WO2014167682A1 - エッチング方法及びエッチング装置 - Google Patents
エッチング方法及びエッチング装置 Download PDFInfo
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- WO2014167682A1 WO2014167682A1 PCT/JP2013/060885 JP2013060885W WO2014167682A1 WO 2014167682 A1 WO2014167682 A1 WO 2014167682A1 JP 2013060885 W JP2013060885 W JP 2013060885W WO 2014167682 A1 WO2014167682 A1 WO 2014167682A1
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- WIPO (PCT)
- Prior art keywords
- etching
- fluid nozzle
- target surface
- sprayed
- liquid
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Classifications
-
- 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
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
- H05K3/068—Apparatus for etching printed circuits
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/08—Apparatus, e.g. for photomechanical printing surfaces
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0736—Methods for applying liquids, e.g. spraying
- H05K2203/075—Global treatment of printed circuits by fluid spraying, e.g. cleaning a conductive pattern using nozzles
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/14—Related to the order of processing steps
- H05K2203/1476—Same or similar kind of process performed in phases, e.g. coarse patterning followed by fine patterning
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
- H05K2203/1509—Horizontally held PCB
Definitions
- the present invention relates to an etching method and an etching apparatus, and more particularly to an etching method and an etching apparatus for pattern-forming a processed conductive layer on a substrate and patterning a wiring portion in a process of manufacturing a printed wiring board.
- etching method for forming a wiring portion with a fine pattern on the surface of a printed wiring board (substrate) on which components such as semiconductors are mounted
- a method of injecting an etching solution onto a substrate from a single fluid nozzle is widely used.
- a resist film which is a mask layer, is patterned in advance on the copper foil, and the copper foil is patterned by bringing the etching solution into contact with the copper foil that is not protected by the resist film.
- the particle size of the etching droplet is large.
- the etching droplet is not etched.
- the upper resist film pattern cannot be etched, and it is difficult to improve the E / F (etch factor).
- a method using a two-fluid nozzle that mixes and jets an etching solution and compressed air has been proposed.
- the two-fluid nozzle By using the two-fluid nozzle, it is possible to make the etching liquid into smaller droplets than the one-fluid nozzle, and the jetting speed is also increased. For example, even in the etching of a pattern miniaturized to 50 ⁇ m or less, a fine droplet of an etching solution can be pushed into the pattern at a high speed to improve the E / F.
- an object of the present invention is to provide an etching method and an etching apparatus capable of obtaining a suitable E / F while minimizing the consumption of compressed air.
- an etching method includes a first etching method in which an etching target surface is etched by spraying an etching solution from one fluid nozzle and spraying the etching target surface on the etching target surface.
- the etching apparatus includes a conveying means, a 1-fluid nozzle, and a 2-fluid nozzle.
- the transport means transports the etching object along a predetermined transport path that sequentially passes through the first etching processing section and the second etching processing section.
- the one-fluid nozzle is disposed in the first etching processing unit and sprays and sprays an etching liquid onto the etching target surface of the etching target conveyed by the conveying unit.
- the two-fluid nozzle is disposed in the second etching processing unit, and mixes and jets an etching solution and a gas onto the etching target surface of the etching target that is transported from the first etching processing unit by the transporting means.
- the two-fluid nozzle sprays an etching liquid in fine droplets onto the surface to be etched with a stronger striking force than the one-fluid nozzle.
- a rough etching process is first performed with an etching solution of relatively large droplets from one fluid nozzle.
- a fine etching process is performed with an etching solution of minute droplets from a two-fluid nozzle, and even in the processing of a miniaturized wiring pattern, the etching droplets are placed in the pattern of the resist film on the layer to be etched. Can be pushed into.
- the two-fluid nozzle is not used for all the etching processes, and the one-fluid nozzle and the two-fluid nozzle are effectively used together, so that a suitable E / F can be achieved while minimizing the consumption of compressed air.
- E / F is the ratio of the etching depth (thickness of the layer to be etched) to the etching amount (undercut amount) in the lateral direction of the layer to be etched, and the larger the value, the better.
