JP2013104120A - Electroless plating apparatus - Google Patents

Electroless plating apparatus Download PDF

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Publication number
JP2013104120A
JP2013104120A JP2011250435A JP2011250435A JP2013104120A JP 2013104120 A JP2013104120 A JP 2013104120A JP 2011250435 A JP2011250435 A JP 2011250435A JP 2011250435 A JP2011250435 A JP 2011250435A JP 2013104120 A JP2013104120 A JP 2013104120A
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Prior art keywords
plating
substrate
guide plate
plating solution
substrate holder
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Junichiro Tsujino
潤一郎 辻野
Tsutomu Nakada
勉 中田
Hiroyuki Kanda
裕之 神田
Makoto Kubota
誠 久保田
Junko Mine
潤子 嶺
Kenichiro Arai
健一郎 新居
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Ebara Corp
Dainippon Screen Manufacturing Co Ltd
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Ebara Corp
Dainippon Screen Manufacturing Co Ltd
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Priority to JP2011250435A priority Critical patent/JP2013104120A/en
Priority to TW101142384A priority patent/TWI485286B/en
Priority to US13/677,388 priority patent/US9293364B2/en
Priority to KR1020120129552A priority patent/KR101391533B1/en
Publication of JP2013104120A publication Critical patent/JP2013104120A/en
Priority to KR1020130133516A priority patent/KR20130132710A/en
Priority to US15/043,425 priority patent/US20160160352A1/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To flow a plating solution more uniformly over the whole region of a substrate surface by a relatively simple configuration despite using a high-productivity batch processing method to form a plating film that has improved in-plane uniformity of a film thickness and a film shape.SOLUTION: An electroless plating apparatus includes: a plating tank 80 that stores a plating solution while forming an upward flow of the plating solution thereinside; a substrate holder 84 that holds a plurality of substrates W in parallel in a vertical direction and immerses the substrates into the plating solution in the plating tank 80; and a plurality of guide plates 150, 152 that respectively surround the peripheries of the substrates W that are held by the substrate holder 84 and immersed into the plating solution, and form plating solution flows continuous to plating solution flows directing along substrate surfaces in the outer peripheries of the respective substrates W.

Description

本発明は、無電解めっき装置に係り、特に生産性の高いバッチ処理方式を採用しながら、半導体ウェーハ等の基板の表面により均一な処理を安定して行うことができるようにした無電解めっき装置に関する。   The present invention relates to an electroless plating apparatus, and in particular, an electroless plating apparatus capable of stably performing uniform processing on the surface of a substrate such as a semiconductor wafer while employing a highly productive batch processing method. About.

半導体チップ間の電気的な接続を行う3次元実装として、例えば、図1に示すように、CPU10の所定位置に設けたマイクロバンプ12と、メモリ14の所定位置に設けたマイクロバンプ16を共に電極として用い、マイクロバンプ(電極)12,16を互いに接合することが提案されている。   For example, as shown in FIG. 1, for example, as shown in FIG. 1, the micro bump 12 provided at a predetermined position of the CPU 10 and the micro bump 16 provided at a predetermined position of the memory 14 are both electrodes as the three-dimensional mounting for electrically connecting the semiconductor chips. It is proposed that the microbumps (electrodes) 12 and 16 are joined to each other.

メモリ14に設けたマイクロバンプ16は、例えばCu−Snからなる。CPU10に設けたマイクロバンプ12は、例えばAlまたはCuからなるバンプパッド18の表面に、例えば2〜10μmのNiめっき膜20を成膜し、このNiめっき膜20の表面に、例えば50〜200nmのAuめっき膜22を成膜して形成される。Auめっき膜22は、マイクロバンプ12,16の接合時に、例えばCu−Snからなるマイクロバンプ16へ拡散する。そのため、Auめっき膜22自身は、接合に影響しないが、Niめっき膜20の表面の酸化を防止して接合強度を保つ役割を持つ。   The micro bumps 16 provided in the memory 14 are made of, for example, Cu—Sn. For example, the microbump 12 provided in the CPU 10 has a Ni plating film 20 of 2 to 10 μm formed on the surface of the bump pad 18 made of, for example, Al or Cu, and the surface of the Ni plating film 20 has a thickness of 50 to 200 nm, for example. An Au plating film 22 is formed. The Au plating film 22 diffuses into the micro bumps 16 made of, for example, Cu—Sn when the micro bumps 12 and 16 are joined. Therefore, the Au plating film 22 itself does not affect the bonding, but has a role of preventing the oxidation of the surface of the Ni plating film 20 and maintaining the bonding strength.

