JP4411095B2 - Press-fit cylinder type crystal unit - Google Patents

Press-fit cylinder type crystal unit Download PDF

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JP4411095B2
JP4411095B2 JP2004026373A JP2004026373A JP4411095B2 JP 4411095 B2 JP4411095 B2 JP 4411095B2 JP 2004026373 A JP2004026373 A JP 2004026373A JP 2004026373 A JP2004026373 A JP 2004026373A JP 4411095 B2 JP4411095 B2 JP 4411095B2
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press
cylinder type
type crystal
terminal
solder
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JP2005223378A (en
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剛志 中村
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Citizen Finetech Miyota Co Ltd
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Description

本発明は圧入型シリンダータイプ水晶振動子に関するものである。   The present invention relates to a press-fit cylinder type crystal resonator.

図4は圧入型シリンダータイプ水晶振動子の分解斜視図である。1は封止管、2は気密端子、3はリード端子、4は水晶片、5は水晶片に形成された電極膜である。図4に示す圧入型シリンダータイプ水晶振動子は、水晶片4が気密端子2に埋設されたリード端子3のインナーリード3aに半田若しくは導電性接着剤により固定されている。その後、周波数調整工程、洗浄工程を経、封止管1を前記水晶片4が固定された気密端子2に圧入封止して完成されるシリンダータイプの水晶振動子である。   FIG. 4 is an exploded perspective view of a press-fit cylinder type crystal resonator. 1 is a sealing tube, 2 is an airtight terminal, 3 is a lead terminal, 4 is a crystal piece, and 5 is an electrode film formed on the crystal piece. In the press-fit cylinder type crystal resonator shown in FIG. 4, the crystal piece 4 is fixed to the inner lead 3 a of the lead terminal 3 embedded in the airtight terminal 2 by solder or conductive adhesive. After that, the cylinder-type crystal resonator is completed by press-fitting and sealing the sealing tube 1 into the airtight terminal 2 to which the crystal piece 4 is fixed, through a frequency adjustment process and a cleaning process.

図5は気密端子2の断面図であり、6は金属環(ヘッダー部)、7は絶縁部材、3はリード端子、6aはメッキ部である。気密端子2の金属環6には封止管1の圧入時に軟質金属を介在させて気密性を保つためにメッキ部6aが施されている。従来はSMD用途のために耐熱性が十分に得られる高温半田メッキ(Pbメッキ Pb対残部が9対1)が用いられてきたが、高温半田メッキ(Pbメッキ)には地球環境保護問題があり、現在、電子部品や電子部品の取り付けに使用する半田の鉛フリー化が進められている。気密端子に施すメッキとして錫−銅の合金メッキを施し鉛フリー化を実現したものがある。(特許文献1参照。)   FIG. 5 is a cross-sectional view of the hermetic terminal 2, wherein 6 is a metal ring (header portion), 7 is an insulating member, 3 is a lead terminal, and 6a is a plated portion. The metal ring 6 of the hermetic terminal 2 is provided with a plating portion 6a in order to maintain airtightness by interposing a soft metal when the sealing tube 1 is press-fitted. Conventionally, high-temperature solder plating (Pb plating Pb vs. remaining 9 to 1) has been used to provide sufficient heat resistance for SMD applications, but high-temperature solder plating (Pb plating) has a problem of protecting the global environment. Currently, lead-free solder for electronic components and solder used for mounting electronic components is being promoted. As a plating applied to the hermetic terminal, there is a plating which has been made lead-free by applying a tin-copper alloy plating. (See Patent Document 1.)

