JP2021022558A - Hermetic terminal - Google Patents

Hermetic terminal Download PDF

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JP2021022558A
JP2021022558A JP2020106768A JP2020106768A JP2021022558A JP 2021022558 A JP2021022558 A JP 2021022558A JP 2020106768 A JP2020106768 A JP 2020106768A JP 2020106768 A JP2020106768 A JP 2020106768A JP 2021022558 A JP2021022558 A JP 2021022558A
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outer ring
glass
metal outer
copper
airtight terminal
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JP7282059B2 (en
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田中 真
Makoto Tanaka
真 田中
比呂志 加藤
Hiroshi Kato
比呂志 加藤
哲志 森川
Tetsushi Morikawa
哲志 森川
晃 奥野
Akira Okuno
晃 奥野
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Schott AG
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Priority to PCT/JP2020/027313 priority Critical patent/WO2021015049A1/en
Priority to CN202080037165.XA priority patent/CN113853660B/en
Priority to US17/612,031 priority patent/US20220230787A1/en
Priority to DE112020002014.2T priority patent/DE112020002014B4/en
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Abstract

To provide a hermetic terminal that satisfies all of high heat dissipation, large current and high airtightness.SOLUTION: A hermetic terminal comprises: a metal outer ring 12 of a low-resistance conductor comprising copper or a copper alloy having at least one through-hole 11; a lead 13 of a low-resistance conductor comprising copper or a copper alloy inserted through the through-hole 11 of the metal outer ring 12; and an insulating material 14 of high-expansion glass hermetically bonding the metal outer ring 12 and the lead 13 together. The insulating material 14 has diffusion zones 15 of copper ions in the glass in transition regions at interfaces in contact with the metal outer ring 12 and the lead 13. The high-expansion glass that can used herein has a thermal expansion coefficient in the range of 17±6 ppm/K.SELECTED DRAWING: Figure 1

Description

本発明は、金属外環およびリードに銅を用いた気密端子に関する。 The present invention relates to an airtight terminal using copper for the metal outer ring and leads.

気密端子は、金属外環の挿通孔に絶縁材を介してリードを気密に封着したもので、気密容器内に収容された電気機器や素子に電流を供給したり、電気機器や素子から信号を外部に導出したりする場合に用いられる。特に金属外環とリードを絶縁ガラスで封着するGTMS(Glass−to−Metal−Seal)タイプの気密端子は、整合封止型と圧縮封止型の2種類に大別される。前述の気密端子において信頼性の高い気密封止を確保するには、外環およびリードの金属材と絶縁ガラスの熱膨張係数を適正に選択することが重要となる。封止用の絶縁ガラスは、金属外環とリードの素材、要求温度プロファイルおよびその熱膨張係数によって決定されている。整合封止の場合、金属材と絶縁ガラスの熱膨張係数が可能な限り一致するように封止素材を選定する。一方、圧縮封止は、金属外環が絶縁ガラスおよびリードを圧縮するように意図的に異なる熱膨張係数の金属材と絶縁ガラスの材料が選択されている。 An airtight terminal is an airtight terminal in which a lead is airtightly sealed in an insertion hole of a metal outer ring via an insulating material, and a current is supplied to an electric device or element housed in the airtight container, or a signal is sent from the electric device or element. Is used when deriving to the outside. In particular, GTMS (Glass-to-Metal-Seal) type airtight terminals that seal the metal outer ring and leads with insulating glass are roughly classified into two types, a matching sealing type and a compression sealing type. In order to ensure highly reliable airtight sealing in the above-mentioned airtight terminals, it is important to properly select the coefficient of thermal expansion of the metal material of the outer ring and the reed and the insulating glass. The insulating glass for sealing is determined by the material of the metal outer ring and lead, the required temperature profile and its coefficient of thermal expansion. In the case of matched sealing, the sealing material is selected so that the coefficients of thermal expansion of the metal material and the insulating glass match as much as possible. On the other hand, for compression sealing, a metal material and an insulating glass material having intentionally different coefficients of thermal expansion are selected so that the metal outer ring compresses the insulating glass and the reed.

