Abstract: A medical device for cutting an object in a body lumen includes: a tubular drive shaft; a cutting unit fixed to a distal portion of the drive shaft; a protective tubular main body accommodated in the drive shaft and the cutting unit and rotatable relative to the drive shaft; and a protective-side stopper disposed on an outer peripheral surface of a distal portion of the protective tubular main body. The distal portion of the drive shaft or the cutting unit has a drive-side stopper contactable with the protective-side stopper. By the protective-side stopper coming into contact with the drive-side stopper, the protective tubular main body is restrained from moving axially with respect to the drive shaft without being restrained from rotating relative to the drive shaft.

Abstract: A board main body includes first and second resin layers contacting each other and including thermoplastic resin, a first signal conductor layer on an upper main surface of the second resin layer, an overlapping region in which the first and second resin layers are present when viewed in an up-down direction, and a non-overlapping region in which the first resin layer is not present and the second resin layer is present when viewed in the up-down direction. The first signal conductor layer includes a first curved portion in which the first signal conductor layer is curved in the up-down direction such that the first signal conductor layer in the first non-overlapping region is above the first signal conductor layer in the overlapping region. The first signal conductor layer is electrically connectable to an element on the board main body in the first non-overlapping region.

Abstract: When viewed in a negative direction of a Z-axis, a radiation conductor layer region in which a radiation conductor layer is provided includes a ground conductor layer non-forming region in which one or more first ground conductor layers are not provided. When viewed in the negative direction of the Z-axis, a signal conductor layer includes an overlapping portion overlapping the ground conductor layer non-forming region. In the ground conductor layer non-forming region, a conductor entirely covering the ground conductor layer non-forming region is not present on a positive side of the Z-axis relative to the signal conductor layer, except for the radiation conductor layer.

Abstract: An antenna structure has a second positive main surface that is in contact with a first negative main surface. At least one first ground conductor layer is positioned in a positive direction along a Z-axis from a signal conductor layer. The at least one first ground conductor layer is not positioned at a second positive main surface. A first substrate area in which a first substrate is disposed has an unoccupied-by-ground-conductor-layer area in which the at least one first ground conductor layer is not disposed when viewed in a negative direction along the Z-axis. The signal conductor layer overlaps the unoccupied-by-ground-conductor-layer area when viewed in the negative direction along the Z-axis. At a portion in the unoccupied-by-ground-conductor-layer area in the positive direction along the Z-axis from the signal conductor layer, no conductor other than a radiating conductor layer covers an entirety of the unoccupied-by-ground-conductor-layer area.

Abstract: A circuit board includes a board body, a signal conductor, a power supply conductor, and a first reference conductor. The signal conductor is in the board body and a high frequency signal is transmitted through the signal conductor. The power supply conductor is in the board body and is connected to a power supply potential. The power supply conductor extends along at least a portion of the signal conductor. The first reference conductor is in the board body and is insulated from the signal conductor and the power supply conductor.

Abstract: A multilayer board includes thermoplastic resin layers laminated together, a first-class conductor pattern including a conductor foil on a first surface of one of the thermoplastic resin layers, a second-class conductor pattern in contact with a second surface of the one of the thermoplastic resin layers, and an interlayer connection conductor in the one of the thermoplastic resin layers and including a first end surface connected to the first-class conductor pattern and a second end surface connected to a second-class conductor pattern. The second-class conductor pattern and the first interlayer connection conductor include a conductor of a single material including a resin, or a conductor of a single material including a metal with a melting point lower than that of the conductor foil.

Abstract: A circuit board includes a first section on a left side of a third section in a signal-conductor-layer left-right direction and extending in parallel or substantially in parallel with the third section in a signal-conductor-layer front-back direction when viewed in a stacking direction. The first section includes first thin line portions and first thick line portions, each of the first thick line portions has a line width greater than a line width of each of the first thin line portions. The first thin line portions and the first thick line portions are alternately arranged in the signal-conductor-layer front-back direction. In the signal-conductor-layer left-right direction, center lines of the first thin line portions are positioned leftward relative to center lines of the first thick line portions.

Abstract: A multilayer substrate module includes a first substrate portion including a first substrate portion body including first insulator layers stacked in a vertical direction and a first conductor layer and/or a first interlayer connection conductor provided at the first substrate portion body. A second substrate portion includes a second substrate portion body including second insulator layers stacked in the vertical direction and a second conductor layer and a second interlayer connection conductor provided at the second substrate portion body, and is mounted on an upper surface of the first substrate portion. A mount device is mounted on an upper surface or a lower surface of the second substrate portion. At least a portion of an inductance component is defined by the first conductor layer and the first interlayer connection conductor.

Abstract: Provided is a medical device that removes an object in a body lumen, the medical device including: a rotatable drive shaft; a cutter that is rotationally driven by the drive shaft and is able to cut the object; an outer tube shaft that rotatably accommodates the drive shaft; and a loosely wound conveyance coil disposed to wrap around the outer periphery of the drive shaft. The conveyance coil is fixed to the drive shaft only at a distal end section of the conveyance coil.

Abstract: A medical device includes an elongated drive shaft that rotates around a central axis, and an elongated outer tubular shaft disposed outside the drive shaft, in which an outer surface of a distal end of the drive shaft is covered with a distal end covering portion made of resin. The drive shaft is a tubular body in which a plurality of wires or wire rods is arranged and spirally coupled around the axis, and at least a part of the distal end covering portion enters an inside of the drive shaft from between the wire rods.

Abstract: Provided is a method for positioning a medical device for cutting an object in a blood vessel, the medical device including: a drive shaft that is rotatable; a cutter disposed on the distal side with respect to the drive shaft; a drive unit that rotates the drive shaft; and an outer tube shaft that rotatably accommodates the drive shaft.

