EP1853752A1 - Procede et dispositif de gravure de substrats - Google Patents

Procede et dispositif de gravure de substrats

Info

Publication number
EP1853752A1
EP1853752A1 EP06707264A EP06707264A EP1853752A1 EP 1853752 A1 EP1853752 A1 EP 1853752A1 EP 06707264 A EP06707264 A EP 06707264A EP 06707264 A EP06707264 A EP 06707264A EP 1853752 A1 EP1853752 A1 EP 1853752A1
Authority
EP
European Patent Office
Prior art keywords
voltage
substrates
etching
substrate
spray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06707264A
Other languages
German (de)
English (en)
Inventor
Christian Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Schmid GmbH and Co
Original Assignee
Gebrueder Schmid GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebrueder Schmid GmbH and Co filed Critical Gebrueder Schmid GmbH and Co
Publication of EP1853752A1 publication Critical patent/EP1853752A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • 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
    • H05K3/07—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 being removed electrolytically
    • 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
    • H05K2203/10—Using electric, magnetic and electromagnetic fields; Using laser light
    • H05K2203/105—Using an electrical field; Special methods of applying an electric potential

Definitions

  • the invention relates to an apparatus for etching substrates with egg g ⁇ nneerr SSpprrüühhvvoorrrriicchhttuunngg ttoo AAuuffsspprühen of etching liquid to the sub- strat i and a method therefor.
  • etching baths for example hydrochloric acid or sulfuric acid, peroxide-containing and iron-containing as well as iron-free and alkaline chemical etching baths.
  • inorganic or organic additive additives can be used to metal or semiconductor substrates and plastic substrates with chemically and then galvanically metallized substrates such as printed circuit boards, which carry so-called base copper, subject to ⁇ tz Jardintechnik.
  • a similar etching process is disclosed for example in DE 23 64 162 A1.
  • conductor track structures are etched free on a printed circuit board according to a pattern which has been produced by an applied photoresist.
  • Known etching techniques produce a cross-sectional structure of the remnant conductors which is significantly wider at the base than at the top.
  • trapezoidal cross-sectional profiles are considered negative because they take up too much space. They should be avoided as much as possible.
  • the invention has for its object to provide a device mentioned above and a method mentioned above, with the NEN problems of the prior art can be avoided and in particular an etching of substrates or interconnect structures or the like. can be improved on substrates.
  • a voltage is applied between the spray jet and thus the spray liquid or spray nozzle on the one hand and the substrate on the other hand.
  • a kind of anodic or voltage-assisted improvement of the etching process can be achieved. It has been found in the context of the invention that on the one hand the etching process can be carried out faster, that is, less time is required. Furthermore, it has been found that the cross-section of etched-out conductor track structures has steeper flanks or the cross-section of a rectangle shape regarded as ideal is approximated. This application of the additional voltage does not represent a particularly great expense for a device according to the invention or in carrying out the method.
  • the voltage can be applied on the one hand by connecting one pole of the voltage or the corresponding voltage source to a part of the spraying device or by contacting it with it.
  • liquid-conducting parts such as pipes, preferably of metal such as titanium or the like, or spray nozzles can be contacted themselves.
  • the plastic spray cans are advantageous. manufactures, so that a contact should rather be made via a conduit, such as a conduit from which branch off the spray nozzles.
  • contacts can be arranged in the interior of such a conduit as inserts or the like. In this way, virtually the exiting spray spray or the spraying liquid or etching liquid is contacted with the voltage source.
  • the second contact can be done according to a first embodiment of the invention in that the substrate is contacted directly electrically, for example via attached contact clips, contact rollers or the like .
  • the substrate directly electrically conductive with a pole or the positive pole of a voltage source or be connected to a corresponding potential.
  • an auxiliary electrode can be used, which is arranged relatively close to the substrate and instead of its direct contact with the voltage source is connected.
  • Such an auxiliary electrode is thereby an electrical contact to the electrical substrate is that it is hit by the same spray or the spray liquid, which also reaches the substrate, and thus results in an electrical contact.
  • the auxiliary electrode may be connected to a collecting bath for the etching liquid or may be immersed therein at least partially, and make electrical contact therewith via etching liquid flowing away from the substrates.
  • the voltage used can either be potentiostatic, advantageously with a constant DC voltage source.
  • the magnitude of the voltage can be in the range of a few V, advantageously 10 V to 15 V. Particularly advantageous results have given a voltage of 12 V with an applied current of 0.1 A.
  • a pulsed voltage may be used.
  • the height of the voltage pulses should be in something in the aforementioned range.
  • the shape of the voltage pulses can remain essentially the same, which reduces the control effort for the voltage source.
  • the aforementioned flanks of the interconnect structures are formed or influenced, so that this period is particularly significant.
  • thermodynamics of the etching process can be influenced better.
  • the arrangement of the substrates during the spraying or etching process can be either vertical, in particular hanging.
  • the substrates may be mounted horizontally and, for example, on a roller conveyor or the like. be transported.
  • etching liquid CuCl can be used. This is with etched copper from the substrates or interconnect structures to Cu 2 CI 2 .
  • FIG. 1 shows a functional representation of an etching apparatus with a vertically arranged substrate
  • FIG. 2 shows an alternative embodiment of an etching apparatus with horizontally arranged substrates on a roller conveyor over an etching bath sump and an auxiliary anode
  • FIG. 1 shows an etching device 11. It has a spraying device 13, which consists of a straight line pipe 14 with several spray nozzles 15. To supply the spray device 13 with spray liquid or etching liquid 16, which is discharged therefrom as spray 17, a pump 19 is provided. This sucks the spray liquid from a collecting trough 26 or the like. from. In front of the spray device 13 and in the impact area of the spray 17 is a substrate 21, arranged vertically. It is arranged such that it is struck substantially uniformly by the spray 17 and thus the etching liquid from the spray nozzles 15. This is the etching process, which need not be discussed in more detail here.
  • the conduit 14 is connected to the negative pole of a voltage source 23. It consists of metal, for example titanium, so that it is electrically conductive as a whole and the passing spray liquid or etching liquid 16 is contacted with the minus pole of the voltage source 23.
  • the substrate 21 in turn is connected via a schematically illustrated contact terminal 24 to the positive pole of the voltage source 23.
  • a potential-applied etching takes place when the spray liquid 17 connected to the minus pole impinges on the substrate 21.
  • This process can also be regarded as spray etching electrolysis.
  • the contact terminals 24 can simultaneously be a holder for the substrate 21 or hold it in the vertical position. Such a contact terminal 24 may or the like on a travel rail. be arranged, whereby a plurality of substrates 21 can be brought one after the other for the Sprühiservorgang before the fixed spray device 13.
  • FIG. 1 An alternative embodiment of an etching apparatus 111 is shown in FIG. On the one hand, it differs from the above-mentioned one in that the substrate 121 is etched horizontally or lying flat, whereby it is transported on a roller conveyor 122.
  • the corresponding spray device 113 also extends horizontally and in turn consists of a conduit 14 with attached spray nozzles 115.
  • the conduit 114 is in turn connected to the negative pole of a voltage source 123.
  • the supply of etching liquid 116 is again effected by means of a pump 119, so that spray mist 117 with the etching liquid 116 emerges from the spray nozzles 115.
  • the substrate 121 is in a kind of spray etching chamber with the collection trough 126 arranged underneath.
  • An auxiliary anode 128 is arranged in this collecting trough 126. This is connected to the positive pole of the voltage source 23.
  • such an auxiliary selector 128 can be implemented in FIG.
  • the etching process together with the function of the voltage source 123, takes place as explained above, that is to say either in a potentiostatic manner or with voltage pulses.
  • the invention can also be used for other etching processes, for example in the printed circuit board industry for thinning the printed circuit board copper, as well as in general metal finishing the etching of metals such as stainless steel or other metal alloys ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Printed Circuit Boards (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