従来の気密端子は高い気密信頼性ならびに電気絶縁性を確保するため、整合封止型気密端子においては、金属外環およびリード材に広い温度範囲でガラス材と熱膨張係数が一致しているコバール合金(Fe54%、Ni28%、Co18%)を使用して、両者をホウケイ酸ガラスからなる絶縁ガラスで封着し、圧縮封止型気密端子においては、使用温度範囲においてガラスに同心円状の圧縮応力が加わるように、炭素鋼またはステンレス鋼などの鋼製の金属外環と、鉄ニッケル合金(Fe50%、Ni50%)や鉄クロム合金(Fe72%、Cr28%)などの鉄合金のリード材を使用して、両者をソーダバリウムガラスからなる絶縁ガラスで封着していた。 In order to ensure high airtightness reliability and electrical insulation of conventional airtight terminals, Kovar has the same thermal expansion coefficient as the glass material over a wide temperature range for the metal outer ring and lead material in the matched sealing type airtight terminal. Using an alloy (Fe 54%, Ni 28%, Co 18%), both are sealed with insulating glass made of borosilicate glass, and in the compression-sealed airtight terminal, the compressive stress concentric with the glass in the operating temperature range. Uses a metal outer ring made of steel such as carbon steel or stainless steel, and a lead material of an iron alloy such as an iron-nickel alloy (Fe50%, Ni50%) or an iron-chromium alloy (Fe72%, Cr28%). Then, both were sealed with insulating glass made of sodabarium glass.

特開昭61−260560号公報Japanese Unexamined Patent Publication No. 61-260560

昨今、特に車の電動化や電車の高速化が進むにつれて、高出力用途のSiC素子を使ったパワーデバイスの開発が活発であるが、これまで高放熱、大電流、高気密の全てに対応したパッケージがなく、その特性を生かせない状況にあった。一方、気密端子の電流容量を大きくするために、銅やアルミニウムなどの低抵抗導体からなる比較的大線径のリードを用いることできれば便利である。しかし、これら低抵抗導体は熱膨張率が大きく、これをより熱膨張率の小さいホウ珪酸ガラスやソーダライムガラスの絶縁ガラスで封止すると、低抵抗導体リードの膨張と収縮に伴い半径方向に引張り応力が生じ、その結果シール界面またはリード軸方向にガラス内部を貫通するクラックが発生しリーク不良となり易いという欠点があった。 In recent years, especially as the electrification of cars and the speeding up of trains have progressed, the development of power devices using SiC elements for high output applications has been active, but so far it has been compatible with all of high heat dissipation, large current, and high airtightness. There was no package, and the situation was such that the characteristics could not be utilized. On the other hand, in order to increase the current capacity of the airtight terminal, it is convenient if a lead having a relatively large wire diameter made of a low resistance conductor such as copper or aluminum can be used. However, these low-resistance conductors have a large coefficient of thermal expansion, and when they are sealed with insulating glass of borosilicate glass or soda lime glass, which has a lower coefficient of thermal expansion, they are pulled in the radial direction as the low-resistance conductor leads expand and contract. There is a drawback that stress is generated, and as a result, cracks penetrating the inside of the glass in the direction of the seal interface or the lead axis are generated, and leak defects are likely to occur.

本発明の目的は、高放熱、大電流、高気密の全てに適合した金属外環およびリードに銅などの低抵抗金属を用いた気密端子を提供することにある。 An object of the present invention is to provide an airtight terminal using a low resistance metal such as copper for a metal outer ring and a lead suitable for all of high heat dissipation, large current, and high airtightness.