また、TSV(Through Silicon Via)配線接続においても、図2に示すように、TSV30の表面側にNiめっき膜32とAuめっき膜34とを順次積層して形成した表面バンプ36と、TSV30の裏面側に形成した裏面バンプ38とを互いに接合することが提案されている。   Also in TSV (Through Silicon Via) wiring connection, as shown in FIG. 2, the surface bump 36 formed by sequentially laminating the Ni plating film 32 and the Au plating film 34 on the surface side of the TSV 30, and the back surface of the TSV 30 It has been proposed to join the back bumps 38 formed on the side.

上記のような、Niめっき膜20,32やAuめっき膜22,34を成膜する手法として、電解めっきに代わって、無電解めっきの採用が検討されている。また、NiやAuの他に、無電解めっき可能なCo,Pd,Pt,Cu,Sn,Ag,Rh,Ru等の単体材料および複合材料からなるめっき膜にあっても、電解めっきに代わって、無電解めっきの採用が検討されている。   As a technique for forming the Ni plating films 20 and 32 and the Au plating films 22 and 34 as described above, the use of electroless plating instead of electrolytic plating has been studied. Further, in addition to Ni and Au, in the case of plating films made of simple materials and composite materials such as Co, Pd, Pt, Cu, Sn, Ag, Rh, and Ru that can be electrolessly plated, instead of electrolytic plating. Adoption of electroless plating has been studied.

図1に示す、マイクロバンプ12の下地金属(バンプパッド18)には、AlやCu等が多く使われている。AlやCuは、Fe,Co,Ni,Pd,Pt等のような触媒金属ではない。このため、めっき前処理として、下地金属がAlの場合はジンケート処理が、下地金属がCuの場合はPd触媒付与処理(または初期通電)が一般に行われる。Al表面のジンケート処理では、一般に、置換めっきによってAl表面に亜鉛を付与する。無電解めっきに際して、亜鉛は、無電解めっき可能な触媒金属に置換される。   As the base metal (bump pad 18) of the micro bump 12 shown in FIG. Al and Cu are not catalytic metals such as Fe, Co, Ni, Pd, Pt and the like. For this reason, as a pretreatment for plating, a zincate process is generally performed when the base metal is Al, and a Pd catalyst application process (or initial energization) is performed when the base metal is Cu. In the zincate treatment on the Al surface, zinc is generally applied to the Al surface by displacement plating. In the electroless plating, zinc is replaced with a catalyst metal that can be electrolessly plated.

無電解めっき装置は、一般に、基板を一枚ずつ処理する枚葉処理方式を採用した無電解めっき装置と、複数枚の基板を同時に保持して処理するバッチ処理方式を採用した無電解めっき装置に大別される。無電解めっきのめっきレートは、一般に1〜20μm/sで、電解めっきのめっきレートと比較して格段に遅い。このため、無電解めっきをバンプ形成等の多大な時間を要する処理に適用する場合には、枚葉処理方式よりバッチ処理方式を検討するのが一般的である。バッチ処理方式の無電解めっき装置は、同一フットプリントでのスループットが枚葉処理方式のものに比べて非常に高いという利点がある。   Electroless plating equipment is generally classified into electroless plating equipment that employs a single wafer processing system that processes substrates one by one and electroless plating equipment that employs a batch processing system that holds and processes multiple substrates simultaneously. Broadly divided. The plating rate of electroless plating is generally 1 to 20 μm / s, which is much slower than the plating rate of electrolytic plating. For this reason, when applying electroless plating to a process that requires a great amount of time such as bump formation, it is common to consider a batch processing method rather than a single wafer processing method. The batch processing type electroless plating apparatus has an advantage that the throughput in the same footprint is very high as compared with the single wafer processing type.