- the etching method according to the second aspect of the present invention is the etching method according to the first aspect, wherein the surface to be etched is an upper surface of the object to be etched, and the first etching step is performed from one fluid nozzle.
- the second etching step includes a second suction step of sucking and removing the etchant sprayed from the two-fluid nozzle onto the etching target surface.
- An etching apparatus is the etching apparatus according to the first aspect, and includes suction means disposed in both the first etching processing section and the second etching processing section.
- the conveying means conveys the etching target in a substantially horizontal direction with the etching target surface facing upward.
- the suction means sucks and removes the etchant sprayed from the 1-fluid nozzle and the 2-fluid nozzle onto the surface to be etched.
- the etching solution sprayed from the 1-fluid nozzle and the 2-fluid nozzle is removed early from the etching target surface. Therefore, it is possible to prevent the etching solution from staying which can be an obstacle to spraying the etching solution, and to perform etching with high in-plane uniformity.
- the amount of the etching liquid sprayed from the two-fluid nozzle to the etching target surface with respect to the total amount of the etching liquid sprayed from the one-fluid nozzle and the two-fluid nozzle to the etching target surface.
- the ratio is preferably 2% or more and 50% or less.
- a conductive layer such as a copper foil is formed on both surfaces of an insulating substrate (etching target) 1 made of a thermosetting resin such as an epoxy resin or other resins. 2) is formed with a film thickness of several to several tens of ⁇ m.
- the conductive layer 2 can be formed by any method such as pasting, plating, and vapor phase growth, and both surfaces of the substrate 1 become etching target surfaces.
- a resist film 3 is formed on the conductive layer 2 by a photolithography process (such as a dry film resist or a liquid resist), subjected to pattern exposure, and developed. Then, a resist film 3 is patterned on the conductive layer 2. The resist film 3 is formed on both sides of the substrate 1.
- a photolithography process such as a dry film resist or a liquid resist
- the conductive layer 2 on both sides of the substrate 1 is subjected to an etching process using the resist film 3 as a mask. That is, the conductive layer 2 is etched along the pattern of the resist film 3 to form the wiring portion 2a.
- the resist film 3 is peeled off by, for example, a strong alkaline solution or an organic solvent treatment. Thereby, a desired printed wiring board is formed.
- FIG. 1 is a schematic configuration diagram schematically showing an etching apparatus according to the present embodiment.
- a conveyance path extending in a horizontal straight line from the inlet 14 on one side (left side in FIG. 1) toward the outlet 15 on the other side (right side in FIG. 1) is set.
- a plurality of conveying rollers (conveying means) 16 are provided in the conveying path.
- the conveyance roller 16 conveys the substrate 1 on which the resist film 3 is patterned in a substantially horizontal shape with one surface facing upward and the other surface facing the lower surface along the conveyance path.
- the upper part in the etching processing chamber 11 is roughly divided into a first etching processing unit 12 that performs the first etching process and a second etching processing unit 13 that performs the second etching process.
- the first etching processing unit 12 on the inlet 14 side and the second etching processing unit 13 on the outlet 15 side are sequentially passed.
- a plurality of one-fluid nozzles 20 are arranged in the first etching processing section 12, and a plurality of two-fluid nozzles 30 are arranged in the second etching processing section 13.
- the 1-fluid nozzle 20 and the 2-fluid nozzle 30 may be fixed (stationary) or oscillated (oscillated) with respect to the transport path.
- An etching solution 5 based on cupric chloride, ferric chloride or an alkaline substance is stored in the bottom of the etching processing chamber 11 below the transfer path.
- Each 1-fluid nozzle 20 is connected to a first etching solution supply pipe 21 for supplying the etching solution 5 stored in the etching processing chamber 11.
- the first etchant supply pipe 21 is provided with a first pump 22, a filter 24, and a pressure gauge 23, and the etchant 5 in the etching processing chamber 11 is filtered from the first pump 22 by the filter 24.