本発明によれば、少なくとも1個の貫通孔を有した銅または銅合金からなる低抵抗導体の金属外環と、この金属外環の貫通孔に挿通した銅または銅合金からなる低抵抗導体のリードと、金属外環とリードとを封着する高膨張ガラスの絶縁材を備えたことを特徴とした気密端子が提供される。該絶縁材は、低抵抗導体と前記絶縁材とが接した界面の遷移領域のガラス中に低抵抗導体イオンの拡散帯を有する。上記拡散帯は、銅または銅合金の表面に対して高膨張ガラスの密着性を増し界面強度向上させる。 According to the present invention, a metal outer ring of a low resistance conductor made of copper or a copper alloy having at least one through hole and a low resistance conductor made of copper or a copper alloy inserted through the through hole of the metal outer ring. An airtight terminal is provided characterized in that it comprises a lead and a highly expansive glass insulating material that seals the metal outer ring and the lead. The insulating material has a diffusion zone of low resistance conductor ions in the glass at the transition region of the interface where the low resistance conductor and the insulating material are in contact with each other. The diffusion zone increases the adhesion of the highly expanded glass to the surface of copper or a copper alloy and improves the interfacial strength.

本発明の高膨張ガラスは、熱膨張係数17±6ppm/Kの範囲のものが利用でき銅の熱膨張係数17ppm/Kと整合している。また、銅は鋼材よりも融点が低く、ガラス封着温度が900℃以上の高温で封着すると結晶粒が肥大化し、いわゆる焼鈍状態となって機械的強度が低下してしまう恐れがあり、できる限り低温封着するのが望ましい。 As the high expansion glass of the present invention, a glass having a coefficient of thermal expansion in the range of 17 ± 6 ppm / K can be used and is consistent with the coefficient of thermal expansion of copper of 17 ppm / K. In addition, copper has a lower melting point than steel, and if it is sealed at a high glass sealing temperature of 900 ° C or higher, the crystal grains may become enlarged, resulting in a so-called annealed state and the mechanical strength may decrease. It is desirable to seal at low temperature as much as possible.

本発明に係る気密端子10示し、(a)はその平面図を、(b)は図中のA−A線に沿って切断した正面断面図を示す。The airtight terminal 10 according to the present invention is shown, (a) shows a plan view thereof, and (b) shows a front sectional view cut along the line AA in the drawing. 本発明に係る気密端子の拡散帯を示した断面写真図を示し、(a)は断面写真を、(b)は(a)の断面写真図を説明した図である。A cross-sectional photograph showing a diffusion zone of an airtight terminal according to the present invention is shown, (a) is a cross-sectional photograph, and (b) is a view explaining the cross-sectional photograph of (a).

本発明に係る気密端子10は、図1に示すように、少なくとも1個の貫通孔11を有した銅または銅合金からなる低抵抗導体の金属外環12と、この金属外環12の貫通孔11に挿通した銅または銅合金からなる低抵抗導体のリード13と、金属外環12とリード13とを封着する高膨張ガラスの絶縁材14を備えたことを特徴とする。該絶縁材14は、金属外環12とリード13とに接した界面の遷移領域のガラス中に銅イオンの拡散帯15を有する。上記拡散帯15は、銅または銅合金の表面に対して高膨張ガラスの密着性を増し界面強度向上させる。 As shown in FIG. 1, the airtight terminal 10 according to the present invention has a metal outer ring 12 of a low resistance conductor made of copper or a copper alloy having at least one through hole 11, and a through hole of the metal outer ring 12. It is characterized by comprising a lead 13 of a low resistance conductor made of copper or a copper alloy inserted through 11 and a highly expanding glass insulating material 14 for sealing the metal outer ring 12 and the lead 13. The insulating material 14 has a copper ion diffusion zone 15 in the glass at the transition region of the interface in contact with the metal outer ring 12 and the lead 13. The diffusion zone 15 increases the adhesion of the highly expanded glass to the surface of copper or a copper alloy and improves the interfacial strength.

本発明の高膨張ガラスは、熱膨張係数17±6ppm/Kの範囲のものが利用できる。例えば、リン酸系ガラスが銅の熱膨張係数17ppm/Kと整合し利用できる。また、銅は鉄または鋼材よりも比較的融点が低く、ガラス封着温度が900℃以上の高温で封着すると結晶粒が肥大化し、いわゆる焼鈍状態となって機械的強度が低下してしまう恐れがあり、できる限り低温封着するのが望ましい。 As the high expansion glass of the present invention, a glass having a coefficient of thermal expansion in the range of 17 ± 6 ppm / K can be used. For example, phosphoric acid-based glass can be used in harmony with the thermal expansion coefficient of copper of 17 ppm / K. In addition, copper has a relatively lower melting point than iron or steel, and if it is sealed at a high glass sealing temperature of 900 ° C or higher, the crystal grains may enlarge, resulting in a so-called annealed state and a decrease in mechanical strength. It is desirable to seal at a low temperature as much as possible.

