JPS622723B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crystal resonator container and manufacturing method.

The crystal oscillators used in crystal oscillation watches are becoming smaller year by year, and as the parts become smaller, manual labor becomes more complicated and costs inevitably become higher. In addition, phenomena such as deterioration of reliability such as airtightness of the container were also observed.

The present invention aims to reduce the cost of a smaller and thinner crystal resonator container without impairing its reliability.

The structure of the present invention will be explained step by step with reference to FIGS. 1 to 4 according to the manufacturing process. Figures 1 to 3
The figures up to this figure show the manufacturing process of the case, which is a component of the container, and FIG. 4 shows the cover, which is a component of the container.

Figure 1 shows case 1 in the middle of the manufacturing process, where the shape was processed by etching from a thin metal plate such as Kovar.
Figure A is a plan view of the unfinished product, and Figure B is its AA cross-sectional view. The external transport portion is etched from both sides, and has a half-opening groove 1a.
is etched from one side of the gold side thin plate, and the etching process is completed midway through, resulting in a half-cut groove 1a shaped like a groove. Figure 2 is a diagram showing the state of the next process, where Figure A is a plan view and Figure B is a BB sectional view of Figure A. As shown by diagonal lines in the half-opening groove 1a, glass powder made of Kovar glass or the like is compressed and embedded and fired to form an insulating part 2 sealed to the case 1. Figure 3 shows the completed form of Case 1. Figure A is a plan view, and Figure B is the same as Figure A.
The CC cross-sectional view and the C figure are the DD cross-sectional views of Figure A. In this case, the thin metal plate constituting the case 1 is etched from the opposite side of the half-open groove 1a, so that the remaining thickness of the half-open groove 1a is removed. As a result, the two lead terminals 3 and the case 1 are insulated, and a recess 1c for accommodating the crystal piece is formed.

The construction of the invention is completed in FIG.
In other words, the main body 1b of the case 1 and the lead terminals 3 are made of the same material and are integrally connected via the insulating part 2.

Figure 4 is a diagram of the completed container according to the present invention, where Figure A is a plan view, Figure B is a sectional view of EE in Figure A, Figure C is a sectional view of FF in Figure A, 5 is a cover, and 6 is a tuning fork-shaped crystal. The case 1 and cover 5 are hermetically sealed by soldering or the like.

As shown in FIG. 5, the advantage of the present invention is that when manufacturing the case 1, a plurality of cases can be handled at the same time by processing the thin metal strip 7, thereby reducing manufacturing costs.

Also, as is clear from Figures 1 and 2, the half-opening groove 1
Since the widths g and G of part a can be made narrower, it is not only advantageous for downsizing, but in terms of airtight leakage, the air circulation area can be made smaller, so the circulation length l can be reduced.
can be made shorter.

In addition, the lead terminals 3 are etched and processed based on the external shape of the case 1, so the shape and positioning accuracy is very good.In particular, since there is no difference in level at the part 8 where it joins with the crystal piece, the joining strength of the crystal piece can be obtained and the position can be adjusted. Accuracy is also easy to obtain. It is also clear that the container itself can be made very thin.

[Brief explanation of the drawing]

Figure 1 A, B to Figure 3 A, B, and C illustrate the manufacturing process of a case showing an embodiment of the present invention. Figure 1 A is a plan view, and Figure 1 B is a cross section AA of Figure A. Figure 2A is a plan view, Figure 2B is a BB sectional view of Figure A, Figure 3A is a plan view, Figure 3B is a CC of Figure A.
3C is a DD cross-sectional view of Figure A, and Figures 4A, B, and C show the container for the crystal resonator according to the present invention. Figure A is a plan view, and Figure B is a EE of Figure A. The cross-sectional view, Figure C is a FF cross-sectional view of Figure A, and Figure 5 is an explanatory view showing the manufacturing process of the case. DESCRIPTION OF SYMBOLS 1... Case, 1a... Half cutout groove, 1c... Recessed part, 2... Insulating part, 3... Lead terminal, 5... Cover, 6... Tuning fork type crystal piece.

Claims (1)

[Scope of Claims] 1. A container for a crystal resonator, characterized in that lead terminals of the container for the crystal resonator and the case are formed from the same material. 2. A method for manufacturing a crystal oscillator container, including a step of forming a half-open groove by etching a thin metal plate, a step of sealing an insulating part in the half-open groove, and a step of sealing an insulating part in the half-open groove. Forming a recess in the thin metal plate by etching the thin metal plate from the opposite side,
A method for manufacturing a container for a crystal resonator, comprising the step of removing the remaining thickness of the half-blank groove to form a lead terminal portion.