WO2004111287A2 - 無電解金めっき液 - Google Patents
無電解金めっき液 Download PDFInfo
- Publication number
- WO2004111287A2 WO2004111287A2 PCT/JP2004/004656 JP2004004656W WO2004111287A2 WO 2004111287 A2 WO2004111287 A2 WO 2004111287A2 JP 2004004656 W JP2004004656 W JP 2004004656W WO 2004111287 A2 WO2004111287 A2 WO 2004111287A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plating solution
- group
- gold
- electroless
- compound
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/42—Coating with noble metals
- C23C18/44—Coating with noble metals using reducing agents
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
- H05K3/244—Finish plating of conductors, especially of copper conductors, e.g. for pads or lands
Definitions
- the present invention relates to a plating technique, and to an electroless plating solution.
- Electroless gold plating is applied to terminals and circuit surfaces of electronic industrial parts such as printed wiring board circuits, IC packages, ITO boards, and IC cards.
- the nickel-gold substitution reaction occurs immediately after the plating reaction starts. Quickly and strongly attack the grain boundaries of the deposited particles in the electroless nickel coating, the erosion of the deposited particles progresses deeply, and a defective portion is formed under the plated film. In some cases, the defect may be continuous or concentrated, leading to poor appearance of the plated coating (pitting of the surface).
- 2001-107259 discloses a substitution-type electroless plating solution containing hypophosphite or hydrazine and a linear alkylamine.
- the purpose of this substitution-type electroless gold plating solution is to reduce the roughness of the underlying nickel surface and to reduce the decrease in the fixing strength (sea strength) of solder members such as solder poles due to thermal history. It was done.
- Japanese Patent Application Laid-Open No. Hei 6-280039 discloses a non-ionic surfactant in an electroless plating bath containing a water-soluble gold compound, a complexing agent, a reducing agent, and a nitrogen-containing compound such as amine. Disclosed is a plating solution in which a surfactant and Z or a nonionic polymer are added as stabilizers to further prevent the occurrence of plating spread. Disclosure of the invention
- An object of the present invention is to provide an electroless plating solution that can obtain a plating film having no pitting corrosion on the surface and can secure sufficient soldering strength when soldering is performed.
- the present invention is as follows.
- An electroless plating solution comprising a water-soluble gold compound, and a hydroxyalkylsulfonic acid or a salt thereof represented by the following general formula as a reducing agent, and an amine compound. .
- R is any one of hydrogen, a carboxy group, or an optionally substituted phenyl group, a naphthyl group, a saturated or unsaturated alkyl group, an acetyl group, an acetonyl group, a pyridyl group, and a furyl group.
- X represents hydrogen, Na, K, or ⁇ 4, and ⁇ is an integer of 0 to 4.
- the amine compound is triethylenetetramine (H 2 N (CH 2 ) 2 NH (CH 2 ) 2 NH (CH 2 ) 2 NH 2 ).
- the electroless plating solution according to any one of the above.
- FIG. 1 is a SEM photograph of the surface of the gold-plated film of Example 1.
- FIG. 2 is an SEM photograph of the surface of the gold-plated film of Comparative Example 1.
- FIG. 3 is an SEM photograph of the surface of the gold-plated film of Comparative Example 2. BEST MODE FOR CARRYING OUT THE INVENTION
- the gold plating solution of the present invention is not particularly limited as long as the gold compound serving as a gold source is water-soluble, and is most characterized by containing a specific hydroxyalkylsulfonic acid or a salt thereof and an amine compound. .
- the plating solution of the present invention is a solution in which at least a water-soluble gold compound, a specific hydroxyalkylsulfonic acid or a salt thereof, and an amine compound are dissolved in an aqueous solvent, and the solvent is water. preferable.
- the electroless plating solution of the present invention preferably contains these gold compounds in a plating solution in a gold concentration of 0.1 to 100 g / L, more preferably 0.5 to 20 gZL. It contains. If the gold concentration is less than 0.1 g / L, the replacement rate of gold is remarkably slowed, and the effect is saturated even if it exceeds lOOgZL, so that there is no merit.
