JPH0598377A - Aluminum alloy for magnetron heat radiation bar and its production - Google Patents
Aluminum alloy for magnetron heat radiation bar and its productionInfo
- Publication number
- JPH0598377A JPH0598377A JP28369691A JP28369691A JPH0598377A JP H0598377 A JPH0598377 A JP H0598377A JP 28369691 A JP28369691 A JP 28369691A JP 28369691 A JP28369691 A JP 28369691A JP H0598377 A JPH0598377 A JP H0598377A
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- JP
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- Prior art keywords
- aluminum alloy
- magnetron
- heat resistance
- alloy
- thermal conductivity
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐熱性に優れたマグネト
ロン放熱条用アルミニウム合金およびその製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant aluminum alloy for magnetron heat dissipation strips and a method for producing the same.
【０００２】[0002]
【従来の技術とその課題】電子レンジ等に使用されてい
るマグネトロン放熱条の特性としては、良好な熱伝導性
は勿論、加熱時の放熱条同志の接着防止のため耐熱性が
必要とされる。その他にも耐高温酸化性や、マグネトロ
ンへ取付けの際の圧入による割れ防止のため成形性も必
要とされる。そこで従来マグネトロン放熱条には厚さ
０．６mm程度の１０５０等の純Ａｌが用いられている。
しかし最近電子レンジの高性能化に伴いマグネトロンの
使用温度は従来２４０℃程度であったものが約３００℃
にもなって来ており、さらに耐熱性の向上が要求されて
いる。耐熱性向上の手段としては、１０００系Ａｌの場
合ストリップキャスティング法等を用いて主に不純物で
あるＦｅの固溶量を増し耐熱性を上げるか、または耐熱
性向上に効果のある合金元素を添加する方法が考えられ
る。またコスト低減の面からマグネトロン放熱条の薄肉
化が要求されているが、そのためには強度向上も必要と
なる。しかし上記のストリップキャスティング法を用い
る場合、その設備に莫大な費用を要する他、Ｆｅの固溶
量を増すと熱伝導度が低下する。また合金元素添加によ
り耐熱性と強度の向上を図る場合、熱伝導度が低下する
などの問題があった。2. Description of the Related Art As a characteristic of a magnetron heat radiation strip used in a microwave oven or the like, not only good thermal conductivity but also heat resistance is required to prevent the radiation strips from adhering to each other during heating. .. In addition, high temperature oxidation resistance and formability are also required to prevent cracking due to press fitting when attached to the magnetron. Therefore, in the conventional magnetron heat radiation strip, pure Al having a thickness of about 0.6 mm such as 1050 is used.
However, due to the high performance of microwave ovens, the operating temperature of the magnetron has been about 240 ° C in the past, but about 300 ° C.
It is also becoming more and more necessary to improve heat resistance. As a means for improving heat resistance, in the case of 1000-based Al, a strip casting method or the like is mainly used to increase the solid solution amount of Fe, which is an impurity, to increase heat resistance, or an alloying element effective for improving heat resistance is added. There are possible ways to do it. Further, from the viewpoint of cost reduction, it is required to reduce the thickness of the magnetron heat dissipation strip, but for that purpose, it is also necessary to improve the strength. However, when the above strip casting method is used, the equipment requires enormous cost and the thermal conductivity decreases as the solid solution amount of Fe increases. In addition, when heat resistance and strength are improved by adding alloy elements, there is a problem that thermal conductivity decreases.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記の問題に
ついて検討の結果、合金元素添加により熱伝導度の低下
が小さく、耐熱性および強度の優れたマグネトロン放熱
条用アルミニウム合金およびその製造方法を開発したも
のである。DISCLOSURE OF THE INVENTION As a result of studying the above problems, the present invention provides an aluminum alloy for a magnetron heat dissipation strip which has a small decrease in thermal conductivity due to the addition of alloying elements and is excellent in heat resistance and strength, and a method for producing the same. It was developed.
