WO2003078698A1 - Procede de depot d'une couche de cuivre par galvanoplastie, anode contenant du phosphore destinee au depot d'une couche de cuivre par galvanoplastie, et plaquette semi-conductrice sur laquelle adherent peu de particules obtenue a partir de ce procede et de cette anode - Google Patents
Procede de depot d'une couche de cuivre par galvanoplastie, anode contenant du phosphore destinee au depot d'une couche de cuivre par galvanoplastie, et plaquette semi-conductrice sur laquelle adherent peu de particules obtenue a partir de ce procede et de cette anode Download PDFInfo
- Publication number
- WO2003078698A1 WO2003078698A1 PCT/JP2002/012437 JP0212437W WO03078698A1 WO 2003078698 A1 WO2003078698 A1 WO 2003078698A1 JP 0212437 W JP0212437 W JP 0212437W WO 03078698 A1 WO03078698 A1 WO 03078698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copper
- phosphorus
- plating
- anode
- semiconductor wafer
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/12—Semiconductors
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/12—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
Definitions
- the present invention provides an electrolytic copper plating method for preventing particles from adhering to an object to be adhered, particularly a semiconductor wafer, during electrolytic copper plating, a phosphorous copper-containing anode for electrolytic copper plating, and an electric device using the same.
- the present invention relates to a semiconductor wafer with little particles attached to copper. Background art
- electrolytic copper plating is used for forming copper wiring in PWBs (printed wiring boards) and the like, but recently it has been used for forming copper wiring of semiconductors.
- Electroplated copper has a long history and has accumulated a great deal of technology, but it has not been a problem in the case of using this copper plated metal for forming copper wiring of semiconductors. A new inconvenience has emerged.
- phosphorus-containing copper is used as the anode.
- an insoluble anode made of platinum, titanium, iridium oxide, or the like the additive in the plating solution is affected by the anodic oxidation, resulting in poor plating, which results in poor plating.
- electrolytic copper or oxygen-free copper a large amount of particles such as metallic copper or copper oxide sludge generated by Hffi's disproportionation of copper during melting generates a large amount of particles. This is because it is contaminated.
- a phosphorus-containing copper anode was used: ⁇ , a black film made of phosphorous copper, copper chloride, etc. was formed on the anode surface by electrolysis, and metal copper or copper oxide formed by the disproportionation reaction of copper Can be suppressed, and generation of particles can be suppressed.
- the formation of particles is completely suppressed because the black film falls off and metallic copper and copper oxide are formed in the thin portion of the black film. Do not mean.
- the anode is wrapped in a filter cloth, usually called an anode bag, to prevent particles from reaching the plating solution.
- the present invention provides an electrolytic copper plating method for preventing the adhesion of particles to an object to be adhered, particularly a semiconductor layer, when performing electrolytic copper plating, a phosphorus-containing copper anode for electrolytic copper plating, and a method for producing the same. It is an object of the present invention to provide a semiconductor wafer with a small amount of particles adhered by using electrolytic copper.
- the present inventors performed a gem if ⁇ , and as a result, by improving the material of the electrode, the copper plating on the semiconductor wafer or the like with less adhesion of the particles was achieved. It was found that it was possible to stably carry out.
- the present invention is based on this finding,
- An electrolytic copper plating method using a phosphorus-containing copper anode comprising using a phosphorus-containing copper anode having a crystal of 150 Om (super) to 20000 00 ;
- the present invention also provides:
- a phosphorus-containing copper anode for performing electrolytic copper plating wherein the crystal of the phosphorus-containing copper anode is 1500 m (exceeding) to 20000 m. 5.
- FIG. 1 is a conceptual diagram of an apparatus used in the method for copper electroplating of a semiconductor wafer according to the present invention.
- Embodiment of the Invention is a conceptual diagram of an apparatus used in the method for copper electroplating of a semiconductor wafer according to the present invention.
- Fig. 1 shows an example of the equipment used for the method of copper electroplating of semiconductor wafers.
- This copper plating apparatus includes a plating tank 1 having a copper sulfate plating solution 2.
- An anode 4 made of a copper alloy containing copper is used as the anode, and a semiconductor wafer, for example, for attaching to the power source is used.
- the formation rate of the black film is strongly affected by the current density of the anode, the crystal grain size, the phosphorus content, etc., and the higher the current density, the smaller the crystal grain size, and the higher the phosphorus content
- the black film tends to be thicker.
- black film has the function of suppressing the generation of particles such as metallic copper and copper oxide. A big problem arises. Conversely, if it is too thin, there is a problem that the effect of suppressing the production of metallic copper, copper oxide, and the like is reduced.
