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JP3588573B2 - Solder-sealed package temperature monitoring method - Google Patents
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JP3588573B2 - Solder-sealed package temperature monitoring method - Google Patents

Solder-sealed package temperature monitoring method Download PDF

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Publication number
JP3588573B2
JP3588573B2 JP32670499A JP32670499A JP3588573B2 JP 3588573 B2 JP3588573 B2 JP 3588573B2 JP 32670499 A JP32670499 A JP 32670499A JP 32670499 A JP32670499 A JP 32670499A JP 3588573 B2 JP3588573 B2 JP 3588573B2
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JP
Japan
Prior art keywords
temperature
package
sealing
ceramic package
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP32670499A
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Japanese (ja)
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JP2001144199A (en
Inventor
厚 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Avionics Co Ltd
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Nippon Avionics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Avionics Co Ltd filed Critical Nippon Avionics Co Ltd
Priority to JP32670499A priority Critical patent/JP3588573B2/en
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Description

【0001】
【発明の属する技術分野】
本発明はセラミックパッケージのはんだ封止に係り、パッケージ温度監視方法に関するものである。
【0002】
【従来の技術】
従来、セラミックパッケージを気密封止するには、封止方法に合わせてパッケージおよびリッドを準備する。例えば、シーム溶接による封止の場合は、セラミックパッケージの封止部をメタライズしてシールリングをロー付けし、コバール製リッドはニッケルめっきを施す。シーム溶接によらない、はんだ封止の場合はセラミックパッケージの封止部をメタライズし、シールリングを取り付けずに該メタライズ部にニッケルめっき後金めっきを施し、リッドはニッケルめっき後封止面だけはんだの圧接またはめっき処理をする。
以降、はんだ封止に限定して説明する。
はんだ封止の方法として、図2に示すようにパッケージ全体を炉に入れて加熱する方法がある。しかしながら、この方法はパッケージ内の素子等も長時間高温に曝されてしまうため素子等の特性が変化し、製品の性能が満足されなくなってしまう場合があった。
【0003】
そこで、パルスヒートツールを使用して短時間に封止する方法が用いられる。図3に封止に使用するパルスヒートツールの例を示す。図3で、9はヒータ、10はヒータを支持する絶縁台、11はヒータ加熱のためのパルス電流を制御、供給する電源部、12はヒータ部に取り付けた熱電対等の測温手段、13はワークすなわち被封止セラミックパッケージを示す。パルスヒートによる封止は、図では省略している押圧手段によりワーク13を押圧し、測温手段12により予め封止に最適なツール加熱温度と加熱時間を設定した電源部11からヒータ9へパルス電流を供給する。ヒータ9はモリブデン等の高抵抗材を使用し、熱容量が小さくなるように薄片で作られ、通電とともに瞬時に昇温し、通電終了とともに急速に降温する。したがって、このパルスヒートによる封止はパッケージ内の素子等への熱の影響が少ない。
【0004】
【発明が解決しようとする課題】
しかしながら、リッドを含むパッケージの外形仕上がり精度によっては、パッケージとパルスヒートツールとの接触が不均一となり、単純にツール加熱温度と加熱時間の制御だけでは封止品質を管理できない場合が起きる。
本発明は、上記課題を解決するためになされたもので、パルスヒートツールによってパッケージをはんだ封止する場合に、封止品質が保証できるようにするためのパッケージ温度監視方法を提供することを目的とする。
【0005】
【課題を解決するための手段】
請求項1のはんだ封止のパッケージ温度監視方法は、パルスヒートツールのヒータ上に表面を下向きにしたリッドを載置し、該リッド上に底面を上にしたセラミックパッケージ本体を載置し、該セラミックパッケージの底面をノズルで加圧しながら前記ヒータに加熱電流を流すセラミックパッケージのはんだ封止作業において、ノズルの先端に測温手段を取り付け、該測温手段の出力で前記セラミックパッケージの底面の昇温状況を監視することを特徴とする。
【0006】
請求項1のはんだ封止のパッケージ温度監視方法によれば、パッケージの仕上がり精度のバラツキによるヒータからの熱伝導に差があっても、パッケージ底面の昇温状況を監視するので、封止部に必要な封止温度が得られたか否かを確認することができる。
【0007】
請求項2のはんだ封止のパッケージ温度監視方法は、前記測温手段の出力をパルスヒート装置に接続し、予め設定した封止完了温度と前記セラミックパッケージの底面の昇温状況とを自動比較判定し、該装置の電源からの通電時間を制御することを特徴とする。
【0008】
請求項2のはんだ封止のパッケージ温度監視方法によれば、予め実験により得られたパッケージ底部の昇温状況と封止部の昇温状況との関係から、封止部が封止に最適な温度に到達するまで自動で通電時間を調整することができる。
【0009】
【発明の実施の形態】
図1は本発明の1実施形態を示す側面模式図である。図1において、1はパルスヒートツールのヒータ、2はセラミックパッケージ本体、3はリッド、4はセラミックパッケージのメタライズ部分、5はノズル、6は測温手段を示す。測温手段6には熱電対を使用するが、サーミスタ、赤外線素子でも可能である。まず、パルスヒートツールのヒータ1上に表面を下向きにしてリッド3を載置し、該リッド3にセラミックパッケージのメタライズ部分4を重ねるようにセラミックパッケージ本体2を載置する。先端に測温手段6を取り付けたノズル5で前記パッケージ2の底面を加圧(7)しながらリッド3とセラミックパッケージ本体2の位置合わせを行ない、図では省略しているがパルスヒート装置からヒータ1に対し予め設定した加熱電流を流す。この時、ノズル5の先端に取り付けた測温手段6の出力でパッケージ2の底面温度を計測し、予め実験済みの封止に必要な昇温が得られたことを確認する。パッケージの仕上がり精度によっては予め設定した加熱電流で封止に必要な昇温が得られない場合がありうるが、その場合は必要な温度に達するまで通電時間を延長する。
【0010】
また、前記測温手段6の出力をパルスヒート装置の制御部へフィードバックすることで、予め実験により設定した封止完了温度が得られたか否かを自動判定し、封止が完了するまで該装置の電源からの通電時間延長を制御することも可能である。
【0011】
【発明の効果】
本発明によれば、パッケージの仕上がり精度に影響されることなく封止部の加熱状況を監視できるので、封止品質を保証することが容易である。また、封止品質を保証するように通電時間を自動制御することも可能である。
【図面の簡単な説明】
【図1】本発明の1実施形態を示す側面模式図である。
【図2】従来の、パッケージ全体を炉に入れて封止する方法の模式図を示す。
【図3】パルスヒートツールの例を示す。
【符号の説明】
