Abstract: A multilayer ceramic electronic component comprises an element body obtained by stacking dielectric layers (thickness t1) and electrode layers (thickness t2). The dielectric layer includes a compound expressed by ABO3 (A includes Ba, and may include Ca or Sr; and B includes Ti, and may include Zr or Hf), and includes 0.75 to 2.0 moles of MgO, 0.4 to 1.0 mole of an oxide of Y, Dy, Ho and the like in terms of the oxide, and 0.4 to 0.8 mole of SiO2 per 100 moles of the compound. A segregation phase containing Mg is formed in at least a part of an electrode missing portion. Line coverage of the electrode layer is 60 to 90% and relations of 0.3 ?m?t1?2.0 and 0.3 ?m?t2<1.0 ?m are fulfilled.

Abstract: Disclosed is a method for producing carbon fibers which exhibit excellent adhesion to a matrix resin and have excellent processability. Specifically disclosed is a method for producing a sizing agent-coated carbon fibers, wherein at least one kind of sizing agent that is selected from the group consisting of sizing agents (a), (b) and (c) described below is used for coating, in each of said sizing agents a bi- or higher functional epoxy compound (A1) and/or an epoxy compound (A2) being used as a component (A), and said epoxy compound (A2) having a mono- or higher functional epoxy group and at least one functional group that is selected from among a hydroxyl group, an amide group, an imide group, a urethane group, a urea group, a sulfonyl group and a sulfo group. The method for producing a sizing agent-coated carbon fibers is characterized in that the sizing agent is applied to carbon fibers and the resulting is subjected to a heat treatment within the temperature range of 160-260° C. for 30-600 seconds.

Abstract: To provide a thin film balun that can improve balance characteristics while maintaining miniaturization. In a thin film balun to which an embodiment relates, an auxiliary coil portion is disposed at a predetermined position so as to face any one of an unbalanced transmission line and a balanced transmission line.

Abstract: A dielectric ceramic composition comprising a main component and at least one or more subcomponent elements has a dielectric particle and a grain boundary. The dielectric particle has a main component phase substantially composed of the main component, and a diffusive phase around the main component phase where at least one selected from the subcomponent elements is diffused, a local minimal value of Cs is located at an outside edge side with respect to a position of the local maximum value of Cs, and Cs is increased from a position of the local minimal value of Cs toward the outside edge, when the dielectric particle is cut on an arbitrary cutting plane including the main component phase, and Cs is defined as a concentration of one or more elements selected from the subcomponent elements in an arbitrary position in the dielectric particle.

Abstract: The present invention provides a thin film balun capable of preventing a resonant frequency from being increased to a high frequency due to size and thickness reductions and maintaining a preferable passage characteristic, while improving a balance characteristic. A thin film balun 1 includes: an unbalanced transmission line 2 having a first coil portion C1 and a second coil portion C2; and a balanced transmission line 3 having a third coil portion C3 and a fourth coil portion C4 which are magnetically coupled with the first coil portion C1 and the second coil portion C2, respectively. The first coil portion C1 is connected to an unbalanced terminal T0, and the second coil portion C2 is connected to a ground terminal G (ground potential) via a capacitor D (C component). The third coil portion C3 is connected to a balanced terminal T1 and the fourth coil portion C4 is connected to a second balanced terminal T2.

Abstract: A multilayer ceramic electronic component comprising an element body in which a dielectric layer and an internal electrode layer are stacked. The dielectric layer is constituted from a dielectric ceramic composition including; a compound having a perovskite structure expressed by a formula of ABO3 (A is at least one selected from Ba, Ca, and Sr; B is at least one selected from Ti, Zr, and Hf); an oxide of Mg; an oxide of rare earth elements including Sc and Y; and an oxide including Si. The dielectric ceramic composition comprises a plurality of dielectric particles and a grain boundary present in between the dielectric particles. In the grain boundary, when content ratios of Mg and Si are set to D(Mg) and D(Si) respectively, D(Mg) is 0.2 to 1.8 wt % in terms of MgO, and D(Si) is 0.4 to 8.0 wt % in terms of SiO2.