- the present inventors have conducted an electrolytic copper plating method using a phosphorus-containing copper anode whose crystal grain size has been adjusted to 10 to 150 / xm beforehand (Japanese Patent Application No. 2000-200). 1—3 2 3 2 6 5).
- This method is effective for suppressing the generation of sludge generated on the anode side in the plating solution.
- the upper limit of the crystal grain size of the anode is set to 1500 zm, and the assumption is that sludge tends to increase when the phosphorous copper anode has a crystal grain size exceeding this limit.
- the present invention proposes a phosphorous copper anode exhibiting a more optimal value.
- a phosphorus-containing copper anode of the present invention a phosphorus-containing copper anode having a crystal grain size of 1500 / im (super) to 20000 is used.
- the upper limit was set to 20000 m.
- the phosphorus content of the phosphorus-containing copper anode is 50 to 200 ppm, preferably 100 to: L0000 ppm.
- the sludge generated on the fine particle size side contains a large amount of copper chloride and copper phosphide, which are also the main components of the black film.
- the main component of the sludge generated on the particle size side is changed to metallic copper.
- Copper chloride / copper phosphide has a high specific gravity and easily floats in liquid, but metallic copper has a high specific gravity and does not easily float in liquid. For this reason, it is considered that the reversal phenomenon that the number of particles attached to the semiconductor layer 8 decreases despite the large amount of sludge generated on the coarse particle size side is occurring.
- the copper electroplating using the coarse copper particle (150 O ⁇ m (extra) to 2000 Om) containing phosphorous copper node of the present invention is particularly useful for plating on semiconductors. I understood.
- Such electrolytic copper plating using a phosphorus-containing copper anode is effective as a method for reducing the defective plating rate caused by particles even in copper plating in other fields in which thinning is progressing.
- the phosphorus-containing copper anode of the present invention has an effect of remarkably reducing the contamination of the adherend due to the large number of particles, but the plating has been conventionally caused by using an insoluble anode. There is an advantage that decomposition of the additive in the liquid and poor adhesion due to the decomposition do not occur.
- copper sulfate 10 to 70 g / L (Cu)
- sulfuric acid 10 to 300 g / L
- additive (Nikko Metal Printing CC-1220: lmL / L etc.)
- the sulfur content be 99.9% or more.
- the plating bath temperature is 15 to 35 ° C
- the cathode current density is 0.5 to 1 OA / dm 2
- the anode current density is 0.5 to 1 OA / dm 2 .
- the preferred examples of the plating conditions are described above, but the plating conditions need not necessarily be limited to the above conditions. Examples and comparative examples
- phosphorus-containing copper with a phosphorus content of 50 Owt ppm was used as the anode, and a half wafer was used for Oki. Crystals of these phosphorus-containing copper anodes; ⁇ 3 ⁇ 4 ⁇ ⁇ were 1800, 5000 m and 18000 xm.
- copper sulfate 20g / L (Cu)
- sulfuric acid 20 Og / L
- ion 60mgZL additive [brightener, surfactant] (Nikko Metal Plating: CC-1220): lmL / L was used.
- the value of sulfur in the plating solution was 99.99%.
- the plating conditions were a plating bath temperature of 30 ° C., a cathode current density of 3. OA / dm 2 , an anode current density of 3. OA / dm 2 , and a plating time of 120 hr.
- Table 1 shows the above conditions.
- Table 1 also shows the results. After the electrolysis was performed under the above electrolysis conditions, the semiconductor wafer was replaced, lmm plating was performed, and particles of 0.2 m or more adhering to the semiconductor wafer (8 inches) were counted. Measured by one.
- the semiconductor wafer was replaced, the lmin was plated, and the plating was visually observed for burnt, cloudy, blistering, abnormal deposition, foreign matter adhesion, etc. .
- a cross section of the via embedding property of a semiconductor wafer with an aspect ratio of 5 (via diameter 0.2 m) was observed with an electron microscope.
- the number of particles was 3, 4, and 7, respectively, which were extremely small, and the plating appearance and the embedding property were good.
- the appearance of the plating was determined by performing electrolysis under the following electrolysis conditions, replacing the semiconductor wafer, plating for 1 min, and visually observing the presence of burnt, cloudy, blistering, abnormal deposition, etc.
- the cross-sectional observation of the via-fillability of a 0.2 m ) semiconductor wafer with an electron microscope was performed.
- phosphorus-containing copper with a phosphorus content of 50 Owtppm was used as the anode, and a half wafer was used as the jig.