図5に示す気密端子は、金属環6及びリード端子3の表面に錫−銅の合金メッキ6aが施されている。また、図示しないが下地として銅又はニッケルをメッキしその上に錫−銅の合金メッキを施す場合もある。直接錫−銅の合金メッキ6aを施す場合は、溶融温度が220℃以上好ましくは240℃以上の錫(90〜97%)−銅(10〜3%)合金を5〜30μmの厚みでメッキする。下地として銅又はニッケルメッキをする場合は、下地層として1〜5μmの銅又はニッケルメッキをした後、溶融温度が220℃以上好ましくは240℃以上の錫(90〜97%)−銅(10〜3%)合金を5〜20μmの厚みでメッキする。圧入する封止管(不図示)は、封止管の材料そのものか、ニッケルメッキを施した構成である。前記構成により高温半田付けに耐えられなおかつ気密性を確保できる圧入型シリンダータイプ水晶振動子を得ている。   The airtight terminal shown in FIG. 5 has a tin-copper alloy plating 6 a on the surface of the metal ring 6 and the lead terminal 3. Although not shown, copper or nickel may be plated as a base and tin-copper alloy plating may be applied thereon. When the direct tin-copper alloy plating 6a is applied, a tin (90 to 97%)-copper (10 to 3%) alloy having a melting temperature of 220 ° C. or higher, preferably 240 ° C. or higher is plated with a thickness of 5 to 30 μm. . In the case of plating copper or nickel as the underlayer, after plating with 1 to 5 μm of copper or nickel as the underlayer, tin (90 to 97%)-copper (10 to 100 ° C. or higher, preferably 240 ° C. or higher, preferably 240 ° C. or higher) 3%) The alloy is plated with a thickness of 5-20 μm. A sealing tube (not shown) to be press-fitted is a material of the sealing tube itself or a structure plated with nickel. With the above configuration, a press-fit cylinder type crystal resonator that can withstand high-temperature soldering and can ensure airtightness is obtained.

特開2001−285007号公報JP 2001-285007 A

前記圧入型シリンダータイプ水晶振動子の組み立てにおいては、洗浄工程が必須となる。
この洗浄工程では、塩素系の洗浄液(例えば、トリクロロエタンやメチレンクロライド)が用いられている。
In the assembly of the press-fit cylinder type crystal resonator, a cleaning process is essential.
In this cleaning step, a chlorine-based cleaning liquid (for example, trichloroethane or methylene chloride) is used.

前記水晶片4を気密端子2に半田で固定する場合は、固定後、半田溶融により発生する半田ボール除去を目的に塩素系洗浄液を用いた洗浄が行われる。また、前記封止管1単体の洗浄にも塩素系洗浄液が用いられ洗浄が行われている。前記洗浄工程を経て、気密端子2と封止管1の圧入封止が行われると、前記封止管1内部に塩素化合物を残してしまう。前記封止管1内に存在する塩素化合物は、気密端子2に施されたメッキ成分の錫と化学反応(正反応)を起こし、塩化錫ガスが生成される。該塩化錫ガスは熱処理工程で一定の温度で加熱されると逆反応を起こし塩化錫が解離して、錫となり水晶片に付着してしまう。これにより周波数を低下させてしまうという問題があった。   When the crystal piece 4 is fixed to the hermetic terminal 2 with solder, cleaning is performed using a chlorine-based cleaning solution for the purpose of removing solder balls generated by solder melting after fixing. Further, the cleaning of the sealing tube 1 alone is performed using a chlorine-based cleaning liquid. When the airtight terminal 2 and the sealing tube 1 are press-fitted and sealed through the cleaning step, a chlorine compound is left inside the sealing tube 1. The chlorine compound present in the sealing tube 1 causes a chemical reaction (positive reaction) with the plating component tin applied to the hermetic terminal 2 to produce tin chloride gas. When the tin chloride gas is heated at a certain temperature in the heat treatment step, a reverse reaction occurs and the tin chloride is dissociated to become tin and adhere to the crystal piece. As a result, there is a problem that the frequency is lowered.

