JP4889045B2 - Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst - Google Patents

Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst Download PDF

Info

Publication number
JP4889045B2
JP4889045B2 JP2007535424A JP2007535424A JP4889045B2 JP 4889045 B2 JP4889045 B2 JP 4889045B2 JP 2007535424 A JP2007535424 A JP 2007535424A JP 2007535424 A JP2007535424 A JP 2007535424A JP 4889045 B2 JP4889045 B2 JP 4889045B2
Authority
JP
Japan
Prior art keywords
catalyst
hole
compound
electroless plating
printed wiring
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.)
Active
Application number
JP2007535424A
Other languages
Japanese (ja)
Other versions
JPWO2007032222A1 (en
Inventor
寿文 河村
徹 伊森
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.)
JX Nippon Mining and Metals Corp
Original Assignee
JX Nippon Mining and Metals Corp
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 JX Nippon Mining and Metals Corp filed Critical JX Nippon Mining and Metals Corp
Priority to JP2007535424A priority Critical patent/JP4889045B2/en
Publication of JPWO2007032222A1 publication Critical patent/JPWO2007032222A1/en
Application granted granted Critical
Publication of JP4889045B2 publication Critical patent/JP4889045B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C18/00Chemical 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
    • C23C18/16Chemical 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
    • C23C18/18Pretreatment of the material to be coated
    • C23C18/20Pretreatment of the material to be coated of organic surfaces, e.g. resins
    • C23C18/28Sensitising or activating
    • C23C18/30Activating or accelerating or sensitising with palladium or other noble metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/12Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
    • B01J31/123Organometallic polymers, e.g. comprising C-Si bonds in the main chain or in subunits grafted to the main chain
    • B01J31/124Silicones or siloxanes or comprising such units
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1805Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
    • B01J31/181Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
    • B01J31/1815Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/11Printed elements for providing electric connections to or between printed circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/40Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/42Plated through-holes or plated via connections
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/40Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/42Plated through-holes or plated via connections
    • H05K3/422Plated through-holes or plated via connections characterised by electroless plating method; pretreatment therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80Complexes comprising metals of Group VIII as the central metal
    • B01J2531/82Metals of the platinum group
    • B01J2531/824Palladium
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/07Treatments involving liquids, e.g. plating, rinsing
    • H05K2203/0703Plating
    • H05K2203/0716Metallic plating catalysts, e.g. for direct electroplating of through holes; Sensitising or activating metallic plating catalysts
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/38Improvement of the adhesion between the insulating substrate and the metal
    • H05K3/389Improvement of the adhesion between the insulating substrate and the metal by the use of a coupling agent, e.g. silane

Description

本発明は、スルーホールを有するプリント配線基板に用いられる無電解めっき用触媒、およびその触媒を用いて処理されたスルーホールを有するプリント配線基板に関する。   The present invention relates to a catalyst for electroless plating used in a printed wiring board having a through hole, and a printed wiring board having a through hole processed using the catalyst.

プリント配線基板の基材に、銅、ニッケル等の無電解めっきを施し、金属層を形成する際に、基材にめっき層を均一に形成させるために、無電解めっきを施す前に、基材の表面にパラジウム等の触媒を付与する前処理方法が知られている。例えば、Sn−Pdコロイド溶液中に基材を浸漬させる方法、蒸着またはスパッタリングで触媒を添着させる方法等が用いられている。接続用のスルーホールを有するプリント配線基板においても、スルーホールを形成した後、同様に前処理し、無電解めっきにより、金属層を形成することが知られている(特許文献1、特許文献2参照)。   When performing electroless plating such as copper and nickel on the base material of the printed wiring board and forming a metal layer, the base material is applied before electroless plating to form a uniform plating layer on the base material. There is known a pretreatment method for imparting a catalyst such as palladium to the surface. For example, a method of immersing a substrate in a Sn—Pd colloid solution, a method of attaching a catalyst by vapor deposition or sputtering, and the like are used. Also in a printed wiring board having a through hole for connection, it is known that after forming a through hole, pretreatment is performed in the same manner, and a metal layer is formed by electroless plating (Patent Documents 1 and 2). reference).