バッチ処理方式を採用した基板処理装置として、出願人は、複数枚の基板を保持して処理槽内の処理液に浸漬させる基板ホルダを、複数枚の基板を保持したまま処理槽内の処理液中で回転させるようにしたものを提案している(特許文献1参照)。また、平板状の被めっき物表面に、均一な液流動を生じさせる無電解めっき槽として、被めっき物の両側に配置され同一方向に回転することにより被めっき物と案内板との間にめっき液の流れを形成する一対のインペラーを備え、このインペラーの回転方向を周期的に反転させるようにしたものが提案されている(特許文献2参照)。   As a substrate processing apparatus adopting a batch processing method, the applicant applies a substrate holder for holding a plurality of substrates and immersing them in a processing solution in the processing tank, and a processing liquid in the processing tank while holding the plurality of substrates. The thing which was made to rotate in is proposed (refer patent document 1). Also, as an electroless plating tank that generates a uniform liquid flow on the surface of the plate-shaped object, plating is arranged between the object to be plated and the guide plate by rotating in the same direction placed on both sides of the object to be plated. A pair of impellers that form a liquid flow is proposed, and the rotation direction of the impellers is periodically reversed (see Patent Document 2).

特開2009−57593号公報JP 2009-57593 A 特開平5−311450号公報JP-A-5-31450

無電解めっきでは、被めっき物としての基板の表面に沿っためっき液の流れの状態が、基板の表面に形成されるめっき膜の膜厚や膜形状に大きく影響することが知られている。   In electroless plating, it is known that the state of the flow of a plating solution along the surface of a substrate as an object to be plated greatly affects the film thickness and film shape of a plating film formed on the surface of the substrate.

従来のバッチ処理方式を採用した無電解めっき装置としては、図3に示すように、側板40に水平に設けた複数の支持棒42で複数枚の基板Wを下方から支持して鉛直方向に並列に保持する基板ホルダ44を備え、図示しないめっき槽内を上向きに流れるめっき液中に、基板ホルダ44で保持した複数枚の基板を同時に浸漬させるようにしたものが広く知られている。   As shown in FIG. 3, the electroless plating apparatus adopting the conventional batch processing method supports a plurality of substrates W from below by a plurality of support bars 42 provided horizontally on the side plate 40, and is arranged in parallel in the vertical direction. It is widely known that a plurality of substrates held by the substrate holder 44 are simultaneously immersed in a plating solution flowing upward in a plating tank (not shown).

このように、上向きに流れるめっき液中に基板ホルダ44で鉛直方向に並列に保持した複数枚の基板Wを同時に浸漬させると、図4に示すように、基板Wの下部にあっては、基板Wとの衝突によって基板から離れる方向に向かうめっき液の流れが、基板Wの上部にあっては、めっき液の回り込みによって、互いに近づく方向に向かうめっき液の流れがそれぞれ生じる。このように、基板Wの外周部でめっき液の流れに乱れが生じると、基板Wの表面に形成されるめっき膜の膜厚や膜形状が基板の中心部と外周部で異なってしまう。   As described above, when a plurality of substrates W held in parallel in the vertical direction by the substrate holder 44 are simultaneously immersed in the plating solution flowing upward, as shown in FIG. The flow of the plating solution that moves away from the substrate due to the collision with W occurs in the upper part of the substrate W, and the flow of the plating solution that moves toward each other occurs due to the wraparound of the plating solution. Thus, when the flow of the plating solution is disturbed at the outer peripheral portion of the substrate W, the film thickness and film shape of the plating film formed on the surface of the substrate W are different between the central portion and the outer peripheral portion of the substrate.

本発明は、上記事情に鑑みて為されたもので、生産性の高いバッチ処理方式を採用しながら、比較的簡単な構成で、基板の表面の全域に亘ってめっき液がより均一に流れるようにして、膜厚や膜形状の面内均一性を高めためっき膜を形成できるようにした無電解めっき装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and the plating solution flows more uniformly over the entire surface of the substrate with a relatively simple configuration while adopting a highly productive batch processing method. Thus, an object of the present invention is to provide an electroless plating apparatus capable of forming a plating film with improved in-plane uniformity of film thickness and film shape.