1 パルスヒートツールのヒータ
2 セラミックパッケージ本体
3 リッド
4 セラミックパッケージのメタライズ部分(メタライズ+Ni+Au)
5 ノズル
6 測温手段(熱電対等)
7 加圧
8 炉
9 ヒータ
10 ヒータを支持する絶縁台
11 ヒータ加熱のためのパルス電流を制御、供給する電源部
12 ヒータ部に取り付けた熱電対等の測温手段
13 ワーク(被封止セラミックパッケージ)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to solder sealing of a ceramic package, and relates to a package temperature monitoring method.
[0002]
[Prior art]
Conventionally, in order to hermetically seal a ceramic package, a package and a lid are prepared in accordance with a sealing method. For example, in the case of sealing by seam welding, the sealing portion of the ceramic package is metallized and a seal ring is brazed, and the Kovar lid is nickel-plated. In the case of solder sealing without using seam welding, the sealing part of the ceramic package is metallized, and the metallized part is plated with gold after nickel plating without attaching a seal ring. Apply pressure welding or plating.
Hereinafter, description will be limited to solder sealing.
As a solder sealing method, there is a method of heating the entire package in a furnace as shown in FIG. However, in this method, the elements in the package are exposed to a high temperature for a long time, so that the characteristics of the elements change and the performance of the product may not be satisfied.
[0003]
Therefore, a method of sealing in a short time using a pulse heat tool is used. FIG. 3 shows an example of a pulse heat tool used for sealing. In FIG. 3, 9 is a heater, 10 is an insulating stand for supporting the heater, 11 is a power supply unit for controlling and supplying a pulse current for heating the heater, 12 is a temperature measuring means such as a thermocouple attached to the heater unit, and 13 is A workpiece, that is, a sealed ceramic package is shown. Sealing by pulse heat is performed by applying a pulse from the power source 11 to the heater 9 by pressing the work 13 by pressing means (not shown in the figure) and setting in advance the tool heating temperature and heating time optimal for sealing by the temperature measuring means 12. Supply current. The heater 9 uses a high-resistance material such as molybdenum and is made of a thin piece so as to reduce the heat capacity. The heater 9 instantaneously increases in temperature when energized and rapidly decreases when energization ends. Therefore, sealing by this pulse heat has little influence of heat on the elements in the package.
[0004]
[Problems to be solved by the invention]
However, depending on the accuracy of the outer shape of the package including the lid, the contact between the package and the pulse heat tool becomes non-uniform, and the sealing quality may not be managed simply by controlling the tool heating temperature and heating time.
The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a package temperature monitoring method for ensuring the sealing quality when a package is solder-sealed by a pulse heat tool. And
[0005]
[Means for Solving the Problems]
In the solder sealing package temperature monitoring method according to claim 1, a lid having a surface facing downward is placed on a heater of a pulse heat tool, and a ceramic package body having a bottom surface is placed on the lid. In solder sealing of the ceramic package in which a heating current is applied to the heater while pressing the bottom surface of the ceramic package with a nozzle, a temperature measuring means is attached to the tip of the nozzle, and the bottom of the ceramic package is raised by the output of the temperature measuring means. It is characterized by monitoring temperature conditions.
[0006]
According to the solder sealing package temperature monitoring method of claim 1, even if there is a difference in heat conduction from the heater due to variations in the finishing accuracy of the package, the temperature rise state of the package bottom surface is monitored. It can be confirmed whether a necessary sealing temperature is obtained.