- a hydroxyalkylsulfonic acid represented by the following general formula or a salt thereof is used as the reducing agent. HO-CH- (CH 2 ) n -S0 3 X
- R is any one of hydrogen, a carboxy group, or an optionally substituted phenyl group, a naphthyl group, a saturated or unsaturated alkyl group, an acetyl group, an acetonyl group, a pyridyl group, and a furyl group.
- X represents hydrogen, Na, K, or ⁇ 4, and ⁇ is an integer of 0 to 4.
- substituents of a phenyl group, a naphthyl group, a saturated or unsaturated alkyl group, an acetyl group, an acetonyl group, a pyridyl group, and a furyl group represented by R include a halogen element, an alkoxy group, and a -toro group.
- the halogen element chlorine is preferable
- the alkoxy group a lower alkoxy group, for example, a methoxy group is preferable.
- the salt of the sulfonic acid group include an alkali metal salt, and a sodium salt is preferable.
- X is preferably sodium.
- hydroxyalkylsulfonic acid represented by the above general formula or a salt thereof include the following compounds, and in particular, the compounds of Nos. 1 and 2 can be preferably used.
- hydroxyalkylsulfonic acid or a salt thereof is preferably contained in the plating solution at 0.1 to 20 g / L, more preferably at 0.5 to 10 g / L. If the content is less than 0.1 gZL, the gold deposition rate will be low, and if it exceeds 20 gZL, the possibility of bath decomposition will increase.
- Examples of the amine compound include compounds having a primary amine and a secondary amine in one molecule such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine, methylamine, ethylamine, propyleneamine, butylenamine, and pentanamine. And diamine compounds such as diaminemethylenediamine, ethylenediamine, propylenediamine, butylenediamine, pentanediamine and hexanediamine.
- aromatic amines such as aromatic amines in which an aromatic ring such as a benzene ring is bonded to the above compound, and furin in which an amino group is directly bonded to the above compounds.
- a compound in which a highly polar substituent such as a hydroxyl group, a hydroxyl group or a sulfonic acid group is bonded to the above compound, or a compound in which a salt such as a hydrochloride is formed may be used. .
- the amine compound preferably contains 0.1 to 30 gZL, more preferably 0.5 to 20 gZL, in the plating solution. If the content is less than 0.1 g / L, grain boundary erosion of the nickel surface proceeds, which may cause poor appearance of the plated film. On the other hand, if the content exceeds 30 gZL, bath decomposition is likely to occur, which is not preferable.
- a phosphate compound may be added as a pH buffering agent.
- Phosphoric acid compounds include phosphoric acid, pyrophosphoric acid, or alkali metals thereof, alkaline earth metals, ammonium salts, alkali metal dihydrogen phosphate, alkaline earth metal dihydrogen phosphate, ammonium dihydrogen phosphate, Examples include dialkali metal hydrogen phosphate, dialkaline earth metal hydrogen phosphate, diammonium hydrogen phosphate, and the like.
- the concentration of the phosphoric acid compound in the plating solution is preferably from 0.1 to 200 gZL, more preferably from 1 to L: 00 g / L.
- the plating solution of the present invention may further contain an aminocarboxylic acid compound as a complexing agent.
- aminocarboxylic acid conjugate examples include ethylenediaminetetraacetic acid (EDTA) and hydroxyethylethylenediamine triamine.
- EDTA ethylenediaminetetraacetic acid
- Examples thereof include triacetate, tritripropionic acid, and alkali metals, alkaline earth metals, and ammonium salts thereof.
- the concentration of the aminocarboxylic acid compound in the plating solution is preferably from 0.1 to 200 g / L, more preferably from 1 to 100 gZL. If the concentration of the aminocarboxylic acid conjugate is less than 0.1 g / L, the effect as a complexing agent is poor, and if it exceeds 200 gZL, the effect is saturated and there is no merit.