請求項1に記載の発明は、内部に上方に向かうめっき液の流れを形成しつつめっき液を保持するめっき槽と、複数枚の基板を鉛直方向に並列に保持して前記めっき槽内のめっき液に浸漬させる基板ホルダと、前記基板ホルダで保持しためっき液に浸漬させた各基板の外周部をそれぞれ囲繞して、各基板の外周部に基板表面に沿っためっき液の流れと連続するめっき液の流れを形成する複数枚のガイド板を有することを特徴とする無電解めっき装置である。   According to the first aspect of the present invention, there is provided a plating tank for holding a plating solution while forming a flow of an upward plating solution inside, and plating in the plating tank by holding a plurality of substrates in parallel in the vertical direction. A substrate holder to be immersed in the solution, and a peripheral portion of each substrate immersed in the plating solution held by the substrate holder, and plating that is continuous with the flow of the plating solution along the substrate surface on the outer periphery of each substrate An electroless plating apparatus having a plurality of guide plates for forming a liquid flow.

このように、めっき液に浸漬させた基板の外周部に基板表面に沿っためっき液の流れと連続するめっき液の流れを形成することで、基板の外周部にめっき液の流れに乱れが生じることを防止して、基板の表面に、膜厚や膜形状のより面内均一性を高めためっき膜を形成することができる。   Thus, by forming a plating solution flow that is continuous with the plating solution flow along the substrate surface at the outer peripheral portion of the substrate immersed in the plating solution, the plating solution flow is disturbed at the outer peripheral portion of the substrate. This can be prevented, and a plating film with improved in-plane uniformity of film thickness and film shape can be formed on the surface of the substrate.

請求項2に記載の発明は、前記基板ホルダで保持される基板と該基板の周囲を囲繞する前記ガイド板との距離は、1〜10mmであることを特徴とする請求項1記載の無電解めっき装置である。
前記基板ホルダで保持される基板と該基板の周囲を囲繞する前記ガイド板との距離は、可能な限り狭いことが望ましいが、加工精度等を考慮すると、1〜10mmであることが好ましい。
According to a second aspect of the present invention, the distance between the substrate held by the substrate holder and the guide plate surrounding the substrate is 1 to 10 mm. It is a plating device.
The distance between the substrate held by the substrate holder and the guide plate surrounding the periphery of the substrate is preferably as narrow as possible, but is preferably 1 to 10 mm in consideration of processing accuracy and the like.

請求項3に記載の発明は、前記複数枚のガイド板は、互いに隣接するガイド板間に配置されて鉛直方向に直線状に延びる複数枚の連結板で互いに平面格子状に連結されていることを特徴とする請求項1または2記載の無電解めっき装置である。
これにより、基板の側方を上方に向かって流れるめっき液の流れに乱れが生じること連結板で防止しつつ、ガイド板自体の強度及び安定性を増大させることができる。
According to a third aspect of the present invention, the plurality of guide plates are connected to each other in a planar grid pattern by a plurality of connecting plates arranged between adjacent guide plates and extending linearly in the vertical direction. An electroless plating apparatus according to claim 1 or 2, wherein
Thereby, it is possible to increase the strength and stability of the guide plate itself while preventing the turbulence in the flow of the plating solution flowing upward on the side of the substrate with the connecting plate.

請求項4に記載の発明は、前記ガイド板は、基板ホルダで保持してめっき槽内のめっき液に浸漬させた基板の下半分の周囲を囲繞する下側ガイド板と、基板の上半分の周囲を囲繞する上側ガイド板とからなり、前記下側ガイド板は前記基板ホルダに、前記上側ガイド板は前記めっき槽の上端開口部を開閉する蓋体の裏面にそれぞれ取り付けられていることを特徴とする請求項1乃至3のいずれか一項に記載の無電解めっき装置である。   According to a fourth aspect of the present invention, the guide plate is held by the substrate holder and surrounded by the lower half of the lower half of the substrate immersed in the plating solution in the plating tank, and the upper half of the upper half of the substrate. The lower guide plate is attached to the substrate holder, and the upper guide plate is attached to the back surface of the lid that opens and closes the upper end opening of the plating tank. The electroless plating apparatus according to any one of claims 1 to 3.

請求項5に記載の発明は、前記ガイド板は、基板ホルダで保持してめっき槽内のめっき液に浸漬させた基板の下半分の周囲を囲繞する下側ガイド板と、基板の上半分の周囲を囲繞する上側ガイド板とからなり、前記下側ガイド板は前記めっき槽の内部に、前記上側ガイド板は前記めっき槽の上端開口部を開閉する蓋体の裏面にそれぞれ取り付けられていることを特徴とする請求項1乃至3のいずれか一項に記載の無電解めっき装置である。   The invention according to claim 5 is characterized in that the guide plate is held by the substrate holder and surrounded by the lower half of the lower half of the substrate immersed in the plating solution in the plating tank, and the upper half of the upper half of the substrate. The lower guide plate is attached to the inside of the plating tank, and the upper guide plate is attached to the back surface of the lid that opens and closes the upper end opening of the plating tank. The electroless plating apparatus according to any one of claims 1 to 3.

