Abstract: A wiring substrate includes a substrate body composed of a plurality of ceramic layers (insulating materials) and having a front surface and a back surface located on opposite sides thereof and having a side surface located between the front surface and the back surface. The outline of the substrate body in a plan view which is a view from the front surface side is composed of a plurality of curved portions separated from one another and a plurality of straight portions each located between adjacent ones of the curved portions. The total length of the curved portions in the plan view is at least 40% of the sum of the total length of the curved portions and the total length of the straight portions.

Abstract: A thermoelectric element-containing package according to one aspect of the present disclosure includes a thermoelectric conversion module including: a first substrate having first and second main surfaces; a second substrate having third and fourth main surfaces; and a plurality of thermoelectric elements that are sandwiched between the first and second substrates and arranged along the second main surface and the third main surface. The thermoelectric element-containing package further includes: a frame joined to the first and second substrates so as to form a hermetically sealed space surrounding the plurality of thermoelectric elements and disposed between the first substrate and the second substrate; and a placement member that is disposed on the first main surface of the first substrate or the fourth main surface of the second substrate and to which an additional device is to be connected.

Abstract: A spark plug has an insulator having a through hole formed along an axial direction, a center electrode which is partially inserted into a portion of the through hole on a forward end side in the axial direction, and a glass seal portion which is in contact with the insulator and the center electrode within the through hole, in which the glass seal portion contains glass and an electrically conductive substance. The glass contains an Si component and a B component in a total amount of 50 mass % or more, as reduced to SiO2 and B2O3, a Zn component in an amount of 20 mass % to 35 mass % as reduced to ZnO, and an alkali metal component. The glass contains, as the alkali metal component, an Na component in an amount less than 1 mass % as reduced to Na2O.

Abstract: Spark plug has center electrode having leg portion extending in an axis direction, brim portion located at rear end side with respect to the leg portion and protruding outwards in a radial direction with respect to the leg portion and connecting portion connecting the leg portion and the brim portion; insulator having penetration hole and supporting the center electrode; and seal member filling the penetration hole and fixing the brim portion and the insulator. The center electrode satisfies “(D1-D2)/D1 ? 0.06”, where a maximum value of a radius of the brim portion is D1, and a minimum value of the radius of the brim portion is D2, also satisfies “L2/L1 ? 0.30”, where a size of the center electrode along the axis direction is L1, and a size along the axis direction from boundary between the connecting portion and the leg portion to a center of gravity of the center electrode is L2.

Abstract: To prevent a sealant from intruding between a flange and a stepped portion during manufacture of a spark plug and to prevent cracking of an insulator during use of the spark plug, a spark plug includes a center electrode including a flange, an insulator having a through-hole extending in an axial-line direction and holding the center electrode, and a sealant filled in the through-hole to fix the flange and the insulator to each other; the insulator including a stepped portion in which the through-hole reduces a diameter toward a front end side and that supports the flange, and a small-diameter portion that is continuous with a front end side of the stepped portion and in which the diameter of the through-hole is smaller than in the stepped portion; an angle ?1 formed by the stepped portion and a plane perpendicular to the axial line and an angle ?2 formed by the plane perpendicular to the axial line and an opposing surface of the flange opposing the stepped portion satisfies ?1??2?6°, and in a cross section i

Abstract: A spark plug includes a metallic shell which holds a center electrode in an insulated condition, and a ground electrode is held in a penetration hole of the metallic shell. The penetration hole includes a circular counterbore portion, and a penetrating portion extending from the counterbore portion to an inner circumferential surface of the metallic shell. The ground electrode includes a fixing portion which is fixed to the counterbore portion, and an extension portion extending from the fixing portion. The extension portion has a flat surface which faces a forward end surface of the center electrode in the axial direction. The penetrating portion restricts the extension portion such that the flat surface of the extension portion faces toward a rear end side in the axial direction.

Abstract: The spark plug includes: an insulator having an axial hole extending in an axial direction; a center electrode disposed at a front end in the axial direction of the axial hole and having a front end portion that protrudes from a front side of the axial hole; a tubular metal shell holding the insulator; and a ground electrode having one end portion that is fixed to a through hole provided in the metal shell, the ground electrode having another end portion that forms a discharge gap between the other end portion and the front end portion of the center electrode. The through hole extends toward the front side in the axial direction, in a direction from an outer peripheral surface toward an inner peripheral surface of the metal shell. The one end portion is located on a rear side relative to the other end portion in the axial direction.

Abstract: A noble metal tip for a spark plug according to the present invention contains iridium (Jr) in an amount of 50 mass % or more and aluminum (Al) in an amount of 0.1 mass % or more and 5 mass % or less, and further contains rhodium (Rh), wherein a metallographic structure comprised of fiber-like elements R is observed, and the fiber-like elements R of the metallographic structure have an average aspect ratio of 150 or more and have an average length of 25 ?m or less in a minor axis direction.

Abstract: A gas sensor (1) including: a sensor element (21) having a detection section (22) through an element introduction hole (25); a metallic shell (11); and a single-wall tubular protector (51) having a gas introduction hole (56) and a gas discharge hole (53); a gap G is present between the gas introduction hole and a forwardly facing surface (12a) of the metallic shell; when the gas introduction hole is viewed toward the rear end side, an area Sh of a portion of the forwardly facing surface seen through the gas introduction hole, is equal to or greater than ½ of an opening area Sg of the gas introduction hole; the element introduction hole is located on the forward end side in relation to a forwardmost end (12f) of the forwardly facing surface; and a distance L1 of the gap G is smaller than a diameter D of the gas introduction hole.