- a cyanide compound such as potassium cyanide or sodium cyanide may be added to stabilize the gold complex and improve bath stability. If the addition amount of the cyanide compound is too large, the base coat film is corroded and pitting is easily generated. Therefore, the addition amount is preferably in the range of 0.01 to 5 gZL.
- a terium compound or a lead compound as a reaction accelerator.
- the addition amount of these metals is preferably 0.01 to 5 Omg / L as a metal. If the amount of the reaction accelerator is too large, bath decomposition is caused.
- the pH of the plating solution of the present invention is preferably used in the range of pH 5 to 9, from the viewpoint of the deposition rate of gold, the appearance of the plating film, and bath stability, and particularly preferably in the range of pH 6 to 8.
- alkaline compounds such as potassium hydroxide, sodium hydroxide, and ammonia
- acidic compounds such as sulfuric acid and phosphoric acid
- the plating solution of the present invention at a bath temperature of 60 to 90 ° C. from the viewpoints of bath stability and gold deposition rate.
- a covering material such as a printed wiring board is immersed in a bath. It is preferable that the material to be coated is after a base nickel plating or the like is performed, and when the plating is performed using the plating solution of the present invention, the obtained plating film is obtained. Has no pitting corrosion on the surface, has good adhesion to the underlying nickel plating film, and secures sufficient soldering strength when soldering is performed.
- Each of the plating solutions having the compositions shown in Table 1 was bathed.
- the process up to the use of a copper-clad printed wiring board as the covering material and the electroless gold plating were performed as follows, and the electroless gold plating was performed under the conditions shown in Table 1.
- Electroless Eckel plating (KG-530 made by Nikko Metal Plating) at 85 ° C for 3 minutes
- FIGS. 1 to 3 show SEM photographs of the gold-coated films of Example 1 and Comparative Examples 1 and 2, respectively. Pitting in the picture is observed as black spots. Real No black spots, that is, no pitting, were observed in the plated film of Example 1, but pitting was observed in the plated films of Comparative Examples 1 and 2. Also, no pitting corrosion was observed in the gold-coated film of Example 2 as in Example 1.
- the deposition rate was determined by performing plating for 20 minutes and then measuring the plating film thickness using a fluorescent X-ray film thickness meter SFT-3200 manufactured by Seiko Electronics Co., Ltd.
- Table 1 shows the evaluation results.
- Example 1 The pH was adjusted with a hydroxylating power room. Next, the plating adhesion obtained in Example 1 and Comparative Example 1 was tested for solder adhesion strength.
- the test was performed by a heated bump bull test as described below. The test was performed 12 times, and the maximum, minimum, and average values excluding upper and lower abnormal values are shown in Table 2.
