摘要:
A method for manufacturing a resonator in a substrate, including: a) modifying a structure of at least one region of the substrate to make the at least one region more selective; b) etching the at least one region to selectively manufacture the resonator.
摘要:
A bonding type crystal controlled oscillator includes a crystal package and a circuit package bonded by two-tier bonding. An anisotropy conductive adhesive is interposed between back surface of the crystal package facing the circuit package and an upper surface of the circuit package facing the crystal package. The anisotropy conductive adhesive includes a thermosetting resin containing solder micro particles dispersed in the thermosetting resin. Assuming that a thickness of the output terminal formed at the crystal package is C μm, a thickness of the external terminal formed at the circuit package is D μm, and an average outside diameter of the solder micro particles dispersed in the anisotropy conductive adhesive is E μm, the dimensional relation is set to (C+D)>E.
摘要:
A dual-mode crystal oscillator includes a single AT-cut quartz crystal piece, a package, and an integrated circuit. The integrated circuit includes an oscillation circuit configured to cause the AT-cut quartz crystal piece to oscillate at a frequency in the MHz band, a dividing circuit configured to divide the frequency in the MHz band to generate a frequency of 32.768 kHz, a selection circuit configured to select one of a pause state where the frequency in the MHz band is not output and an active state where the frequency in the MHz band is output. The mounting surface includes three electrodes arranged in a direction along the long side and two electrodes arranged in a direction along the short side. The electrode to output the frequency of 32.768 kHz and the electrode to output the frequency in the MHz band are arranged not adjacent to one another.
摘要:
The electronic module (1) includes a quartz or MEMS resonator (3), which is confined within a resonator case (5), which is provided with electrical contact pads (15) over at least one external surface for the electrical connection of the resonator. A printed circuit board (6) is also provided for carrying the resonator case (5) and it includes electrical connection terminals (18) for connection to the electrical connection pads (15) of the resonator case. The resonator case (5) is fixedly held inside a case structure (6, 9) of the electronic module (1), via at least one mechanical shock damping element (7). The damping element 7) may be an elastomer element, which includes metal wires (17) for the electrical connection of the resonator case (5) across the printed circuit board (6).
摘要:
Provide a highly efficient manufacturing method of a piezoelectric vibrator and to provide a piezoelectric vibrator manufactured by this manufacturing method. A method for manufacturing a piezoelectric vibrator 1 including: a base board 2 and a lid board 3 which are superimposed on each other so as to form a cavity therebetween; a piezoelectric vibrating reed 4 which is accommodated in the cavity and bonded to the base board; a bonding film 35 which is formed on the entire surface of the lid board on the opposite side to the base board so as to bond both boards to each other at a portion thereof being in contact with the base board, wherein the piezoelectric vibrating reed includes a pair of vibrating arms 10 and 11 and a weight metal film 21 formed on a tip end of each of the vibrating arms, wherein the bonding film is formed of a material which is capable of absorbing surrounding gas by being activated with laser irradiation, and wherein the method includes a laser irradiation step of simultaneously irradiating the weight metal film and the bonding film with a laser beam.
摘要:
The present invention is a method for adjusting the resonant frequency of a mechanical resonator whose frequency is dependent on the overall resonator thickness. Alternating selective etching is used to remove distinct adjustment layers from a top electrode. One of the electrodes is structured with a plurality of stacked adjustment layers, each of which has distinct etching properties from any adjacent adjustment layers. Also as part of the same invention is a resonator structure in which at least one electrode has a plurality of stacked layers of a material having different etching properties from any adjacent adjustment layers, and each layer has a thickness corresponding to a calculated frequency increment in the resonant frequency of the resonator.
摘要:
In an assembly of a piezoelectric crystal and an IC on a substrate, additional capacitors, such as load capacitors of a crystal oscillator, are designed as blocks for mounting the crystal on the substrate at its vibration nodes.
摘要:
The GT-cut quartz resonator resonated by two longitudinal modes and provided with the masses for frequency-temperature characteristics adjustment and frequency adjustment. The frequency-temperature characteristics and the frequency of the GT-cut quartz resonator are adjusted by eliminating the masses. Consequently, the quartz resonator adjusted to the normal frequency and having the excellent frequency-temperature characteristics is attained. Further the GT-cut quartz resonator of small and thin size is attained by making the resonant portion and the supporting portions in one piece by photolithographic technique.
摘要:
A subminiature flexural mode quartz crystal vibrator comprises a tuning fork formed by photolithographic techniques from a thin quartz crystal plate obtained by rotating an X-cut plate around the X-axis by an angle of 0.degree. to 10.degree. and further rotating the X-cut plate around the Y'-axis by an angle of 70.degree. to 90.degree., the plate having a thickness of less than 0.2 mm. Electrodes formed on sides of the tines are of a different metallic material from planar electrodes formed on at least one of the top and bottom surfaces of the tines. A side electrode of one tine is electrically connected by an overlapping joint with a planar electrode of the other tine.
摘要:
A piezoelectric resonator assembly comprises a single integral plate which is cut to form a peripheral region for supporting a resonator, a central resonating region for resonating in the longitudinal mode, surface-shear mode, or bending mode, and at least two oppositely positioned arms for fastening the peripheral region to the central region at opposite points on the central resonating region. The arms are positioned at nodal zones of the central resonating region. There is a single gap between the peripheral region and the central resonating region at each position about the central resonating region except at the positions of the arms. The entire upper and lower surfaces of the plate are continuous and have metal plates formed thereon for forming the excitation electrodes of the central resonating region. The metallized plates are attached to leads at the peripheral region. Upper and lower cover elements are also attached to the metallized plates at the peripheral region for covering the central resonating region.