【０００４】[0004]
【課題を解決するための手段】本発明は、Ｓｉ０．０３
〜０．６wt％、Ｆｅ０．０３〜０．８wt％、Ｃｕ０．０
０３〜０．３wt％およびＺｒ０．０２〜０．２５wt％を
含み残部Ａｌからなるマグネトロン放熱条用アルミニウ
ム合金であり、またＳｉ０．０３〜０．６wt％、Ｆｅ
０．０３〜０．８wt％、Ｃｕ０．００３〜０．３wt％お
よびＺｒ０．０２〜０．２５wt％を含み残部Ａｌからな
る合金を４００〜５８０℃の温度で均質化処理すること
を特徴とするマグネトロン放熱条用アルミニウム合金の
製造方法である。すなわち本発明はＡｌにＳｉ、Ｆｅ、
ＣｕおよびＺｒの所定量を添加することにより熱伝導度
を低下させることなく強度および耐熱性を著しく改善せ
しめたものであり、またこの合金を所定の温度範囲で均
質化処理を行うことによりＡｌ3 Ｚｒの化合物を合金に
微細で密に析出せしめて耐熱性を向上させたものであ
る。The present invention provides Si0.03
~ 0.6wt%, Fe0.03-0.8wt%, Cu0.0
It is an aluminum alloy for a magnetron heat dissipation strip containing 03 to 0.3 wt% and Zr 0.02 to 0.25 wt% and the balance Al, and Si 0.03 to 0.6 wt% and Fe.
An alloy containing 0.03 to 0.8 wt%, Cu 0.003 to 0.3 wt% and Zr 0.02 to 0.25 wt% and the balance Al is homogenized at a temperature of 400 to 580 ° C. It is a method for producing an aluminum alloy for a magnetron heat dissipation strip. That is, in the present invention, Al, Si, Fe,
By adding a predetermined amount of Cu and Zr, the strength and heat resistance are remarkably improved without lowering the thermal conductivity, and Al 3 is obtained by subjecting this alloy to a homogenizing treatment within a predetermined temperature range. The heat resistance is improved by finely and densely depositing a Zr compound in the alloy.
【０００５】[0005]
【作用】以下に本発明の各元素の作用および添加量の限
定理由について説明する。先ずＳｉは合金の強度を向上
し、Ｆｅの晶出や析出を容易にしＦｅと共にＡｌ−Ｆｅ
−Ｓｉ系の化合物を作る。一般にＡｌ中の異種元素は化
合物状態の方が固溶状態より熱伝導度の低下が小さい。
Ｓｉが０．０３wt％未満ではこれらの効果が十分でな
く、０．６wt％を超えると粗大な化合物となり成形性を
劣化させマグネトロンへの圧入の際のクラックが生じ易
くなる。Ｆｅは合金の強度を上げると共に金属組織を微
細にし成形性を向上させる。Ｆｅ量が増えるとＦｅを含
む化合物が増え、この化合物が再核発生位置となるた
め、再結晶核発生数が増え、金属組織が微細になる。マ
グネトロン放熱条用アルミニウム合金の場合、圧入によ
ってマグネトロンへ取付けるため、成形性が低いと放熱
条にクラックが生じ易くなる。その点Ｆｅは合金の強度
を上げるだけでなく金属組織を微細にし成形性も向上さ
せるので好都合である。しかし反面Ｆｅを含む化合物が
増えるとそれが再結晶核発生位置となるため再結晶し易
く、耐熱性が低下することになるが、この点は後述する
ＺｒやＣｕの添加によって十分補うことができる。ここ
でＦｅが０．０３wt％未満では強度向上および成形性向
上効果が十分でなく、０．８wt％を越えるとＦｅを含む
化合物が粗大となり、成形性、耐熱性が低下する。The function of each element of the present invention and the reason for limiting the amount added will be described below. First, Si improves the strength of the alloy, facilitates the crystallization and precipitation of Fe, and together with Fe, Al-Fe.
Making a Si-based compound. In general, the dissimilar element in Al has a smaller decrease in thermal conductivity in the compound state than in the solid solution state.