塩化錫ガス発生による不具合は、周波数の低下のみであることから、最終的な周波数のねらい値を塩化錫ガス発生による周波数低下分まで見越した上で、周波数調整工程の条件を定め、熱処理工程において、塩化錫ガスを全て発生させてしまえば良いが、この方法では140℃で60時間以上の熱処理を行わなければならず、量産性の悪化を招くものとなってしまう。   Since the problem due to the generation of tin chloride gas is only a decrease in frequency, the final frequency target value is anticipated up to the frequency decrease due to the generation of tin chloride gas, the conditions for the frequency adjustment process are determined, and the heat treatment process All of the tin chloride gas may be generated, but in this method, heat treatment must be performed at 140 ° C. for 60 hours or more, resulting in deterioration of mass productivity.

また、気密端子に施された合金メッキに含まれる有機系添加剤が熱処理工程においてガス化し、封止管内に放出する。この時、合金メッキの一部を同時に飛散させてしまうことがあり、飛散した合金メッキの一部が水晶片に付着してしまい、これにより周波数を低下させてしまうという問題もあった。   In addition, the organic additive contained in the alloy plating applied to the hermetic terminal is gasified in the heat treatment step and released into the sealed tube. At this time, a part of the alloy plating may be scattered at the same time, and a part of the scattered alloy plating may adhere to the crystal piece, thereby reducing the frequency.

また、前記水晶片4を気密端子2に半田で固定する場合、前述の洗浄工程を経ても、気密端子2上に残ってしまう半田ボールがある。該半田ボールが水晶振動子完成後に封止管内で飛散し、特性を悪化させてしまうという問題もあった。   When the crystal piece 4 is fixed to the hermetic terminal 2 with solder, there are solder balls that remain on the hermetic terminal 2 even after the above-described cleaning process. There is also a problem that the solder balls are scattered in the sealing tube after the crystal resonator is completed, and the characteristics are deteriorated.

本発明の目的は、塩化錫ガスの発生を無くし、さらに封止管内に残ってしまった半田ボールの飛散を防止し、特性を悪化させない圧入型シリンダータイプ水晶振動子を提供しようとするものである。   An object of the present invention is to provide a press-fit cylinder type crystal resonator that eliminates the generation of tin chloride gas, prevents the solder balls remaining in the sealing tube from scattering, and does not deteriorate the characteristics. .

端部に接続用電極膜を形成した水晶片を、金属環と絶縁部材とリード端子で構成された気密端子の2本のインナーリードに配置し、インナーリードと接続用電極膜をそれぞれ接着固定してなる圧入型シリンダータイプ水晶振動子において、少なくとも、前記インナーリードと前記接続電極膜とを半田を用いて接続した接続部と、前記気密端子の金属環上面部とに、非導電性のコーティング部材を塗布した圧入型シリンダータイプ水晶振動子とする。 A crystal piece with a connection electrode film formed on the end is placed on two inner leads consisting of a metal ring, an insulating member, and a lead terminal, and the inner lead and the connection electrode film are bonded and fixed to each other. In the press-fit cylinder type crystal resonator, a non-conductive coating member is formed on at least a connection portion in which the inner lead and the connection electrode film are connected using solder, and a metal ring upper surface portion of the hermetic terminal. A press-fitted cylinder type crystal resonator coated with.

前記コーティング部材を前記気密端子のインナーリードを含む上部全面に塗布した圧入型シリンダータイプ水晶振動子とする。   A press-fitting cylinder type crystal resonator in which the coating member is applied to the entire upper surface including the inner lead of the hermetic terminal.

前記インナーリードと前記接続用電極膜の接続部と、前記気密端子の金属環上面部にコーティング部材を塗布したので、封止管内で露出するメッキ部を覆うことができ、メッキ部に含まれる錫が封止管内に放出せず、洗浄時に残る塩素と化学反応を起こすことがなくなる。よって、圧入型シリンダータイプ水晶振動子の周波数特性を低下させることがなくなった。また、合金メッキに含まれる有機系添加剤のガス化による封止管内への放出と、この放出に伴う合金メッキの一部の飛散も防止できる。   Since the coating member is applied to the connection part of the inner lead and the connection electrode film and the metal ring upper surface part of the hermetic terminal, the plating part exposed in the sealing tube can be covered, and the tin contained in the plating part Will not be released into the sealed tube and will not cause a chemical reaction with chlorine remaining during cleaning. As a result, the frequency characteristics of the press-fit cylinder type crystal resonator are not deteriorated. Further, it is possible to prevent the organic additive contained in the alloy plating from being released into the sealing tube by gasification and part of the alloy plating accompanying the release.