- the crystal grain sizes of these phosphorus-containing copper anodes were 3 zm, 800 / m and 30,000 m.
- copper sulfate 20 gZL (Cu)
- sulfuric acid 200 gZL
- additive [brightening agent, surfactant] manufactured by Nikko Metal Plating Co., Ltd .: Product name CC-1 1220
- lmL / L was used.
- the purity of copper sulfate in the plating solution was 99.99%.
- the plating conditions were, as in Examples 1-3, a plating bath temperature of 30 °, a cathode current density of 3.OA / dm 2 , an anode current density of 3.OA / dm 2 and a plating time of 120 hr. Table 2 shows the above conditions.
- CC-1220 1 ml_ / L
- CC-1220 1 mL / L
- CC-1220 1 mL / L
- Electrolysis conditions Cathode current density (A / dm 2 ) 3.0 3.0 3.0
- the number of particles was determined by performing electrolysis under the above electrolysis conditions, replacing the semiconductor wafer, plating for 1 min, and measuring particles of 0.2 m or more attached to the semiconductor wafer (8 inches) with a particle counter.
- the semiconductor wafer was replaced and plated for 1 min and visually inspected for burns, detonation, blistering, abnormal deposition, etc.
- Cross-sectional observation of the via-embedding property of a semiconductor wafer with a diameter of 0.2 fl m) was performed with an electron microscope.
- the present invention has an excellent feature that when performing copper electroplating, it is possible to stably perform copper electroplating on a semiconductor wafer or the like with little particle adhesion.
- the electrolytic copper plating of the present invention using such a phosphorous copper-containing anode is effective as a method for reducing the defective plating rate caused by particles even in copper plating in other fields in which thinning is progressing. is there.
- the phosphorus-containing copper anode of the present invention has an effect of remarkably reducing the adhesion and contamination of particles to an object to be coated, but the addition to the plating solution caused by the use of an insoluble anode. It has the effect of preventing the generation of the adhesive and the resulting poor adhesion.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrodes Of Semiconductors (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02788678A EP1489203A4 (en) | 2002-03-18 | 2002-11-28 | PROCESS FOR GALVANIC COPPER, PHOSPHOROUS ANODE FOR GLAVANIC COPPERING AND USE OF COPPER SEMICONDUCTOR WAFERS WITH LITTLE PARTICULAR MATERIALS THEREOF |
US10/478,750 US7374651B2 (en) | 2002-03-18 | 2002-11-28 | Electrolytic copper plating method, phosphorus-containing anode for electrolytic copper plating, and semiconductor wafer plated using them and having few particles adhering to it |
KR1020047014331A KR100682270B1 (ko) | 2002-03-18 | 2002-11-28 | 전기동 도금방법, 전기동 도금용 함인동 애노드 및 이들을사용하여 도금한 파티클 부착이 적은 반도체 웨이퍼 |
US12/041,095 US8252157B2 (en) | 2002-03-18 | 2008-03-03 | Electrolytic copper plating method, phosphorous copper anode for electrolytic copper plating, and semiconductor wafer having low particle adhesion plated with said method and anode |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-74659 | 2002-03-18 | ||
JP2002074659A JP4034095B2 (ja) | 2002-03-18 | 2002-03-18 | 電気銅めっき方法及び電気銅めっき用含リン銅アノード |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10478750 A-371-Of-International | 2002-11-28 | ||
US12/041,095 Continuation US8252157B2 (en) | 2002-03-18 | 2008-03-03 | Electrolytic copper plating method, phosphorous copper anode for electrolytic copper plating, and semiconductor wafer having low particle adhesion plated with said method and anode |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003078698A1 true WO2003078698A1 (fr) | 2003-09-25 |