- Reflow furnace Far-infrared reflow soldering equipment
- the electroless plating solution of the present invention When the electroless plating solution of the present invention is used, a plating film having no pitting on the surface can be obtained. Furthermore, when the electroless plating solution of the present invention is applied to the terminals of electronic industrial parts such as printed wiring board circuits, IC cages, ITO substrates, and IC cards and the surface of the circuit, an electroless nickel plating film as a base is obtained. Adhesion with the solder improves, and sufficient soldering strength can be secured when soldering is performed.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2004800160274A CN100510174C (zh) | 2003-06-10 | 2004-03-31 | 化学镀金液 |
KR1020057023540A KR100749992B1 (ko) | 2003-06-10 | 2004-03-31 | 무전해 금도금액 |
JP2005506873A JP4638818B2 (ja) | 2003-06-10 | 2004-03-31 | 無電解金めっき液 |
HK06110514.0A HK1090096A1 (en) | 2003-06-10 | 2006-09-21 | Electroless gold plating solution |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-164807 | 2003-06-10 | ||
JP2003164807 | 2003-06-10 | ||
JP2003416315 | 2003-12-15 | ||
JP2003-416315 | 2003-12-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2004111287A1 WO2004111287A1 (ja) | 2004-12-23 |
WO2004111287A2 true WO2004111287A2 (ja) | 2004-12-23 |
WO2004111287A3 WO2004111287A3 (ja) | 2005-03-03 |
Family
ID=33554380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004656 WO2004111287A2 (ja) | 2003-06-10 | 2004-03-31 | 無電解金めっき液 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP4638818B2 (ja) |
KR (1) | KR100749992B1 (ja) |
CN (1) | CN100510174C (ja) |
HK (1) | HK1090096A1 (ja) |
TW (1) | TWI284157B (ja) |
WO (1) | WO2004111287A2 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7300501B2 (en) * | 2004-04-05 | 2007-11-27 | Nikko Materials Co., Ltd. | Electroless gold plating liquid |
US7985285B2 (en) | 2006-12-06 | 2011-07-26 | C. Uyemura & Co., Ltd. | Electroless gold plating bath, electroless gold plating method and electronic parts |
US7988773B2 (en) | 2006-12-06 | 2011-08-02 | C. Uyemura & Co., Ltd. | Electroless gold plating bath, electroless gold plating method and electronic parts |
US8771409B2 (en) | 2010-07-20 | 2014-07-08 | Electroplating Engineers Of Japan Limited | Electroless gold plating solution and electroless gold plating method |
JP2017222891A (ja) * | 2016-06-13 | 2017-12-21 | 上村工業株式会社 | 皮膜形成方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4941650B2 (ja) * | 2007-01-11 | 2012-05-30 | 上村工業株式会社 | 無電解金めっき浴のめっき能維持管理方法 |
JP5013077B2 (ja) * | 2007-04-16 | 2012-08-29 | 上村工業株式会社 | 無電解金めっき方法及び電子部品 |
JP6619563B2 (ja) * | 2015-04-30 | 2019-12-11 | 日本高純度化学株式会社 | 無電解金めっき液、アルデヒド−アミン付加体補給液及びそれらを用いて形成した金皮膜 |
CN105543816A (zh) * | 2016-02-01 | 2016-05-04 | 哈尔滨工业大学(威海) | 一种化学镀金液 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000026977A (ja) * | 1998-07-13 | 2000-01-25 | Daiwa Kasei Kenkyusho:Kk | 貴金属を化学的還元析出によって得るための水溶液 |
JP2000219973A (ja) * | 1999-01-27 | 2000-08-08 | Shipley Co Llc | 無電解金メッキ溶液および方法 |
JP2003013248A (ja) * | 2001-07-02 | 2003-01-15 | Learonal Japan Inc | 無電解金めっき液および無電解金めっき方法 |
JP2003041378A (ja) * | 2001-07-27 | 2003-02-13 | Japan Pure Chemical Co Ltd | 無電解金メッキ液 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2667323B2 (ja) * | 1991-04-01 | 1997-10-27 | 川崎製鉄株式会社 | 酸化防止剤、めっき浴用助剤およびこれを用いためっき浴 |
-
2004
- 2004-03-31 WO PCT/JP2004/004656 patent/WO2004111287A2/ja active Application Filing