本発明に係る実施例1の気密端子は、3個の貫通孔を有した銅の金属外環と、この金属外環の貫通孔に挿通した銅のリードと、金属外環とリードとをリン酸系ガラスからなる熱膨張係数15.9ppm/Kの高膨張ガラスの絶縁材とを備えたことを特徴とした整合封止型気密端子が提供される。該絶縁材は、金属外環とリードとに接した界面の遷移領域のガラス中に銅イオンの拡散帯を有する。この拡散帯は、図2の封着断面20に示すように、拡散帯25は、ガラス材からなる絶縁材24中において銅リード23と絶縁材24との界面領域に形成されており、薄いピンク色から赤色ないし深赤色(ルビー色)の着色を呈した第一銅イオン由来の拡散物から構成される。銅の金属外環に銅のリードをガラス材で封着する場合、前記拡散帯25が形成されると界面の機械的強度が向上でき、十分な密着と濡れが得られ気密性の確保が可能となる。 The airtight terminal of Example 1 according to the present invention has a copper metal outer ring having three through holes, a copper lead inserted through the through hole of the metal outer ring, and a metal outer ring and a lead. Provided is a matching sealed airtight terminal characterized by being provided with an insulating material of a highly expanding glass having a coefficient of thermal expansion of 15.9 ppm / K made of an acid-based glass. The insulating material has a diffusion zone of copper ions in the glass at the transition region of the interface in contact with the metal outer ring and the lead. As shown in the sealing cross section 20 of FIG. 2, the diffusion band 25 is formed in the interface region between the copper lead 23 and the insulating material 24 in the insulating material 24 made of a glass material, and is light pink. It is composed of a diffuser derived from cuprous ions, which is colored red to deep red (ruby color). When a copper lead is sealed to a copper metal outer ring with a glass material, the mechanical strength of the interface can be improved when the diffusion zone 25 is formed, and sufficient adhesion and wetting can be obtained to ensure airtightness. It becomes.

本発明に係る実施例1は、封着後さらに金属外環およびリードの露出表面にニッケル、ニッケル燐、ニッケルボロン、金めっきなど所望の仕上げめっきを施したものも利用できる。実施例に記載の絶縁材は、銅の熱膨張係数17ppm/Kと整合した高膨張ガラス材であればよく、リン酸系ガラスに替えて他の任意のガラス材を用いてもよい。 In Example 1 according to the present invention, the metal outer ring and the exposed surface of the reed are further subjected to desired finish plating such as nickel, nickel phosphorus, nickel boron, and gold plating after sealing. The insulating material described in the examples may be a high-expansion glass material consistent with a thermal expansion coefficient of copper of 17 ppm / K, and any other glass material may be used instead of the phosphoric acid-based glass.

本発明は、特に高電圧・高電流に耐久し、かつ高い気密性が要求される気密端子に利用できる。 INDUSTRIAL APPLICABILITY The present invention can be applied to an airtight terminal that is particularly durable against high voltage and high current and requires high airtightness.

気密端子10、貫通孔11、金属外環12、リード13、絶縁材14、拡散帯15、気密端子リードの封着断面20、リード23、絶縁材24、拡散帯25。
Airtight terminal 10, through hole 11, metal outer ring 12, lead 13, insulating material 14, diffusion band 15, sealing cross section 20 of airtight terminal lead, lead 23, insulating material 24, diffusion band 25.

