JP2017209734A - Flux for solder and solder composition - Google Patents

Flux for solder and solder composition Download PDF

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JP2017209734A
JP2017209734A JP2017174011A JP2017174011A JP2017209734A JP 2017209734 A JP2017209734 A JP 2017209734A JP 2017174011 A JP2017174011 A JP 2017174011A JP 2017174011 A JP2017174011 A JP 2017174011A JP 2017209734 A JP2017209734 A JP 2017209734A
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acid
flux
solder
solder paste
soldering
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拓郎 不可三
Takuo Fukami
拓郎 不可三
西村 哲郎
Tetsuro Nishimura
哲郎 西村
藤原 健
Takeshi Fujiwara
健 藤原
祐子 城下
Yuko Jonoshita
祐子 城下
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Nihon Superior Sha Co Ltd
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Nihon Superior Sha Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a flux composition which minimizing a flux residue after soldering, and to provide a solder paste which contains the flux composition.SOLUTION: A solder paste using a flux composition satisfying the following two conditions can minimize a flux residue amount after soldering. (1) One selected from a malonic acid, a succinic acid, a glutaric acid, an adipic acid, a suberic acid, an azelaic acid, a sebacic acid, a maleic acid, a citric acid, a tartaric acid and a benzoic acid of 4.55 mmol/g-45.5 mmol/g as an activator as a flux composition with respect to an amount of flux of 100 g, and a solvent are used. (2) Components other than the solder powder contained in a solder paste vaporizes at a temperature at which the solder is molten, or lower.SELECTED DRAWING: None

Description

本発明は、はんだ付け性に優れ、フラックスの残渣が極めて少ないはんだ用フラックス及びそれを用いたソルダペーストに関するものである。   The present invention relates to a solder flux excellent in solderability and having very little flux residue, and a solder paste using the same.

近年、ソルダペーストは、プリント基板等の表面実装の主流になってきている。
従来、ソルダペーストは、はんだ粉末と基材としてのロジン等の樹脂、金属表面の洗浄等目的の有機酸等の活性剤、粘度調製剤としてのチクソ剤、及び溶剤等からなるフラックスとを混合したペースト状のものである。
そして、プリント基板上の電子部品等と接合したい部分にスクリーン印刷等にて塗布され、はんだ付けに用いられる。
In recent years, solder paste has become mainstream for surface mounting of printed circuit boards and the like.
Conventionally, solder paste is a mixture of solder powder and resin such as rosin as a base material, an activator such as an organic acid for cleaning the metal surface, a thixotropic agent as a viscosity adjusting agent, and a flux made of a solvent. It is pasty.
And it apply | coats to the part to join with the electronic component etc. on a printed circuit board by screen printing etc., and is used for soldering.

そして、プリント基板と電子部品が、ソルダペーストを用いてはんだ接合した場合、ソルダペースト中に含有するフラックス組成の一部がはんだ接合後にプリント基板並びにはんだ接合部に残存する場合があり、プリント基板や電子部品に対し不具合を発生させることが問題となっている。 And when a printed circuit board and an electronic component are soldered using a solder paste, a part of the flux composition contained in the solder paste may remain in the printed circuit board and the soldered part after soldering. There is a problem in causing defects to electronic components.

そこで、はんだ付けの際に残存するフラックス残渣を低減したソルダペーストが検討されている。
例えば、特許文献1では、常温付近で液状となる揮発性脂肪族カルボン酸を揮発性の有機溶媒に溶解した金錫合金ハンダフラックスが開示されている。
また、特許文献2では、特定のロジン類を用いることにより、フラックス残渣を低減したフラックスが開示されている。
そして、特許文献3では、ポリアルキルメタクリレート及びステアリン酸アミドを含有させたフラックスを用いることにより、無残渣となるソルダペーストが開示されている。
Therefore, a solder paste in which a flux residue remaining at the time of soldering is reduced has been studied.
For example, Patent Document 1 discloses a gold-tin alloy solder flux obtained by dissolving a volatile aliphatic carboxylic acid that is liquid near normal temperature in a volatile organic solvent.
Moreover, in patent document 2, the flux which reduced the flux residue is disclosed by using specific rosins.
And in patent document 3, the solder paste used as a residue is disclosed by using the flux containing polyalkylmethacrylate and stearic acid amide.