本発明の無電解めっき装置によれば、基板の外周部に基板表面に沿っためっき液の流れと連続するめっき液の流れを形成することで、基板の外周部にめっき液の流れに乱れが生じることを防止して、基板の表面に、膜厚や膜形状のより面内均一性を高めためっき膜を形成することができる。   According to the electroless plating apparatus of the present invention, the flow of the plating solution that is continuous with the flow of the plating solution along the substrate surface is formed on the outer peripheral portion of the substrate, so that the flow of the plating solution is disturbed on the outer peripheral portion of the substrate. It is possible to prevent the occurrence and to form a plating film with higher in-plane uniformity of film thickness and film shape on the surface of the substrate.

マイクロバンプの接合例を示す断面図である。It is sectional drawing which shows the example of joining of a micro bump. TSV配線の接続例を示す断面図である。It is sectional drawing which shows the example of a connection of TSV wiring. 従来の無電解めっき装置に使用されている基板ホルダを示す斜視図である。It is a perspective view which shows the substrate holder currently used for the conventional electroless-plating apparatus. 上向きに流れるめっき液中に、図3で示す基板ホルダで保持した複数枚の基板を同時に浸漬させた時のめっき液の流れを示す図である。It is a figure which shows the flow of a plating solution when the several board | substrate hold | maintained with the board | substrate holder shown in FIG. 3 is simultaneously immersed in the plating solution which flows upward. バンプパッドの表面にNiめっき膜及びAuめっき膜を無電解めっきで形成する例を工程順に示す断面図である。It is sectional drawing which shows the example which forms Ni plating film and Au plating film on the surface of a bump pad by electroless plating in order of a process. 本発明の実施形態の無電解めっき装置を有する無電解めっきシステムの全体を示す縦断正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal front view which shows the whole electroless-plating system which has the electroless-plating apparatus of embodiment of this invention. 無電解Niめっき装置のNiめっき槽と基板ホルダを示す概略縦断正面図である。It is a schematic longitudinal front view which shows the Ni plating tank and substrate holder of an electroless Ni plating apparatus. 無電解Niめっき装置のNiめっき槽と基板ホルダを示す概略側断面図であるIt is a schematic sectional side view which shows the Ni plating tank and substrate holder of an electroless Ni plating apparatus. Niめっき槽の上端開口部を開閉する蓋体を示す模式図である。It is a schematic diagram which shows the cover body which opens and closes the upper end opening part of Ni plating tank. 上向きに流れるめっき液中に、下側ガイド板及び上側ガイド板で周囲を囲繞した複数枚の基板を同時に浸漬させた時のめっき液の流れを示す図である。It is a figure which shows the flow of a plating solution when the several board | substrate which surrounded the periphery with the lower side guide plate and the upper side guide plate was immersed simultaneously in the plating solution which flows upward. 図6に示す無電解めっきシステムによる一連の処理を示すブロック図である。It is a block diagram which shows a series of processes by the electroless-plating system shown in FIG. 無電解Niめっき装置の他のNiめっき槽と基板ホルダを示す概略縦断正面図である。It is a schematic longitudinal front view which shows the other Ni plating tank and substrate holder of an electroless Ni plating apparatus. 無電解Niめっき装置の他のNiめっき槽と基板ホルダを示す概略側断面図である。It is a schematic sectional side view which shows the other Ni plating tank and substrate holder of an electroless Ni plating apparatus. 下側ガイド板の連結板で連結して構成した平面格子状の下側ガイド板構造体を示す斜視図である。It is a perspective view which shows the planar lattice-like lower guide plate structure comprised by connecting with the connection plate of the lower guide plate. 下側ガイド板構造体と上側ガイド板構造体で基板の周囲を囲繞した状態を示す正面図である。It is a front view which shows the state which enclosed the circumference | surroundings of the board | substrate with the lower side guide plate structure and the upper side guide plate structure. 図15のB−B線断面図である。It is the BB sectional drawing of FIG.