If Si is less than 0.03 wt%, these effects are not sufficient, and if it exceeds 0.6 wt%, it becomes a coarse compound and the formability is deteriorated, and cracks are likely to occur during press fitting into the magnetron. Fe increases the strength of the alloy and makes the metal structure finer to improve the formability. When the amount of Fe increases, the number of compounds containing Fe increases, and this compound becomes the re-nucleation generation position. Therefore, the number of re-crystallized nuclei increases and the metal structure becomes fine. In the case of an aluminum alloy for a magnetron heat dissipation strip, since it is attached to the magnetron by press fitting, if the formability is low, the heat dissipation strip is likely to crack. In that respect, Fe is advantageous because it not only increases the strength of the alloy but also makes the metal structure finer and improves the formability. On the other hand, when the amount of Fe-containing compound increases, it becomes a recrystallization nucleus generation position, so that recrystallization easily occurs and the heat resistance decreases, but this point can be sufficiently compensated by the addition of Zr or Cu described later. .. If Fe is less than 0.03 wt%, the effect of improving strength and moldability is not sufficient, and if it exceeds 0.8 wt%, the Fe-containing compound becomes coarse and moldability and heat resistance are deteriorated.
【０００６】Ｃｕは熱伝導度をあまり低下させずに合金
の強度を上げるが、延性が低下するため成形性が劣化す
る。そこで上記したようにＦｅは成形性を向上させるの
でＣｕと共に添加することにより互いの欠点を補い合う
ことになる。すなわち耐熱性の低下を抑えるためＦｅの
添加を減らし、その分Ｃｕにより強度を高めＣｕ添加に
よる成形性の劣化はＦｅにより改善される。ここでＣｕ
が０．００３wt％未満では強度向上効果が十分でなく、
０．３wt％を越えると延性低下が大きくなり成形性が劣
化する。しかしてＺｒは、Ａｌ中に固溶した状態でも耐
熱性を向上させるが、その合金の熱伝導度をかなり低下
させる。しかしＡｌ3 Ｚｒの化合物として微細で密に析
出させると熱伝導度を殆ど低下させることなく、耐熱性
を固溶した状態以上に向上させることができる。この場
合Ａｌ3 Ｚｒの粒子が転位の移動を妨害し、再結晶を遅
らせることにより耐熱性を向上させるがＡｌ3 Ｚｒ粒子
が微細で密に分布している程この効果は大きい。このＺ
ｒは０．０２wt％未満では効果が十分でなく、０．２５
wt％を越えるとＡｌ3 Ｚｒが粗大となり転位の移動妨害
効果が低下するだけでなく成形性も劣化する。また、本
発明においては２０℃における導電率が５０％ＩＡＣＳ
以上であることが望ましく、これはアルミニウム合金の
場合、一般に熱伝導度と導電率とは略直線関係にあり導
電率が５０％ＩＡＣＳ以上あればマグネトロン放熱条用
アルミニウム合金として実用上問題のない熱伝導度が得
られるからである。Cu raises the strength of the alloy without significantly lowering the thermal conductivity, but the ductility decreases and the formability deteriorates. Therefore, as described above, Fe improves the formability, so that by adding together with Cu, the respective defects will be complemented. That is, the addition of Fe is reduced in order to suppress the decrease in heat resistance, and the strength is increased by Cu, and the deterioration of the formability due to the addition of Cu is improved by Fe. Where Cu
Is less than 0.003 wt%, the strength improving effect is not sufficient,
If it exceeds 0.3 wt%, the ductility is greatly reduced and the formability is deteriorated. Although Zr improves the heat resistance even in a solid solution state in Al, it considerably lowers the thermal conductivity of the alloy. However, if a fine and dense Al 3 Zr compound is deposited, the heat conductivity can be improved to a level higher than that in the solid solution state without substantially lowering the thermal conductivity. In this case, the Al 3 Zr particles hinder the movement of dislocations and delay the recrystallization to improve the heat resistance, but this effect is greater as the Al 3 Zr particles are finer and densely distributed. This Z
If r is less than 0.02 wt%, the effect is not sufficient, and 0.25
When it exceeds wt%, Al 3 Zr becomes coarse and not only the movement impeding effect of dislocations lowers but also the formability deteriorates. Further, in the present invention, the conductivity at 20 ° C. is 50% IACS
In the case of an aluminum alloy, the heat conductivity and the conductivity are generally in a substantially linear relationship, and if the conductivity is 50% IACS or more, it is a heat which is practically no problem as an aluminum alloy for a magnetron heat dissipation strip. This is because conductivity can be obtained.