[0007]
The package temperature monitoring method for solder sealing according to claim 2, wherein the output of the temperature measuring means is connected to a pulse heat device, and an automatic comparison determination is made between a preset sealing completion temperature and a temperature rising state of the bottom surface of the ceramic package. And controlling the energization time from the power source of the apparatus.
[0008]
According to the package temperature monitoring method for solder sealing of claim 2, the sealing portion is optimal for sealing from the relationship between the temperature rising state of the package bottom and the temperature rising state of the sealing portion obtained in advance by experiments. The energization time can be automatically adjusted until the temperature is reached.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic side view showing an embodiment of the present invention. In FIG. 1, 1 is a heater of a pulse heat tool, 2 is a ceramic package body, 3 is a lid, 4 is a metallized portion of the ceramic package, 5 is a nozzle, and 6 is a temperature measuring means. A thermocouple is used for the temperature measuring means 6, but a thermistor or an infrared element is also possible. First, the lid 3 is placed on the heater 1 of the pulse heat tool with the surface facing downward, and the ceramic package body 2 is placed on the lid 3 so that the metallized portion 4 of the ceramic package is overlaid. The lid 5 and the ceramic package body 2 are aligned while the bottom surface of the package 2 is pressurized (7) with a nozzle 5 having a temperature measuring means 6 attached to the tip. A preset heating current is applied to 1. At this time, the bottom surface temperature of the package 2 is measured by the output of the temperature measuring means 6 attached to the tip of the nozzle 5, and it is confirmed that a temperature increase necessary for sealing that has been tested in advance has been obtained. Depending on the finishing accuracy of the package, it may not be possible to obtain a temperature increase necessary for sealing with a preset heating current. In this case, the energization time is extended until the required temperature is reached.
[0010]
Further, by feeding back the output of the temperature measuring means 6 to the control unit of the pulse heat device, it is automatically determined whether or not a sealing completion temperature set in advance by an experiment is obtained, and the device until the sealing is completed. It is also possible to control the extension of the energization time from the power source.
[0011]
【The invention's effect】
According to the present invention, since the heating state of the sealing portion can be monitored without being influenced by the finishing accuracy of the package, it is easy to guarantee the sealing quality. It is also possible to automatically control the energization time so as to guarantee the sealing quality.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an embodiment of the present invention.
FIG. 2 is a schematic view of a conventional method for sealing an entire package in a furnace.
FIG. 3 shows an example of a pulse heat tool.
[Explanation of symbols]
1 Heater of pulse heat tool 2 Ceramic package body 3 Lid 4 Metallized part of ceramic package (metalized + Ni + Au)
5 Nozzle 6 Temperature measuring means (thermocouple, etc.)
7 Pressurization 8 Furnace 9 Heater 10 Insulating base 11 for supporting the heater Power supply unit 12 for controlling and supplying the pulse current for heating the heater 13 Temperature measuring means 13 such as a thermocouple attached to the heater unit Workpiece (ceramic package to be sealed)

