JPS6084002A - Oscillator - Google Patents

Abstract

PURPOSE:To offer an oscillator with small size, suitable for mass-production, and with excellent electric characteristic by placing a piezoelectric vibrator chip and an IC chip of an integrated circuit constituting an oscillator circuit while they are arranged along the lengthwise direction of a dual line package. CONSTITUTION:The vibrator chip 13 is contained in the package 11 while the chip 13 formed longer in the X direction is allowed to correspond to the lengthwise direction of the package 11. The dimension of the vibrator chip is selected as a/h>45, c/h>10, where (a) is the length in the X axis, (c) is the length in the Z axis and (h) is the thickness in the Y axis. Then the integrated circuit IC chip 14 constituting the oscillation circuit is provided next to said vibrator chip 13 along the lengthwise direction in the package 11, electrodes of the oscillation circuit led out to both ends of the vibrator chip 13 in the lengthwise direction, the IC chip 14 and terminals 12 are connected and applied with continuity respectively by soldering, thermocompression bonding or wire bonding or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscillator in which a rectangular and elongated vibrator element and an IC'f-horn of an integrated circuit are housed in a holder.

General (-Piezoelectric vibrators are extremely important electronic components as frequency standards or time standards because their vibration frequency is It's being used.

Conventionally, most piezoelectric vibrators have been manufactured using a lip-shaped holding member 1 (a two-pressure abrasive vibrator stack 2 is sandwiched between the electrodes 3 and the holding portion 1), as shown in FIG. Same as Agent 4, it was common to maintain and maintain constant velocity.
The holding part 1 is soldered to the external 31 output terminal 6 of the cage 5, and the gold ID4rA cap, 7 is attached to the cage 5.
'7 was covered and sealed.

However, misalignment when inserting the piezoelectric vibrator system piece 2 into the holding member J and the amount of 1Ji of the three conductive adhesives have a large effect on the electrical characteristics of the vibrator, so this work is difficult. requires considerable skill and is considered impossible to automate.
This was a factor that influenced the price of the product.

In addition, when configuring an oscillator using such a piezoelectric vibrator with a frequency of was large and difficult to adjust.

The present invention has been made in view of the above circumstances, and uses a rectangular piezoelectric vibrator element piece and a dual in-line type elongated case, which is widely used as a cage and an integrated circuit case. integrated circuit with piezoelectric vibrator
The object of the present invention is to provide an oscillator that has a small occupied space by housing a C chip, is suitable for automation of manufacturing processes, and is inexpensive.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3.

By the way, it is well known that the direction of displacement in thickness shear vibration of an AT-cut crystal resonator is the X-axis direction.

In addition, the displacement distribution of the anisotropic to thickness shear vibration of the crystal itself is elongated and distorted in the X-axis direction, so changing the length in the 27-axis direction to shorten it will not affect the electrical characteristics.
1 not. However, the dimension in the X-axis direction, which is the displacement direction, is (
If the temperature is increased, the characteristics will deteriorate rapidly. Figure 2(a) l
(1)) shows the relationship between the change in the Q value and the change in the contour dimension of an AT-cut crystal resonator.

Figure f=) is a cut out of the lL4 schematic diagram of the crystal piece.
The dimension in the X-axis direction is a, the dimension in the 27th direction is c, and the thickness in the y-axis direction is h. 2(h) shows the dependence of Q on the dimension a in the X-axis direction, and FIG. 2(C) shows the dependence of Q on the dimension C in the Z'-axis direction. As is clear from FIG. 2, if 2/J1/40°c/h-:10 is selected, electrical characteristics comparable to those of a large crystal piece can be achieved. Therefore, if the conditions of a/h:)40 and C/h>10 are satisfied depending on the size of the cage, a crystal resonator having good electrical characteristics can be obtained.