コーティング部材を前記気密端子のインナーリードを含む上部全面に塗布したので、水晶片マウントの補強材としても機能させることができる。また、水晶片の半田マウントの場合、洗浄で落としきれずに残った気密端子上の半田ボールもコーティングされてしまうので、完成後半田ボールが封止管内で飛散することも無くなる。   Since the coating member is applied to the entire upper surface including the inner lead of the hermetic terminal, it can function as a reinforcing member for the crystal piece mount. In addition, in the case of a crystal piece solder mount, the solder balls on the airtight terminals that cannot be removed by washing are also coated, so that the solder balls are not scattered in the sealing tube after completion.

インナーリードと、水晶片の接続用電極膜との接続部と、気密端子の金属環上面部にコーティング部材を塗布して圧入型シリンダータイプ水晶振動子を構成する。   A press-fitting cylinder type crystal resonator is configured by applying a coating member to the connection portion between the inner lead and the connection electrode film of the crystal piece and the upper surface of the metal ring of the airtight terminal.

以下、図に基づいて本発明の具体的な実施形態について説明する。
図1は本発明の第一実施例の圧入型シリンダータイプ水晶振動子を示す図で、(A)は斜視図、(B)は上面図である。図4に示す圧入型シリンダータイプ水晶振動子と同一部材については同一の符号を用いて説明する。尚、図1において封止管は省略してある。
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
1A and 1B are views showing a press-fit cylinder type crystal resonator according to a first embodiment of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a top view. The same members as those in the press-fit cylinder type crystal resonator shown in FIG. 4 will be described using the same reference numerals. In FIG. 1, the sealing tube is omitted.

気密端子2は金属管6、絶縁部材7、リード端子3で構成されており、金属管6とリード端子3の表面には背景技術において説明した錫−銅の合金メッキ(不図示)が施されている。さらに、該気密端子2の金属管6の上面部、及びインナーリード3aにはコーティング部材8を塗布している。コーティング部材8の塗布は、図示しない封止管を気密端子2に圧入封止したときに封止管内で前記錫−銅の合金メッキ部が露出してしまう部分に対して行われる。コーティング部材8の塗布後、電極膜5の形成された水晶片4を気密端子2のインナーリード3aと水晶片4の接続用電極5aを対応させて配置し、接着材9により固定している。インナーリード3aと接続用電極5aは機械的な接続と同時に電気的な接続も行うので、コーティング部材8は導電性の部材である。また、コーティング部材8として導電性接着剤を用いれば、マウント時に用いる接着剤9を省略することが可能である。水晶片4の気密端子2へのマウント後は、従来通りの洗浄工程を経、封止管(不図示)が圧入封止されて圧入型シリンダータイプ水晶振動子が構成される。   The hermetic terminal 2 is composed of a metal tube 6, an insulating member 7, and a lead terminal 3. The surface of the metal tube 6 and the lead terminal 3 is subjected to the tin-copper alloy plating (not shown) described in the background art. ing. Further, a coating member 8 is applied to the upper surface portion of the metal tube 6 of the hermetic terminal 2 and the inner lead 3a. The coating member 8 is applied to a portion where the tin-copper alloy plating portion is exposed in the sealing tube when a sealing tube (not shown) is press-fitted and sealed into the hermetic terminal 2. After application of the coating member 8, the crystal piece 4 on which the electrode film 5 is formed is disposed in correspondence with the inner lead 3 a of the airtight terminal 2 and the connection electrode 5 a of the crystal piece 4, and is fixed by the adhesive 9. Since the inner lead 3a and the connection electrode 5a are electrically connected simultaneously with the mechanical connection, the coating member 8 is a conductive member. Further, if a conductive adhesive is used as the coating member 8, the adhesive 9 used at the time of mounting can be omitted. After the crystal piece 4 is mounted on the hermetic terminal 2, a conventional cleaning process is performed, and a sealing tube (not shown) is press-fitted and sealed to form a press-fitting cylinder type crystal resonator.

