Abstract:
PROBLEM TO BE SOLVED: To provide a junction structure of a conductor which can reduce connection failure even if an inner conductor and a surface conductor are different in composition. SOLUTION: A tip part 2a of an inner conductor (Ag) 2 is joined to a surface conductor (Ag-Pd) 31. That is, the tip part 2a of the inner conductor 2 (pattern width of 250 μm) is formed to overlap with a surface conductor 31 by 50 μm or more, for example, from a long side of a pattern width of 600 μm of the surface conductor 31, and the overlapping part is made a junction part 35. Especially, since the inner conductor 2 does not comprise Pd, difference of Pd concentration of the inner conductor 2 and the surface conductor 31 in the junction part 35 is in the range of 15 wt.% or less (5 wt.%, for example).
Abstract:
PROBLEM TO BE SOLVED: To provide a ceramic circuit board which has a conductor film and a minute-area resistor film of precise dimensions formed on a ceramic board and also provide a manufacturing method thereof. SOLUTION: A ceramic circuit board is manufactured by screen-printing conductor paste and resistor paste on a ceramic green sheet 1a and baking them. At that time, a pair of dams 3a made of insulator paste are formed at an interval which is equal to the width of a resistor film to be formed from resistor paste, and then resistor paste is printed between the dams 3a and is baked. The resistor paste is prevented from bleeding in the width direction by a pair of the dams 3a and thereby the resistor film 4 of high dimensional accuracy can be formed. Especially, the thickness of the dams 3a are made smaller than that of the resistor film 4a, but not excessively smaller in the balance between the resistor film 4a and the dams 3a. Therefore, the resistor film 4 of high dimensional accuracy can be efficiently formed with good reproducibility.
Abstract:
PROBLEM TO BE SOLVED: To lessen the warp and transformation of a wiring board by making the shrinkage actions at baking of wiring material and ceramic material close ones, in a ceramic wiring board which is made by baking at low temperature, using low melting paint metal such as Ag, Pd, Au, or the like for its wiring material. SOLUTION: This ceramic wiring board has a metallized part which contains compounds of W and/or Mo by 3-5 pts.wt. in terms of metal and glass compositions by 1-10wt.pts. to 100 pts.wt. of metal for conductivity consisting of at least one kind out of Ag, Pd, Au, and Pt. In this case, the compounds of W are ones which contain WO3 or WSi2 , and the compounds of Mo are ones which contain MoSi2 .
Abstract:
PURPOSE:To obtain a creeping corona discharge element which is small in the quantity of a nitrogen oxide generated and has high mechanical strength. CONSTITUTION:A filamentary discharge electrode 4 is formed on the surface of a laminar substrate 1 formed out of mullite ceramic, and a planar induction electrode 3 is then buried in the substrate 1 so that the filamentary discharge electrode 4 and the planar induction electrode 3 can be faced to each other via the substrate 1. A composition of the mullite ceramic consists of mullite as its main element and an insulator containing 10 to 40wt.% of Al2O3-SiO2-MgO group glass.
Abstract:
PURPOSE:To provide a wiring board having via which is excellent in the connection between a conductive post and a surface wiring and suitable for fine patterning of surface wiring. CONSTITUTION:The inventive method comprises step (a) for preparing a ceramic board internally provided with a conductor post, step (b) for preparing a photosensitive glass paste containing glass frit and photosensitive agent, step (c) for coating the surface of the ceramic substrate with the photosensitive glass paste, step (d) for partially removing the photosensitive glass paste through exposure and development to expose at least one end face of the conductor post, and step (e) for heating the remaining photosensitive glass paste and baking the paste onto the ceramic board thus forming a dielectric film.
