Abstract: Electrodes (7, 8, 9), having curved sections in the shape of the outline thereof, are disposed in areas of a rectangular plate-shaped piezoelectric transducer element (1) in which the strain in the natural mode of vibration is large. The electrodes (7, 8) which excite a bending vibration are disposed in areas in which the strain in the bending natural mode is at least a predetermined value, and the outline curved sections of the electrodes (7, 8) are shaped so as to follow along strain contours (3, 4), and the electrode (9) which excites a stretching vibration is disposed in an area in which the strain in the stretching natural mode is at least a predetermined value, thus providing a transducer for an ultrasonic motor which aims to reduce transducer loss (increasing vibration efficiency), and improve transducer durability and reliability.

Abstract: A holding device for a piezoelectric vibrator including a support member (11) for separately accommodating a piezoelectric vibrator (1), a first plate spring member (13) which extends from a proximal end fixedly bonded to one side of the support member (11) so as to sandwich opposing sides of the piezoelectric vibrator (1) and is folded back to be fixedly bonded to the piezoelectric vibrator, and a second plate spring member (18) which extends from a proximal end fixedly bonded to another side of the support member (11) so as to sandwich the opposing sides of the piezoelectric vibrator (1) and is folded back to be fixedly bonded to the piezoelectric vibrator. The first plate spring member (13) and the second plate spring member (18) are integrated at portions fixedly bonded to the piezoelectric vibrator (1).

Abstract: The present invention addresses the problem of increasing the lifetimes of an oscillatory wave motor and a sound generation device using the oscillatory wave motor as a drive source, and proposed the structure and mechanism for integrally increasing the lifetimes of the oscillatory wave motor and the sound generation device using the oscillatory wave motor as the drive source. To maintain the drive performance of a drive unit, the drive unit is provided with a core sheathing structure, with the result that the drive unit is prevented from breaking and being damaged, and even if the entire drive unit is worn down, an intrinsic drive unit member serving as a core portion keeps the same drive area, so an initial drive feature is maintained. The descending order of a wear resistance of the members is the drive unit core material, a moving unit, and a drive unit sheathing material.

Abstract: An anodic bondable low-temperature fired porcelain having high-strength and low-thermal-expansion, wherein a conductive ion during anodic bonding is an Li ion, containing a complex oxide having a composition represented by the following formula: (1?x)(?Li2O-?MgO-?Al2O3-?Si2O2).xBi2O3??(1) where x represents a mass ratio of 0.01 to 0.1, and ?, ?, ? and ? have a molar ratio of 2 to 5:1 to 2:1 to 2:7 to 17.

Abstract: A piezoelectric actuator mechanism including: a screw-driven feeding mechanism that has a feed screw (11) and a feed screw nut (14); a disc-shaped rotor (17) mounted on the rear-end face of the feed screw nut (14); an ultrasonic motor (18) having a piezoelectric vibrator (19) that comes in contact with the circumference face of the rotor (17); and a driven mounting portion that is pressed against the leading end of the feed screw 11 by spring force, and displaced and positioned by the feeding operation of the feed screw. The driven mounting portion can be made to be a mirror holder (1) for use in an optical system, or a movable table (21) of a linear stage.

Abstract: Electrodes (7, 8, 9), having curved sections in the shape of the outline thereof, are disposed in areas of a rectangular plate-shaped piezoelectric transducer element (1) in which the strain in the natural mode of vibration is large. The eletrodes (7, 8) which excite a bending vibration are disposed in areas in which the strain in the bending natural mode is at least a predetermined value, and the outline curved sections of the electrodes (7, 8) are shaped so as to follow along strain contours (3, 4), and the electrode (9) which excites a stretching vibration is disposed in an area in which the strain in the stretching natural mode is at least a predetermined value, thus providing a transducer for an ultrasonic motor which aims to reduce transducer loss (increasing vibration efficiency), and improve transducer durability and reliability.

Abstract: An object is to provide a holding device for a piezoelectric vibrator, which eliminates vibration energy loss and a change in vibration characteristics, and is capable of supplying stable output with high efficiency. The holding device for a piezoelectric vibrator of the present invention includes: a support member (11) of a frame shape or a box shape for separately accommodating a piezoelectric vibrator (1); and a plate spring structure (12) interposed between sides of the support member (11) and the piezoelectric vibrator (1).

Abstract: An anodic bondable low-temperature fired porcelain having high-strength and low-thermal-expansion, wherein a conductive ion during anodic bonding is an Li ion, containing a complex oxide having a composition represented by the following formula: (1?x)(?Li2O-?MgO-?Al2O3-?Si2O2).xBi2O3??(1) where x represents a mass ratio of 0.01 to 0.1, and ?, ?, ? and ? have a molar ratio of 2 to 5:1 to 2:1 to 2:7 to 17.

Abstract: In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are provided for applying voltage to each of the polarized region, and further provides a stack-type piezoelectric vibrator for an ultrasonic motor, consisting of a stack of the said vibrators and having an extraction electrode pattern provided for short circuit with an external electrode. The vibrator of the invention has high controllability, especially in a fine movement region and is useful as a driving source in a positioning device, in which enhanced vibration efficiency can be obtained.

Abstract: The present invention provides a thermoelectric conversion module, comprising plural first electrode films (11, 12, 13) formed apart from each other on the top surface of an insulating body (10), plural p- and n-type thermoelectric semiconductor element films (16, 19) and (17, 18) formed thereon, which are arranged apart from each other so that p- and n-type thermoelectric semiconductor element films alternate with each other, and second electrode films (20) connecting p-type thermoelectric semiconductor element film (19) and n-type thermoelectric semiconductor element film (18) over the gaps between the first electrode films; and a terminal electrode is connected to each of the p-and n-type thermoelectric semiconductor element film (16, 17) at the end; and a production method thereof.