近年、電子機器の小型化、軽量化、高速化の要求に対応して、プリント配線基板の高密度化が進んでいる。プリント配線基板の高密度化に伴い、スルーホールを有するプリント配線基板においては、スルーホールの直径が従来の200μm超から細径化し、200μm以下となっている。スルーホールを有するプリント配線基板においては、スルーホール側壁にもめっき層が均一に形成されることが望まれるが、スルーホールの細径化により、無電解めっきを行った際に、スルーホールの側壁にボイド(微小無めっき部分)が発生することが問題になっている。これは、上記前処理で触媒を付与する際に、細径化したスルーホールの側壁に触媒が均一に付与されなかったため生じたものと考えられる。   In recent years, printed circuit boards have been increased in density in response to demands for smaller, lighter, and faster electronic devices. With the increase in the density of printed wiring boards, in the printed wiring board having through holes, the diameter of the through holes has been reduced from the conventional over 200 μm to 200 μm or less. In a printed wiring board having a through hole, it is desirable that a plating layer be uniformly formed on the side wall of the through hole. However, when the electroless plating is performed by reducing the diameter of the through hole, the side wall of the through hole is desired. It is a problem that voids (micro unplated portions) are generated in the surface. This is considered to have occurred because the catalyst was not uniformly applied to the side wall of the narrowed through hole when the catalyst was applied in the pretreatment.

触媒を付与する方法として、上記Sn−Pdコロイド溶液中に基材を浸漬させる方法においては、直径が200μm以下のスルーホールを有するプリント配線基板では、Sn−Pdコロイドは大きい(粒径0.1〜1.0μm)ため、微小部分へ回り込みにくく、スルーホール側壁においては、触媒がまばらについてボイド発生しやすい。また、Sn−Pdコロイドを用いためっきプロセスは、触媒付与工程+めっき工程を複数行うことでボイド発生を防いでいるので、工程が複雑になり、コストもかかる。また、蒸着やスパッタリング法では、スルーホール側壁に均一に触媒を付与することは難しく、コストもかかる。
特開2005−136316号公報 米国特許第6,630,743 B2明細書
In the method of immersing the base material in the Sn-Pd colloid solution as a method for applying the catalyst, the Sn-Pd colloid is large (particle size 0.1) on the printed wiring board having a through hole having a diameter of 200 μm or less. ˜1.0 μm), it is difficult to go around to a minute portion, and the catalyst tends to be sparsely voided on the side wall of the through hole. In addition, the plating process using the Sn—Pd colloid prevents the generation of voids by performing a plurality of catalyst applying steps + plating steps, which makes the steps complicated and costly. Further, in the vapor deposition or sputtering method, it is difficult and costly to apply the catalyst uniformly to the through-hole sidewall.
JP 2005-136316 A US Pat. No. 6,630,743 B2 specification

本発明は、プリント配線基板の高密度化により、直径が200μm以下であるスルーホールを有するプリント配線基板においても、スルーホール側壁にボイド発生がなく、均一に無電解めっきが可能な無電解めっき用触媒を提供することを目的とする。   The present invention is for electroless plating capable of uniform electroless plating without causing voids on the side wall of the through hole even in a printed wiring board having a through hole having a diameter of 200 μm or less by increasing the density of the printed wiring board. An object is to provide a catalyst.

本発明者等は、上記課題について鋭意検討を行った結果、分子内に貴金属を捕捉しえる官能基を有する化合物と貴金属化合物とを含有する触媒を用いて基材に触媒を付着させ、無電解めっきを行うことにより、直径が200μm以下のスルーホールを有するプリント配線基板においても、スルーホールの側壁にボイド発生がなく、均一にめっきされることを見出した。   As a result of intensive studies on the above problems, the present inventors attached a catalyst to a substrate using a catalyst containing a compound having a functional group capable of capturing a noble metal in the molecule and a noble metal compound, It has been found that by plating, even in a printed wiring board having a through hole having a diameter of 200 μm or less, the side wall of the through hole has no voids and is uniformly plated.