Abstract: The present invention provides a thin film balun capable of preventing a resonant frequency from being increased to a high frequency, and thus realizing a preferable passage characteristic. A thin film balun 1 includes: an unbalanced transmission line 2 having a first coil portion C1 and a second coil portion C2; and a balanced transmission line 3 having a third coil portion C3 and a fourth coil portion C4 which are magnetically coupled with the first coil portion C1 and the second coil portion C2, respectively. The first coil portion C1 is connected to an unbalanced terminal T0, and the second coil portion C2 is connected to a ground terminal G (ground potential) via a capacitor D (C component). The third coil portion C3 is connected to a balanced terminal T1 and the fourth coil portion C4 is connected to a second balanced terminal T2. The capacitor D is provided, in a plan view, in an area S1 between the outer end of the unbalanced terminal T0 and the outer end of the ground terminal G.

Abstract: A process for producing polyacrylonitrile-base precursor fibers for production of carbon fibers, which comprises spinning a spinning dope containing 10 to 25 wt % of a polyacrylonitrile-base polymer having an intrinsic viscosity of 2.0 to 10.0 by extruding the spinning dope from a spinneret by a wet spinning or a dry wet spinning method, drying and heat-treating fibers obtained by the spinning, and then steam drawing the resulting fibers, wherein the linear extrusion rate of the polyacrylonitrile-base polymer from the spinneret is 2 to 15 m/min.

Abstract: The present invention provides a thin film balun includes: an unbalanced transmission line 2 including a first coil portion C1 and a second coil portion C2; a balanced transmission line 3 including a third coil portion C3 and a fourth coil portion C4 that are magnetically coupled to the first coil portion C1 and the second coil portion C2, respectively; a first balanced terminal T1 connected to the third coil portion C3; a second balanced terminal T2 connected to the fourth coil portion C4; and an auxiliary coil portion C5 provided between the third coil portion C3 and the first balanced terminal T1 and/or between the fourth coil portion C4 and the second balanced terminal T2.

Abstract: A thin film balun includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a first electrode which is connected to the balanced transmission line and constitutes a capacitor; and a second electrode which is connected to a ground terminal and disposed to be opposed to the first electrode and constitutes the capacitor. The second electrode has a section opposed to the coils configuring the unbalanced transmission line or the balanced transmission line, the section being integrally formed with a section opposed to the first electrode.

Abstract: A process for producing polyacrylonitrile-base precursor fibers for production of carbon fibers, which comprises spinning a spinning dope containing 10 to 25 wt % of a polyacrylonitrile-base polymer having an intrinsic viscosity of 2.0 to 10.0 by extruding the spinning dope from a spinneret by a wet spinning or a dry wet spinning method, drying and heat-treating fibers obtained by the spinning, and then steam drawing the resulting fibers, wherein the linear extrusion rate of the polyacrylonitrile-base polymer from the spinneret is 2 to 15 m/min. Carbon fibers which are produced by stabilizing-carbonizing treatment of the polyacrylonitrile-base precursor fibers and which have a strand tensile modulus of 320 to 380 GPa and a conduction electron density of 3.0×1019 to 7.0×1019 spins/g as determined by electron spin resonance.

Abstract: Disclosed is a multilayer ceramic electronic component, comprising an element body obtained by stacking dielectric layers (thickness t1) and electrode layers (thickness t2). The dielectric layer (2) includes a compound expressed by ABO3 (A includes Ba, and may include Ca or Sr; and B includes Ti, and may include Zr or Hf), and includes 0.75 to 2.0 moles of MgO, 0.4 to 1.0 mole of an oxide of Y, Dy, Ho and the like in terms of the oxide, and 0.4 to 0.8 mole of SiO2 per 100 moles of the compound. A segregation phase (20) containing Mg is formed in at least a part of an electrode missing portion (30), where the electrode layer is supposed to be formed but no electrode layer is formed. Line coverage of the electrode layer (3) is 60 to 90% and relations of 0.3?t1?2.0 and 0.3?t2<1.0 are fulfilled.