Abstract:
PROBLEM TO BE SOLVED: To provide a transmission system capable of performing efficient transmission between a pair or resonance elements that are arranged proximally.SOLUTION: In a transmission system, a resonance element 10 included in each transmission device has: a resonance electrode 12 formed on one side of a dielectric substrate 11; a ground electrode 13 formed on the other side of the dielectric substrate 11; and a via conductor 14 and an input and output electrode 16 that serve as a feeding part. When a high-frequency signal is transmitted between a transmission device including a transmission circuit and a transmission device including a reception circuit, the resonance electrodes 12 of the respective resonance elements 10 are arranged so as to be directly opposed to each other at a predetermined distance, and a high frequency signal can be transmitted between the two transmission devices by electric field coupling at the time.
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer ceramic substrate, capable of suppressing the occurrence of cracks near an interlayer connecting conductor section, preventing the destruction of a substrate, and enhancing the bonding strength of a protruding member, and to provide a method for producing the substrate. SOLUTION: The distance Z between the circumscribed circle of a brazing material layer 59, in the circumference of the bottom surface of a stud 23 and the area center of a via 55 disposed around a surface metal layer 57 on the top-surface low-temperature baking ceramic layer, is not less than 2.5 mm. Centered about the area center of the bottom surface of the stud 23, the difference (ML-RL) between the radial length ML of the surface metal layer 57 and the same radial length RL of the bottom surface of the brazing material layer 59 is not less than 0.65 mm, all around the circumference of the stud 23. Centered about the area center of the bottom surface of the stud 23, the ratio (VL/SL) between a radial length VL up to the area center of a via 55 closest to the stud 23 and the same radial length SL of the bottom surface of the stud 23 is from 1.6 to 2.0. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a stacked multiplexer which attains compatibility between miniaturization and performance by configuring an output-side circuit of a predetermined filter circuit while including an inductor formed from a terminal electrode of a stack. SOLUTION: A stacked multiplexer is formed into a stack, and filter circuits 11, 12, 13 with a plurality of frequency bands as pass bands, respectively, include a common terminal Ta and a plurality of individual terminals T1, T2, T3. Among these filter circuits, the filter circuit 13 includes a distributed constant circuit including resonators Lc, Ld and a centralized constant circuit including a capacitor C32 and a series resonant circuit 13a. An inductor L32 included in the series resonant circuit 13a is formed from a terminal electrode formed in the stack by drawing in a stacking direction, one end of the terminal electrode is connected to a ground potential and the other end thereof is connected to a capacitor C35. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a diplexer and the like provided with a band pass filter having an excellent attenuation characteristic at a low-frequency side of a passband. SOLUTION: The diplexer 10 includes: a band pass filter 11 connected between a common terminal T0 and a first terminal T1 with a first frequency band as a passband; and a band pass filter 12 composed of a high-pass filter 12a and a low-pass filter 12b connected in series between the common terminal T0 and a second terminal T2 with a second frequency band as a passband. The high-pass filter 12a includes: capacitors C20, C21 connected in series between the common terminal T0 and an output node Na, an inductor L20 connected between a connecting point of these capacitors C20 and C21 and a ground; and a notch circuit (inductor L21 and capacitor C22) connected between the output node Na and the ground. The high-pass filter 12a is effective for enhancing an attenuation characteristic at a low-frequency side of the passband, in particular. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a ceramic wiring board in which flotation, and the like, of lead in a ball shape on a surface of wiring is suppressed, and to provide a manufacturing method of such a ceramic wiring board. SOLUTION: The ceramic wiring board 1 has a ceramic insulator 11 (made of alumina etc.) and the wiring 12 provided on the surface thereof and/or in it, and the wiring contains copper, tungsten particles etc., and metal compound particles (alumina particles etc.), wherein the metal compound particle has an average particle size of ≤500 nm and the wiring contains 25 to 65 parts by mass of copper and 35 to 75 parts by mass of tungsten particles. The manufacturing method of the ceramic wiring board is characterized in that each of a plurality of unbaked ceramic sheets (alumina sheets etc.) has at least one surface coated with conductive paste containing copper powder, tungsten powder etc., and metal compound powder (alumina powder etc.) of ≤150 nm in average particle size, and are layered and then baked. COPYRIGHT: (C)2009,JPO&INPIT