特開2003−305589号公報JP 2003-305589 A 特開2011−224652号公報Japanese Patent Laid-Open No. 2011-224652 特開2013−132654号公報JP 2013-132654 A

本発明は、はんだ付け後のフラックス残渣が極めて少ない状態となるフラックス組成物ならびに当該フラックス組成物を含有したソルダペーストの提供を目的とする。   An object of the present invention is to provide a flux composition in which the amount of flux residue after soldering is extremely small, and a solder paste containing the flux composition.

発明者らは、ソルダペーストに含有されるフラックス組成物の組成に着目し検討したところ、マロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸から選ばれる1種を当該フラックス量100gに対し4.55mmol/g〜45.5μmol/gと溶剤を用いることにより、課題であるはんだ付け後のフラックス残渣を極めて少なくなるように低減させることを見出し、本発明の完成に至った。   The inventors have studied paying attention to the composition of the flux composition contained in the solder paste. Malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, citric acid, By using one solvent selected from tartaric acid and benzoic acid with a solvent of 4.55 mmol / g to 45.5 μmol / g with respect to 100 g of the flux amount, the flux residue after soldering, which is a problem, is extremely reduced. The inventors have found that the reduction can be achieved, and have completed the present invention.

即ち、本発明は、(1)マロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸から選ばれる1種を当該フラックス量100gに対し4.55mmol/g〜45.5μmol/gと溶剤を用いること、(2)ソルダペーストに含有されるはんだ粉末以外の成分が、はんだの溶融する温度以下で揮発することの2つの条件を満たすフラックス組成物を用いたソルダペーストにすることにより、はんだ付け後のフラックス残渣量を極めて少なくすることを可能とした。 That is, the present invention relates to (1) one flux selected from malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, citric acid, tartaric acid, and benzoic acid. Two conditions: 4.55 mmol / g to 45.5 μmol / g and a solvent for 100 g, and (2) components other than the solder powder contained in the solder paste volatilize below the melting temperature of the solder. By using a solder paste using a flux composition that satisfies the above requirements, the amount of flux residue after soldering can be extremely reduced.

本発明のソルダペーストは、はんだ付け後のフラックス残渣を極めて少なくなるように低減しているため、極めて良好なはんだ付けが可能となる。   Since the solder paste of the present invention reduces the flux residue after soldering so as to be extremely small, extremely good soldering is possible.

本発明のはんだ用フラックス並びにそれを用いたソルダペーストについて、以下に説明する。
本発明のはんだ用フラックスは、基本組成が、活性剤及び溶剤からなり、当該活性剤としてマロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸から選ばれる1種を含有することを特徴としている。
また、マロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸の含有量としては、本発明の効果を有する範囲に於いて特に限定されないが、フラックス量100gに対して、4.55mmol/g〜45.5mmol/gが好ましい。
The solder flux of the present invention and the solder paste using the same will be described below.
The solder flux of the present invention has a basic composition consisting of an activator and a solvent. As the activator, malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, citric acid, It contains one selected from tartaric acid and benzoic acid.
Further, the contents of malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, citric acid, tartaric acid, and benzoic acid are within the range having the effects of the present invention. Although not particularly limited, 4.55 mmol / g to 45.5 mmol / g is preferable with respect to the flux amount of 100 g.

