JP4637682B2 - Solid electrolytic capacitor - Google Patents
Solid electrolytic capacitor Download PDFInfo
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- JP4637682B2 JP4637682B2 JP2005240142A JP2005240142A JP4637682B2 JP 4637682 B2 JP4637682 B2 JP 4637682B2 JP 2005240142 A JP2005240142 A JP 2005240142A JP 2005240142 A JP2005240142 A JP 2005240142A JP 4637682 B2 JP4637682 B2 JP 4637682B2
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- 239000003990 capacitor Substances 0.000 title claims description 30
- 239000007787 solid Substances 0.000 title claims description 27
- 239000011347 resin Substances 0.000 claims description 29
- 229920005989 resin Polymers 0.000 claims description 29
- 238000007639 printing Methods 0.000 claims description 13
- 238000007648 laser printing Methods 0.000 claims description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Details Of Resistors (AREA)
Description
本発明は、固体電解コンデンサに関し、特に、小形化した固体電解コンデンサの文字および極性表示に関するものである。 The present invention relates to a solid electrolytic capacitor, and more particularly, to a character and polarity display of a miniaturized solid electrolytic capacitor.
近年、固体電解コンデンサに対する軽薄短小化の要求が進み、1.6mm×0.8mmの外形寸法の樹脂モールド形タンタル固体電解コンデンサを実用化するに至っている。図1に、かかる固体電解コンデンサの斜視図を示し、図2に上面図、図3に側面図を示す。図1、3に示すように、外装樹脂1の側面から陽極引出しリード端子2aおよび陰極引出しリード端子2bが導出され、該リード端子は表面実装用にリードフォーミングされている。
In recent years, the demand for light, thin, and small solid electrolytic capacitors has progressed, and resin-molded tantalum solid electrolytic capacitors having an outer dimension of 1.6 mm × 0.8 mm have been put into practical use. FIG. 1 shows a perspective view of such a solid electrolytic capacitor, FIG. 2 shows a top view, and FIG. 3 shows a side view. As shown in FIGS. 1 and 3, an anode lead lead terminal 2a and a cathode lead lead terminal 2b are led out from the side surface of the
固体電解コンデンサは、全て製品の品番等を表す文字を表示する必要がある。上記のように外装樹脂1の外形寸法が小さくなると、当然、外装樹脂1の文字表示エリア3も小さくなり、インクによる印刷方法では文字表示が困難になるため、文字表示エリア3を鏡面仕上げし、レーザーによって、文字表示4の周囲を削り取り、文字を浮き上がらせる形で印刷していた。
All solid electrolytic capacitors need to display characters representing the product number and the like. When the outer dimensions of the
また、固体電解コンデンサは、文字の他にリード端子の極性を表す極性表示5を印刷する必要がある。従来、外装樹脂の寸法が比較的大きい通常の固体電解コンデンサでは、この極性をインク印刷、レーザー印刷、または、レーザー印刷を行った上からインク印刷を行うことにより表示していた(例えば、特許文献1参照)。
近年、固体電解コンデンサの小形化が進み、それに伴い外装樹脂の肉厚が薄くなっている。上記のレーザー印刷による方法は、さらに肉厚を部分的に薄くさせるため、製品の信頼性が悪化するという問題がある。また、インク印刷は、外装樹脂の端部から一定の余裕をみた文字表示エリア3のみしか印刷できないため、狭い文字表示エリア3を浪費する問題がある。
In recent years, the miniaturization of solid electrolytic capacitors has progressed, and the thickness of the exterior resin has been reduced accordingly. The laser printing method has a problem that the reliability of the product is deteriorated because the thickness is further partially reduced. In addition, ink printing can print only the
上記課題を解決するため、本発明は、固体電解コンデンサ素子に、陽極引出しリード端子および陰極引出しリード端子を接続、導出した後、樹脂外装された外装樹脂上部に文字と極性を示す印刷を施してなる固体電解コンデンサにおいて、
外装樹脂上部の一部を鏡面状態にして、レーザー印刷による文字表示部とし、外装樹脂上部の陽極リード端子側を梨子地状態にしてインク印刷による極性表示部とし、
上記文字表示部が、レーザーで文字を掘り込むレーザー印刷であることを特徴とする固体電解コンデンサである。
In order to solve the above-mentioned problems, the present invention provides a solid electrolytic capacitor element in which an anode lead lead terminal and a cathode lead lead terminal are connected and led out, and then printed on the upper part of the resin-coated outer resin to indicate characters and polarity. In the solid electrolytic capacitor
A part of the exterior resin upper part is made into a mirror surface state, and it is a character display part by laser printing, and the anode lead terminal side of the exterior resin upper part is a pear-finished state to be a polarity display part by ink printing,
In the solid electrolytic capacitor, the character display portion is laser printing in which characters are dug with a laser.