L'invention vise à améliorer la gravure de structures de pistes conductrices, par exemple, sur des plaquettes (21), au moyen d'un liquide de gravure. A cet effet, le liquide de gravure peut être pulvérisé en tant que brouillard de pulvérisation (17) ou similaire sur la plaquette (21). La mise en contact d'un dispositif de pulvérisation correspondant (13, 14) à un pôle, et de la plaquette (21) à l'autre pôle d'une source de tension continue (23) permet d'assister le processus de gravure, notamment de l'accélérer.
EP06707264A 2005-03-04 2006-02-24 Procede et dispositif de gravure de substrats Withdrawn EP1853752A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510011298 DE102005011298A1 (de) 2005-03-04 2005-03-04 Vorrichtung und Verfahren zum Ätzen von Substraten
PCT/EP2006/001728 WO2006094657A1 (fr) 2005-03-04 2006-02-24 Procede et dispositif de gravure de substrats

Publications (1)

Publication Number Publication Date
EP1853752A1 true EP1853752A1 (fr) 2007-11-14

Family

ID=36128468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06707264A Withdrawn EP1853752A1 (fr) 2005-03-04 2006-02-24 Procede et dispositif de gravure de substrats

Country Status (4)

Country Link
EP (1) EP1853752A1 (fr)
CN (1) CN101163823B (fr)
DE (1) DE102005011298A1 (fr)
WO (1) WO2006094657A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871120B (zh) * 2010-06-29 2012-05-02 常州市正成标牌设备有限公司 一种金属板电解蚀刻方法及其蚀刻机
CN101871121B (zh) * 2010-06-29 2012-07-04 常州市正成标牌设备有限公司 金属板材电解蚀刻方法及其蚀刻机
DE102017212887A1 (de) 2017-07-26 2019-01-31 Gebr. Schmid Gmbh Verfahren, Vorrichtung und Anlage zur Leiterplattenherstellung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL104994C (fr) * 1955-06-23
GB806346A (en) * 1956-01-24 1958-12-23 Gen Electric Co Ltd Improvements in or relating to the etching of semiconductors
JPS526853B2 (fr) * 1972-12-22 1977-02-25
FR2381567A1 (fr) 1977-02-24 1978-09-22 Fmc Corp Dispositif d'electrolyse par projection
JPS54124843A (en) 1978-03-22 1979-09-28 Sony Corp Processing of ferrite
JPS57110690A (en) 1980-12-24 1982-07-09 Ibm Growing of tentrite by electroplating
JP2576142B2 (ja) * 1987-08-31 1997-01-29 富士通株式会社 スプレー式エッチング方法
JP4061688B2 (ja) * 1998-01-19 2008-03-19 Ｊｆｅスチール株式会社 金属ストリップの連続電解エッチング方法および装置
JP4560181B2 (ja) * 2000-06-30 2010-10-13 アイシン高丘株式会社 燃料電池セパレータの製造方法および製造装置
SE519898C2 (sv) * 2001-09-10 2003-04-22 Obducat Ab Sätt att etsa koppar på kort samt anordning och elektrolyt för utförande av sättet
US6833063B2 (en) 2001-12-21 2004-12-21 Nutool, Inc. Electrochemical edge and bevel cleaning process and system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006094657A1 *

Also Published As

Publication number Publication date
CN101163823B (zh) 2011-04-13
WO2006094657A1 (fr) 2006-09-14
CN101163823A (zh) 2008-04-16
DE102005011298A1 (de) 2006-09-07

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