本発明のはんだ用フラックスに用いる溶剤は、本発明の効果を有する範囲に於いて特に制限はないが、エタノール、イソプロパノール,イソブタノール等のアルコール類、ブチルカルビトール,ヘキシルカルビトール等のグリコールエーテル類、エチレングリコール、ジエチレングリコール等のグリコール類、プロピオン酸エチル、安息香酸ブチル等のエステル類、n−ヘキサン、ドデカン等の炭化水素類等、1,8−テルピンモノアセテート、1,8−テルピンジアセテート等のテルペン誘導体、イソボロニルシクロヘキサノール等が例示でき、特に、イソボロニルシクロヘキサノールやテルペン誘導体が好ましい。
また、配合量も発明の効果を有する範囲に於いて特に制限はない。
The solvent used for the solder flux of the present invention is not particularly limited within the range having the effects of the present invention, but alcohols such as ethanol, isopropanol and isobutanol, and glycol ethers such as butyl carbitol and hexyl carbitol. , Glycols such as ethylene glycol and diethylene glycol, esters such as ethyl propionate and butyl benzoate, hydrocarbons such as n-hexane and dodecane, 1,8-terpine monoacetate, 1,8-terpindi Examples include terpene derivatives such as acetate, isobornylcyclohexanol and the like, and isobornylcyclohexanol and terpene derivatives are particularly preferable.
Further, the blending amount is not particularly limited as long as it has the effect of the invention.

本発明のソルダペーストに用いるはんだ粉末は、本発明の効果を有する範囲に於いて特に制限はないが、Sn−Cu−Ni系鉛フリー合金、Sn-Ag-Cu系鉛フリー合金、Sn-Zn系鉛フリー合金等に加えPb含有はんだ合金が例示でき、更に前記鉛フリーはんだ合金に、Bi、In、Sb、Ge、P、Ga、Co、Mn、Mo、Ti、Al、P、Au等の元素を添加したものも使用可能である。
また、本発明のソルダペーストに用いるはんだ粉末の粒径サイズも本発明の効果を有する範囲に於いて特に制限はなく、用途に応じ適宜粒径サイズを指定でき、複数の粒径サイズのはんだ粉末を混合してもよい。
The solder powder used in the solder paste of the present invention is not particularly limited as long as it has the effects of the present invention, but is not limited to Sn—Cu—Ni based lead free alloy, Sn—Ag—Cu based lead free alloy, Sn—Zn. Pb-containing solder alloys can be exemplified in addition to lead-free alloys such as Bi, In, Sb, Ge, P, Ga, Co, Mn, Mo, Ti, Al, P, Au, etc. Those added with elements can also be used.
Further, the particle size of the solder powder used in the solder paste of the present invention is not particularly limited within the range having the effect of the present invention, and the particle size can be appropriately specified according to the use, and the solder powder having a plurality of particle sizes can be specified. May be mixed.

本発明のソルダペーストは、上記はんだ用フラックスと上記はんだ粉末を混合したものであるが、其々の配合比率は本発明の効果を有する範囲に於いて特に制限はなく、用途や目的に応じ適宜調製することができる。 The solder paste of the present invention is a mixture of the above-mentioned solder flux and the above-mentioned solder powder, but there are no particular restrictions on the blending ratio within the range having the effects of the present invention, and the solder paste is appropriately selected according to the application and purpose. Can be prepared.

本発明のソルダペーストには、上記のはんだ用フラックス及びはんだ粉末の他に、ロジン等の樹脂成分、ステアリン酸アミド等のチクソ剤や粘度調製剤等、通常のソルダペーストに添加可能な成分を本発明の効果を有する範囲に於いて添加しても構わない。   In addition to the above solder flux and solder powder, the solder paste of the present invention includes components that can be added to ordinary solder paste, such as resin components such as rosin, thixotropic agents such as stearamide, and viscosity modifiers. You may add in the range which has the effect of invention.

本発明に関し、実施例を基に更に詳しく説明する。
ただし、本発明は、以下に示す実施例に限定されるものではない。
The present invention will be described in more detail based on examples.
However, the present invention is not limited to the following examples.

