WO2009108019A2 - 알에프 장비의 도금 방법 및 이에 의해 제조된 알에프 장비 - Google Patents
알에프 장비의 도금 방법 및 이에 의해 제조된 알에프 장비 Download PDFInfo
- Publication number
- WO2009108019A2 WO2009108019A2 PCT/KR2009/000974 KR2009000974W WO2009108019A2 WO 2009108019 A2 WO2009108019 A2 WO 2009108019A2 KR 2009000974 W KR2009000974 W KR 2009000974W WO 2009108019 A2 WO2009108019 A2 WO 2009108019A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plating
- equipment
- copper
- thin film
- layer
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
- C25D5/611—Smooth layers
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
Definitions
- the present invention relates to a plating method, and more particularly, to a plating method of RF equipment and RF equipment manufactured thereby.
- RF equipment that processes high frequency RF signals should be able to reduce AC losses in order to achieve the desired characteristics in the desired frequency range.
- a plating process for plating the inside of the RF equipment is adopted, and silver plating is generally performed.
- the factors affecting the AC loss of high frequency RF equipment are the surface roughness and plating method of the inner surface of the waveguide, and in order to reduce the loss, a plating method suitable for a complicated shape product should be used and an appropriate plating solution should be selected. There is a need.
- the plating thickness of the plated layer also has an important relationship with the physical properties, namely the skin effect in the high frequency region, the skin depth (Skin Depth) according to the skin effect is expressed by the following equation (1).
- Equation 1 ⁇ is a constant, ⁇ is a permeability, f is a frequency, and ⁇ is a conductivity.
- RF equipment that is silver plated is mainly made of aluminum and aluminum alloy, and then silver plated.
- RF equipment is manufactured by manufacturing a shape of aluminum or an aluminum alloy through a mold and then depositing the same in a plating solution.
- Silver plating of such an RF device has excellent characteristics in loss and appearance quality, but has a problem in that it is costly and there is no economic advantage.
- the present invention is to propose a plating method of the RF equipment that can be plated at a low cost and the RF equipment manufactured thereby.
- Another object of the present invention is to propose a plating method of an RF device and an RF device manufactured thereby, which can have excellent appearance quality while being plated at low cost.
- the plated material may include aluminum and an aluminum alloy.
- the thickness of the copper plating layer may be set to more than the skin depth of the frequency band used.
- the noble metal thin film layer may have a thickness of about 0.2 ⁇ m to about 1 ⁇ m.
- the precious metal may be any one selected from the group consisting of silver, gold, platinum or a combination thereof.
- the precious metal thin film layer is preferably formed by an electroplating method at a low voltage.
- the precious metal thin film layer may be formed by any one selected from the group consisting of wet plating, sputtering, arc ion plating, dry plating using vacuum ion deposition, and painting including printing.
- the copper plating in step (b) is preferably performed using alkaline pyrophosphate or copper lactate containing Cu (BF 4 ) 2 , CuSO 4 .
- step (b) The copper plating of step (b) is preferably performed using an additional auxiliary electrode.
- the ratio of the current by the main power supply for the main electrode and the current by the auxiliary power supply for the auxiliary electrode is preferably set to 1: 2.
- an RF device which is plated by the above-described methods.
- the present invention has the advantage that it can have an excellent appearance quality while the plating treatment is made at a low cost.
- Figure 1 (a) and (b) is a view showing a plating layer of a conventional RF equipment.
- FIG. 2 is a view showing a plating layer by a plating method according to an embodiment of the present invention.
- FIG. 3 is a flow chart showing the overall flow of the RF equipment plating method according to an embodiment of the present invention.
- Figure 4 is a flow chart showing the flow of pretreatment work according to an embodiment of the present invention.
- FIG. 1 (a) and (b) are diagrams showing a plating layer of a conventional RF device.
- FIG. 1 (a) is a view showing a plating layer of the RF equipment consisting of only silver plating, (b) is a view showing a plating layer of the RF equipment when the base plating and silver plating together.
- Copper was mainly used as the base plating material, and the base plating was mainly performed to improve the adhesion of the plating, and copper used as the base plating material did not affect the RF characteristics.
- plating is performed to have a thickness of 5 ⁇ m to 8 ⁇ m mainly in the 800 MHz band, and when copper base plating and silver plating are performed together, the thickness of copper plating and The plating of the silver plating was performed to have a thickness of about 3 ⁇ m.
- This plating thickness was set in consideration of the fact that the skin depth (Skin Depth) of the silver in the 800MHz band is about 2.27 ⁇ m.