以下、本発明の実施形態を図面を参照して説明する。なお、以下の例において、同一または相当部材には、同一符号を付して重複した説明を省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following examples, the same or corresponding members are denoted by the same reference numerals, and redundant description is omitted.

以下の例では、図5(a)に示すように、例えば直径Dが数μmのAlからなるバンプパッド50を設けた半導体ウェーハ等の基板Wを用意する。そして、図5(b)に示すように、この基板Wの表面に、めっき前処理としてのジンケート処理を行って、バンプパッド50の表面に置換めっきにより亜鉛めっき膜52を形成し、この亜鉛めっき膜52の表面に、無電解めっきによって、例えば1.6μmのNiめっき膜54を形成し、このNiめっき膜54の表面に、無電解めっき(置換めっき)によって、例えば0.1μmのAuめっき膜56を形成するようにしている。   In the following example, as shown in FIG. 5A, a substrate W such as a semiconductor wafer provided with a bump pad 50 made of Al having a diameter D of several μm, for example, is prepared. Then, as shown in FIG. 5B, a zincate process as a pre-plating process is performed on the surface of the substrate W, and a zinc plating film 52 is formed on the surface of the bump pad 50 by displacement plating. An Ni plating film 54 of 1.6 μm, for example, is formed on the surface of the film 52 by electroless plating, and an Au plating film of 0.1 μm, for example, is formed on the surface of the Ni plating film 54 by electroless plating (substitution plating). 56 is formed.

図6は、本発明の実施形態の無電解めっき装置を有する無電解めっきシステムの全体を示す縦断正面図である。図6に示すように、この無電解めっきシステムは、前洗浄槽60、水洗槽62及び基板ホルダ64を有する前洗浄装置66と、ジンケート処理槽70、水洗槽72及び基板ホルダ74を有するジンケート処理装置76と、Niめっき槽80、水洗槽82及び基板ホルダ84を有する、本発明の実施形態の無電解Niめっき装置86と、Auめっき槽90、水洗槽92及び基板ホルダ94を有する、本発明の他の実施形態の無電解Auめっき装置96と、乾燥ユニット100及び基板ホルダ102を有する乾燥装置104を備えている。   FIG. 6 is a longitudinal sectional front view showing the entire electroless plating system having the electroless plating apparatus according to the embodiment of the present invention. As shown in FIG. 6, this electroless plating system includes a pre-cleaning device 66 having a pre-cleaning tank 60, a water-washing tank 62 and a substrate holder 64, a zincate processing tank 70, a water-washing tank 72 and a substrate holder 74. The present invention has an apparatus 76, an electroless Ni plating apparatus 86 according to an embodiment of the present invention having an Ni plating tank 80, a water washing tank 82, and a substrate holder 84, an Au plating tank 90, a water washing tank 92, and a substrate holder 94. An electroless Au plating apparatus 96 according to another embodiment, and a drying apparatus 104 having a drying unit 100 and a substrate holder 102 are provided.

更に、これらの基板ホルダ64,74,84,94,104と平行に、ガイド106に沿って走行自在な基板保持具108を有し、複数枚の基板を同時に搬送して各基板ホルダ64,74,84,94,104との間で複数枚の基板の受け渡しを行う装置間基板搬送装置110が配置されている。   Furthermore, a substrate holder 108 that can run along the guide 106 is provided in parallel with the substrate holders 64, 74, 84, 94, 104, and a plurality of substrates are conveyed simultaneously to each substrate holder 64, 74. , 84, 94, 104 is provided with an inter-device substrate transfer device 110 for transferring a plurality of substrates.