- each fluid nozzle 20 is supplied at a predetermined pressure. The supply pressure of the etching liquid to the one fluid nozzle 20 is measured by the pressure gauge 23.
- Each second fluid nozzle 30 is connected to a second etching solution supply pipe 31 for supplying the etching solution 5 stored in the etching processing chamber 11.
- the second etching solution supply pipe 31 is provided with a second pump 32, a filter 34, and a pressure gauge 33, and the etching solution 5 in the etching processing chamber 11 is filtered from the second pump 32 by the filter 34.
- the two fluid nozzles 30 are supplied at a predetermined pressure.
- the supply pressure of the etching liquid to the two-fluid nozzle 30 is measured by the pressure gauge 33.
- the supply to the two-fluid nozzle 30 may use the first pump 22 and the filter 24 without using the second pump 32 and the filter 34.
- an air supply line 40 that supplies compressed air (pressurized air) generated by the gas supply source 41 is connected to each two-fluid nozzle 30.
- the air supply line 40 is provided with an air filter 42, a flow meter 43, and a pressure gauge 44.
- the gas supply source 41 is a fan, a compressor, a blower, or the like.
- the air supply amount to the two-fluid nozzle 30 is measured by the flow meter 43, and the air supply pressure is measured by the pressure gauge 44.
- the fluid nozzle 20 sprays the etchant and sprays it onto the substrate 1.
- the two-fluid nozzle 30 mixes and jets the etching solution and air (pressurized air) separately supplied from different paths, and ejects the fine droplet etching solution from the one-fluid nozzle 20.
- the substrate 1 is sprayed with a striking force greater than 20.
- the 1-fluid nozzle 20 and the 2-fluid nozzle 30 are respectively arranged above and below the conveyance path.
- the upper and lower one fluid nozzles 20 spray and spray an etching solution on the upper surface and the lower surface of the substrate 1 transported by the transport roller 16, respectively. Further, the upper and lower two-fluid nozzles 30 mix and spray an etching solution and air onto the upper and lower surfaces of the substrate 1 conveyed by the conveying roller 16.
- a plurality of etching liquids are sucked and removed from the upper one fluid nozzle 20 and the two fluid nozzles 30 on the upper surface of the substrate 1 above the transport paths of the first and second etching processing units 12 and 13, respectively.
- a plurality of suction units (suction means) 50 are arranged and provided. Each suction unit 50 is formed on a suction pipe (not shown) extending substantially horizontally in a direction substantially orthogonal to the transport path so as to cover the entire width of the substrate 1 and an outer peripheral surface (lower surface in the present embodiment) of the suction pipe.
- It comprises a plurality of slit-like suction nozzles (not shown) that open toward the transport path, and the suction nozzles are arranged between the spraying regions of the etching liquid sprayed from the first fluid nozzle 20 and the second fluid nozzle 30, respectively. Then, a desired suction action is generated in the arrangement region.
- Each suction pipe is connected to a suction port 52 a of an ejector 52 provided in the middle of the circulation line 54 via a suction line 51. Both ends of the circulation pipe line 54 communicate with the inside of the etching chamber 11, and a circulation pump 53 is provided in the middle to form a closed circuit.
- the circulation pump 53 pumps the etching solution 5 in the etching processing chamber 11, returns the pressure to the etching processing chamber 11 again with the ejector 52 applying pressure.
- the suction port 52 a of the ejector 52 has a negative pressure, so that the etching liquid sprayed on the upper surface of the substrate 1 is sucked from the suction nozzle to the suction line. Aspirated through 51.
- etching droplets can be pushed into the pattern of the resist film 3 on the conductive layer 2.
- the two-fluid nozzle 30 is not used for all the etching processes, and the one-fluid nozzle 20 and the two-fluid nozzle 30 are effectively used together, which is preferable while minimizing the consumption of compressed air. E / F can be obtained.
- the etching solution sprayed from the 1-fluid nozzle 20 and the 2-fluid nozzle 30 is removed from the upper surface of the substrate 1 at an early stage, it is possible to prevent the etching solution from staying which can be an obstacle to the spraying of the etching solution. It is possible to perform etching with high in-plane uniformity.