- silver plating is performed on the RF equipment made of aluminum or aluminum alloy, or the silver plating treatment is performed so that the base plating and the silver plating are performed together to improve the adhesion of the plating, and the RF characteristics are determined only by the silver.
- copper plating has a problem that reliability is not secured in appearance quality related to aesthetics, oxidation degree, and antifouling properties. That is, RF equipment plated with copper has a problem in that oxidation and contamination are easily performed without providing aesthetics in appearance.
- FIG. 2 is a view showing a plating layer by a plating method according to an embodiment of the present invention.
- the plating layer may include a material to be plated layer 200, a copper plating layer 202, and a thin film precious metal layer 204.
- the material to be plated may generally be aluminum or an aluminum alloy.
- the copper plating layer 202 plated on the material layer 200 to be plated may have a thickness of about 8 ⁇ m to about 10 ⁇ m in the about 800 MHz band.
- the copper plating layer 202 may be formed by a general electroplating method.
- the thickness of the copper plating layer 202 is set thicker than the skin depth of the use frequency band.
- the precious metal layer 204 is thinly coated on the copper plating 202 to have a thickness of 0.2 ⁇ m to 1 ⁇ m.
- the thickness of the thin film noble metal layer 204 is set considerably thinner than the skin depth of the frequency band used.
- the metal used for the noble metal layer may include a noble metal such as silver, gold, platinum, and preferably silver may be used.
- the thin film noble metal layer 204 does not participate in RF characteristics and only functions to maintain appearance quality. Since the thickness of the thin film noble metal layer 204 is set to be thinner than the skin depth of the frequency band used, it cannot affect RF characteristics such as loss and only affects the appearance quality such as aesthetics, oxidization and antifouling properties.
- RF characteristics such as skin effect and loss are determined by the copper forming the copper plating layer 202, and the thickness of the copper plating layer 202 is set in consideration of the skin depth.
- Precious metals such as silver, gold, and platinum may have better properties than copper in terms of oxidizing and antifouling properties, and because they are also good in appearance, they are easily oxidized or contaminated in an exposed environment compared to conventional plating methods in which copper is plated only. The problem can be prevented.
- the present invention is to ensure the desired RF characteristics by the copper plating layer 202 as in general copper plating, but the thin film precious metal layer 204 to compensate for the reliability of the appearance quality, which is a disadvantage of copper plating.
- the thin film noble metal layer 204 is formed thin, only a very small amount of precious metal is used, and thus it does not require a large cost, thereby maintaining the advantages of low cost copper plating and improving the appearance quality.
- Plating method according to the present invention can be applied to various kinds of RF equipment, such as RF filter, TMA (Tower Mounted Amplifier), waveguide, duplexer, diplexer, bias, etc., the following detailed process of the plating method according to the present invention Explain.
- RF equipment such as RF filter, TMA (Tower Mounted Amplifier), waveguide, duplexer, diplexer, bias, etc.
- FIG. 3 is a flow chart showing the overall flow of the RF equipment plating method according to an embodiment of the present invention.
- a preprocessing operation is performed (step 300).
- the pretreatment operation is to remove foreign substances from the material to be plated and to make the plating target surface uniform so that proper plating can be performed.
- FIG. 4 is a flowchart illustrating a flow of a pretreatment operation according to an embodiment of the present invention.
- T.C.E cleaning operation is performed (step 400).
- T.C.E detailed work is carried out to remove cutting oil, molding foreign material and fingerprints.
- a degreasing operation is performed (step 402).
- Degreasing is a process for removing foreign matter or organic matter attached to the material to be plated. If foreign matter adheres to the surface of the material to be plated, it causes a poor plating adhesion and a non-uniform plating layer is formed, thereby removing the process.
- the degreasing operation includes an ultrasonic degreasing operation and an alkali degreasing operation, and both degreasing operations or any one selected operation can be performed.
- the primary desmuting operation is performed (step 404).
- the desmuting operation is to remove the oxide film generated on the surface of the plated material and to improve plating adhesion by neutralizing the alkalized material with a strong acid.
- the desmuting operation can be performed several times as needed.
- a primary gating process for the material to be plated is performed (step 406).
- the quenching treatment is a method of plating to directly electrolytic or electroless plating on a metal or metal alloy.
- the primary quenching treatment is 100% of gongs having a pH of 0.5 to 1.5. It may be carried out in the Kate liquid for 20 to 30 seconds.
- the secondary dismute process is performed (step 408).
- the secondary jyere process is performed (step 410), and the secondary jyere process may be performed for 20 to 30 seconds in 100% quenching liquid having PH 12 to 13.