本発明の高膨張ガラスは、熱膨張係数17±6ppm/Kの範囲のものが利用できる。例えば、以下の材料および温度条件のみに限定されないが、リン酸系ガラスが銅の熱膨張係数17ppm/Kと整合し利用できる銅は鉄または鋼材よりも比較的融点が低く、ガラス封着温度が900℃以上の高温で封着すると結晶粒が肥大化し、いわゆる焼鈍状態となって機械的強度が低下してしまう恐れがあり、できる限り低温封着するのが望ましい。 As the high expansion glass of the present invention, a glass having a coefficient of thermal expansion in the range of 17 ± 6 ppm / K can be used. For example, but not limited to the following materials and temperature conditions, it can be phosphate glasses are matched to the thermal expansion coefficient of 17 ppm / K of the copper used. Copper has a relatively lower melting point than iron or steel, and if it is sealed at a high glass sealing temperature of 900 ° C or higher, the crystal grains may enlarge, resulting in a so-called annealed state and a decrease in mechanical strength. It is desirable to seal at a low temperature as much as possible.

本発明に係る実施例1の気密端子は、3個の貫通孔を有した銅の金属外環と、この金属外環の貫通孔に挿通した銅のリードと、金属外環とリードとをリン酸系ガラスからなる熱膨張係数15.9ppm/Kの高膨張ガラスの絶縁材とを備えたことを特徴とした整合封止型気密端子が提供される。前記絶縁材は、金属外環とリードを600℃で封着したものであって、該絶縁材は、金属外環とリードとに接した界面の遷移領域のガラス中に銅イオンの拡散帯を有する。この拡散帯は、図2の封着断面20に示すように、拡散帯25は、ガラス材からなる絶縁材24中において銅リード23と絶縁材24との界面領域に形成されており、薄いピンク色から赤色ないし深赤色(ルビー色)の着色を呈した第一銅イオン由来の拡散物から構成される。銅の金属外環に銅のリードをガラス材で封着する場合、前記拡散帯25が形成されると界面の機械的強度が向上でき、十分な密着と濡れが得られ気密性の確保が可能となる。 The airtight terminal of Example 1 according to the present invention has a copper metal outer ring having three through holes, a copper lead inserted through the through hole of the metal outer ring, and a metal outer ring and a lead. Provided is a matching sealed airtight terminal characterized by being provided with an insulating material of a highly expanding glass having a coefficient of thermal expansion of 15.9 ppm / K made of an acid-based glass. The insulating material has a metal outer ring and a lead sealed at 600 ° C., and the insulating material has a diffusion zone of copper ions in the glass at the transition region of the interface between the metal outer ring and the lead. Have. As shown in the sealing cross section 20 of FIG. 2, the diffusion band 25 is formed in the interface region between the copper lead 23 and the insulating material 24 in the insulating material 24 made of a glass material, and is light pink. It is composed of a diffuser derived from cuprous ions, which is colored red to deep red (ruby color). When a copper lead is sealed to a copper metal outer ring with a glass material, the mechanical strength of the interface can be improved when the diffusion zone 25 is formed, and sufficient adhesion and wetting can be obtained to ensure airtightness. It becomes.

Claims (8)