【０００７】次に本発明合金において残部のＡｌ量を９
９．０wt％以上とすることが望ましい。これは不純物量
または不純物以外の添加元素の量は、多い程熱伝導度
（導電率）が低下するが残部のＡｌ量は９９．０wt％以
上であれば従来材料に比べて殆ど低下しない材料が得ら
れるからである。したがって添加元素以外のアルミニウ
ムの不純物Ｔｉ、Ｍｎなどの他鋳塊の結晶粒微細化剤と
して用いられるＴｉやＢは添加しても差支えない。また
Ｃｒ、Ｍｎなど再結晶粒を微細化して成形性を向上させ
るような元素などをいずれも残部Ａｌ量が９９．０wt％
以上となる範囲内で含有してもよい。次に本発明の製造
方法について説明すると、上記のようにＺｒはＡｌ3 Ｚ
ｒの化合物として析出し、転位の移動を妨げるために再
結晶が遅れ、その結果耐熱性が向上するものであるが、
この化合物は微細で密に分布しているほど転位の移動を
妨害する効果が大きく、均質化処理温度が低い程、微細
で密に析出し、高温になるほど粗大で疎となる。また均
質化処理温度が高い程、Ｚｒおよび不純物であるＦｅや
Ｓｉの固溶量が多くなり熱伝導度が低下する。しかし均
質化処理温度が低過ぎるとＡｌ3 ＺｒやＦｅを含む化合
物が析出しなかったり、またはこれらが析出するのに長
時間を要することになる。したがって均質化処理温度は
４００〜５８０℃が適当であり、４００℃未満ではＡｌ
3 Ｚｒを析出させるのに長時間を要するため生産性やコ
ストの面で不利となり、５８０℃を越えるとＡｌ3Ｚｒ
が粗大で疎となり耐熱性向上効果が低下するだけでなく
成形性や熱伝導度も低下する。Next, in the alloy of the present invention, the balance of Al content is set to 9
It is desirable to set it to 9.0 wt% or more. This means that the thermal conductivity (conductivity) decreases as the amount of impurities or the amount of additional elements other than impurities increases, but if the remaining amount of Al is 99.0 wt% or more, there is almost no decrease in material compared with conventional materials. This is because it can be obtained. Therefore, it does not matter if Ti or B used as a grain refiner for other ingots such as impurities Ti and Mn of aluminum other than the additive element is added. In addition, the balance of Al content is 99.0 wt% for elements such as Cr and Mn that improve the formability by refining recrystallized grains.
It may be contained within the above range. Next, the production method of the present invention will be described. As described above, Zr is Al 3 Z
Although it precipitates as a compound of r and retards the movement of dislocations, recrystallization is delayed, and as a result, heat resistance is improved.
The finer and denser the distribution of this compound is, the greater the effect of hindering the movement of dislocations is. Further, the higher the homogenization temperature is, the larger the amount of Zr and the solid solution of Fe and Si that are impurities becomes, and the thermal conductivity decreases. However, if the homogenization temperature is too low, compounds containing Al 3 Zr and Fe will not be deposited, or it will take a long time for these to be deposited. Therefore, the homogenization treatment temperature is suitably 400 to 580 ° C., and if it is less than 400 ° C.
It takes a long time to precipitate 3 Zr, which is disadvantageous in terms of productivity and cost, and when it exceeds 580 ° C, Al 3 Zr
Is coarse and sparse, and not only the heat resistance improving effect is lowered, but also the formability and the thermal conductivity are lowered.