- Copper plating is an electroplating operation. Electroplating is performed by placing an electrode in a solution containing metal ions and conducting a current to cause metal ions to discharge from the cathode and to be deposited on the surface of the object to be plated. It is a plating operation to form a thin film of metal.
- Copper plating may be performed in various ways as plating methods already known. According to a preferred embodiment of the present invention, copper plating using copper pyrophosphate or copper lactate (eg, Cu (BF 4 ) 2 , CuSO 4 ) may be performed as the plating agent. Since the thin film noble metal layer is formed on the upper portion of the copper plating layer in the present invention, it is preferable that copper plating having good roughness and smoothness is performed. Therefore, it is preferable to perform copper plating using copper pyrophosphate or copper lactate, rather than cyanide copper which has advantages in plating adhesion and speed. When copper pyrophosphate is used, the pH of copper pyrophosphate may be set to 8.0 to 9.5.
- the copper plating using the auxiliary electrode in addition to the main electrode when the copper plating is preferably performed is preferably performed.
- an auxiliary electrode anode is used during copper plating.
- the ratio of the current generated at the main electrode by the main power supply and the current generated at the auxiliary electrode by the auxiliary power supply is preferably set to 1: 2.
- the copper is plated to secure the RF characteristics of the RF equipment, and the plating is performed to have a sufficient thickness above the skin depth in the frequency band used.
- silver strike plating for plating nucleation is performed after washing with water (step 306), and silver plating for forming a silver plating layer of a thin film for maintaining appearance quality is performed after silver strike plating (step 308).
- silver is used as a thin film plating material for appearance quality, but it has already been described that precious metals such as gold and platinum may be used in addition to silver.
- the silver plating may be performed by electroplating on the potassium cyanide solution and the silver cyanide solution, and may be performed in a short time of about 5 minutes since the plating forms a thin film of 1 ⁇ m or less.
- the plating is preferably performed at a relatively low voltage so that the thin film plating layer has a high density of properties.
- the thin film plating layer thus formed has a very thin thickness, it contributes only to improving the appearance quality without affecting the RF characteristics, and the conventional copper plating in that the RF characteristics are determined by the copper plating layer under the thin film plating layer. It is different from the silver plating method used as the base plating.
- the thin film plating layer by the noble metal may be performed in various ways in addition to the above-described electroplating method.
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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)
- Electroplating Methods And Accessories (AREA)
Abstract
Description
Claims (11)
- 피도금 소재로 이루어진 RF 장비를 전처리하는 단계(a);상기 RF 장비에 대한 구리 도금을 수행하여 구리 도금층을 형성하는 단계(b);상기 구리 도금층 위에 귀금속으로 이루어진 박막층을 형성하는 단계(c)를 포함하되,상기 귀금속 박막층의 두께는 사용 주파수 대역의 표피 깊이(Skin Depth)보다 얇은 것을 특징으로 하는 RF 장비의 도금 방법.
- 제 1 항에 있어서,상기 피도금 소재는 알루미늄 및 알루미늄 합금을 포함하는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 구리 도금층의 두께는 사용 주파수 대역의 표피 깊이 이상으로 설정되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 귀금속 박막층의 두께는 0.2㎛ 내지 1㎛인 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 귀금속은 은, 금, 백금으로부터 이루어진 그룹으로부터 선택된 어느 하나 또는 이들의 조합인 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 귀금속 박막층은 낮은 전압에서의 전기 도금 방식에 의해 형성되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 귀금속 박막층은 습식 도금법, 스퍼터링, 아크 이온 플레이팅, 진공 이온 증착을 이용한 건식 도금법, 프린팅을 포함하는 페인팅 법으로 이루어진 그룹으로부터 선택된 어느 하나에 의해 형성되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항에 있어서,상기 단계 (b)의 구리 도금은 알칼리성의 피로인산 구리 또는 Cu(BF4)2, CuSO4를 포함하는 유산동을 이용하여 수행되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제8항에 있어서,상기 단계 (b)의 구리 도금은 추가적인 보조 전극을 이용하여 수행되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제9항에 있어서,상기 단계(b)의 구리 도금 시 주 전극을 위한 주전원에 의한 전류와 상기 보조 전극을 위한 보조 전원에 의한 전류의 비는 1:2로 설정되는 것을 특징으로 하는 RF 장비의 도금 방법.