少なくとも1個の貫通孔を有した銅または銅合金の金属外環と、この金属外環の前記貫通孔に挿通した低抵抗導体のリードと、前記金属外環と前記リードとを封着する高膨張ガラスの絶縁材を備え、
前記絶縁材は、前記金属外環と前記リードとに接した界面の遷移領域のガラス中に銅イオンの拡散帯を有する気密端子。
A height for sealing a metal outer ring of copper or a copper alloy having at least one through hole, a lead of a low resistance conductor inserted through the through hole of the metal outer ring, and the metal outer ring and the lead. Equipped with expansion glass insulation,
The insulating material is an airtight terminal having a diffusion band of copper ions in the glass at the transition region of the interface between the metal outer ring and the reed.
前記拡散帯は、薄いピンク色ないし深赤色を呈する請求項1に記載の気密端子。 The airtight terminal according to claim 1, wherein the diffusion band exhibits a light pink color or a deep red color. 前記拡散帯は、第一銅イオン由来の拡散物からなる請求項1または請求項2に記載の気密端子。 The airtight terminal according to claim 1 or 2, wherein the diffusion band is made of a diffused substance derived from cuprous ions. 前記絶縁材は、熱膨張係数が17±6ppm/Kの範囲のものを用いた請求項1ないし請求項3の何れか1つに記載の気密端子。 The airtight terminal according to any one of claims 1 to 3, wherein the insulating material has a coefficient of thermal expansion in the range of 17 ± 6 ppm / K. 前記絶縁材は、リン酸系ガラスからなる請求項1ないし請求項4の何れか1つに記載の気密端子。 The airtight terminal according to any one of claims 1 to 4, wherein the insulating material is made of phosphoric acid-based glass. 前記絶縁材は、封着温度が900℃未満で封着可能なガラス材である請求項5に記載の気密端子。 The airtight terminal according to claim 5, wherein the insulating material is a glass material that can be sealed at a sealing temperature of less than 900 ° C. 前記金属外環および前記リードの露出表面にめっきを施した請求項1ないし請求項6の何れか1つに記載の気密端子。 The airtight terminal according to any one of claims 1 to 6, wherein the exposed surfaces of the metal outer ring and the reed are plated. 前記めっきは、ニッケル、ニッケル燐、ニッケルボロン、金めっきの少なくとも何れか1つからなる請求項7に記載の気密端子。
The airtight terminal according to claim 7, wherein the plating comprises at least one of nickel, nickel phosphorus, nickel boron, and gold plating.
JP2020106768A 2019-07-24 2020-06-22 airtight terminal Active JP7282059B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2020/027313 WO2021015049A1 (en) 2019-07-24 2020-07-14 Hermetic terminal
CN202080037165.XA CN113853660B (en) 2019-07-24 2020-07-14 Airtight terminal
US17/612,031 US20220230787A1 (en) 2019-07-24 2020-07-14 Hermetic Terminal
DE112020002014.2T DE112020002014B4 (en) 2019-07-24 2020-07-14 Hermetic connection

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JPS5293993A (en) * 1976-01-29 1977-08-08 Endress Hauser Gmbh Co Insulating and leadinggin method of leaddin wire
JPS5741791B2 (en) * 1978-07-28 1982-09-04
US4493378A (en) * 1981-07-16 1985-01-15 Kyle James C Terminal assembly
JPS6220267A (en) * 1985-07-18 1987-01-28 三菱電機株式会社 Airtight insulated terminal
JPS6240182A (en) * 1985-08-16 1987-02-21 三菱電機株式会社 Airtight insulation terminal
JP2017084954A (en) * 2015-10-28 2017-05-18 エヌイーシー ショット コンポーネンツ株式会社 Airtight terminal
JP2017112082A (en) * 2015-12-15 2017-06-22 エヌイーシー ショット コンポーネンツ株式会社 Airtight terminal
JP2018181721A (en) * 2017-04-19 2018-11-15 ショット日本株式会社 Airtight terminal

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JPS5293993A (en) * 1976-01-29 1977-08-08 Endress Hauser Gmbh Co Insulating and leadinggin method of leaddin wire
JPS5741791B2 (en) * 1978-07-28 1982-09-04
US4493378A (en) * 1981-07-16 1985-01-15 Kyle James C Terminal assembly
JPS6220267A (en) * 1985-07-18 1987-01-28 三菱電機株式会社 Airtight insulated terminal
JPS6240182A (en) * 1985-08-16 1987-02-21 三菱電機株式会社 Airtight insulation terminal
JP2017084954A (en) * 2015-10-28 2017-05-18 エヌイーシー ショット コンポーネンツ株式会社 Airtight terminal
JP2017112082A (en) * 2015-12-15 2017-06-22 エヌイーシー ショット コンポーネンツ株式会社 Airtight terminal
JP2018181721A (en) * 2017-04-19 2018-11-15 ショット日本株式会社 Airtight terminal

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池田 豊: "「ガラスと金属の封着の機構」", 窯業協會誌, vol. 72巻, 818号, JPN6022051609, 1 February 1964 (1964-02-01), JP, pages 51 - 59, ISSN: 0004935601 *

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