JPH02288715A - Crystal resonator - Google Patents

Abstract

PURPOSE:To safely support a crystal chip whose thickness is thin without giving a damage thereto by forming a central electrode to a midposition of one plate face of a crystal plate for a base cut in the same cut angle as that of a crystal resonator, forming a side electrode respectively to both sides and opposing one side plate face of the base crystal plate to the other side plate face of the crystal resonator while keeping a minute interval. CONSTITUTION:A base crystal plate 14 is cut with the same cut angle as that of a crystal resonator 11, and a central electrode 15 is formed only to one side plate face at its midposition in the vertical direction with a thickness offering sufficient mechanical strength and a side electrode 16 is formed respectively to both sides. Then one side plate face of the base crystal plate 14 is opposed to the other side plate face of the crystal resonator 11 while leaving a minute gap, e.g. a conductive adhesives 17 is used to adhere the common electrode 12 of the crystal resonator 11 to the central electrode 15, input output electrodes 13, 13 are connected respectively to side electrodes 16, 16 and supported mechanically. Thus, the reliability is high because no damage such as crack or chipping is caused and the handling at the assembling is facilitated and the resonator is suitable for automatic assembling and mass-production.

Description

【発明の詳細な説明】 （発明の技術分野） 本発明は、組立が容易で、欠損を生じ難く、特性の良好
な水晶共振器に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a crystal resonator that is easy to assemble, is hard to cause defects, and has good characteristics.

（発明の技術的背景とその問題点） 従来の水晶振動子の保持構造は、たとえば第２図に示す
ように一対のリード端子１．１を互いに絶縁してベース
２に植設し、各リード端子ｌの先端部に保持！Ｉ３の一
端を取着し、この保持線３の他端にクリップを形成して
いる。そして水晶の結晶を所定角度に切断、研磨した後
その板面に電極を形成した水晶片４を上記クリップによ
って挟持するとともにその板面の電極を上記リード端子
ｌを介して外部へ導出するようにしている。そしてベー
ス２にカバー５をかぶせて真空あるいは不活性ガス等を
充填して気密に封止するようにしている。(Technical background of the invention and its problems) In the conventional holding structure for a crystal resonator, for example, as shown in FIG. 2, a pair of lead terminals 1.1 are insulated from each other and planted in a base 2, Hold at the tip of terminal l! One end of the holding line 3 is attached, and a clip is formed on the other end of the holding line 3. After cutting and polishing the crystal at a predetermined angle, the crystal piece 4 with electrodes formed on its plate surface is held between the clips, and the electrodes on the plate surface are led out to the outside through the lead terminal l. ing. Then, the base 2 is covered with a cover 5 and filled with a vacuum or an inert gas to seal it airtight.

しかしながらこのようなものでは、たとえは厚み滑り水
晶振動子のように厚みによって共振周波数が定まるもの
では、周波数が高くなるとともに水晶片の厚みも著しく
薄くなり、このため水晶片の機械的強度が低下して割れ
、欠は等の損傷を発生し易くなる問題があった。However, in such devices, for example, in devices where the resonant frequency is determined by the thickness, such as a thickness-slip crystal resonator, as the frequency increases, the thickness of the crystal piece becomes significantly thinner, which reduces the mechanical strength of the crystal piece. There was a problem in that it was more likely to cause damage such as cracking and chipping.

また、たとえばモノリシック形のフィルタの場合、周波
数が高くなるとともに形状も極端に小さくなり、たとえ
ば通過帯域が１００ＭＨ２程度のフィルタでは外形形状
は４＋ｎｍＸ２．　５ｍｍ程度になるために、厚みが薄
く破損し易いことと相俟て組立時の取扱もきわめて面倒
である。For example, in the case of a monolithic filter, as the frequency increases, the shape becomes extremely small. For example, a filter with a pass band of about 100 MH2 has an external shape of 4+nm x 2. Since it is approximately 5 mm thick, it is thin and easily damaged, and handling during assembly is also extremely troublesome.

（発明の目的） 本発明は、上記の事情に鑑みてなされたもので、厚みの
薄い水晶片も損傷することなく安全に保持することがで
き信頼性も高く、組立も容易で、特性の良好な水晶共振
器を提供することを目的とするものである。(Objective of the Invention) The present invention has been made in view of the above circumstances, and is capable of safely holding a thin crystal piece without damaging it, is highly reliable, easy to assemble, and has good characteristics. The purpose of this invention is to provide a crystal resonator with a high quality.