本発明によれば、鏡面状態に仕上げた文字表示エリア3に文字を掘り込むレーザー印刷とすることで、印刷内容の複雑な品番マーク、ロットNoを狭いエリアでも精度よく印刷することができ、かつ視認性もよい状態を保つことができ、
また、梨子地状態に仕上げた極性表示部にインク印刷をすることで、極性表示が鮮明にでき、かつ極性の判読を明確にすることができるため、検査工程における極性の誤読を防止することができる。
さらに、文字印刷エリアにおいて、レーザー処理で削り取る部分が少なく、かつ、レーザー処理で極性表示部の樹脂外装部分を薄くすることがないため、漏れ電流が良好な固体電解コンデンサを得ることができる。
According to the present invention, it is possible to accurately print a complicated part number mark and lot No. of a print content even in a narrow area by laser printing that digs characters into the
In addition, by printing ink on the polarity display section finished in a pear-finished state, the polarity display can be made clear and the interpretation of the polarity can be clarified, so that misreading of the polarity in the inspection process can be prevented. it can.
Furthermore, in the character printing area, there are few portions to be scraped off by laser processing, and the resin exterior portion of the polarity display portion is not thinned by laser processing, so that a solid electrolytic capacitor with good leakage current can be obtained.
[実施例]
次に、本発明の実施例について図面を参照して説明する。
図1は、本実施例による固体電解コンデンサの斜視図である。
まず、弁作用金属であるタンタル粉末に陽極リード線を埋設した状態で、所定の形状に成形し、焼結した焼結体に、誘電体として酸化皮膜層を形成し、さらにその皮膜層上に二酸化マンガン層、カーボン層、銀層を順次形成し、コンデンサ素子とした。次に、コンデンサ素子の陽極リード線と陽極引出しリード端子2aを抵抗溶接で接続し、コンデンサ素子と陰極引出しリード端子2bを導電性接着剤を介して接続する。その後、モールド後の文字表示エリア3の表面を鏡面状態にし、極性表示部の表面を粗面度5.0〜8.0μmの梨子地状態にする成形金型を用いて、外装樹脂1をトランスファーモールドにより形成した。
[Example]
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a solid electrolytic capacitor according to this embodiment.
First, an oxide lead layer is formed as a dielectric on a sintered body that is molded into a predetermined shape and sintered in a state where an anode lead wire is embedded in tantalum powder that is a valve action metal. A manganese dioxide layer, a carbon layer, and a silver layer were sequentially formed to obtain a capacitor element. Next, the anode lead wire of the capacitor element and the anode lead terminal 2a are connected by resistance welding, and the capacitor element and the cathode lead terminal 2b are connected via a conductive adhesive. Thereafter, the
次に、鏡面状態の文字表示エリア3にレーザー照射して表面を8〜10μmの深さに掘り込み、文字表示4をレーザー印刷にて形成し、さらに、梨子地状態である極性表示部にUV硬化インクを塗布し、UV照射により30秒間硬化させ、極性表示5をインク印刷にて形成した。その後、リード端子のフォーミングを行い、長さ1.6mm、巾0.8mm、高さ0.8mmのチップ形固体電解コンデンサを作製した。
Next, the
[比較例1]
外装樹脂表面が、梨子地状態となる成形金型で、外装樹脂をトランスファーモールドし、文字表示、および極性表示を共にレーザー印刷で行った以外は、実施例と同様の方法で固体電解コンデンサを作製した。
[Comparative Example 1]
A solid electrolytic capacitor is produced in the same manner as in the example except that the exterior resin surface is a molding die that is in a pear-finished state, the exterior resin is transfer molded, and both character display and polarity display are performed by laser printing. did.
