding and not opposed to the positive electrode, the second region includes a first uncoated region where no negative electrode active material layer is formed, and a metal lithium is joined to the first uncoated region and immersed in electrolytic solution.
Abstract: An electrochemical device has a positive-electrode terminal, a negative-electrode terminal, a first electrode body, a second electrode body, and electrolytic solution. The positive-electrode terminal is flat plate-shaped, and has a first principal face and a second principal face on the opposite side. The negative-electrode terminal is flat plate-shaped, and has a third principal face and a fourth principal face on the opposite side. The first electrode body has a first wound positive-electrode non-forming region and a first wound negative-electrode non-forming region. The second electrode body has a second wound positive-electrode non-forming region and a second wound negative-electrode non-forming region.
Abstract: An acoustic wave device includes: a Y-cut X-propagation lithium tantalate substrate having a cut angle of 20° or more and 48° or less; and a grating electrode that is composed of one or more metal films laminated on the substrate, and excites an acoustic wave, wherein when a density of each metal film in the one or more metal films is represented by ?i, a Poisson's ratio of each metal film is represented by Pi, a film thickness of each metal film is represented by hi, a density of Cu is represented by ?0, a Poisson's ratio of Cu is represented by P0 and a pitch is represented by ?, a total value of “(hi/?)×(?i/?0)×(Pi/P0)” for each metal film with respect to the one or more metal films is more than 0.08.
Abstract: A multilayer ceramic capacitor includes: a multilayer structure having an internal electrode and a dielectric layer alternately stacked; external electrodes provided on a first and second faces of the multilayer structure, wherein t12×L1/N is equal to or more than 0.1, when a distance between a first edge positioned at outermost of edges of the plurality of internal electrodes that are not connected to the first external electrode or the second external electrode in an array direction of the first external electrode and the second external electrode and a second edge positioned at innermost of edges of the plurality of internal electrodes that are not connected to the first external electrode or the second external electrode in the array direction is L1 (mm), each thickness of the plurality of dielectric layers is t1 (?m), and a stack number of the plurality of dielectric layers is N.
Abstract: An acoustic wave device includes: a piezoelectric substrate; and a pair of comb-shaped electrodes that is located on the piezoelectric substrate, includes a metal film, and excites a surface acoustic wave, the metal film being mainly composed of a metal having a melting point equal to or higher than a melting point of Pt, the metal film having a first region in which a crystal grain has a columnar shape and a second region that is located on and/or under the first region in a stacking direction and has less crystallinity than the first region or has an amorphous structure.
Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers including a co-material are alternately stacked, wherein a Mo concentration in the co-material is smaller than that in a ceramic grain in the ceramic dielectric layer.
Abstract: The present disclosure includes: a flexible resin substrate made of a polyimide resin; an adhesion layer provided on the resin substrate; a semiconductor element mounted face down to the resin substrate and fixed to the resin substrate through the adhesion layer; a via hole provided in the resin substrate to correspond to an element electrode of the semiconductor element; a module electrode provided to the resin substrate to be in contact with the element electrode of the semiconductor element through the via hole; a protruding portion provided, around the element electrode or in a peripheral edge portion of the semiconductor element, on a surface of the semiconductor element; and an escape portion for the adhesion layer covering a head portion of the protruding portion to escape, the escape portion being provided in a region, of the resin substrate, corresponding to the protruding portion.
Abstract: An electric double-layer capacitor contains an electrolytic solution, wherein the electrolytic solution comprises 1.2 to 1.8 mol/L of spirobipyrrolidinium tetrafluoroborate as electrolyte as well as solvent, where the solvent contains 50 to 60 percent by volume of propylene carbonate, 30 to 36 percent by volume of dimethyl carbonate, and 4 to 20 percent by volume of ethyl methyl carbonate. The electric double-layer capacitor can maintain its initial high capacitance and low internal resistance, while undergoing smaller characteristic changes after being exposed to low-temperature environments, high-voltage environments or high-temperature environments.
