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JPS61258517

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DESCRIPTION JPS61258517
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
compact piezoelectric vibrator which is excellent in mountability and is resistant to ultrasonic
cleaning. [Summary of the invention] The present invention is a piezoelectric vibrator, attached to
the piezoelectric oscillation piece all reinforcing plate, and at a portion within 1/6 of the
dimension of the reinforcing plate in the longitudinal direction on the base of this reinforcing
plate enclosure. By fixing, the ultrasonic cleaning is strong and miniaturized. [Prior Art] A
conventional piezoelectric vibrator is shown in a front sectional view in FIG. 2 by taking a
rectangular AT quartz piezoelectric vibrator as an example. 21 is a rectangular AT quartz
oscillator piece, connecting portion 26.26 'is provided by total evaporation of metal such as Au
so as to surround the end face and the back face connected to the excitation electrode 22.22' and
the excitation electrode on the front and back surfaces There is. Reference numeral 24 denotes a
reinforcing plate which is made of an insulating material such as quartz and has a thermal
expansion coefficient equal to or close to the thermal expansion coefficient of the rectangular AT
quartz light emitting piece 21. Support has support 25.25?5.25. A conductive portion 26.26 'is
provided by conductive adhesive or the like from the top of the support portion 25.25' to the end
face of the reinforcing plate 24. The rectangular AT quartz oscillator piece 21 is also fixed to the
support portion 25.25 'of the reinforcing plate 24 by a conductive adhesive 27.27'. Reference
numeral 28 denotes a base of the envelope, and the reinforcing plate 24 to which the rectangular
AT quartz crystal oscillating piece 21 is attached is reinforced by a spring 31.31 'provided on the
base 28]. It is fixed by pushing '. The springs 29 of the base 28 are connected to electrodes 29.
29 'provided at both ends of the back surface, and the case 30 is completely covered on the base
28 to complete the rectangular AT quartz oscillator. [Problems and Problems to be Solved by the
Invention] In the conventional piezoelectric vibrator, in order to use a spring, after soldering and
fixing to a circuit board in order to use a spring, it is against ultrasonic cleaning which is usually
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used. , '' Of the auxiliary plate and the spring: distortion occurs in the following part, the whole
image frequency becomes unstable, and also the use of Noge Nee (the only part of the size, the
dimension in the planar direction becomes large, It has the disadvantage that the outer shape is
large. The present invention solves all the problems of the prior art, and its object is to provide
an ultrasonic cleaning [strong, small-sized piezoelectric vibrator. [Means for Solving the
Problems] The piezoelectric vibrator of the present invention is a) a piezoelectric oscillation piece
11 having all excitation electrodes on the front and back, a reinforcing plate C fixing all ends of
the piezoelectric oscillation piece C) a piezoelectric oscillation piece all It fixes to the base of the
partial whole envelope within 1/6 of the length direction (sigma) dimension of the fixed
reinforcement board. d) All features consist of the above configuration. [Operation] According to
the above configuration of the present invention, since the pressure-excavated piece is fixed to
the reinforcing plate and the reinforcing plate is fixed to the airtight container in the receiving
area, the thermal expansion of the piezoelectric) # 5 coupon While maintaining high precision all
over without affecting, it is possible to provide ultrasonic vibration, cleaning resistant, and smallsized piezoelectric vibration hammer.