[比較例2]
外装樹脂表面に、梨子地状態となる成形金型で、外装樹脂をトランスファーモールドし、文字表示、および極性表示を共にインク印刷で行った以外は、実施例と同様の方法で固体電解コンデンサを作製した。
[Comparative Example 2]
A solid electrolytic capacitor was produced in the same manner as in the example except that the exterior resin was molded on the surface of the exterior resin using a mold that was in a pear-finished state, and the exterior resin was transfer molded and both the character display and polarity display were performed by ink printing. did.
[比較例3]
外装樹脂表面に、鏡面状態となる成形金型で、外装樹脂をトランスファーモールドし、文字表示、および極性表示を共にレーザー印刷で行った以外は、実施例と同様の方法で固体電解コンデンサを作製した。
[Comparative Example 3]
A solid electrolytic capacitor was produced in the same manner as in Example, except that the outer resin was transfer-molded with a molding die in a mirror state on the outer resin surface, and both character display and polarity display were performed by laser printing. .
[比較例4]
外装樹脂表面に、鏡面状態となる成形金型で、外装樹脂をトランスファーモールドし、文字表示、および極性表示を共にインク印刷で行った以外は、実施例と同様の方法で固体電解コンデンサを作製した。
[Comparative Example 4]
A solid electrolytic capacitor was produced in the same manner as in Example, except that the outer resin was transfer-molded with a molding die that was in a mirror state on the outer resin surface, and both character display and polarity display were performed by ink printing. .
上記実施例、比較例1〜4について、印刷後のマーキング判読不良率を確認し、また半田付け(260℃、10秒リフロー)後の耐湿負荷試験(85℃、85%、500時間)を行い、漏れ電流不良率を確認した。確認した結果を表1に示す。 About the said Example and Comparative Examples 1-4, the marking misreading rate after printing was confirmed, and the moisture-proof load test (85 degreeC, 85%, 500 hours) after soldering (260 degreeC, 10 second reflow) was done. The leakage current failure rate was confirmed. The confirmed results are shown in Table 1.
実施例は、比較例1〜4と比較し、マーキング判読不良率、漏れ電流不良率とも改善されている。これは、極性表示部が、梨子地状態であるため、形成された凹凸部にUVインクが浸透し、剥れ難く、鮮明な極性表示がなされ、かつ、文字表示エリアが鏡面状態であるため、光沢があり、極性表示と明確に識別できるためである。
さらに、文字印刷エリアのレーザーで削り取る外装樹脂部分が少なく、かつ極性表示部をレーザーで削り取る必要が無いため、漏れ電流特性が良好な固体電解コンデンサを得ることができる。
Compared with Comparative Examples 1 to 4, the examples are improved in both the marking reading failure rate and the leakage current failure rate. This is because the polarity display portion is in a pear-skinned state, so that UV ink penetrates into the formed uneven portion, is not easily peeled off, a clear polarity display is made, and the character display area is in a mirror surface state. This is because it is glossy and can be clearly distinguished from polar display.
Furthermore, since there are few exterior resin parts scraped off with the laser of a character printing area, and it is not necessary to scrape off a polarity display part with a laser, the solid electrolytic capacitor with a favorable leakage current characteristic can be obtained.