Abstract: A thin film balun of the present invention comprises: an unbalanced transmission line UL including a first line portion L1 and a second line portion L2; a balanced transmission line BL including a third line portion L3 and a fourth line portion L4 that are positioned facing the first line portion L1 and the second line portion L2 and electromagnetically coupled to the first line portion L1 and the second line portion L2, respectively; an unbalanced terminal UT connected to an end of the first line portion L1; a first balanced terminal BT1 connected to the third line portion L3; a second balanced terminal BT2 connected to the fourth line portion L4; and a ground terminal G connected to the third line portion L3 and the fourth line portion L4, wherein the ground terminal G has an extension that extends from the ground terminal G to an area at the unbalanced terminal UT side.

Abstract: A thin film balun includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a capacitor having one end connected to the balanced transmission line; and a ground terminal connected to the other end of the capacitor. The capacitor is disposed in a region which does not overlap a coil included in the unbalanced transmission line and a coil included in the balanced transmission line.

Abstract: A polygon scanner including a polygon mirror, a bearing, a polygon motor, and a scanner board is mounted in an optical housing. A scanner-unit attachment portion to which the polygon scanner is attached is formed as a convex portion protruded from a bottom plate of the optical housing such that at least a planar shape of the polygon mirror is surrounded by the convex portion. The scanner board makes a tight contact with an upper surface of the convex portion in direct contact with each other, so that a bottom of the polygon scanner is covered by the convex portion and the bottom plate of the optical housing in a sealed manner.

Abstract: There is provided a thin film balun which, while incorporating a capacitor used to supply a DC bias, allows improvement of various required characteristics. A thin film balun according to the present embodiment includes: an unbalanced transmission line which includes two first coils; a balanced transmission line which includes two second coils and which magnetically couples with the unbalanced transmission line; a capacitor having one end connected to the balanced transmission line; and a ground terminal connected to the other end of the capacitor. The capacitor is disposed to have a region which does not overlap a part of coil openings defined by the first coils and the second coils.

Abstract: A carbon fiber precursor fiber having a weight average molecular weight Mw(F) of 200,000 to 700,000 and a degree of polydispersity MZ(F)/Mw(F), wherein MZ(F) indicates Z-average molecular weight of the fiber, of 2 to 5.

Abstract: A thin film balun that can be made smaller and thinner while maintaining required balun characteristics is provided. A thin film balun 1 includes: an unbalanced transmission line UL including a first coil portion C1 and a second coil portion C2; a balanced transmission line BL including a third coil portion C3 and a fourth coil portion C4 that are positioned facing and magnetically coupled to the first coil portion C1 and the second coil portion C2 respectively; an unbalanced terminal UT connected to the first coil portion C1; a ground terminal G connected to the second coil portion C2 via a C component D; and an electrode D2 connected to the ground terminal G and facing a part of the second coil portion C2. The C component D is formed by the electrode D2 and the part D1 of the second coil portion C2.

Abstract: The present invention provides a thin film balun capable of preventing a resonant frequency from being increased to a high frequency, and thus realizing a preferable passage characteristic. A thin film balun 1 includes: an unbalanced transmission line 2 having a first coil portion C1 and a second coil portion C2; and a balanced transmission line 3 having a third coil portion C3 and a fourth coil portion C4 which are magnetically coupled with the first coil portion C1 and the second coil portion C2, respectively. The first coil portion C1 is connected to an unbalanced terminal T0, and the second coil portion C2 is connected to a ground terminal G (ground potential) via a capacitor D (C component). The third coil portion C3 is connected to a balanced terminal T1 and the fourth coil portion C4 is connected to a second balanced terminal T2. The capacitor D is provided, in a plan view, in an area S1 between the outer end of the unbalanced terminal T0 and the outer end of the ground terminal G.

Abstract: The present invention provides a thin film balun capable of preventing a resonant frequency from being increased to a high frequency due to size and thickness reductions and maintaining a preferable passage characteristic, while improving a balance characteristic. A thin film balun 1 includes: an unbalanced transmission line 2 having a first coil portion C1 and a second coil portion C2; and a balanced transmission line 3 having a third coil portion C3 and a fourth coil portion C4 which are magnetically coupled with the first coil portion C1 and the second coil portion C2, respectively. The first coil portion C1 is connected to an unbalanced terminal T0, and the second coil portion C2 is connected to a ground terminal G (ground potential) via a capacitor D (C component). The third coil portion C3 is connected to a balanced terminal T1 and the fourth coil portion C4 is connected to a second balanced terminal T2.