図7は、無電解Niめっき装置86のNiめっき槽80と基板ホルダ84を示す概略縦断正面図で、図8は、同じく概略側断面図である。図7及び図8に示すように、Niめっき槽80は、処理液としてのNiめっき液を内部に保持する、内槽120と外槽122とを有しており、内槽120と外槽122との間にオーバフロー槽124が形成されている。Niめっき槽80のオーバフロー槽124の底部には、ポンプ126、温度調整器128及びフィルタ130を介装しためっき液循環ライン132の一端が接続され、このめっき液循環ライン132の他端は、内槽120の底部に接続されている。更に、内槽120の底部には、めっき液の流れを整える整流板134が配置されている。   FIG. 7 is a schematic longitudinal sectional front view showing the Ni plating tank 80 and the substrate holder 84 of the electroless Ni plating apparatus 86, and FIG. 8 is also a schematic sectional side view. As shown in FIGS. 7 and 8, the Ni plating tank 80 includes an inner tank 120 and an outer tank 122 that hold an Ni plating solution as a processing solution therein, and the inner tank 120 and the outer tank 122. An overflow tank 124 is formed between the two. One end of a plating solution circulation line 132 including a pump 126, a temperature regulator 128 and a filter 130 is connected to the bottom of the overflow vessel 124 of the Ni plating vessel 80. The other end of the plating solution circulation line 132 is It is connected to the bottom of the tank 120. Furthermore, a rectifying plate 134 that arranges the flow of the plating solution is disposed at the bottom of the inner tank 120.

これによって、Niめっき槽80内のNiめっき液(処理液)は、ポンプ126の駆動に伴って、フィルタ130でフィルタリングされ、温度調整器128で、例えば80℃に温度が調整されながら、内槽120の内部を上方に向かって流れ、オーバフロー槽124内に流入して循環するようになっている。   As a result, the Ni plating solution (treatment solution) in the Ni plating tank 80 is filtered by the filter 130 as the pump 126 is driven, and the temperature is adjusted to, for example, 80 ° C. by the temperature regulator 128 while the inner tank is being adjusted. It flows through the inside of 120 upward, flows into the overflow tank 124 and circulates.

Auめっき槽90は、処理液としてAuめっき液を使用し、Auめっき液(処理液)の温度を、例えば75℃に調整する以外は、Niめっき槽80とほぼ同様な構成を有している。前洗浄槽60は、処理液として、例えば一般に温度を調整する必要がない(常温で使用される)硝酸(前洗浄液)を使用し、温度調整器128を省略している点以外は、Niめっき槽80とほぼ同様な構成を有している。ジンケート処理槽70は、処理液として、例えば水酸化ナトリウムベースの酸化亜鉛含有液からなるジンケート液を使用し、ジンケート液(処理液)の温度を、例えば50℃に調整する以外は、Niめっき槽80とほぼ同様な構成を有している。   The Au plating tank 90 has substantially the same configuration as the Ni plating tank 80 except that an Au plating liquid is used as the processing liquid and the temperature of the Au plating liquid (processing liquid) is adjusted to, for example, 75 ° C. . The pre-cleaning tank 60 uses, for example, nitric acid (pre-cleaning liquid) that does not generally require adjustment of the temperature (used at room temperature) as the processing liquid, and omits the temperature controller 128. It has substantially the same configuration as the tank 80. The zincate treatment tank 70 is a Ni plating tank except that, for example, a zincate liquid composed of a sodium hydroxide-based zinc oxide-containing liquid is used as the treatment liquid, and the temperature of the zincate liquid (treatment liquid) is adjusted to 50 ° C., for example. The configuration is almost the same as 80.

Niめっき槽80の上端には、Niめっき槽80の上端開口部を閉塞して、内部に保持したNiめっき液の蒸発を防止する蓋体136がヒンジ138(図9参照)を介して開閉自在に設けられている。このことは、Auめっき槽90にあっても同様である。   At the upper end of the Ni plating tank 80, a lid 136 that closes the upper end opening of the Ni plating tank 80 and prevents evaporation of the Ni plating solution held therein can be opened and closed via a hinge 138 (see FIG. 9). Is provided. The same applies to the Au plating tank 90.

図7及び図8に示すように、無電解Niめっき装置86の基板ホルダ84は、側板140と、側板140に一端を取り付けて水平方向に延び、複数枚の基板Wを下方から支持する複数の支持棒142を有している。これにより、基板ホルダ84は、基板Wを支持棒142で下方から支持して、複数枚(例えば50枚)の基板Wを並列に保持するようになっている。   As shown in FIGS. 7 and 8, the substrate holder 84 of the electroless Ni plating apparatus 86 includes a side plate 140 and a plurality of side plates 140 that have one end attached to the side plate 140 and extend in the horizontal direction and support a plurality of substrates W from below. A support bar 142 is provided. Thereby, the substrate holder 84 supports the substrate W from below with the support rod 142 and holds a plurality of (for example, 50) substrates W in parallel.