（発明の概要） 本発明は、水晶の結晶から所定角度に切断し一側板面に
共通電極を形成し他側板面に互いに分離して人力電極お
よび出力電極を形成した水晶共振子と同じ切断角度に切
断した基台用水晶板の一側板面の中央部分に中央電極を
形成し両側にそれぞれ倒部電極を形成し、この基台用水
晶板の一側板面と４ヒ記水晶共振子の他側板面を微小な
間隙を存して対面させ上記水晶共振子の共通電極を中央
電極に入出力各電極を各倒部電極に接続するとともに機
械的に導電剤で保持し、ベースに植設した少なくとも３
本の端子の先端部に取着したサポート部材で上記基台用
水晶板の少なくとも３点を保持するとともに各電極を外
部へ導出することを特徴とするものである。(Summary of the Invention) The present invention has the same cutting angle as a crystal resonator in which a quartz crystal is cut at a predetermined angle, a common electrode is formed on one side plate surface, and a manual electrode and an output electrode are formed by separating them from each other on the other side plate surface. A center electrode is formed at the center of one side surface of the crystal plate for the base cut, and tilted electrodes are formed on both sides. With the side plates facing each other with a small gap, the common electrode of the crystal resonator was connected to the center electrode, and each input/output electrode was connected to each bent electrode, mechanically held with a conductive agent, and implanted in the base. at least 3
The present invention is characterized in that at least three points of the base crystal plate are held by a support member attached to the tip of the book terminal, and each electrode is led out to the outside.

（実施例） 以下、本発明の一実施例を第１図に示す正面図を参照し
て詳細に説明する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the front view shown in FIG.

図中１１は水晶の結晶から所定角度に切り出して板状に
整形した水晶共振素子である。この水晶共振子１・ｌの
一側板面には第２図（ａ）に示すように共通電極１２を
形成して上端縁へ導出し、他側板面には第２図（ｌ〕）
に示すように、たとえば上記共通電極１２に略対応する
位置に所定の間隙を存して入力電極１３および出力電極
１３を形成してそれぞれ両側部へ導出している。In the figure, reference numeral 11 denotes a crystal resonant element cut out from a quartz crystal at a predetermined angle and shaped into a plate shape. A common electrode 12 is formed on one side plate surface of the crystal resonator 1/l and led out to the upper edge as shown in FIG. 2(a), and a common electrode 12 is formed on the other side plate surface as shown in FIG. 2(l).
As shown, for example, an input electrode 13 and an output electrode 13 are formed with a predetermined gap at a position substantially corresponding to the common electrode 12, and are led out to both sides.

モして１４は基台用水晶板で上記水晶共振素子と同じ切
断角度に切断し、かつ機械的に十分な強度を有する厚み
で、第３図に示すように一側板面だけに、その中央部に
上下方向に中央電極１５を形成し、両側部にそれぞれ倒
部電極１６を形成している。なお中央電極１５の幅は少
なくとも上記入出力電極１３間の間隙の幅よりも大きく
している。Reference numeral 14 is a crystal plate for the base, which is cut at the same cutting angle as the crystal resonant element and has a thickness that has sufficient mechanical strength. A central electrode 15 is formed in the vertical direction on the part, and tilted part electrodes 16 are formed on both sides. Note that the width of the center electrode 15 is made larger than at least the width of the gap between the input and output electrodes 13.

そして、基台用水晶板１４の一側板面に上記水晶共振子
１１の他側板面を微小な間隙を存して対面させ、たとえ
は導電性接着剤１７で水晶共振子１１の共通電極１２を
中央電極１５に接続し、入出力電極１３．１３をそれぞ
れ倒部電極１６．１６に接続するとともに機械的に保持
するようにしている。なお上記導電性接着剤１７に微細
なガラスピーズ等のフィラーを混入しておくことにより
Ｌ記水晶基台１４に水晶共振子１１を固着する際に、そ
の間に容易に微小な間隙を保つことができる。Then, the other side plate surface of the crystal resonator 11 is made to face one side plate surface of the base crystal plate 14 with a small gap, and the common electrode 12 of the crystal resonator 11 is bonded with a conductive adhesive 17, for example. The input/output electrodes 13.13 are connected to the central electrode 15, and the input/output electrodes 13.13 are connected to the bent electrodes 16.16, respectively, and are mechanically held. By mixing a filler such as fine glass beads in the conductive adhesive 17, it is possible to easily maintain a small gap when fixing the crystal resonator 11 to the L crystal base 14. can.

そして１８はベースで、たとえば金属板を小判型にプレ
ス整形し、３本の端子１９を貫装してハーメガラス等を
充填して固着し、各端子１９の先端部に板状のサポート
部材２０を取着している。Reference numeral 18 denotes a base, for example, a metal plate is press-shaped into an oval shape, three terminals 19 are inserted therethrough, hermetically sealed glass or the like is filled and fixed, and a plate-shaped support member 20 is attached to the tip of each terminal 19. It is installed.

そして各サポート部材２０を上記基台用水晶板１４の各
電極１５．１６．１６に、たとえば導電性接着剤２１に
よって固着するとともに機械的に保持するようにしてい
る。Each support member 20 is fixed to each electrode 15, 16, 16 of the base crystal plate 14 by, for example, a conductive adhesive 21 and is mechanically held.

なお、ベース１８には第４図と同様に図示しないカバー
をかぶせて気密に封止するようにしている。Note that the base 18 is covered with a cover (not shown) to airtightly seal it, as in FIG. 4.