即ち、本発明は以下のとおりである。
(1)直径200μm以下の微細スルーホールを有するプリント配線基板の無電解めっきに用いる無電解めっき用触媒を含む溶液であって、該触媒が分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物と貴金属化合物とからなることを特徴とする前記無電解めっき用触媒を含む溶液。
(2)前記分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物が、アゾール系またはアミン化合物とエポキシシラン系化合物との反応により得られることを特徴とする前記(1)記載の無電解めっき用触媒を含む溶液。
(3)前記分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物が、アミノ基を有するシランカップリング剤であることを特徴とする前記(1)記載の無電解めっき用触媒を含む溶液。
(4)前記貴金属化合物がパラジウム化合物であることを特徴とする前記(1)〜(3)のいずれか一項に記載の無電解めっき用触媒を含む溶液。
That is, the present invention is as follows.
(1) A silane cup containing a catalyst for electroless plating used for electroless plating of a printed wiring board having a fine through-hole having a diameter of 200 μm or less, the catalyst having a functional group capable of capturing a noble metal in the molecule A solution containing a catalyst for electroless plating, which comprises a ring agent compound and a noble metal compound.
(2) a silane coupling agent compound having a functional group which can capture a noble metal in the molecule, said characterized in that it is obtained by a reaction between A tetrazole-based or amine compound with an epoxysilane compound (1) wherein A solution containing a catalyst for electroless plating.
(3) The electroless plating catalyst according to (1), wherein the silane coupling agent compound having a functional group capable of capturing a noble metal in the molecule is a silane coupling agent having an amino group. Containing solution.
(4) The solution containing the electroless plating catalyst according to any one of (1) to (3), wherein the noble metal compound is a palladium compound.

本発明の無電解めっき用触媒を用いて処理された後、無電解めっきされたスルーホールを有するプリント基板は、スルーホールの直径が200μm以下であっても、スルーホールの側壁にも均一にめっきされ、ボイド発生がない。したがって、工程が簡略化でき、歩留まりを向上することができる。   After the treatment with the electroless plating catalyst of the present invention, the printed circuit board having the electroless plated through hole is uniformly plated on the side wall of the through hole even if the through hole has a diameter of 200 μm or less. There is no void generation. Therefore, the process can be simplified and the yield can be improved.

実施例1における無電解めっき後のスルーホール内部の写真である。2 is a photograph of the inside of a through hole after electroless plating in Example 1. 比較例1における無電解めっき後のスルーホール内部の写真である。2 is a photograph of the inside of a through hole after electroless plating in Comparative Example 1.

本発明は、スルーホールを有するプリント配線基板に用いる無電解めっき用触媒であって、分子内に貴金属を捕捉しえる官能基を有する化合物と貴金属化合物を含むことを特徴とする。   The present invention is a catalyst for electroless plating used for a printed wiring board having a through hole, and includes a compound having a functional group capable of capturing a noble metal in a molecule and a noble metal compound.

分子内に貴金属を捕捉しえる官能基を有する化合物と貴金属化合物を含む触媒により、被めっき面に対して分子内に貴金属を捕捉しえる官能基を有する化合物を介して貴金属触媒をより均一に、より確実に固着することができる。また、この触媒は分子サイズが小さいため、容易に細径スルーホール内へ回り、スルーホール側壁においても均一に、より確実に固着することができる。そのため、この触媒付着後に無電解めっきをするとボイド発生がなく、均一にめっきすることができる。   With a compound having a functional group capable of capturing a noble metal in the molecule and a catalyst containing the noble metal compound, the noble metal catalyst can be more uniformly distributed through the compound having a functional group capable of capturing the noble metal in the molecule with respect to the surface to be plated. It can be more securely fixed. In addition, since the catalyst has a small molecular size, it can easily go into the small-diameter through-hole, and can be fixed evenly and reliably on the side wall of the through-hole. Therefore, when electroless plating is performed after the catalyst is adhered, voids are not generated and uniform plating can be performed.

前記分子内に貴金属を捕捉しえる官能基を有する化合物として好ましいものは、シランカップリング剤であり、アゾール系化合物またはアミン化合物とエポキシ系化合物との反応により得られるものが挙げられる。
アゾール系化合物としては、イミダゾール、オキサゾール、チアゾール、セレナゾール、ピラゾール、イソオキサゾール、イソチアゾール、トリアゾール、オキサジアゾール、チアジアゾール、テトラゾール、オキサトリアゾール、チアトリアゾール、ベンダゾール、インダゾール、ベンズイミダゾール、ベンゾトリアゾールなどが挙げられる。これらに制限されるものではないが、イミダゾールが特に好ましい。
A preferable compound having a functional group capable of capturing a noble metal in the molecule is a silane coupling agent, and examples thereof include those obtained by a reaction between an azole compound or an amine compound and an epoxy compound.
Examples of azole compounds include imidazole, oxazole, thiazole, selenazole, pyrazole, isoxazole, isothiazole, triazole, oxadiazole, thiadiazole, tetrazole, oxatriazole, thiatriazole, benzazole, indazole, benzimidazole, and benzotriazole. It is done. Although not limited thereto, imidazole is particularly preferable.