【０００８】[0008]
【実施例】以下に本発明の一実施例について説明する。 実施例１ 従来例（９９．０wt％Ａｌ）をベースとして（但しNo．
８は９９．８５wt％Ａｌをベースとする）これに表１に
示すようにＺｒ量を変えた合金のＤＣ鋳塊に５２０℃で
３時間の均質化処理を施した後４００〜５００℃で熱間
圧延し４０〜５０％の圧延率で冷間圧延により厚さ０．
６mmの素板とした。これらの素板について導電率、熱伝
導性、再結晶終了温度、穴拡がり率を調べた結果を表２
に示した。なお熱伝導性は厚さ０．６mm、巾３０mm、長
さ２００mmの試験片の一端を加熱し、他端の温度変化に
より評価した。再結晶終了温度は各温度で２時間保持し
た場合の熱軟化曲線を引張試験により求め軟化が終了し
たときの温度である。また穴拡がり率はブランク径７６
mm、穴径１２mm、ポンチ径３３mm、しわ押え力１０００
kgで穴拡げ試験を行った。EXAMPLE An example of the present invention will be described below. Example 1 Based on a conventional example (99.0 wt% Al) (however, No.
No. 8 is based on 99.85 wt% Al). As shown in Table 1, DC ingots of alloys with different Zr contents were homogenized at 520 ° C for 3 hours and then heated at 400-500 ° C. Cold rolling at a rolling rate of 40 to 50% to a thickness of 0.
It was a 6 mm blank plate. Table 2 shows the results of examining the electric conductivity, thermal conductivity, recrystallization end temperature, and hole expansion rate of these base plates.
It was shown to. The thermal conductivity was evaluated by heating one end of a test piece having a thickness of 0.6 mm, a width of 30 mm and a length of 200 mm and changing the temperature at the other end. The recrystallization end temperature is a temperature at which softening is completed by obtaining a thermal softening curve by a tensile test when holding each temperature for 2 hours. In addition, the hole expansion ratio is a blank diameter of 76.
mm, hole diameter 12 mm, punch diameter 33 mm, wrinkle holding force 1000
A hole expansion test was conducted in kg.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【表２】 [Table 2]
【００１１】表１および表２から明らかなように本発明
によるものは従来例に比べ熱伝導度の低下を最小限に抑
え成形性を劣化させることなく強度と耐熱性の高いもの
が得られる。また残部Ａｌ量の多いものは熱伝導性（導
電率）が非常に良好なものが得られる。一方比較例２の
Ｓｉ、Ｆｅの含有量の少ないものは、強度および成形性
が低下し、また比較例９のＳｉ量の多いもの、比較例１
０のＣｕの多いもの、比較例１１のＺｒの多いものは、
いずれも熱伝導度（導電率）が低く、成形性も悪くなる
ことが判る。 実施例２ 実施例１におけるNo．５と同じ組成（Ｓｉ０．１７wt
％、Ｆｅ０．５０wt％、Ｃｕ０．１２wt％、Ｚｒ０．１
２wt％、Ａｌ９９．８wt％）の合金のＤＣ鋳塊に表３に
示す条件の均質化処理を施した後、実施例１と同一条件
で熱間圧延、冷間圧延を行い厚さ０．６mmの素板とし
た。これらの素板について実施例１と同様にして導電
率、熱伝導性、再結晶終了温度、穴拡がり率を調整し
た。この結果を表４に示した。As is clear from Tables 1 and 2, the one according to the present invention has a high strength and a high heat resistance without deteriorating the moldability by minimizing the decrease in the thermal conductivity as compared with the conventional example. Further, when the residual Al content is large, the thermal conductivity (electrical conductivity) is very good. On the other hand, Comparative Example 2 with a low Si and Fe content has low strength and moldability, and Comparative Example 9 with a high Si content, Comparative Example 1
0 containing a large amount of Cu and Comparative Example 11 containing a large amount of Zr
It can be seen that both have low thermal conductivity (conductivity) and poor moldability. Example 2 No. in Example 1 Same composition as 5 (Si 0.17 wt
%, Fe 0.50 wt%, Cu 0.12 wt%, Zr 0.1
A DC ingot of an alloy of 2 wt% and Al 99.8 wt%) was homogenized under the conditions shown in Table 3 and then hot-rolled and cold-rolled under the same conditions as in Example 1 to obtain a thickness of 0.6 mm. It was used as a blank plate. The electric conductivity, thermal conductivity, recrystallization end temperature, and hole expansion ratio of these base plates were adjusted in the same manner as in Example 1. The results are shown in Table 4.