Claims (2)

パルスヒートツールのヒータ上に表面を下向きにしたリッドを載置し、該リッド上に底面を上にしたセラミックパッケージ本体を載置し、該セラミックパッケージの底面をノズルで加圧しながら前記ヒータに加熱電流を流すセラミックパッケージのはんだ封止作業において、ノズルの先端に測温手段を取り付け、該測温手段の出力で前記セラミックパッケージの底面の昇温状況を監視することを特徴とするはんだ封止のパッケージ温度監視方法。Place a lid with the surface facing down on the heater of the pulse heat tool, place the ceramic package body with the bottom face up on the lid, and heat the heater while pressing the bottom face of the ceramic package with a nozzle In the solder sealing work of the ceramic package through which an electric current flows, a temperature measuring means is attached to the tip of the nozzle, and the temperature rising state of the bottom surface of the ceramic package is monitored by the output of the temperature measuring means. Package temperature monitoring method. 前記測温手段の出力をパルスヒート装置に接続し、予め設定した封止完了温度と前記セラミックパッケージの底面の昇温状況とを自動比較判定し、該装置の電源からの通電時間を制御することを特徴とする請求項1のはんだ封止のパッケージ温度監視方法。Connecting the output of the temperature measuring means to a pulse heat device, automatically comparing and determining a preset sealing completion temperature and the temperature rise state of the bottom surface of the ceramic package, and controlling the energization time from the power source of the device The package temperature monitoring method for solder sealing according to claim 1.
JP32670499A 1999-11-17 1999-11-17 Solder-sealed package temperature monitoring method Expired - Fee Related JP3588573B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32670499A JP3588573B2 (en) 1999-11-17 1999-11-17 Solder-sealed package temperature monitoring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32670499A JP3588573B2 (en) 1999-11-17 1999-11-17 Solder-sealed package temperature monitoring method

Publications (2)

Publication Number Publication Date
JP2001144199A JP2001144199A (en) 2001-05-25
JP3588573B2 true JP3588573B2 (en) 2004-11-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP32670499A Expired - Fee Related JP3588573B2 (en) 1999-11-17 1999-11-17 Solder-sealed package temperature monitoring method

Country Status (1)

Country Link
JP (1) JP3588573B2 (en)

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Publication number Publication date
JP2001144199A (en) 2001-05-25

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