また、アミン化合物としては、例えばプロピルアミン等の飽和炭化水素アミン、ビニルアミン等の不飽和炭化水素アミン、フェニルアミン等の芳香族アミン等を挙げることができる。   Examples of the amine compound include saturated hydrocarbon amines such as propylamine, unsaturated hydrocarbon amines such as vinylamine, and aromatic amines such as phenylamine.

また前記シランカップリング剤とは、前記アゾール系化合物またはアミン化合物由来の貴金属捕捉基の他に、−SiX基を有する化合物であり、X、X、Xはアルキル基、ハロゲンやアルコキシ基などを意味し、被めっき物への固定が可能な官能基であれば良い。X、X、Xは同一でもまた異なっていても良い。Also, the a silane coupling agent, in addition to the noble metal capture group derived from the azole compound or amine compound is a compound having a -SiX 1 X 2 X 3 group, X 1, X 2, X 3 is an alkyl group It means a halogen, an alkoxy group or the like, and any functional group that can be fixed to an object to be plated. X 1 , X 2 and X 3 may be the same or different.

前記シランカップリング剤は、前記アゾール系化合物またはアミン化合物とエポキシシラン化合物を反応させることにより得ることができる。
このようなエポキシシラン化合物としては、
(式中、R1、R2は水素または炭素数が1〜3のアルキル基、nは0〜3を示す。)
で示されるエポキシカップリング剤が好ましい。
The silane coupling agent can be obtained by reacting the azole compound or amine compound with an epoxy silane compound.
As such an epoxy silane compound,
(Wherein, R 1, R 2 is hydrogen or an alkyl group having a carbon number of 1 to 3, n denotes 0 to 3.)
The epoxy coupling agent shown by these is preferable.

前記アゾール系化合物と前記エポキシ基含有シラン化合物との反応は、例えば特開平6−256358号公報に記載されている条件で行うことができる。
例えば、80〜200℃でアゾール系化合物1モルに対して0.1〜10モルのエポキシ基含有シラン化合物を滴下して5分〜2時間反応させることにより得ることができる。その際、溶媒は特に不要であるが、クロロホルム、ジオキサン、メタノール、エタノール等の有機溶媒を用いてもよい。
The reaction between the azole compound and the epoxy group-containing silane compound can be performed under the conditions described in, for example, JP-A-6-256358.
For example, it can be obtained by dropping 0.1 to 10 moles of an epoxy group-containing silane compound at 80 to 200 ° C. with respect to 1 mole of an azole compound and reacting them for 5 minutes to 2 hours. At that time, a solvent is not particularly required, but an organic solvent such as chloroform, dioxane, methanol, ethanol or the like may be used.

特に好ましい例としてイミダゾール化合物とエポキシシラン系化合物の反応を下記に示す。
(式中、R1、R2は水素または炭素数が1〜3のアルキル基、R3は水素、または炭素数1〜20のアルキル基、R4はビニル基、または炭素数1〜5のアルキル基、nは0〜3を示す。)
As a particularly preferred example, the reaction between an imidazole compound and an epoxysilane compound is shown below.
(Wherein R 1 and R 2 are hydrogen or an alkyl group having 1 to 3 carbon atoms, R 3 is hydrogen or an alkyl group having 1 to 20 carbon atoms, R 4 is a vinyl group, or 1 to 5 carbon atoms) An alkyl group, n represents 0-3.)

本発明に使用する分子内に貴金属を捕捉しえる官能基を有する化合物のその他の例としては、例えば貴金属を捕捉しえる官能基として、アミノ基、メルカプト基等を有するシランカップリング剤である、γ−アミノプロピルトリメトキシシラン、γ−アミノプロピルトリエトキシシラン、N−β(アミノエチル)γ−アミノプロピルトリメトキシシラン、N−β(アミノエチル)γ−アミノプロピルトリエトキシシラン、γ−メルカプトプロピルトリメトキシシラン等が挙げられる。   Other examples of the compound having a functional group capable of capturing a noble metal in the molecule used in the present invention include, for example, a silane coupling agent having an amino group, a mercapto group, etc. as a functional group capable of capturing a noble metal. γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-β (aminoethyl) γ-aminopropyltriethoxysilane, γ-mercaptopropyl Examples include trimethoxysilane.

貴金属化合物としては、パラジウム、銀、白金、金等の貴金属化合物、例えば、それらのハロゲン化物、水酸化物、硫酸塩、炭酸塩、カルボン酸、スルホン酸、スルフィン酸等の有機酸との塩、貴金属石鹸等を挙げることができる。特にパラジウム化合物が好ましい。パラジウム化合物としては、パラジウムイオンが供給されればよく、特に限定されるものではないが、ハロゲン化物、硫酸塩、カルボン酸塩等が好ましく用いられ、例えば、塩化パラジウム、硫酸パラジウム、酢酸パラジウム等を挙げることができる。また、従来の塩化スズなどの触媒も本発明の目的の範囲内において含有させることができる。   As the noble metal compounds, noble metal compounds such as palladium, silver, platinum, gold, for example, their halides, hydroxides, sulfates, carbonates, salts with organic acids such as carboxylic acids, sulfonic acids, sulfinic acids, A noble metal soap etc. can be mentioned. A palladium compound is particularly preferable. The palladium compound is not particularly limited as long as palladium ions are supplied, but halides, sulfates, carboxylates and the like are preferably used. For example, palladium chloride, palladium sulfate, palladium acetate and the like are used. Can be mentioned. Conventional catalysts such as tin chloride can also be included within the scope of the object of the present invention.

本発明の触媒は、上記分子内に貴金属を捕捉しえる官能基を有する化合物、貴金属化合物の溶液として使用されるが、その溶剤は、分子内に貴金属を捕捉しえる官能基を有する化合物や貴金属化合物の溶解性の点および安全性の点から水溶液が好ましい。溶解性によってはメタノール、エタノール、イソプロパノール、オクチルアルコールなどのアルコール系有機溶剤や、トルエン、キシレンなどの芳香族系有機溶剤などを適宜用いても構わない。   The catalyst of the present invention is used as a solution of a compound having a functional group capable of capturing a noble metal in the molecule or a solution of a noble metal compound, but the solvent is a compound having a functional group capable of capturing a noble metal in the molecule or a noble metal. An aqueous solution is preferable from the viewpoint of the solubility and safety of the compound. Depending on the solubility, alcohol-based organic solvents such as methanol, ethanol, isopropanol, and octyl alcohol, and aromatic organic solvents such as toluene and xylene may be used as appropriate.

触媒中の分子内に貴金属を捕捉しえる官能基を有する化合物の濃度はこれに限ったものではないが、0.001〜10重量%が好ましい。0.001重量%未満の場合、基材の表面に付着する化合物量が低くなりやすく、効果が得にくい。また、10重量%を超えると付着量が多すぎて乾燥しにくかったり、捕捉貴金属とのバランスが崩れて触媒活性発現に時間がかかり、効果が得にくくなる。   The concentration of the compound having a functional group capable of capturing a noble metal in the molecule in the catalyst is not limited to this, but is preferably 0.001 to 10% by weight. If it is less than 0.001% by weight, the amount of the compound adhering to the surface of the substrate tends to be low, and the effect is difficult to obtain. On the other hand, if the amount exceeds 10% by weight, it is difficult to dry because the amount of adhesion is too large, or the balance with the trapped noble metal is lost and it takes time to develop catalytic activity, making it difficult to obtain the effect.

また、貴金属化合物は、触媒中において、1〜1000mg/L(貴金属換算)、好ましくは10〜300mg/L(貴金属換算)の濃度で使用することができる。この範囲外でも効果は見られるが、後処理の影響から上記範囲が好ましい。   The noble metal compound can be used in the catalyst at a concentration of 1 to 1000 mg / L (in terms of noble metal), preferably 10 to 300 mg / L (in terms of noble metal). Although the effect can be seen even outside this range, the above range is preferable from the influence of post-treatment.

基材を触媒で処理する方法としては、スルーホール側壁にも均一に付与されるには、浸漬が好ましい。
本発明のスルーホールを有するプリント配線基板としては、例えば、基材にスルーホールを形成した後、定法の脱脂工程、ソフトエッチング工程を行い、次にこれまで述べてきた触媒を浸漬により付与し、常法により、銅、ニッケル等の無電解めっき層を形成したものである。触媒を付与した後は、水洗を行い、例えば10%硫酸、5%次亜リン酸ナトリウム等で、室温から70℃で1分から15分程度触媒を活性化することが好ましい。
As a method of treating the substrate with a catalyst, dipping is preferable so that the substrate is uniformly applied to the side wall of the through hole.
As a printed wiring board having a through hole of the present invention, for example, after forming a through hole in a base material, a regular degreasing step and a soft etching step are performed, and then the catalyst described so far is applied by immersion, An electroless plating layer of copper, nickel or the like is formed by a conventional method. After applying the catalyst, it is preferably washed with water and activated with, for example, 10% sulfuric acid, 5% sodium hypophosphite, etc. at room temperature to 70 ° C. for about 1 to 15 minutes.

本発明によるスルーホールを有する配線基板は、そのスルーホールが直径200μm以下、例えば直径150μmの微細スルーホール側壁においても、ボイド発生がなく、均一にめっきされたプリント配線基板となる。   The wiring board having a through hole according to the present invention is a printed wiring board that is uniformly plated without voids even on the side wall of a through hole having a diameter of 200 μm or less, for example, 150 μm.

以下、実施例により本発明を更に詳細に説明するが、本発明は実施例により限定されるものではない。   EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited by an Example.

実施例1
150μm径のスルーホールを有するプリント配線基板用積層基板を、イミダゾールシラン(イミダゾールと3−グリシドキシプロピルトリメトキシシランの反応生成物)100mg/Lと、塩化パラジウム50mg/L(Pd換算30mg/L)とを含んだ水溶液に40℃で5分浸漬した。これを活性化剤(5%ジ亜リン酸ナトリウム)で40℃で5分処理することでPdを無電解めっき活性にした。無電解銅めっき(キューポジット328、R&H製)を室温で20分行い、銅層を0.5μm膜厚つけた。1000穴のスルーホール内部を観察すると、すべてめっきされていた(図1参照)。
Example 1
A laminated substrate for a printed wiring board having a through hole with a diameter of 150 μm is prepared by adding 100 mg / L of imidazole silane (reaction product of imidazole and 3-glycidoxypropyltrimethoxysilane) and 50 mg / L of palladium chloride (30 mg / L in terms of Pd). And 5) for 4 minutes at 40 ° C. This was treated with an activator (5% sodium diphosphite) at 40 ° C. for 5 minutes to make Pd electroless plating activity. Electroless copper plating (Cuposit 328, manufactured by R & H) was performed at room temperature for 20 minutes, and a copper layer was formed to a thickness of 0.5 μm. When the inside of the 1000-hole through hole was observed, it was all plated (see FIG. 1).

実施例2
150μm径のスルーホールを有するプリント配線基板用積層基板を、アミノシラン(γ−アミノプロピルトリエトキシシラン)100mg/Lと、酢酸パラジウム100mg/L(Pd換算47mg/L)とを含んだ水溶液に40℃で5分浸漬した。これを活性化剤(5%ジ亜リン酸ナトリウム)で40℃で5分で処理することでPdを無電解めっき活性にした。無電解銅めっき(キューポジット328、R&H製)を室温で20分行い、銅層を0.5μm膜厚つけた。1000穴のスルーホール内部を観察すると、すべてめっきされていた。
Example 2
A laminated substrate for a printed wiring board having a 150 μm diameter through-hole is placed in an aqueous solution containing 100 mg / L of aminosilane (γ-aminopropyltriethoxysilane) and 100 mg / L of palladium acetate (47 mg / L in terms of Pd) at 40 ° C. Soaked for 5 minutes. This was treated with an activator (5% sodium diphosphite) at 40 ° C. for 5 minutes to make Pd electroless plating activity. Electroless copper plating (Cuposit 328, manufactured by R & H) was performed at room temperature for 20 minutes, and a copper layer was formed to a thickness of 0.5 μm. When the inside of the 1000-hole through hole was observed, it was all plated.

比較例1
150μm径のスルーホールを有するプリント配線基板用積層基板を、市販のSn−Pdコロイドプロセス(プレディップ液としてキャタプリップ404(R&H製)に浸漬、その後キャタリスト液としてキャタプリップ44(Pd換算200mg/L、R&H製)に浸漬、水洗後アクチベータ液としてアクセラレータ19E(R&H製)に浸漬)で1回処理して、無電解めっき活性にした。その後、実施例1と同様に無電解銅めっきを行った。1000穴のスルーホール内部を観察すると、100穴にボイドが見られた。図2にボイドが見られたスルーホールの断面図を示す。スルーホール中で黒く見えるところ(暗部)が無めっき部分(ボイド)である。図1で示す実施例1のスルーホール内には暗部は見当たらず無めっき部分がないが、図2で示す比較例1では、図2におけるスルーホールの上から1/4まではめっきされている(暗部は見当たらない)が、1/4を過ぎると黒い部分が次第に濃くなり、下1/4程度は黒く、ほとんど無めっき部分であることがわかる。
Comparative Example 1
A laminated substrate for a printed wiring board having a 150 μm diameter through-hole is immersed in a commercially available Sn-Pd colloid process (catliplip 404 (manufactured by R & H) as a pre-dip solution), and then cataplip 44 (200 mg / L in terms of Pd) as a catalyst solution. R & H) was immersed in accelerator 19E (made by R & H) as an activator solution after being immersed in R & H) and washed once with water to make electroless plating activity. Thereafter, electroless copper plating was performed in the same manner as in Example 1. When the inside of the 1000-hole through hole was observed, voids were seen in 100 holes. FIG. 2 shows a cross-sectional view of a through hole in which a void is seen. The portion (dark part) that appears black in the through hole is the non-plated part (void). In the through hole of Example 1 shown in FIG. 1, no dark portion is found and there is no unplated portion, but in Comparative Example 1 shown in FIG. 2, up to 1/4 of the through hole in FIG. 2 is plated. (The dark part is not found) However, when 1/4 is passed, the black part gradually becomes darker, and the lower 1/4 is black and it can be seen that the part is almost unplated.

Claims (4)

直径200μm以下の微細スルーホールを有するプリント配線基板の無電解めっきに用いる無電解めっき用触媒を含む溶液であって、該触媒が分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物と貴金属化合物とからなることを特徴とする前記無電解めっき用触媒を含む溶液。 Silane coupling agent compound containing a catalyst for electroless plating used for electroless plating of printed wiring boards having fine through-holes having a diameter of 200 μm or less, wherein the catalyst has a functional group capable of capturing a noble metal in the molecule And a noble metal compound. The solution containing the electroless plating catalyst. 前記分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物が、アゾール系またはアミン化合物とエポキシシラン系化合物との反応により得られることを特徴とする請求の範囲第1項に記載の無電解めっき用触媒を含む溶液。 Silane coupling agent compound having a functional group which can capture a noble metal in the molecule, according to claim 1, characterized in that it is obtained by a reaction between A tetrazole-based or amine compound with an epoxysilane compound A solution containing a catalyst for electroless plating. 前記分子内に貴金属を捕捉しえる官能基を有するシランカップリング剤化合物が、アミノ基を有するシランカップリング剤であることを特徴とする請求の範囲第1項に記載の無電解めっき用触媒を含む溶液。2. The electroless plating catalyst according to claim 1, wherein the silane coupling agent compound having a functional group capable of capturing a noble metal in the molecule is a silane coupling agent having an amino group. Containing solution. 前記貴金属化合物がパラジウム化合物であることを特徴とする請求の範囲第1項〜第3項のいずれか一項に記載の無電解めっき用触媒を含む溶液。  The solution containing the electroless plating catalyst according to any one of claims 1 to 3, wherein the noble metal compound is a palladium compound.
JP2007535424A 2005-09-15 2006-09-04 Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst Active JP4889045B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007535424A JP4889045B2 (en) 2005-09-15 2006-09-04 Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2005268167 2005-09-15
JP2005268167 2005-09-15
JP2007535424A JP4889045B2 (en) 2005-09-15 2006-09-04 Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst
PCT/JP2006/317461 WO2007032222A1 (en) 2005-09-15 2006-09-04 Electroless plating catalyst for printed wiring board having through hole, and printed wiring board having through hole processed by using such catalyst

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2010282574A Division JP2011091427A (en) 2005-09-15 2010-12-20 Printed circuit board having fine through hole and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPWO2007032222A1 JPWO2007032222A1 (en) 2009-03-19
JP4889045B2 true JP4889045B2 (en) 2012-02-29

Family

ID=37864821

Family Applications (2)

Application Number Title Priority Date Filing Date
JP2007535424A Active JP4889045B2 (en) 2005-09-15 2006-09-04 Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst
JP2010282574A Pending JP2011091427A (en) 2005-09-15 2010-12-20 Printed circuit board having fine through hole and method of manufacturing the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2010282574A Pending JP2011091427A (en) 2005-09-15 2010-12-20 Printed circuit board having fine through hole and method of manufacturing the same

Country Status (4)

Country Link
JP (2) JP4889045B2 (en)
KR (1) KR100970067B1 (en)
TW (1) TWI331173B (en)
WO (1) WO2007032222A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2010029635A1 (en) * 2008-09-11 2012-02-02 パイオニア株式会社 Method for forming metal wiring and electronic component provided with metal wiring

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01279764A (en) * 1988-05-06 1989-11-10 Hitachi Chem Co Ltd Catalyst for electroless plating
WO2001081652A1 (en) * 2000-04-25 2001-11-01 Nikko Materials Co., Ltd. Pretreating agent for metal plating
JP2005213576A (en) * 2004-01-29 2005-08-11 Nikko Materials Co Ltd Electroless plating pretreatment agent, electroless plating method using the same, and electroless plated object

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2988624B2 (en) * 1997-10-21 1999-12-13 日本テクノ株式会社 Plating method
JPH11204943A (en) * 1998-01-08 1999-07-30 Hitachi Ltd Electronic circuit board and manufacture thereof
JP2000212754A (en) * 1999-01-22 2000-08-02 Sony Corp Plating method, its device and plated structure
JP2001073157A (en) * 1999-09-08 2001-03-21 Sony Corp Electroless plating method and device therefor
WO2001049898A1 (en) * 2000-01-07 2001-07-12 Nikko Materials Co., Ltd. Method for metal plating, pre-treating agent, and semiconductor wafer and semiconductor device using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01279764A (en) * 1988-05-06 1989-11-10 Hitachi Chem Co Ltd Catalyst for electroless plating
WO2001081652A1 (en) * 2000-04-25 2001-11-01 Nikko Materials Co., Ltd. Pretreating agent for metal plating
JP2005213576A (en) * 2004-01-29 2005-08-11 Nikko Materials Co Ltd Electroless plating pretreatment agent, electroless plating method using the same, and electroless plated object

Also Published As

Publication number Publication date
WO2007032222A1 (en) 2007-03-22
JPWO2007032222A1 (en) 2009-03-19
KR100970067B1 (en) 2010-07-16
JP2011091427A (en) 2011-05-06
KR20080048043A (en) 2008-05-30
TW200714745A (en) 2007-04-16
TWI331173B (en) 2010-10-01

Similar Documents

Publication Publication Date Title
JP4859232B2 (en) Electroless plating pretreatment agent and copper-clad laminate for flexible substrate
KR100568386B1 (en) Metal Plating Method and Pretreatment Agent
JP6195857B2 (en) Method for metallizing non-conductive plastic surface
JP3670238B2 (en) Metal plating method, pretreatment agent, semiconductor wafer and semiconductor device using the same
JP6234429B2 (en) Method for promoting adhesion between a dielectric substrate and a metal layer
JPWO2003091476A1 (en) Semiconductor wafer having electroless plating method and metal plating layer formed thereon
JP2011058090A (en) Method for electroless nickel-palladium-gold plating, plated product, printed wiring board, interposer and semiconductor device
CN1910305B (en) Pretreating agent for electroless plating, method of electroless plating using the same and product of electroless plating
US7045461B2 (en) Metal plating method, pretreatment agent, and semiconductor wafer and semiconductor device obtained using these
JP2019019406A (en) Method of forming metal layer on light-sensitive resin
US8182873B2 (en) Method for electroless plating and metal-plated article
JP4889045B2 (en) Catalyst for electroless plating on printed wiring board having through hole, and printed wiring board having through hole processed using the catalyst
US7989029B1 (en) Reduced porosity copper deposition
JP3758532B2 (en) Pretreatment liquid for electroless nickel plating on copper or copper alloy and electroless nickel plating method
KR100568389B1 (en) Surface treatment agent, and surface-treated article and electroless nickel plating method using the same
US20070120880A1 (en) Inkjet ink composition
JP2007321189A (en) Catalytic agent for electroless plating
JP4582528B2 (en) Surface treatment agent and surface treatment product using the same
JP2003193245A (en) Pretreatment agent for planting and electroless plasting method using the same
JP2010077467A (en) Electroless plating method of polyimide resin
JP2003313670A (en) Method for forming electroless plating film
JPS6115983A (en) Catalyst for electroless plating
JP2002161389A (en) Method for improving adhesion between metal films
JP2006233307A (en) Sensitizing method and method for forming electroless plating film using the same

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100707

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20100823

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100901

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20100922

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101220

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20101228

A912 Re-examination (zenchi) completed and case transferred to appeal board

Free format text: JAPANESE INTERMEDIATE CODE: A912

Effective date: 20110318

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111114

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111209

R150 Certificate of patent or registration of utility model

Ref document number: 4889045

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141222

Year of fee payment: 3

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250