- the ratio of the amount of etching solution sprayed from the two-fluid nozzle 30 to the etching target surface to the etching target surface from the one-fluid nozzle 20 and the two-fluid nozzle 30 is 0%, 2 %, 5%, 11%, 23%, 43%, and 100%, the amount of pressurized air used (L / min) and E / F (etch factor) were measured.
- E / F is the ratio of the etching depth (thickness of the layer to be etched) to the etching amount (undercut amount) in the lateral direction of the layer to be etched, and the larger the value, the better.
- L / S 20/20 ⁇ m pattern was formed on a printed wiring board of 18 ⁇ m copper foil
- L is the width of the wiring pattern (wiring portion 2a) that is the lower layer of the resist film 3
- S is the wiring pattern (adjacent wiring) that is the lower layer of each of the adjacent resist films 3.
- Etching conditions for Sample 1 and Sample 2 were set such that the etching solution pressure in the one-fluid nozzle 20 was set to 0.2 MPa, and the etching solution pressure and the air pressure in the two-fluid nozzle 30 were both set to 0.3 MPa.
- the E / F was as shown in FIGS. It has been found that the E / F is improved when the amount of liquid ejected using the two-fluid nozzle 30 is increased with respect to the total amount of liquid ejected onto the printed wiring board before pattern formation (see FIGS. 3 and 4). . However, when the amount of the spray liquid from the two-fluid nozzle 30 becomes a certain amount or more, the E / F does not change greatly, and the total sprayed amount from the one-fluid nozzle 20 and the two-fluid nozzle 30 is considered in consideration of the amount of pressurized air used.
- the ratio of the amount of spray from the two-fluid nozzle 30 to the ratio is preferably 50% or less.
- the ratio of the amount of the etching solution from the two-fluid nozzle 30 exceeds 50%, 15,000 L / min or more of pressurized air is required.
- the ratio of the amount of the etching solution using the two-fluid nozzle 30 is preferably 2% or more in consideration of the improvement of E / F. From the above, it was found that the ratio of the spray amount from the two-fluid nozzle 30 to the total spray amount from the one-fluid nozzle 20 and the two-fluid nozzle 30 is preferably 2% or more and 50% or less.
- the present invention has been described based on the above embodiment, but the present invention is not limited to the content of the above embodiment, and can be appropriately changed without departing from the present invention. is there.
- the etching process may be performed in a plurality of continuous etching process chambers.
Abstract
Description
2:導電層(被エッチング層)
3:レジスト膜3
10:エッチング装置
12:第1のエッチング処理部
13:第2のエッチング処理部
16:搬送ローラ(搬送手段)
20:1流体ノズル
30:2流体ノズル
50:吸引ユニット(吸引手段)
Claims (6)
- エッチング液を1流体ノズルから噴射してエッチング対象物のエッチング対象面に吹き付けることによって、前記エッチング対象面をエッチングする第1のエッチング工程と、