【００１２】[0012]
【表３】 [Table 3]
【００１３】[0013]
【表４】 [Table 4]
【００１４】表３および表４から明らかなように本発明
の均質化処理条件によるものは、いずれも熱伝導度（導
電率）の低下を最小限に抑え耐熱性を向上させることが
できる。一方比較例No．１２は処理温度が低いため、ま
た比較例No．１６は処理温度が高いため耐熱性の向上は
見られないことが判る。As is clear from Tables 3 and 4, under the homogenization treatment conditions of the present invention, the heat conductivity (conductivity) can be minimized and the heat resistance can be improved. On the other hand, Comparative Example No. No. 12 has a low treatment temperature, and therefore Comparative Example No. It can be seen that No. 16 does not show any improvement in heat resistance because the treatment temperature is high.
【００１５】[0015]
【効果】以上に説明したように本発明によれば、熱伝導
度の低下を少なくして強度および耐熱性を向上させたマ
グネトロン放熱条用アルミニウム合金が得られるもので
工業上顕著な効果を奏するものである。[Effect] As described above, according to the present invention, an aluminum alloy for a magnetron heat dissipation strip having a reduced thermal conductivity and an improved strength and heat resistance can be obtained, which has a remarkable industrial effect. It is a thing.
Claims (4)
３〜０．８wt％、Ｃｕ０．００３〜０．３wt％およびＺ
ｒ０．０２〜０．２５wt％を含み残部Ａｌからなるマグ
ネトロン放熱条用アルミニウム合金。1. Si0.03-0.6 wt%, Fe0.0
3 to 0.8 wt%, Cu 0.003 to 0.3 wt% and Z
An aluminum alloy for a magnetron heat dissipation strip containing 0.02-0.25 wt% r and the balance Al.
以上であることを特徴とする請求項１記載のマグネトロ
ン放熱条用アルミニウム合金。2. The conductivity at 20 ° C. is 50% IACS.
It is above, The aluminum alloy for magnetron heat dissipation strips of Claim 1 characterized by the above-mentioned.
囲において通常のアルミニウムの不純物Ｔｉ、Ｍｎまた
はＢ、Ｃｒの１種または２種以上を含有することを特徴
とする請求項１または２記載のマグネトロン放熱条用ア
ルミニウム合金。3. The method according to claim 1 or 2, which contains one or more of usual aluminum impurities Ti, Mn or B and Cr in the range where the balance Al is 99.0% or more. Aluminum alloy for magnetron heat dissipation strip as described in 2.
３〜０．８wt％、Ｃｕ０．００３〜０．３wt％およびＺ
ｒ０．０２〜０．２５wt％を含み残部Ａｌからなる合金
を４００〜５８０℃の温度範囲で均質化処理を行うこと
を特徴とするマグネトロン放熱条用アルミニウム合金の
製造方法。4. Si0.03-0.6 wt%, Fe0.0
3 to 0.8 wt%, Cu 0.003 to 0.3 wt% and Z
A method for producing an aluminum alloy for magnetron heat dissipation strip, which comprises homogenizing an alloy containing 0.02 to 0.25 wt% of r and a balance of Al in a temperature range of 400 to 580 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28369691A JPH0598377A (en) | 1991-10-03 | 1991-10-03 | Aluminum alloy for magnetron heat radiation bar and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28369691A JPH0598377A (en) | 1991-10-03 | 1991-10-03 | Aluminum alloy for magnetron heat radiation bar and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0598377A true JPH0598377A (en) | 1993-04-20 |
Family
ID=17668898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28369691A Pending JPH0598377A (en) | 1991-10-03 | 1991-10-03 | Aluminum alloy for magnetron heat radiation bar and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0598377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004003936A1 (en) * | 2002-06-28 | 2004-01-08 | Sumitomo Precision Products Co., Ltd. | Conductor for movable electric circuit and vibration type gyro |
-
1991
- 1991-10-03 JP JP28369691A patent/JPH0598377A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004003936A1 (en) * | 2002-06-28 | 2004-01-08 | Sumitomo Precision Products Co., Ltd. | Conductor for movable electric circuit and vibration type gyro |
| US7188524B2 (en) | 2002-06-28 | 2007-03-13 | Sumitomo Precision Products, Co., Ltd | Conductive element for a movable electric circuit and a vibration gyroscope |
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