Abstract: A medical device including a long shaft, the shaft including a distal end tube made of metal, the distal end tube provided with a distal end side rough surface portion having an uneven shape provided on an outer surface of a distal end, a proximal end side rough surface portion having an uneven shape provided on an outer surface of a proximal end, and an intermediate portion as a region between the distal end side rough surface portion and the proximal end side rough surface portion including a smooth outer surface, the distal end tube including an outer surface covered with a covering material made of resin, and the covering material being in close contact with the distal end side rough surface portion and the proximal end side rough surface portion.

Abstract: In a transmission line, a signal conductor layer extends in a front-back direction orthogonal to an up-down direction. A ground conductor layer is above the signal conductor layer. When viewed in a first orthogonal direction, first hollow portions are arranged in the front-back direction in a first direction of the signal conductor layer, and second hollow portions are arranged in the front-back direction in a second direction of the signal conductor layer. Each of regions between adjacent first hollow portions in the front-back direction is a first region. Each of regions between adjacent second hollow portions in the front-back direction is a second region. Each of the first hollow portions overlaps with a corresponding one of the second regions when viewed in a second orthogonal direction. Each of the second hollow portions overlaps with a corresponding one of the first regions when viewed in the second orthogonal direction.

Abstract: In a multilayer substrate, one of a first reference conductor layer and a second reference conductor layer overlapping an eleventh interlayer connection conductor includes a first opening overlapping a signal conductor layer when viewed in a Z-axis direction. When viewed in the Z-axis direction, the first opening is positioned in a negative direction of an X axis relative to a vicinity of a first reference straight line connecting a second interlayer connection conductor and a fifth interlayer connection conductor. When viewed in the Z-axis direction, the first opening is positioned in a positive direction of the X axis relative to the eleventh interlayer connection conductor.

Abstract: A medical device is able to achieve a high aspiration pressure while also effectively transmitting rotational torque to a cutting portion to remove an object inside a biological lumen. The medical device includes a drive shaft, an outer tube accommodating the drive shaft, a cutting portion fixed to the drive shaft, and a hub unit. The hub unit has a first housing with an aspiration port, a second housing with a liquid delivering port, and first and second seal portions disposed between the second housing and the drive shaft. The first seal portion has a first frictional coefficient, and the second seal portion has a second frictional coefficient. The first frictional coefficient is lower than the second frictional coefficient, and the first seal portion is located on a distal side of the second seal portion.

Abstract: A multilayer body includes liquid crystal polymer layers including first, second, and third liquid crystal polymer layers stacked on each other in a Z-axis direction. The first liquid crystal polymer layer is located farther toward a positive side of the Z axis than the rest of the plural liquid crystal polymer layers. The third liquid crystal polymer layer is located farther toward a negative side of the Z axis than the rest of the plural liquid crystal polymer layers. At least one first conductive layer is located between the first liquid crystal polymer layer and the second liquid crystal polymer layer and/or between the second liquid crystal polymer layer and the third liquid crystal polymer layer. A gas permeability amount of the first liquid crystal polymer layer per unit volume and that of the third liquid crystal polymer layer are greater than that of the second liquid crystal polymer layer.

Abstract: An interlayer connection conductor is inside a through-hole extending through first and second insulator layers in a Z-axis direction. A first conductor layer is on a negative main surface of an insulator layer farther in a negative direction of the Z-axis than the second insulator layer, and in contact with an end portion of the interlayer connection conductor in the negative direction of the Z-axis. A second conductor layer is on a positive main surface of the second insulator layer and in contact with an end portion of the interlayer connection conductor in a positive direction of the Z-axis. A surface roughness of a portion in the second insulator layer inside the through-hole is larger than a surface roughness of a portion in the first insulator layer inside the through-hole. No conductor layer in contact with the interlayer connection conductor is provided between the first and second insulator layers.

Abstract: A medical device for grinding substance inside a body lumen includes a rotatable tubular drive shaft, a treatment member connected to the drive shaft, and a tubular member possessing an axially extending lumen that extends throughout the tubular member. The tubular member is mounted on the treatment member and surrounds a portion of the treatment member so that the treatment member is rotatable relative to the tubular member. The treatment member includes a shearing portion, and the tubular member includes a protrusion that projects toward the lumen of the tubular member. The protrusion is located axially in front of the shearing portion and interacts with the shearing portion during relative rotation between the treatment member and the tubular member to shear debris resulting from the grinding of the substance.

Abstract: A medical device and can remove an object inside a biological lumen while allowing a positional change of the device inside the biological lumen. The medical device includes a drive shaft, an outer tube accommodating the drive shaft, a cutting portion fixed to a distal portion of the drive shaft, and a hub unit housing proximal portions of the drive shaft and the outer tube. The hub unit has an operation unit fixed to the outer surface of the outer tube to rotate the outer tube, a first support portion rotatably supporting the operation unit, a first housing having an aspiration port for discharging fluid to outside, and causing communication of an aspiration lumen of the outer tube with the aspiration port, and a first seal between the first housing and the outer tube. The first support portion and the first seal are disposed in parallel along an axial direction.

Abstract: A multilayer board in which interlayer connection conductors include one or more first interlayer connection conductors in a first region and passing through any of a first insulator layer, a second insulator layer, and a third insulator layer in an up-down direction and a second interlayer connection conductor located in a second region and passing through the third insulator layer in the up-down direction. The second interlayer connection conductor is joined to a conductor and a second conductor layer. An area of the second interlayer connection conductor viewed in the up-down direction is larger than a minimum value of areas of the one or more first interlayer connection conductors viewed in the up-down direction.