Family
ID=28035319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/012437 WO2003078698A1 (fr) | 2002-03-18 | 2002-11-28 | Procede de depot d'une couche de cuivre par galvanoplastie, anode contenant du phosphore destinee au depot d'une couche de cuivre par galvanoplastie, et plaquette semi-conductrice sur laquelle adherent peu de particules obtenue a partir de ce procede et de cette anode |
Country Status (7)
Country | Link |
---|---|
US (2) | US7374651B2 (ja) |
EP (1) | EP1489203A4 (ja) |
JP (1) | JP4034095B2 (ja) |
KR (1) | KR100682270B1 (ja) |
CN (1) | CN1268790C (ja) |
TW (1) | TWI227753B (ja) |
WO (1) | WO2003078698A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2450474A1 (en) * | 2001-08-01 | 2012-05-09 | JX Nippon Mining & Metals Corporation | High purity nickel, sputtering target comprising the high purity nickel, and thin film formed by using said sputtering target |
JP4076751B2 (ja) * | 2001-10-22 | 2008-04-16 | 日鉱金属株式会社 | 電気銅めっき方法、電気銅めっき用含リン銅アノード及びこれらを用いてめっきされたパーティクル付着の少ない半導体ウエハ |
JP4011336B2 (ja) * | 2001-12-07 | 2007-11-21 | 日鉱金属株式会社 | 電気銅めっき方法、電気銅めっき用純銅アノード及びこれらを用いてめっきされたパーティクル付着の少ない半導体ウエハ |
JP3987069B2 (ja) * | 2002-09-05 | 2007-10-03 | 日鉱金属株式会社 | 高純度硫酸銅及びその製造方法 |
US6982030B2 (en) * | 2002-11-27 | 2006-01-03 | Technic, Inc. | Reduction of surface oxidation during electroplating |
US20060240276A1 (en) * | 2005-04-20 | 2006-10-26 | Technic, Inc. | Underlayer for reducing surface oxidation of plated deposits |
JP5119582B2 (ja) | 2005-09-16 | 2013-01-16 | 住友電気工業株式会社 | 超電導線材の製造方法および超電導機器 |
JP2007262456A (ja) * | 2006-03-27 | 2007-10-11 | Hitachi Cable Ltd | 銅めっきの陽電極用銅ボール、めっき装置、銅めっき方法、及びプリント基板の製造方法 |
KR101945043B1 (ko) * | 2007-11-01 | 2019-02-01 | 제이엑스금속주식회사 | 구리 애노드 또는 인 함유 구리 애노드, 반도체 웨이퍼에 대한 전기 구리 도금 방법 및 파티클 부착이 적은 반도체 웨이퍼 |
CN102485924B (zh) * | 2010-12-06 | 2013-12-11 | 有研亿金新材料股份有限公司 | 一种集成电路用磷铜阳极的制备方法 |
JP5590328B2 (ja) * | 2011-01-14 | 2014-09-17 | 三菱マテリアル株式会社 | 電気銅めっき用含リン銅アノードおよびそれを用いた電解銅めっき方法 |
JP5626582B2 (ja) * | 2011-01-21 | 2014-11-19 | 三菱マテリアル株式会社 | 電気銅めっき用含リン銅アノードおよびそれを用いた電気銅めっき方法 |
CN105586630A (zh) * | 2015-12-23 | 2016-05-18 | 南通富士通微电子股份有限公司 | 半导体封装中提升铜磷阳极黑膜品质的方法 |
CN107641821B (zh) * | 2017-09-14 | 2019-06-07 | 上海新阳半导体材料股份有限公司 | 一种硫酸铜电镀液、其制备方法和应用及电解槽 |
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2002
- 2002-03-18 JP JP2002074659A patent/JP4034095B2/ja not_active Expired - Lifetime
- 2002-11-28 US US10/478,750 patent/US7374651B2/en not_active Expired - Lifetime
- 2002-11-28 CN CNB028102045A patent/CN1268790C/zh not_active Expired - Lifetime
- 2002-11-28 WO PCT/JP2002/012437 patent/WO2003078698A1/ja active Application Filing
- 2002-11-28 KR KR1020047014331A patent/KR100682270B1/ko active IP Right Grant
- 2002-11-28 EP EP02788678A patent/EP1489203A4/en not_active Withdrawn
-
2003
- 2003-02-11 TW TW092102739A patent/TWI227753B/zh not_active IP Right Cessation
-
2008
- 2008-03-03 US US12/041,095 patent/US8252157B2/en not_active Expired - Lifetime
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JP2001323265A (ja) | 2000-05-12 | 2001-11-22 | Jiro Fujimasu | 粘性土等の安定固化組成物 |
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Also Published As
Publication number | Publication date |
---|---|
JP2003268595A (ja) | 2003-09-25 |
US7374651B2 (en) | 2008-05-20 |
US20040149588A1 (en) | 2004-08-05 |
CN1509351A (zh) | 2004-06-30 |
TWI227753B (en) | 2005-02-11 |
TW200304504A (en) | 2003-10-01 |
EP1489203A1 (en) | 2004-12-22 |
US20080210568A1 (en) | 2008-09-04 |
KR20040093133A (ko) | 2004-11-04 |
US8252157B2 (en) | 2012-08-28 |
KR100682270B1 (ko) | 2007-02-15 |
JP4034095B2 (ja) | 2008-01-16 |
EP1489203A4 (en) | 2006-04-05 |
CN1268790C (zh) | 2006-08-09 |
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