- 2004-03-31 CN CNB2004800160274A patent/CN100510174C/zh not_active Expired - Lifetime
- 2004-03-31 JP JP2005506873A patent/JP4638818B2/ja not_active Expired - Lifetime
- 2004-03-31 KR KR1020057023540A patent/KR100749992B1/ko active IP Right Grant
- 2004-04-08 TW TW093109714A patent/TWI284157B/zh not_active IP Right Cessation
-
2006
- 2006-09-21 HK HK06110514.0A patent/HK1090096A1/xx not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000026977A (ja) * | 1998-07-13 | 2000-01-25 | Daiwa Kasei Kenkyusho:Kk | 貴金属を化学的還元析出によって得るための水溶液 |
JP2000219973A (ja) * | 1999-01-27 | 2000-08-08 | Shipley Co Llc | 無電解金メッキ溶液および方法 |
JP2003013248A (ja) * | 2001-07-02 | 2003-01-15 | Learonal Japan Inc | 無電解金めっき液および無電解金めっき方法 |
JP2003041378A (ja) * | 2001-07-27 | 2003-02-13 | Japan Pure Chemical Co Ltd | 無電解金メッキ液 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7300501B2 (en) * | 2004-04-05 | 2007-11-27 | Nikko Materials Co., Ltd. | Electroless gold plating liquid |
US7985285B2 (en) | 2006-12-06 | 2011-07-26 | C. Uyemura & Co., Ltd. | Electroless gold plating bath, electroless gold plating method and electronic parts |
US7988773B2 (en) | 2006-12-06 | 2011-08-02 | C. Uyemura & Co., Ltd. | Electroless gold plating bath, electroless gold plating method and electronic parts |
US8771409B2 (en) | 2010-07-20 | 2014-07-08 | Electroplating Engineers Of Japan Limited | Electroless gold plating solution and electroless gold plating method |
JP2017222891A (ja) * | 2016-06-13 | 2017-12-21 | 上村工業株式会社 | 皮膜形成方法 |
US10941493B2 (en) | 2016-06-13 | 2021-03-09 | C. Uyemura & Co., Ltd. | Film formation method |
Also Published As
Publication number | Publication date |
---|---|
WO2004111287A3 (ja) | 2005-03-03 |
CN100510174C (zh) | 2009-07-08 |
HK1090096A1 (en) | 2006-12-15 |
JP4638818B2 (ja) | 2011-02-23 |
TWI284157B (en) | 2007-07-21 |
KR100749992B1 (ko) | 2007-08-16 |
KR20060031617A (ko) | 2006-04-12 |
JPWO2004111287A1 (ja) | 2006-07-20 |
TW200500496A (en) | 2005-01-01 |
CN1802452A (zh) | 2006-07-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8124174B2 (en) | Electroless gold plating method and electronic parts | |
KR100442405B1 (ko) | 은도금법 | |
CN101228293B (zh) | 化学镀钯液 | |
JP4116718B2 (ja) | 無電解金めっき方法及びそれに使用する無電解金めっき液 | |
TW200902758A (en) | Electroless gold plating bath, electroless gold plating method and electronic parts | |
JP2008144187A (ja) | 無電解金めっき浴、無電解金めっき方法及び電子部品 | |
JP2008184679A (ja) | 無電解パラジウムめっき用活性化組成物 | |
JP4105205B2 (ja) | 無電解金めっき液 | |
WO2004111287A2 (ja) | 無電解金めっき液 | |
JP4375702B2 (ja) | めっき組成物 | |
US7390354B2 (en) | Electroless gold plating solution | |
KR20180044923A (ko) | 금의 무전해 도금을 위한 도금욕 조성물 및 금 층을 침착시키는 방법 | |
JP4831710B1 (ja) | 無電解金めっき液及び無電解金めっき方法 | |
US7419536B2 (en) | Electroless gold plating liquid | |
JP2649750B2 (ja) | 銅系素材上への選択的無電解めっき方法 | |
JP5216372B2 (ja) | 無電解錫めっき浴及び無電解錫めっき方法 | |
TWI804539B (zh) | 無電鍍金鍍浴 | |
WO2004038063A1 (ja) | 置換型無電解金めっき液 | |
JP2008214703A (ja) | 無電解金めっき液 | |
JPH06101054A (ja) | 銅系素材選択型無電解めっき用触媒液 | |
CN116508401A (zh) | 无电解金镀覆液 | |
TW202043546A (zh) | 無電解鍍金浴 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005506873 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020057023540 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20048160274 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057023540 Country of ref document: KR |
|
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
122 | Ep: pct application non-entry in european phase |