1 外装樹脂
2a 陽極引出しリード端子
2b 陰極引出しリード端子
3 文字表示エリア
4 文字表示
5 極性表示
6 外装樹脂上部
DESCRIPTION OF
Claims (1)
外装樹脂上部の一部を鏡面状態にして、レーザー印刷による文字表示部とし、外装樹脂上部の陽極リード端子側を梨子地状態にしてインク印刷による極性表示部とし、
上記文字表示部が、レーザーで文字を掘り込むレーザー印刷であることを特徴とする固体電解コンデンサ。 In the solid electrolytic capacitor in which the anode lead lead terminal and the cathode lead lead terminal are connected to the solid electrolytic capacitor element, and after the lead is connected, the printed resin showing the letter and polarity is applied to the upper part of the resin-coated outer resin.
A part of the exterior resin upper part is made into a mirror surface state, and it is a character display part by laser printing, and the anode lead terminal side of the exterior resin upper part is a pear-finished state to be a polarity display part by ink printing,
A solid electrolytic capacitor, wherein the character display portion is laser printing for digging characters with a laser.
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JP4637682B2 true JP4637682B2 (en) | 2011-02-23 |
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US7203053B2 (en) | 2005-04-07 | 2007-04-10 | American Radionic Company, Inc. | Capacitor for multiple replacement applications |
US11183336B2 (en) | 2005-04-07 | 2021-11-23 | Amrad Manufacturing, Llc | Capacitor with multiple elements for multiple replacement applications |
US11183337B1 (en) | 2005-04-07 | 2021-11-23 | Amrad Manufacturing, Llc | Capacitor with multiple elements for multiple replacement applications |
US9412521B2 (en) | 2005-04-07 | 2016-08-09 | American Radionic Company, Inc. | Capacitor with multiple elements for multiple replacement applications |
US11183338B2 (en) | 2005-04-07 | 2021-11-23 | Amrad Manufacturing, Llc | Capacitor with multiple elements for multiple replacement applications |
WO2008083270A1 (en) | 2006-12-29 | 2008-07-10 | American Radionic Company, Inc. | Electrolytic capacitor |
US9318261B2 (en) | 2013-05-21 | 2016-04-19 | American Radionic Company, Inc. | Power factor correction capacitors |
US11195663B2 (en) | 2017-05-12 | 2021-12-07 | Amrad Manufacturing, Llc | Capacitor with multiple elements for multiple replacement applications |
US11424077B1 (en) | 2017-12-13 | 2022-08-23 | Amrad Manufacturing, Llc | Hard start kit for multiple replacement applications |
US10586655B1 (en) | 2018-12-28 | 2020-03-10 | American Radionic Company, Inc. | Capacitor with multiple elements for multiple replacement applications |
USD906247S1 (en) | 2019-07-11 | 2020-12-29 | American Radionic Company, Inc. | Capacitor |
US11575298B2 (en) | 2021-04-30 | 2023-02-07 | Amrad Manufacturing, Llc | Hard start kit for multiple replacement applications |
WO2023286655A1 (en) * | 2021-07-12 | 2023-01-19 | 株式会社村田製作所 | Ceramic component |
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JPH0289815U (en) * | 1988-12-27 | 1990-07-17 | ||
JPH0548324U (en) * | 1991-11-29 | 1993-06-25 | 関西日本電気株式会社 | Electronic parts |
JPH0587939U (en) * | 1991-06-03 | 1993-11-26 | ニチコン株式会社 | Electrolytic capacitor |
JPH07211596A (en) * | 1994-01-21 | 1995-08-11 | Sanyo Electric Co Ltd | Electronic component and its manufacture |
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Patent Citations (5)
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JPS6031218A (en) * | 1983-07-29 | 1985-02-18 | 日本ケミコン株式会社 | Leadless electronic part |
JPH0289815U (en) * | 1988-12-27 | 1990-07-17 | ||
JPH0587939U (en) * | 1991-06-03 | 1993-11-26 | ニチコン株式会社 | Electrolytic capacitor |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |