CN1326435C - Conductor track structures and method for production thereof - Google Patents

Conductor track structures and method for production thereof Download PDF

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Publication number
CN1326435C
CN1326435C CNB028126092A CN02812609A CN1326435C CN 1326435 C CN1326435 C CN 1326435C CN B028126092 A CNB028126092 A CN B028126092A CN 02812609 A CN02812609 A CN 02812609A CN 1326435 C CN1326435 C CN 1326435C
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China
Prior art keywords
electromagnetic radiation
metal
loading material
laser
wavelength
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CNB028126092A
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Chinese (zh)
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CN1518850A (en
Inventor
格哈德·瑙恩多夫
霍斯特·维斯柏罗克
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LPKF Laser and Electronics AG
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LPKF Laser and Electronics AG
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Priority claimed from DE10132092A external-priority patent/DE10132092A1/en
Application filed by LPKF Laser and Electronics AG filed Critical LPKF Laser and Electronics AG
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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
    • H05K3/10—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
    • H05K3/182—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 characterised by the patterning method
    • H05K3/185—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 characterised by the patterning method by making a catalytic pattern by photo-imaging
    • 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
    • C23C18/1601—Process or apparatus
    • C23C18/1603—Process or apparatus coating on selected surface areas
    • C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
    • C23C18/1608—Process or apparatus coating on selected surface areas by direct patterning from pretreatment step, i.e. selective pre-treatment
    • 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
    • C23C18/1601—Process or apparatus
    • C23C18/1603—Process or apparatus coating on selected surface areas
    • C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
    • C23C18/1612—Process or apparatus coating on selected surface areas by direct patterning through irradiation means

Abstract

The invention relates to conductor tracks placed on an electrically non-conductive supporting material, which are comprised of metal nuclei and of a metallization subsequently applied thereto, whereby the metal nuclei are produced by using electromagnetic radiation to break up electrically non-conductive metal compounds contained in the supporting material in a dispersed manner. The invention also relates to a method for producing the conductor track structures themselves. The invention is characterized in that the electrically non-conductive metal compounds are formed from insoluble inorganic oxides, which are highly stable with regard to heat, stable in aqueous, acid or alkaline metallization baths, and which are higher oxides with the structure of the spinel or are simple d-metal oxides or mixtures thereof or mixed metal compounds that are similar to the spinel structures, and these metal compounds remain unchanged in non-radiated areas. The employed inorganic oxides are temperature-resistant whereby remaining stable after being subjected to soldering temperatures. The conductor tracks can be reliably and easily produced whereby obtaining a very high adhesive strength.

Description

The manufacture method of conductor track structure
The present invention relates to the manufacture method of the conductor track structure on nonconducting carrier material.
At patent application DE 197.23734.7-34 and DE 1973346.9 and professional journals " metal surface " (" metalloberfl  che ") the 54th volume o. 11th (2000) " metallization of the fine structure of polymer " (in " Feinstrukturierte Metallisierung von Polymeren " disclosed method, meticulous in order to make, the conductive guide structure of adhering to, in nonconducting loading material, mix nonconducting metal-chelating complex compound, and utilize the laser beam cracking to go out the metallization nucleus of being constructed by it, these metallization nucleus cause consequential chemical reduction reaction metallization in the illuminated surface region.)
This method can be used for adopting the spray to cast method to make circuit carrier by thermoplastic plastics.Available in addition other method is made three-dimensional spray to cast circuit carrier, and promptly the method for so-called " modular interconnect devices " has the following advantages: the instrument expense of making usefulness can keep relatively low.The step of required in addition production process can reduce, because the metal-chelating complex compound of Tui Bianing can not be retained in the not irradiated zone, circuit carrier surface.Also can produce for the median size number of packages very economically, and can realize meticulous especially structure chart resolution.
With respect to so-called advantage, the thermal stability that the shortcoming of said method is above-mentioned metal-chelating complex compound is for modern high temperature plastics-be in the critical range as the processed temperature of LCP-.Therefore this method only can be applied in the material field that becomes more and more important for pb-free solder technology in the future with limitation.The metal-chelating compound body must adopt higher relatively doping in addition, is used for quick metallization with the nucleus that obtains sufficient density under laser action.Yet high compound body composition can damage the required important performance of loading material usually, as fracture strength and toughness.
In addition, the work report 1999 of the Erlangen-N ü rnberg LFT of university discloses a kind of similar method, wherein by the isolated metallization nucleus of laser beam unlike top described chemical bond, but the isolation by metal particle and physics passivation.Because segregate particulate is obviously greater than the molecule of typical metal-chelating compound body, here than can cause by the metal-chelating compound body that separation by laser goes out " a small amount of in the plastics mix and laser radiation after high grain density " between bigger contradiction.
WO 0035259A2 has described a kind of method that is used for making meticulous metallic conductor track structure on non-conductive loading material, one of them non-conductive heavy metal synthetic that is made of organic complexing agent is applied on the loading material or is embedded in the loading material, loading material in producing the zone of conductor track structure selectively by ultraviolet irradiation, simultaneously the heavy metal nucleus is separated, and this zone is by with the chemical mode reducing metalization.Here can make the fine structure of conductor rail by simple and reliable method.
The objective of the invention is to provide on circuit carrier can be simply and the conductor track structure of producing reliably, this structure contains the additive composition of the formation nucleus of relatively small amount, and it is still stable under welding temperature, the present invention also aims to provide the method that a kind of better way is made conductor track structure in addition, wherein can adopt synthetic or spray to cast, and modern high temperature plastics.
According to an aspect of the present invention, a kind of method that is used to make the conductor track structure on nonconducting loading material is provided, wherein said conductor track structure is made of metal nucleus and the follow-up metal layer that applies on the metal nucleus, described metal nucleus forms by the meticulous fracture that is included in the non conducting metallized compound in the described loading material that electromagnetic radiation realizes with distributing, highly heat-staple, stable and undissolved in moisture acidity or alkalinous metal electrolyte, nonconducting higher-order oxide or the simple d-metal oxide of similar spinelle or its mixture or mixed-metal compounds based on spinelle is impregnated in the described loading material, described loading material is processed to member or is coated on the member as coating, and in will producing the zone of conductor track structure, isolate the heavy metal nucleus, should be metallized by electronation in the zone then by electromagnetic radiation.Nonconducting metallic compound by highly heat-staple, stable and undissolved inorganic oxide constitutes in moisture acidity or alkalinous metal electrolyte, these oxides are the higher-order oxides with spinel structure, or simple d-metal oxide or its mixture or the mixed-metal compounds of similar spinelle, can make like this on the loading material surface that metallic compound remains unchanged in the not irradiated zone.Employed inorganic oxide is heat-resisting, and they still keep stable, promptly still non-conductive after the welding temperature effect like this, and keeps stable being used for metallized electrolyte.Under the laser sintered situation of plastic powders selectively (in fact " rapid shaping " is more laser sintered more known than selectively), employed inorganic oxide is heat-resisting especially, can form a member like this when pulverous output material local melting, it also is nonconducting and is stable being used for metallized electrolyte.Same these methods can be considered to make member by liquid phase material." conductor track structure " this notion also comprises this extreme case of full surface metalation that often carries out for the shielding purpose in the electronic technology.
According to a execution mode of the present invention, isolate the heavy metal nucleus simultaneously by means of a branch of electromagnetic radiation, and form one by deteriorating and increase the subordinate list face with advantage.Realized the good tack of segregate metallic conduction track by simple means like this.
Inorganic oxide contains copper and is good in addition.
According to an execution mode with advantage of the present invention, nonconducting carrier material also contains heat-staple organic metal chelating compound body at least except that containing at least the spinelle.
Nonconducting loading material is thermoplasticity or hard thermoplastic plastic preferably.Nonconducting loading material can comprise one or more organic fillers, and they for example are made of silicic acid and/or silica derivative.
In the method for the invention, highly heat-staple, stable and undissolved in moisture acidity or alkalinous metal electrolyte, nonconducting higher-order oxide based on spinelle is impregnated in the loading material, loading material is processed to member or is coated on the member as coating, and in will producing the zone of conductor track structure, isolate the heavy metal nucleus by electromagnetic radiation, being metallized by electronation then in this zone, especially can also make in not irradiated zone, loading material surface inorganic metal compound still can keep the form based on the higher-order oxide of spinelle.Employed inorganic oxide is normally heat-resisting, therefore can use synthetic or spray to cast, and modern high temperature plastics.In addition, they still keep stable after the welding temperature effect, and promptly they are still non-conductive and keep stable being used for metallized electrolyte.
According to a execution mode of the present invention, isolate the heavy metal nucleus simultaneously by a branch of electromagnetic radiation, and form one by deteriorating and increase the subordinate list face with advantage.Realized the good tack of segregate metallic conduction track by simple means like this.
Inorganic oxide contains copper and is good in addition.
According to an execution mode with advantage of the present invention, nonconducting loading material also contains heat-staple organic metal chelating compound body at least except that containing a kind of inorganic oxide beyond the region of objective existence at least.
Nonconducting loading material is thermoplasticity or hard thermoplastic plastic preferably.But loading material also can be by other suitable non-conducting material, and for example ceramic material constitutes.Nonconducting loading material also can comprise one or more organic fillers, and they for example are made of silicic acid and/or silica derivative.
What have advantage is to utilize the electromagnetic radiation of laser to isolate the heavy metal nucleus.Wavelength of Laser preferably can be 248nm, 308nm, 335nm, 532nm, 1064nm or 10600nm.
By an embodiment the present invention is described below:
In an extruder with the polybutylene terephthalate (PBT) (polybuthylentherephthalat) of 70% quality and the pyrolysis silicic acid of 25% quality, with 90m 2The BET surface area of/g (with the catalyst surface area of cloth Shandong glass E-Ai Meite-Taylor's method mensuration) and 5% cupric spinelle PK3095 (Ferro company product) are synthetic.Particle is processed to a member with the spray to cast method, for example a shell.This shell then to form conductor rail the zone in certain intensity irradiating laser ray, laser beam is produced by the Nd:YAG laser (neodymium doped yttrium aluminium garnet laser) of a diode excitation, and the laser intensity that is adopted forms the very little connection that is connected with the nucleus that is configured and deteriorates.Carry out in containing the ultrasonic cleaning groove of softened water after the short time processing, this shell is suspended in the general electronation copper facing groove.In irradiated zone, form conductor rail.
Also to point out, think metal and nonmetal in the art, be stable as the simple inorganic combination of carbide, oxide or sulfide, and only in the time in base metal, can presenting reducing medium simultaneously under the situation that high-energy is supplied with, just be suitable for.In addition, in surrounding air, especially under the non-precious metal situation, the metal of formation and the airborne oxygen formation metal oxide that can react immediately.Surprisingly according to the present invention, metal is peeled off out and be reduced into to the metal oxide available Nd:YAG laser in conventional surrounding air with the spinel structure in the meticulous ground embedding plastic substrate that distributes.Yet the gaseous decomposition product of the plastics of formation covers on the metal nucleus of formation simultaneously under the very high very short laser pulse effect of energy, forms enough shielding actions.

Claims (15)

1. be used to make the method for the conductor track structure on nonconducting loading material, wherein said conductor track structure is made of metal nucleus and the follow-up metal layer that applies on the metal nucleus, described metal nucleus forms by the meticulous fracture that is included in the non conducting metallized compound in the described loading material that electromagnetic radiation realizes with distributing, it is characterized in that, highly heat-staple, stable and undissolved in moisture acidity or alkalinous metal electrolyte, nonconducting higher-order oxide or the simple d-metal oxide of similar spinelle or its mixture or mixed-metal compounds based on spinelle is impregnated in the described loading material, described loading material is processed to member or is coated on the member as coating, and in will producing the zone of conductor track structure, isolate the heavy metal nucleus, should be metallized by electronation in the zone then by electromagnetic radiation.
2. the method for claim 1 is characterized in that, isolates the heavy metal nucleus simultaneously by means of electromagnetic radiation, and forms one by deteriorating and increase the subordinate list face.
3. method as claimed in claim 1 or 2 is characterized in that spinelle contains copper.
4. method as claimed in claim 1 or 2 is characterized in that, non-conductive loading material also contains heat-staple organic metal chelate complexes at least except that containing the inorganic oxide beyond the region of objective existence at least.
5. method as claimed in claim 1 or 2 is characterized in that non-conductive loading material is a thermoplastics.
6. method as claimed in claim 1 or 2 is characterized in that, non-conductive loading material is hard thermoplastic plastic.
7. method as claimed in claim 1 or 2 is characterized in that, non-conductive loading material contains one or more inorganic filler matter.
8. method as claimed in claim 7 is characterized in that, non-conductive loading material contains silicic acid and/or silica derivative as packing material.
9. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of laser.
10. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 248nm wavelength.
11. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 308nm wavelength.
12. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 355nm wavelength.
13. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 532nm wavelength.
14. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 1064nm wavelength.
15. method as claimed in claim 1 or 2 is characterized in that, uses the electromagnetic radiation of the laser with 10600nm wavelength.
CNB028126092A 2001-07-05 2002-06-19 Conductor track structures and method for production thereof Ceased CN1326435C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10132092A DE10132092A1 (en) 2001-07-05 2001-07-05 Track structures and processes for their manufacture
DE10132092.2 2001-07-05
EP01130189A EP1274288B1 (en) 2001-07-05 2001-12-19 Conducting path structures and method of making
EP01130189.2 2001-12-19

Publications (2)

Publication Number Publication Date
CN1518850A CN1518850A (en) 2004-08-04
CN1326435C true CN1326435C (en) 2007-07-11

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CN (1) CN1326435C (en)
WO (1) WO2003005784A2 (en)

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