このような構成であれば、水晶共振子１１は基台用水晶
板１４に取着して１呆持するようにしているので割れ、
欠は等の損傷を生じることなく信頼製も高く、しかも組
立時の取扱も容易で自動組立、大量生産等にも適する。With such a configuration, the crystal resonator 11 is attached to the base crystal plate 14 for one pause, so it will not break or break.
It is highly reliable without causing any damage such as chips, and is easy to handle during assembly, making it suitable for automatic assembly, mass production, etc.

さらに水晶共振子１１の入出力電極１３の特に間隙の部
分は共通電極１２と同電位の中央電極１５に微小な間隙
を存して対面、しているので、人出力量の結合を極めて
少なくでき十分な補償減衰量を得ることができ電気的な
特性を向上することができる。Furthermore, since the input/output electrode 13 of the crystal resonator 11, especially the gap portion, faces the common electrode 12 and the central electrode 15, which has the same potential, with a small gap, coupling of the amount of human output can be extremely reduced. A sufficient amount of compensation attenuation can be obtained and electrical characteristics can be improved.

なお、本発明は上記実施例に限定されるものではなく、
たとえば上記実施例では水晶共振子１１は小判形、基台
用水晶板１４は丸形のものについて説明したが、矩形状
等適宜な形でもよいことは勿論である。Note that the present invention is not limited to the above embodiments,
For example, in the above embodiment, the crystal resonator 11 is oval-shaped and the base crystal plate 14 is round. However, it goes without saying that they may be of any suitable shape, such as a rectangular shape.

（発明の効果） 以上詳述したように、本発明によれば組立が容易で欠損
を防止でき、しかも電気的特性も良好な水晶共振器を提
供することができる。(Effects of the Invention) As described in detail above, according to the present invention, it is possible to provide a crystal resonator that is easy to assemble, can prevent damage, and has good electrical characteristics.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す正面図、第２図（ａ）
、第２図（ｂ）は本発明の上記実施例の水晶共振子の表
及び裏板面の電極形状を示す正面図、 第３図は本発明の上記実施例の基台用水晶板の板面の電
極形状を示す正面図、 第４図は従来の水晶振動子の一側を示す組立斜視図であ
る。 ｌ　１　・　・　− １２・　会　・ １３　・　・　９ １４・　・　・ ｌ　５　・　・　・ １６　Φ　・　・ １７、２１ １８・・壷 １９φ　・　・ ２０　・　φ　・ ・水晶共振子 ・共通電極 ・入出力電極 ・基台用水晶板 ・中央電極 ・倒部電極 ・導電性接着剤 ・ベース ・端子 ・サポート部材 第１図 第４図 第２ｍ （ａ） （ｂ） 第３５！！Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2(a)
, FIG. 2(b) is a front view showing the electrode shapes of the front and back plates of the crystal resonator of the above embodiment of the present invention, and FIG. 3 is a plate of the crystal plate for the base of the above embodiment of the present invention. FIG. 4 is an assembled perspective view showing one side of a conventional crystal resonator. l 1 ・ ・ - 12・ Meeting ・ 13 ・ ・ 9 14 ・ ・ ・ l 5 ・ ・ ・ 16 Φ ・ ・ 17, 21 18... Jar 19φ ・ ・ 20 ・ φ ・ ・Crystal resonator, common electrode, input/output Electrode, crystal plate for base, center electrode, tilted electrode, conductive adhesive, base, terminal, support member Figure 1 Figure 4 Figure 2m (a) (b) 35th! !

Claims (1)

【特許請求の範囲】 　水晶の結晶から所定角度に切断し一側板面に共通電極
を形成し他側板面に互いに分離して入力電極および出力
電極を形成した水晶共振子と、この水晶共振子と同じ切
断角度で切り出し一側板面の中央部分に中央電極を形成
し両側にそれぞれ側部電極を形成した基台用水晶板と、 この基台用水晶板の一側板面に微小な間隙を存して上記
水晶共振子の他側板面を対面させて上記水晶共振子の共
通電極を中央電極に接続し入出力各電極を各倒部電極に
接続するとともに機械的に保持する導電剤と、 上記基台用水晶板の少なくとも３点を保持するとともに
各電極を外部へ導出するサポート部材と、ベースに植設
した少なくとも３本の端子の先端部に取着したサポート
部材と、 を具備することを特徴とする水晶共振器。[Scope of Claims] A crystal resonator which is cut from a crystal at a predetermined angle and has a common electrode formed on one side plate surface and an input electrode and an output electrode separated from each other on the other side plate surface, and this crystal resonator. A crystal plate for a base is cut out at the same cutting angle and a center electrode is formed in the center of one side plate surface, and side electrodes are formed on both sides, and a minute gap exists on one side plate surface of this crystal plate for a base. a conductive agent that connects the common electrode of the crystal resonator to the center electrode with the other side plate surface of the crystal resonator facing each other, connects each input/output electrode to each bent electrode, and mechanically holds the base; A support member that holds at least three points of the table crystal plate and leads each electrode to the outside, and a support member that is attached to the tips of at least three terminals implanted in the base. crystal resonator.