In this way, the X of the crystal piece! When storing a rectangular crystal resonator whose profile dimensions in the h11 and Z' axis directions have a ratio of l:4, a similarly rectangular crystal resonator, for example! A dual in-line cage, which is standardized as a container for a 1-microcircuit circuit, is optimal.

FIG. 3 is a perspective view showing an embodiment in which the vibrator of the above embodiment is housed in a dual in-line type holder together with an IC chip of an integrated circuit constituting an oscillation circuit. That is, the dual in-line type retainer 11 has an elongated external shape and is located in the longitudinal direction, with a plurality of terminals 12 provided on both sides.

A vibrator element piece 13 is formed into an elongated shape in the X-axis direction along the longitudinal direction of the cage 1 as shown in FIG.
Store them with their lengths aligned. Note that this vibrator element piece 13 is electrically and mechanically held by metallizing the longitudinal end portion of the stepped portion provided inside the holder 1 .

An IC chip 14, which is an integrated circuit, is arranged in the holder IJ in the longitudinal direction and arranged in line with the vibrator element piece 12 to form an oscillation circuit. Then, the electrodes 47 protruding from both ends of the vibrator element 12 in the longitudinal direction of the oscillation circuit, the IC 7''' nogs 141d, and the terminals 12 are connected to each other by soldering, thermocompression bonding, wire mending, or the like to establish continuity.

In this way, all the members constituting the oscillation circuit can be contained in the dual in-line type holder 11. Therefore, such an oscillation circuit can be automatically inserted into a circuit board in the same way as various ICs, LSIs, etc., and productivity in the assembly process can be luxuriously increased. Furthermore, the exclusive area occupied by the oscillation circuit on the circuit board can be reduced, contributing to the miniaturization of electronic equipment. Furthermore, since the resonator element piece 11 and the IC chip 14 are combined to form an excavation circuit, there is little variation in electrical characteristics and no adjustment is required, the cost is low θ, and it is suitable for rat production.

It goes without saying that the piezoelectric vibrator to which the present invention is applied is not limited to piezoelectric crystals such as quartz crystal, tantalum oxide, niobium ribbed lithium, etc., but also piezoelectric ceramics and the like can be used.

As described in detail above, according to the present invention, an elongated vibrator element that can be miniaturized without impairing electrical characteristics, an IC chip of an integrated circuit constituting an oscillation circuit, and the first element of a dual in-line type retainer. Since the oscillators are arranged side by side along the direction, it is possible to provide an industrially useful oscillator that is small in size, has a wrinkled shape, has good r(z) characteristics, and is industrially useful.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional piezoelectric vibrator, and Figure 2 (a
), (b), ((:)) FIG. 3 is a diagram for explaining the principle of the vibrator of the present invention, and is a perspective view showing an embodiment of the present invention. 11°°・retainer, 12... tin; child, 13... cable element piece, 14... ZCy-tube. Fig. 1 Fig. 3 Fig. 2 (a) % 1 % Procedural Arrest Book Sakikoku IV, Hn ``4.11 i,, + Paste 'lIj' Administrative Agency & 1 Mr. Shiga Manabu ■, ↓j Displaying 1 item Ei (Grant No. 59-13R1548 2, Name of the invention Oscillator 3, Person making the amendment 1) Relationship with 1 case Special! October 30th fi) 11iil 2 Subject Full text of specification 7 Contents of amendment As per the engraving and attachment of specification 11) which originally mentioned the deceased (no changes to the content)

Claims (1)

[Claims] The thickness in the Y-axis direction is h1, and the length in the X-axis direction is a. If the length in the Z' axis direction is C, then a/h>4o. A rectangular transducer element elongated in the X-axis direction that excites shear vibration with a thickness of C/h>10, and a plurality of terminals with an elongated external shape and on both sides in the longitudinal direction of this transducer element. a holder having a stepped portion for holding an end of the oscillator; and an integrated circuit IC disposed in the holder in parallel with the vibrator element in the longitudinal direction and constituting an oscillation circuit together with the oscillator element. An oscillator comprising a chip.