実施例に用いたソルダペーストは、以下の通りである。
(はんだ用フラックス)
表1及び表3に示す組成のフラックスを加熱溶解し調整した。
また、フラックス組成に対する活性剤組成の添加量のモル濃度を表2及び表4に示す。
なお、表1及び表3に記載の溶剤Aは日本テルペン社製テルソルブルTHA-90、溶剤Bはイソボロニルシクロヘキサノールを使用した。
(はんだ粉末)
日本スペリア社製SN100Cはんだ合金の粒径10〜25μmのものを使用。
(ソルダペースト)
上記はんだ用フラックスを9質量%、はんだ粉末91質量%混合し、ソルダペーストとし、評価に用いた。
The solder paste used in the examples is as follows.
(Solder flux)
Fluxes having the compositions shown in Tables 1 and 3 were prepared by heating and dissolving.
Tables 2 and 4 show the molar concentration of the added amount of the activator composition relative to the flux composition.
In addition, the solvent A of Table 1 and Table 3 used tersolble THA-90 by Nippon Terpene, and the solvent B used isoboronyl cyclohexanol.
(Solder powder)
Use of SN100C solder alloy made by Nippon Superior Co., Ltd. with a particle size of 10-25 μm.
(Solder paste)
9% by mass of the solder flux and 91% by mass of solder powder were mixed to obtain a solder paste, which was used for evaluation.

各ソルダペーストの評価は、以下のように実施した。
各ソルダペーストを、エーディーワイ株式会社製基板に印刷後、表5に示す1,2及び4の各チップ部品を12個、3及び5の各チップ部品を15個それぞれマイクロニック・マイデータ株式会社製マウンターにてマウントし、リフロー炉にて190℃2分間加熱して、チップを基板に接着させた試料を作製し、評価した。
Each solder paste was evaluated as follows.
After each solder paste is printed on the substrate made by ADW Corporation, 12 chip components 1, 2 and 4 shown in Table 5 and 15 chip components 3 and 5 are each Micronic Mydata Corporation The sample was mounted with a mounter and heated in a reflow furnace at 190 ° C. for 2 minutes to prepare and evaluate a sample in which the chip was adhered to the substrate.

各試料の評価方法は以下の通りである。
(マウント後)
各チップ部品が既定の位置にマウントされているかを目視にて確認。
(リフロー炉加熱後)
リフロー炉にて上記所定の条件にて加熱後、基板を90度傾け、部品の装着性を目視にて確認。
また、評価基準を表6に、評価結果を表7及び表8に其々示す。
The evaluation method for each sample is as follows.
(After mounting)
Visually check whether each chip component is mounted at a predetermined position.
(After reflow oven heating)
After heating in the reflow oven under the above-mentioned conditions, the board is tilted 90 degrees and the component mounting property is confirmed visually.
The evaluation criteria are shown in Table 6, and the evaluation results are shown in Table 7 and Table 8, respectively.

本発明の実施例の結果を表7に示す。
何れの試料も、マウント後はチップ部品が既定の位置にマウントされおり、更にリフロー炉加熱後に於いても何れの試料もチップ部品の脱落がみられなかった。
その後、ピーク温度240℃で50秒間のリフロー条件にてはんだ付けを行ったが、全て良好なはんだ付け性を示した。
そして、本発明の実施例1〜18は、基板上並びにはんだ付けされたチップ部品の周囲にはフラックス残渣がみられなかった。
The results of the examples of the present invention are shown in Table 7.
In each sample, the chip component was mounted at a predetermined position after mounting, and no chip component was dropped in any sample even after heating in the reflow furnace.
Thereafter, soldering was performed under a reflow condition of 50 seconds at a peak temperature of 240 ° C., but all showed good solderability.
In Examples 1 to 18 of the present invention, no flux residue was observed on the substrate and around the soldered chip components.