図2は本発明の圧入型シリンダータイプ水晶振動子で封止管圧入部の拡大図である。金属環6の上面部(封止管1が気密端子2に圧入封止された際に封止管内に露出する部分)にはコーティング部材8が塗布されているので、封止管内部で露出する錫−銅の合金メッキ部を完全に被覆している。   FIG. 2 is an enlarged view of a sealing tube press-fitting portion in the press-fitting cylinder type crystal resonator of the present invention. Since the coating member 8 is applied to the upper surface portion of the metal ring 6 (the portion exposed to the sealing tube when the sealing tube 1 is press-fitted and sealed to the airtight terminal 2), the coating member 8 is exposed inside the sealing tube. The alloy plating part of tin-copper is completely covered.

前記構成によれば、完成後の圧入型シリンダータイプ水晶振動子において、封止管内で、気密端子2に施された錫−銅の合金メッキ部がコーティング部材8により覆われて露出しないので、塩素系洗浄液を用いた洗浄工程、熱処理工程を経ても前述の化学反応を起こす心配が無く、錫の水晶片への付着が防止でき、周波数の低下という問題を解消できる。   According to the above configuration, in the press-fitted cylinder type crystal resonator after completion, the tin-copper alloy plating portion applied to the airtight terminal 2 is covered with the coating member 8 and not exposed in the sealing tube. There is no fear of causing the above-described chemical reaction even after a cleaning process and a heat treatment process using a system cleaning solution, and adhesion of tin to a quartz crystal piece can be prevented, and the problem of a decrease in frequency can be solved.

図3は本発明の第二実施例の圧入型シリンダータイプ水晶振動子を示す図で、(A)は斜視図、(B)は上面図である。第一実施例同様封止管は省略してある。   3A and 3B are views showing a press-fit cylinder type crystal resonator according to a second embodiment of the present invention. FIG. 3A is a perspective view and FIG. 3B is a top view. The sealing tube is omitted as in the first embodiment.

第二実施例においては、水晶片4の気密端子2へのマウントには半田10が用いられ、該半田を溶融することにより固定される。この場合、コーティング部材11は気密端子2の上部全面(インナーリード3a及び半田10を含む)に塗布した構成である。コーティング部材11は接続電極5aとインナーリード3aとの電気的な接続を考慮し非導電性接着剤とする。   In the second embodiment, the solder 10 is used for mounting the crystal piece 4 to the hermetic terminal 2 and is fixed by melting the solder. In this case, the coating member 11 is applied to the entire upper surface of the hermetic terminal 2 (including the inner lead 3a and the solder 10). The coating member 11 is a non-conductive adhesive in consideration of the electrical connection between the connection electrode 5a and the inner lead 3a.

前記構成によれば、完成後の圧入型シリンダータイプ水晶振動子において、封止管内で、気密端子2に施された錫−銅の合金メッキ部がコーティング部材11により覆われて露出せず、さらに半田10もコーティング部材11で覆われて露出しないので、塩素系洗浄液を用いた洗浄工程、熱処理工程を経ても錫の水晶片への付着が防止でき、周波数の低下という問題を解消できる。また、半田10の溶融の際に発生した半田ボールが、気密端子2上に残っていたとしてもコーティング部材11で覆ってしまうので、封止管内での飛散を防止でき、特性に悪影響を与えることがない。   According to the above configuration, in the press-fitted cylinder type crystal resonator after completion, the tin-copper alloy plating portion applied to the airtight terminal 2 is covered with the coating member 11 in the sealing tube and is not exposed. Since the solder 10 is also covered with the coating member 11 and is not exposed, it is possible to prevent tin from adhering to the quartz crystal piece even after a cleaning process and a heat treatment process using a chlorine-based cleaning solution, and the problem of a decrease in frequency can be solved. Further, even if the solder ball generated when the solder 10 melts remains on the hermetic terminal 2, it is covered with the coating member 11, so that scattering in the sealing tube can be prevented and the characteristics are adversely affected. There is no.