FIG. 1 (a) is an entire front sectional view of an example of a rectangular AT quartz vibrator as an
example of the piezoelectric vibrator of the present invention, and FIG. 1 b is a plan sectional
view of the rectangular AT quartz vibrator. . 1 is a rectangular AT quartz crystal piece, and the
connection portion 3.6 'is surrounded by Ag, Or, Au, C! On the front and back surfaces so as to
surround the excitation electrode 2.2' and the end surface to be connected to the excitation
electrodes. All metal deposition such as u, etc. is provided by sputtering or the like. In FIG. 1 (4
shown in cl is a crystal, glass, ceramic, etc., the thermal expansion coefficient is cut out at the
same cut angle as that of rectangular AT quartz oscillator 1, preferably close to that of
rectangular AT quartz oscillator 1. It is a reinforcing plate made of an insulating material such as
quartz, and has on its surface a support portion 5.5 'for supporting both ends ?) connecting
portion 6.3' of the rectangular AT crystal oscillation piece 1. The support portion 5.5 'is provided
by machining such as cutting off at the time of forming the reinforcing plate 4, photoetching, etc.,
or the reinforcement & 4 is made of the same material as that of the other material or other
material completely bonded. good. From the top of the support portion 5.5 ? to the central
portion of the side surface of the reinforcing plate 4, conductive adhesive, silver-palladium
conductor paste module, deposition of Ag, Or, Au etc., sputtering, etc. (Conductive portion 6.61
from C Is provided. The rectangular AT quartz crystal oscillation piece 1 is connected to the
reinforcing plate 4 and the connection portion 3.6 'of the support portion 5.5' and the
rectangular AT quartz crystal oscillation piece 1 with a conductive adhesive, solder etc. It is fixed
by '. In FIG. 1 (8 shown in di is a base of the envelope and is made of ceramic, synthetic resin
such as epoxy, glass, etc. Electrodes 9.9 'provided on the both sides of the back surface of the
base 8 by W, Mo metallized etc. on the whole plating N1, Pb-8n etc. by ?) method and the
connection section 10 up to the surface center -5 part .10 'is provided. Adhesives such as epoxy,
low melting point glass in the central part of base 8 at the center part of base 8 at the center part
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of base 8 with the central part of the lower surface of rectangular crystal AT piece 1 fixed to
quartz crystal oscillation piece 1 Fix with 11 and so on. At this time, it is desirable that the
reinforcing plate 4 and the base 8 have a gap, and if necessary, a spacer of quartz, glass, ceramic,
metal or the like may be inserted at the time of fixing. Connect the central part of the conductive
part 6.6 'of the reinforcing plate 4 and the central part of the surface of the connection part
10.10' of the base 8 with a filtering material 12.12 'such as conductive adhesive, solder, etc. Take
the food. A case 16 made of ceramic, glass, metal or the like is put on the periphery of the base 8
and fixed by an adhesive, low melting point glass, filtration or the like to complete a rectangular
AT quartz oscillator. In the present embodiment, the central portion of the lower surface of the
reinforcing plate is fixed, but the lower surface may be fixed to the lower surface without any
problem or may be fixed to the left or right. Not only the rectangular AT quartz crystal shown,
but also quartz vibrators of other vibration forms or lithium tantalate with other force copy
forms, lithium tantalate, lithium heptagon, ceramic, etc. good.
[Invention ?] Effect As described above, according to the present invention, the piezoelectric
oscillation piece is fixed to a reinforcing plate whose thermal expansion is close to or equal to
that of the piezoelectric oscillation piece, and the bearing area of the reinforcement pk enclosure
is Since the reinforcing plate and the piezoelectric oscillation piece are rigidly fixed to the base
even when the ultrasonic wave is applied by solidifying 71tf, breakage of the piezoelectric
oscillation piece due to unnecessary collision, connection ?) reliability does not decrease. A
piezoelectric vibrator excellent in ultrasonic resistance can be provided. In addition, for the same
reason, it is possible to provide a piezoelectric ?smaller? whose outer shape is smaller because
it does not have extra things such as a spring. As described above, the present invention ?)
piezoelectric vibrator is collapsed to the mounting property, and it is to be made specific to the
recent trend of chip formation.
[0002]
Brief description of the drawings
[0003]
FIG. 1 (al is a front sectional view of a rectangular A, T quartz oscillator as an example of a
piezoelectric oscillator according to the present invention.
FIG. 1 (bl is a plan sectional view of a rectangular AT quartz oscillator. FIG. 1 (cl is a perspective
view of a reinforcing plate. 1 (d) is a perspective view of a base ?). 1 иии Rectangular AT quartz
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crystal oscillating piece 4 и и и Reinforcing plate 8 и и и и Base Fig. 2 is a front sectional view of a
rectangular A-shaped quartz crystal 4 vibrator as an example of a conventional piezoelectric
vibrator. 24 иии Reinforcing plate 28 иии Base 61.31 ? и и и Spring. that's all
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