エッチング液と気体とを混合して2流体ノズルから噴射し、前記第1のエッチング工程でエッチングされた前記エッチング対象面にエッチング液を吹き付けることによって、前記エッチング対象面をさらにエッチングする第2のエッチング工程と、を備え、
前記第2のエッチング工程では、前記第1のエッチング工程よりも微小液滴のエッチング液を、前記第1のエッチング工程よりも強い打力で前記エッチング対象面に吹き付ける
ことを特徴とするエッチング方法。 - 請求項1に記載のエッチング方法であって、
前記エッチング対象面は、前記エッチング対象物の上面であり、
前記第1のエッチング工程は、前記1流体ノズルから前記エッチング対象面に吹き付けられたエッチング液を吸引して除去する第1の吸引工程を含み、
前記第2のエッチング工程は、前記2流体ノズルから前記エッチング対象面に吹き付けられたエッチング液を吸引して除去する第2の吸引工程を含む
ことを特徴とするエッチング方法。 - 請求項2に記載のエッチング方法であって、
前記1流体ノズル及び前記2流体ノズルから前記エッチング対象面へのエッチング液の総吹き付け量に対する前記2流体ノズルから前記エッチング対象面へのエッチング液の吹き付け量の割合は、2%以上50%以下である
ことを特徴とするエッチング方法。 - 第1のエッチング処理部と第2のエッチング処理部とを順に通る所定の搬送経路に沿ってエッチング対象物を搬送する搬送手段と、
前記第1のエッチング処理部に配置され、前記搬送手段によって搬送されるエッチング対象物のエッチング対象面に、エッチング液を噴射して吹き付ける1流体ノズルと、
前記第2のエッチング処理部に配置され、前記搬送手段によって前記第1のエッチング処理部から搬送されるエッチング対象物の前記エッチング対象面に、エッチング液と気体とを混合し噴射して吹き付ける2流体ノズルと、を備え、
前記2流体ノズルは、前記1流体ノズルよりも微小液滴のエッチング液を、前記1流体ノズルよりも強い打力で前記エッチング対象面に吹き付ける
ことを特徴とするエッチング装置。 - 請求項4に記載のエッチング装置であって、
前記第1のエッチング処理部と前記第2のエッチング処理部の双方に配置される吸引手段を備え、
前記搬送手段は、前記エッチング対象面が上方を向いた状態で前記エッチング対象物を略水平方向に搬送し、
前記吸引手段は、前記1流体ノズルと前記2流体ノズルとから前記エッチング対象面にそれぞれ吹き付けられたエッチング液を吸引して除去する
ことを特徴とするエッチング装置。 - 請求項5に記載のエッチング装置であって、
前記1流体ノズル及び前記2流体ノズルから前記エッチング対象面へのエッチング液の総吹き付け量に対する前記2流体ノズルから前記エッチング対象面へのエッチング液の吹き付け量の割合は、2%以上50%以下である
ことを特徴とするエッチング装置。
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PCT/JP2013/060885 WO2014167682A1 (ja) | 2013-04-11 | 2013-04-11 | エッチング方法及びエッチング装置 |
KR1020147009709A KR101622211B1 (ko) | 2013-04-11 | 2013-04-11 | 에칭방법 및 에칭장치 |
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WO2017076640A1 (de) * | 2015-11-04 | 2017-05-11 | Gebr. Schmid Gmbh | Behandlungsfluid-absaugvorrichtung und diese enthaltende ätzvorrichtung |
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CN109187306B (zh) * | 2018-09-06 | 2020-12-04 | 嘉兴市大明实业有限公司 | 一种稀硫酸雾化系统及其应用 |
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- 2013-04-11 KR KR1020147009709A patent/KR101622211B1/ko active IP Right Review Request
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JP2001123282A (ja) * | 1999-10-20 | 2001-05-08 | O K Print:Kk | エッチング装置 |
JP2002256458A (ja) * | 2001-02-28 | 2002-09-11 | Sony Corp | エッチング方法およびエッチング装置 |
JP2008034436A (ja) * | 2006-07-26 | 2008-02-14 | Fuji Kiko:Kk | エッチング装置 |
JP2009059777A (ja) * | 2007-08-30 | 2009-03-19 | Hitachi Chem Co Ltd | 粗化処理装置 |
JP2010287881A (ja) * | 2009-05-14 | 2010-12-24 | Yonezawa Dia Electronics Kk | 基板材の表面処理装置 |
WO2011120509A1 (de) * | 2010-04-01 | 2011-10-06 | Lp Vermarktungs Gmbh & Co. Kg | Vorrichtung und verfahren zum besprühen einer oberfläche eines substrates |
JP2013082975A (ja) * | 2011-10-11 | 2013-05-09 | Kemitoron:Kk | エッチング方法及びエッチング装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2017076640A1 (de) * | 2015-11-04 | 2017-05-11 | Gebr. Schmid Gmbh | Behandlungsfluid-absaugvorrichtung und diese enthaltende ätzvorrichtung |
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KR101622211B1 (ko) | 2016-05-18 |
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