Abstract: In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are provided for applying voltage to each of the polarized region, and further provides a stack-type piezoelectric vibrator for an ultrasonic motor, consisting of a stack of the said vibrators and having an extraction electrode pattern provided for short circuit with an external electrode. The vibrator of the invention has high controllability, especially in a fine movement region and is useful as a driving source in a positioning device, in which enhanced vibration efficiency can be obtained.

Abstract: A low temperature sintering ceramic composition can be sintered at 850 to 1,000° C., and the sintered ceramic has a low dielectric constant (9 or less at 16 Ghz or more) and a high Qf (10,000 or more). The composition can be co-sintered with wiring material containing Ag, Au, or Cu. The ceramic composition includes (by mass) CaO, MgO, and SiO2 in total: over 60% to 98.6%; Bi2O3: from 1% to under 35%; and Li2O: from 0.4% to under 6%; wherein (CaO+MgO) and SiO2 are contained in the molar ratio of from 1:1 to under 1:2.5.

Abstract: A low temperature sintering ceramic composition that can be sintered at a temperature equal to or less than 1000° C. and has low dielectric constant and dielectric loss in a high frequency region of 17 Ghz or more, an electronic component using the same and a method of fabricating the low temperature sintering ceramic are provided. The composition comprises MgO and SiO2 in sum total in the range of from 64.0 to 99.2% by mass; Bi2O3 in the range of from 0.4 to 33.0% by mass; Li2O in the range of from 0.4 to 3.0% by mass; and MgO and SiO2 are contained in the molar ratio of from 2:1 to 2:3.5, at least part thereof being contained as a complex oxide of Mg and Si.

Abstract: A low temperature sintering ceramic composition can be sintered at 850 to 1,000° C., and the sintered ceramic has a low dielectric constant (9 or less at 16 Ghz or more) and a high Qf (10,000 or more). The composition can be co-sintered with wiring material containing Ag, Au, or Cu. The ceramic composition includes (by mass) CaO, MgO, and SiO2 in total: over 60% to 98.6%; Bi2O3: from 1% to under 35%; and Li2O: from 0.4% to under 6%; wherein (CaO+MgO) and SiO2 are contained in the molar ratio of from 1:1 to under 1:2.5.

Abstract: A low temperature sintering ceramic composition that can be sintered at a temperature equal to or less than 1000° C. and has low dielectric constant and dielectric loss in a high frequency region of 17 Ghz or more, an electronic component using the same and a method of fabricating the low temperature sintering ceramic are provided. The composition comprises MgO and SiO2 in sum total in the range of from 64.0 to 99.2% by mass; Bi2O3 in the range of from 0.4 to 33.0% by mass; Li2O in the range of from 0.4 to 3.0% by mass; and MgO and SiO2 are contained in the molar ratio of from 2:1 to 2:3.5, at least part thereof being contained as a complex oxide of Mg and Si.

Abstract: A ball-grid-array-type semiconductor device comprising a package substrate constituted with a ceramic wiring board having a semiconductor chip mounting portion on the principal plane and electrodes arranged like an array on the back, a semiconductor chip secured to the principal plane of the package substrate, connection means for electrically connecting the electrodes of the semiconductor chip with the wiring of the wiring board, a sealing body provided for the principal plane side of the wiring board and made of an insulating resin to cover the semiconductor chip and the connection means, a pedestal layer made of low-fusion-point solder and formed on the electrodes, and a metallic ball secured onto the pedestal layer; wherein a buffering layer made of high-fusion-point solder which covers the entire surface of the electrodes and whose margin extends up to a predetermined length on the back of the package substrate is formed on the electrodes and the pedestal layer is formed on the buffering layer.

Abstract: A process for fabricating an electronic component having a hollow packaging structure comprises the steps of: (a) printing an organic polymeric material on at least a portion of a main surface of a ceramic substrate where a ceramic lid is to be bonded and curing the printed organic polymeric material to form a cured product; (c) hermetic sealing the ceramic lid on a surface of the cured product with an organic bonding agent; and preferably (b) irradiating ultraviolet rays onto a surface of said cured product to form activated bonding sites between said steps (a) and (c). According to the process, a hollow package mounted with an electronic component can be fabricated efficiently.

Abstract: The exothermic instrument for firing an explosive comprises a circuit board 1 having a heat resist layer 6 on a substrate 11 and an exothermic resistance 4, which connects to a pair of through hole conductive electrodes 13 passing through the substrate 11, contacting with the explosive 19 on the heat resist layer 6, a pair of electrode pins 8, each one thereof is inserted into each one of the through hole conductive electrodes, and an insulator for holding the circuit board 1 through which the electrode pins 8 pass.

Abstract: A conductor paste for plugging a through-hole in a ceramic substrate which includes an electrically conductive powder having a metal powder as its main component, a swelling agent and a vehicle, and may also include adhesion improvers. After sintering the conductor paste, a conductor plug is created which will not fall out of the through-hole, is resistant to chipping during the leveling process and may be gas impermeable.

Abstract: A conductor paste for plugging a through-hole in a ceramic substrate which includes an electrically conductive powder having a metal powder as its main component, a swelling agent and a vehicle, and may also include adhesion improvers. After sintering the conductor paste, a conductor plug is created which will not fall out of the through-hole, is resistant to chipping during the leveling process and may be gas impermeable.