JPH02262708A - Small crystal resonator - Google Patents

Abstract

PURPOSE:To stabilize the characteristic of a crystal resonator inside by providing an edge part for reinforcement at the side plane of the inside of a container, and increasing the mechanical strength of the container in a bending direction easiest to receive the influence of distortion. CONSTITUTION:The container 2 is rectangular bottomed one consisting of ceramic, etc., and resonator 1 made of crystal is housed fixedly with a conductive bonding agent, etc., on a difference in step 6 provided in the container. A long edge part 5 for reinforcement is provided in a direction in parallel with the crystal resonator 1 along the side plane 2' of the container 2. Thus, by providing the edge part 5 for reinforcement, the mechanical strength of a case, especially, flexural strength can be increased, therefore, the distortion generated due to the difference of a coefficient of thermal expansion with a substrate when heating and packaging can be prevented occurring, and the crystal resonator in which the deterioration of the characteristic can be prevented occurring can be obtained when packaging.

Description

[Detailed Description of the Invention] [Field of Industrial Application] In response to the recent demands for smaller, thinner, and more accurate electronic equipment, the present invention relates to a crystal oscillator that generates a reference signal. It provides a child unit,
In particular, the present invention relates to a technique for increasing the mechanical strength of a crystal resonator unit against stress generated when the unit is mounted on a substrate.

[Summary of the Invention] The present invention provides reinforcing edges on both sides of the interior of a container that fixes and accommodates a crystal resonator, so that when a crystal resonator unit is mounted on a board, the crystal resonator unit can be mounted on a board. This is to prevent stress caused by the difference in thermal expansion coefficient between the unit and the substrate from affecting the characteristics of the crystal resonator as much as possible.

[Prior Art] FIG. 4 is a sectional view of the crystal resonator unit 10 viewed from the side. As shown in the figure, the conventional crystal resonator unit 10
The component 10 is constructed by sandwiching a washer-shaped sealing material 4 such as solder between a storage container 2, which has only a step 6 for fixing the crystal resonator 1 therein, and a lid 3, and placing it in a vacuum atmosphere. The sealing material 4 was heated inside to melt the sealing material 4, thereby joining and sealing the two.

[Problems to be Solved by the Invention] However, when this unit 10 is mounted on a substrate (not shown) using solder or the like, stress is generated on the unit due to the difference in coefficient of thermal expansion between the unit 10 and the substrate. As a result, mechanical distortion occurs, deteriorating the electrical characteristics of the unit 10, and sometimes causing the unit 10 to break.The present invention solves this problem by providing a strong crystal resonator unit. The purpose is to

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a device in which a crystal resonator is fixed to a step provided in a container, and an upper part of the container is sealed with a lid. Providing reinforcing edges on both sides of the interior of the container increases the strength of the container, thereby stabilizing the characteristics of the crystal resonator inside.

[For 1] This is to alleviate thermal distortion that occurs when the unit is mounted on a board, and its feature is that a reinforcing edge is provided on the inside side of the container, and the bending direction of the container is the most susceptible to distortion. It increases the mechanical strength of

[Example] An example of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. 1 is a cross-sectional view of the present invention viewed from the side. The container 2 is a rectangular bottomed container made of ceramic or the like, and a quartz crystal is placed on top of a step 6 provided in the container with a conductive adhesive or the like. A more processed vibrator 1 is fixed and housed. This is the same as the conventional structure, but in the present invention there is a long reinforcing edge 5 along the side surface 2' of the container 2 in a direction parallel to the crystal l.

FIG. 3 is a sectional view from the front, and FIG. 4 is a plan view of the container 2 before fixing the crystal resonator l. Although this edge 5 is depicted at a different height from the stepped portion 6 of the container 2 for fixing the vibrator 1, it may be at the same height or may be higher than the fixing portion. The gist is that the function and purpose of the present invention can be sufficiently achieved as long as the position and height do not touch the vibrating part of the fixed vibrator 1.

Providing the reinforcing edge 5 in this way increases the mechanical strength, especially the bending strength, of the case, thereby making it possible to prevent distortion caused by the difference in thermal expansion coefficient between the case and the board during heat mounting. , we were able to create a crystal resonator whose characteristics were prevented from deteriorating during mounting.

〔Effect of the invention〕

As explained above, even if stress is applied to the container, the present invention is provided with a reinforcing part that resists it, so the actual mechanical strain that occurs can be minimized, so it has characteristics that do not deteriorate even after mounting. A crystal resonator with good performance can be obtained, and in particular, the series resonant resistance can be kept low and the long-term reliability of the resonator itself can be ensured, showing great effects.

・Encapsulation material 5・ ・Edge 6 ・ ・ ・ Step that's all Applicant: Seiko Electronic Components Co., Ltd.

Claims (1)

[Claims] A compact device in which a crystal resonator is fixed to a step provided in a container and the upper part of the container is sealed with a lid, characterized in that reinforcing edges are provided on both sides of the interior of the container. Crystal oscillator.