Abstract: An electronic component package includes: an electronic component that includes a body, the body having a first main surface that is convexly curved along a longitudinal direction, and a second main surface that is concavely curved along the longitudinal direction, a distance between the first main surface and the second main surface being 50 ?m or less; a housing portion that includes a plurality of recesses, each of the recesses including a take-out opening and housing the electronic component with the first main surface facing toward the take-out opening; and a sealing portion that covers the take-out openings of the plurality of recesses.
Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a first external electrode 12 and a second external electrode 13 that each contain metal grains MP and dielectric grains DP, where an oxide of the same metal element constituting the metal grain MP, or MO, is present at the interface between the metal grain MP and the dielectric grain DP. The multilayer ceramic capacitor can prevent the hardness of its external electrodes from dropping, even when the external electrodes contain metal grains and dielectric grains.
Abstract: In an embodiment, a coil component 10 has a drum core 20 housed in a through hole 32 of a ring core 30, and two types of securing parts are provided in a gap G between an outer circumference of one flange part 24 of the drum core 20 and an inner circumference of the through hole 32. Terminal electrodes 50A, 50B connecting to ends 46A, 46B pulled out from a winding wire 40 wound around the drum core 20 are assembled to the ring core 30. Second securing parts 60A, 60B are arranged to opposite to each other with respect to a center C of the flange part 24, and first securing parts 62A, 62B are provided to cover an outer side of the second securing parts 60A, 60B. A hardness of the second securing part is higher than that of the first securing part.
Abstract: An electronic component according one embodiment of the disclosure includes an insulator, an internal conductor, and an external electrode. The insulator may be formed of a material that contains resin. The internal conductor is provided inside the insulator and includes a conductive main body and an outer coating film that is provided on at least a part of a peripheral surface of the conductive main body and has a resistivity higher than the conductive main body. The external electrode is disposed on the insulator and electrically coupled to the internal conductor.
January 23, 2017
Date of Patent:
June 4, 2019
TAIYO YUDEN CO., LTD.
Tsuyoshi Ogino, Takayuki Sekiguchi, Koji Otsuka
Abstract: In an embodiment, a multilayer ceramic capacitor 10 is such that: the two first base conductor films 11c, and the supplementary dielectric layer 11d, on each of both height-direction faces of the capacitive element 11?, are connected to each other based on mutual bonding of the dielectric particles contained in each of them; the two first base conductor films 11c on each of both height-direction faces of the capacitive element 11?, and the capacitive element 11?, are connected to each other based on mutual bonding of the dielectric particles contained in each of them; and the supplementary dielectric layer 11d on each of both height-direction faces of the capacitive element 11?, are the capacitive element 11?, are connected to each other based on mutual bonding of the dielectric particles contained in each of them.
September 7, 2017
Date of Patent:
May 28, 2019
TAIYO YUDEN CO., LTD.
So Sato, Yoshiaki Iijima, Takashi Sasaki
Abstract: A ceramic electronic component includes a ceramic body and external electrodes. The ceramic body includes ceramic layers formed of a ceramic material and laminated in a first axis direction, and internal electrode layers each including an extracted portion and disposed between the ceramic layers, the extracted portion being extracted to a circumference of each of the ceramic layers and having a width of 100 ?m or less along the circumference. The external electrodes contain the ceramic material, the external electrodes being provided to a surface of the ceramic body and each connected to the extracted portion.
Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a first metal layer 14 having many holes 14a, and a second metal layer 15 having many holes 15a, with a clearance CL provided in between in the length direction, on the other height-direction side face of the capacitor body; the first metal layer 14 is partially covered by a third part 12c of a first external electrode 12, while the remainder is exposed; and the second metal layer 15 is partially covered by a third part 13c of a second external electrode 13, while the remainder is exposed. The multilayer ceramic capacitor can have excellent heat dissipation property.
Abstract: An electrochemical device electrode has a current collector, alkalescent resin layers, conductive layers, and active material layers. The current collector is an acid-etched metal foil whose surface has concavities. The alkalescent resin layers are formed and desiccated inside the concavities and exhibit weak alkalinity. The conductive layers are formed on the current collector and the alkalescent resin layers, contain conductive material, and are electrically connected to the current collector. The active material layers are formed on the conductive layers.