一方、表8に示す比較例では、比較例7〜比較例12が、マウント後の接着性に於いて位置ずれが発生し、マウント後の接着性が良好であった比較例1〜比較例6及び比較例13〜比較例14もリフロー炉での加熱後に於いて、チップ部品の脱落が生じた。   On the other hand, in Comparative Examples shown in Table 8, Comparative Examples 7 to 12 were misaligned in the adhesion after mounting, and the adhesion after mounting was good. Also, in Comparative Examples 13 to 14, chip parts dropped out after heating in the reflow furnace.

このように、本発明の活性剤がマロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸から選ばれる1種を当該フラックス量100gに対し4.55mmol/g〜45.5mmol/gと溶剤を含有するフラックス組成物並びにそれを用いたソルダペーストは、良好なはんだ付特性を有し、更にはんだ付けの際のフラックス残渣を極めて少なくすることを可能とした。   Thus, the active agent of the present invention is one flux selected from malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, citric acid, tartaric acid, and benzoic acid. The flux composition containing 4.55 mmol / g to 45.5 mmol / g and a solvent with respect to the amount of 100 g, and the solder paste using the same have good soldering characteristics, and further, the flux residue at the time of soldering is reduced. It was possible to reduce it extremely.

本発明のフラックス組成物及びそれを用いたソルダペーストは、はんだ付け特性に優れ、しかもはんだ付け時のフラックス残渣が極めて少ないことから、フラックス残渣による不具合も解消されるため、広く電子部品等のはんだ付けに応用が期待される。












































Since the flux composition of the present invention and the solder paste using the same are excellent in soldering characteristics and have very few flux residues at the time of soldering, defects due to the flux residue are also eliminated, so that a wide variety of solder for electronic components, etc. Application is expected for attaching.












































Claims (1)

はんだ粉末及びフラックス組成物を含有するソルダペーストに於いて、フラックス組成が活性剤及び溶剤を含有し、当該活性剤がマロン酸、コハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸、クエン酸、酒石酸、及び安息香酸から選ばれる1種であり、当該活性剤量が当該フラックス量100gに対し4.55mmol/g〜45.5mmol/gであること、更にソルダペーストに含有されるはんだ粉末以外の成分が、はんだ粉末の溶融する温度以下で揮発することを特徴とするソルダペースト。










































Solder paste containing solder powder and flux composition, the flux composition contains an activator and a solvent, and the activator is malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid , Maleic acid, citric acid, tartaric acid, and benzoic acid, and the amount of the activator is 4.55 mmol / g to 45.5 mmol / g with respect to 100 g of the flux amount. A solder paste characterized in that components other than the contained solder powder volatilize at a temperature below the melting temperature of the solder powder.










































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WO2010038668A1 (en) * 2008-10-02 2010-04-08 株式会社日本スペリア社 Flux composition and soldering paste composition
JP2012071337A (en) * 2010-09-29 2012-04-12 Koki:Kk Soldering paste and flux
JP2013173156A (en) * 2012-02-24 2013-09-05 Mitsubishi Materials Corp Method for producing solder paste, and the solder paste produced by the same
JP2014100737A (en) * 2012-11-22 2014-06-05 Tamura Seisakusho Co Ltd Solder composition for laser soldering, and printed wiring board using the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004025288A (en) * 2002-06-28 2004-01-29 Tamura Kaken Co Ltd Flux and solder paste for soldering circuit board, and circuit board used therewith
JP2008110392A (en) * 2006-10-31 2008-05-15 Harima Chem Inc Flux for soldering and solder paste composition
WO2010038668A1 (en) * 2008-10-02 2010-04-08 株式会社日本スペリア社 Flux composition and soldering paste composition
JP2012071337A (en) * 2010-09-29 2012-04-12 Koki:Kk Soldering paste and flux
JP2013173156A (en) * 2012-02-24 2013-09-05 Mitsubishi Materials Corp Method for producing solder paste, and the solder paste produced by the same
JP2014100737A (en) * 2012-11-22 2014-06-05 Tamura Seisakusho Co Ltd Solder composition for laser soldering, and printed wiring board using the same

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