- 제1항 내지 제10항중 어느 한 항의 방법에 의해 도금 처리되는 RF 장비.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09715938.8A EP2261399B1 (en) | 2008-02-28 | 2009-02-27 | Method for plating rf equipment and rf equipment manufactured therefrom |
CN2009801070117A CN101960055B (zh) | 2008-02-28 | 2009-02-27 | Rf装置的镀覆方法以及用该方法制造的rf装置 |
US12/919,603 US8859049B2 (en) | 2008-02-28 | 2009-02-27 | Plating method for a radio frequency device and a radio frequency device produced by the method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080018469A KR100960005B1 (ko) | 2008-02-28 | 2008-02-28 | 알에프 장비의 도금 방법 및 이에 의해 제조된 알에프 장비 |
KR10-2008-0018469 | 2008-02-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009108019A2 true WO2009108019A2 (ko) | 2009-09-03 |
WO2009108019A3 WO2009108019A3 (ko) | 2009-11-12 |
Family
ID=41016607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/000974 WO2009108019A2 (ko) | 2008-02-28 | 2009-02-27 | 알에프 장비의 도금 방법 및 이에 의해 제조된 알에프 장비 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8859049B2 (ko) |
EP (1) | EP2261399B1 (ko) |
KR (1) | KR100960005B1 (ko) |
CN (1) | CN101960055B (ko) |
WO (1) | WO2009108019A2 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI487478B (zh) * | 2012-07-13 | 2015-06-01 | Apone Technology Ltd | 形成金屬構件於機殼的方法 |
CN103582328B (zh) * | 2012-07-23 | 2016-05-18 | 崇鼎科技有限公司 | 形成金属构件于机壳的方法 |
KR101517300B1 (ko) * | 2013-11-21 | 2015-05-04 | 주식회사 유성텔레콤 | 플라즈마 클리닝을 이용한 증착 타입 휴대폰 안테나 제조방법 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2891309A (en) * | 1956-12-17 | 1959-06-23 | American Leonic Mfg Company | Electroplating on aluminum wire |
US3881999A (en) * | 1973-05-25 | 1975-05-06 | Westinghouse Electric Corp | Method of making abrasion resistant coating for aluminum base alloy |
JPS5397937A (en) * | 1977-02-09 | 1978-08-26 | Hitachi Ltd | Silver plating method |
JPS5974569A (ja) * | 1982-10-20 | 1984-04-27 | Olympus Optical Co Ltd | 電子写真感光体およびその製造方法 |
JPH0637716B2 (ja) * | 1987-08-21 | 1994-05-18 | 富士写真フイルム株式会社 | 電解処理方法 |
JPH05195284A (ja) | 1992-01-24 | 1993-08-03 | Hitachi Kyowa Kogyo Co Ltd | 銅合金めっき液 |
US5304962A (en) | 1992-08-11 | 1994-04-19 | At&T Bell Laboratories | Microwave transmission means with improved coatings |
JP3299370B2 (ja) * | 1993-12-22 | 2002-07-08 | 日本エレクトロプレイテイング・エンジニヤース株式会社 | 非シアン銀めっき方法及びそれに用いられる非シアン溶液 |
KR100321802B1 (ko) * | 1999-01-28 | 2002-02-01 | 김계형 | 마이크로 도파관 제품의 은도금 방법 |
JP3255145B2 (ja) * | 1999-04-06 | 2002-02-12 | 日本電気株式会社 | めっき装置 |
TW200641189A (en) * | 2005-02-25 | 2006-12-01 | Applied Materials Inc | Counter electrode encased in cation exchange membrane tube for electroplating cell |
KR100794804B1 (ko) | 2006-08-01 | 2008-01-14 | 주식회사 에이스테크놀로지 | 은도금 처리방법 |
-
2008
- 2008-02-28 KR KR1020080018469A patent/KR100960005B1/ko active IP Right Grant
-
2009
- 2009-02-27 CN CN2009801070117A patent/CN101960055B/zh not_active Expired - Fee Related
- 2009-02-27 WO PCT/KR2009/000974 patent/WO2009108019A2/ko active Application Filing
- 2009-02-27 US US12/919,603 patent/US8859049B2/en not_active Expired - Fee Related
- 2009-02-27 EP EP09715938.8A patent/EP2261399B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
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None |
Also Published As
Publication number | Publication date |
---|---|
WO2009108019A3 (ko) | 2009-11-12 |
US20110005935A1 (en) | 2011-01-13 |
KR100960005B1 (ko) | 2010-05-28 |
EP2261399A4 (en) | 2014-04-23 |
EP2261399B1 (en) | 2015-06-03 |
CN101960055A (zh) | 2011-01-26 |
KR20090093122A (ko) | 2009-09-02 |
EP2261399A2 (en) | 2010-12-15 |
CN101960055B (zh) | 2012-09-05 |
US8859049B2 (en) | 2014-10-14 |
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