Abstract: A waveguide slot antenna is configured by a waveguide, formed by a dielectric substrate, a first conductive layer formed at a lower surface of the dielectric substrate, a second conductive layer formed at an upper surface of the dielectric substrate and provided with one or a plurality of slots, and a pair of side wall parts electrically connecting the first and second conductive layers and extending in a first direction, being provided with a power feeding part. The one or a plurality of slots include a first slot having a predetermined slot length along the first direction. The waveguide slot antenna has a structure in which, on a plan view from a second direction, the power feeding part overlaps the first slot, and the power feeding part does not deviate from a range of the slot length along the first direction.

Abstract: A holding apparatus including a holding substrate having a first main face on one side in a thickness direction thereof, and a heat generation section which is disposed in the holding substrate and generates heat when energized. The heat generation section includes a plurality of first heating elements arrayed in a planar direction orthogonal to the thickness direction of the holding substrate, and a second heating element disposed on a side toward the first main face in the thickness direction with respect to the plurality of first heating elements. Any one of the plurality of first heating elements is electrically connected to the second heating element in series through a first via extending in the thickness direction within the holding substrate.

Abstract: A surface-coated cutting tool including a tool substrate containing WC crystal grains and insulating grains, and a coating layer composed of a multiple nitride of Ti, Al, and V and disposed on the surface of the tool substrate. The multiple nitride is represented by a compositional formula: TiaAlbVcN satisfying the following relations: 0.25?a?0.35, 0.64?b?0.74, 0<c?0.06, and a+b+c=1 wherein each of a, b, and c represents an atomic proportion. The coating layer is characterized by exhibiting a peak attributed to a hexagonal crystal phase and a peak attributed to a cubic crystal phase as observed through X-ray diffractometry.

Abstract: This spark plug includes a cap portion covering a center electrode and an end of a ground electrode from a front side. In a cross section including an axial line, where a pitch of an external thread of a metal shell is X (mm), an axial-line-direction distance between a crest of a rear-end ridge of a full thread portion of an external thread and a rear end of a contact portion of an insulator with which the metal shell contacts directly or via another member is A (mm), an axial-line-direction distance between the rear end of the contact portion and a front end of the insulator is B (mm), and an axial-line-direction distance between the rear end of the contact portion and a seating surface of the metal shell is C (mm), 0<A<4×, B?15, and C?3.6 are satisfied.

Abstract: A spark plug having a center electrode that includes a columnar noble metal tip at one end thereof, and a ground electrode that forms a spark gap between the ground electrode and a circular discharge surface of the tip. In the tip, a mass % of Pt is largest and a content percentage of Ni is more than or equal to 0 mass % and less than or equal to 40 mass %. In each of both a cross-section of the tip parallel to the discharge surface and a cross-section of the tip perpendicular to the discharge surface, particles each having an aspect ratio of more than or equal to 1 and less than or equal to 10 occupy more than or equal to 70% of observed particles in an area extending from an outline of the cross-section by a distance of 10% of a diameter of the discharge surface.

Abstract: A gas sensor includes a gas sensor element for detecting the concentration of a specific gas in a gas under measurement, a tubular housing having an opening, a sealing member closing the opening, and a heat dissipating member having a rear end located at the same position or forward of the rear end of the housing. The heat dissipating member reduces heat transferred from the forward end side of the gas sensor to the sealing member and includes a connection portion connected to the housing, and a main portion extending rearward from the connection portion such that a gap is formed between the main portion and the housing. The main portion has heat dissipating openings for establishing communication between the gap and a space on the outer circumferential side of the heat dissipating member. The heat dissipating openings are formed on the rear end side of the main portion.

Abstract: A gas sensor (200) including a sensor element (10) having electrode pads (11a-12b); a separator (166); and a plurality of metal terminals (21a, 21b, 22a, 22b) each having a body portion (21a1) and a front end portion (21a2), and being insulated from each other by the separator. The separator has an element storage portion (168) penetrating in the axial-line direction or recessed toward a rear side from a front facing surface of the separator, the element storage portion has a first storage space (168a) at a front side thereof and a second storage space (168b) at a rear side thereof, the second storage space has a rotation restriction wall (168w) configured such that a relative rotation allowable angle 2? between the sensor element and the separator is smaller than in the first storage space, and the rear end side of the sensor element is stored in the second storage space.

Abstract: A spark plug having a center electrode that includes a columnar noble metal tip at one end thereof, and a ground electrode that forms a spark gap between the ground electrode and a circular discharge surface of the tip. In the tip, a mass % of Pt is largest and a content percentage of Ni is more than or equal to 0 mass % and less than or equal to 40 mass %. In each of both a cross-section of the noble metal tip parallel to the discharge surface and a cross-section of the tip perpendicular to the discharge surface, particles each having an aspect ratio of more than or equal to 1 and less than or equal to 10 occupy more than or equal to 70% of observed particles in an area extending from an outline of the cross-section by a distance of 10% of a diameter of the discharge surface.

Abstract: A gas sensor element includes: a first ceramic structure (100A) having a detection cell (120); a second ceramic structure (100B) having a pump cell (110) disposed apart from the first ceramic structure in a lamination direction; and a third ceramic structure (100C) having a frame-shaped body (200) surrounding a space (150a) formed between the first and second ceramic structures, the frame-shaped body including a gas introduction portion (151) and a peripheral wall portion (141). A gap (150b) connected to the space (150a) is formed between an opposed surface (151b1) and the second ceramic structure. A ceramic buffer layer (300) having a lower shrinkage start temperature than a material for forming the gas introduction portion is formed on the opposed surface so as to overlap a boundary portion X between an edge (150b1) on the external side of the gap and the second ceramic structure when viewed in the lamination direction.