本発明の圧入型シリンダータイプ水晶振動子を示す図で、(A)は斜視図、(B)は上面図。(実施例1)It is a figure which shows the press injection type cylinder type crystal oscillator of this invention, (A) is a perspective view, (B) is a top view. Example 1 本発明の圧入型シリンダータイプ水晶振動子で封止管圧入部の拡大図。(実施例1)The enlarged view of a sealing pipe press-fit part by the press-fit type cylinder type crystal oscillator of the present invention. Example 1 本発明の圧入型シリンダータイプ水晶振動子を示す図で、(A)は斜視図、(B)は上面図。(実施例2)It is a figure which shows the press injection type cylinder type crystal oscillator of this invention, (A) is a perspective view, (B) is a top view. (Example 2) 圧入型シリンダータイプ水晶振動子の分解斜視図。FIG. 3 is an exploded perspective view of a press-fit cylinder type crystal resonator. 気密端子の断面図。Sectional drawing of an airtight terminal.

符号の説明Explanation of symbols

1 封止管
2 気密端子
3 リード端子
3a インナーリード
4 水晶片
5 電極膜
5a 接続電極
6 金属管
6a メッキ部
7 絶縁部材
8 コーティング部材
9 接着剤
10 半田
11 コーティング部材
DESCRIPTION OF SYMBOLS 1 Sealing tube 2 Airtight terminal 3 Lead terminal 3a Inner lead 4 Crystal piece 5 Electrode film 5a Connection electrode 6 Metal tube 6a Plating part 7 Insulating member 8 Coating member 9 Adhesive 10 Solder 11 Coating member

Claims (2)

端部に接続用電極膜を形成した水晶片を、金属環と絶縁部材とリード端子で構成された気密端子の2本のインナーリードに配置し、
インナーリードと接続用電極膜をそれぞれ接着固定してなる圧入型シリンダータイプ水晶振動子において、
少なくとも、前記インナーリードと前記接続用電極膜とを半田を用いて接続した接続部と、前記気密端子の金属環上面部とに、非導電性のコーティング部材を塗布したことを特徴とする圧入型シリンダータイプ水晶振動子。
A crystal piece having a connection electrode film formed on the end is disposed on two inner leads of an airtight terminal composed of a metal ring, an insulating member, and a lead terminal,
In the press-fit cylinder type crystal unit that is formed by bonding and fixing the inner lead and the electrode film for connection,
A press-fit type in which a non-conductive coating member is applied to at least a connection portion where the inner lead and the connection electrode film are connected using solder, and a metal ring upper surface portion of the hermetic terminal Cylinder type crystal unit.
前記コーティング部材を前記気密端子のインナーリードを含む上部全面に塗布したことを特徴とする請求項1記載の圧入型シリンダータイプ水晶振動子。
2. The press-fit cylinder type crystal resonator according to claim 1, wherein the coating member is applied to an entire upper surface including an inner lead of the hermetic terminal.
JP2004026373A 2004-02-03 2004-02-03 Press-fit cylinder type crystal unit Expired - Lifetime JP4411095B2 (en)

Priority Applications (1)

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JP2004026373A JP4411095B2 (en) 2004-02-03 2004-02-03 Press-fit cylinder type crystal unit

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Application Number Priority Date Filing Date Title
JP2004026373A JP4411095B2 (en) 2004-02-03 2004-02-03 Press-fit cylinder type crystal unit

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JP2005223378A JP2005223378A (en) 2005-08-18
JP4411095B2 true JP4411095B2 (en) 2010-02-10

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JP4817370B2 (en) * 2006-03-24 2011-11-16 エヌイーシー ショット コンポーネンツ株式会社 Package for electronic components

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