支持棒142で下部を支持して基板ホルダ84で保持される基板Wの下半分の周囲を囲繞する位置には、下側ガイド板150が支持棒に142に固定して配置されている。下側ガイド板150の厚さは、基板Wの厚さと同じ厚さに設定され、これによって、基板ホルダ84で保持される基板Wの表面及び裏面と該基板Wの下半分の周囲を囲繞する下側ガイド150の表面及び裏面は、共に同一平面をなすようになっている。   A lower guide plate 150 is fixed to the support rod 142 at a position surrounding the lower half of the substrate W supported by the support rod 142 and supported by the substrate holder 84. The thickness of the lower guide plate 150 is set to the same thickness as the substrate W, and thereby surrounds the front and back surfaces of the substrate W held by the substrate holder 84 and the periphery of the lower half of the substrate W. The front and back surfaces of the lower guide 150 are both flush with each other.

また、基板ホルダ84で保持される基板Wと該基板Wの下半分の周囲を囲繞する下側ガイド板150との距離は、1〜10mmに設定されている。この基板ホルダ84で保持される基板Wと該基板Wの下半分の周囲を囲繞する下側ガイド板150との距離は、可能な限り狭いことが望ましいが、加工精度等を考慮すると、1〜10mmであることが好ましい。   The distance between the substrate W held by the substrate holder 84 and the lower guide plate 150 surrounding the lower half of the substrate W is set to 1 to 10 mm. The distance between the substrate W held by the substrate holder 84 and the lower guide plate 150 surrounding the lower half of the substrate W is preferably as small as possible. 10 mm is preferable.

一方、Niめっき槽80の上端開口部を開閉する蓋体136の裏面には、図9に模式図で示すように、蓋体136を閉めた時に、基板ホルダ84で保持される基板Wの上半分の周囲を囲繞する位置に位置して、上側ガイド板152が取り付けられている。この上側ガイド板152の厚さは、下側ガイド板150と同様に、基板Wの厚さと同じ厚さに設定され、また基板ホルダ84で保持される基板Wと該基板Wの上半分の周囲を囲繞する上側ガイド板152との距離は、1〜10mmに設定されている。このことは、Auめっき槽90にあっても同様である。   On the other hand, on the back surface of the lid 136 that opens and closes the upper end opening of the Ni plating tank 80, as shown schematically in FIG. 9, when the lid 136 is closed, the top of the substrate W held by the substrate holder 84 is displayed. An upper guide plate 152 is attached at a position surrounding the periphery of the half. The thickness of the upper guide plate 152 is set to the same thickness as that of the substrate W, similarly to the lower guide plate 150, and the substrate W held by the substrate holder 84 and the periphery of the upper half of the substrate W The distance from the upper guide plate 152 that surrounds is set to 1 to 10 mm. The same applies to the Au plating tank 90.

これによって、基板ホルダ84で保持した複数枚の基板WをNiめっき槽80内のめっき液に浸漬させて、蓋体136を閉じた時に、基板ホルダ84で保持した各基板Wは、下側ガイド板150と上側ガイド板152で、そのほぼ全周囲を囲繞されるようになっている。   Thus, when the plurality of substrates W held by the substrate holder 84 are immersed in the plating solution in the Ni plating tank 80 and the lid 136 is closed, each substrate W held by the substrate holder 84 is moved to the lower guide. The plate 150 and the upper guide plate 152 surround the entire periphery.

このように、基板ホルダ84で保持した各基板Wのほぼ全周囲を下側ガイド板150と上側ガイド板152で囲繞した状態で、Niめっき槽80の内部にめっき液の上向きの流れを形成すると、図10に示すように、各基板Wの外周部に基板Wの表面に沿っためっき液の流れと連続するめっき液の流れが形成される。つまり、下側ガイド板150の下部にあっては、下側ガイド板150との衝突によって基板から離れる方向に向かうめっき液の流れが、上側ガイド板152の上部にあっては、めっき液の回り込みによって、互いに近づく方向に向かうめっき液の流れがそれぞれ生じるが、これらのめっき液の流れは、基板Wの外周部に沿って流れるめっき液の流れに影響を与えることはない。   As described above, when an upward flow of the plating solution is formed inside the Ni plating tank 80 in a state where the entire periphery of each substrate W held by the substrate holder 84 is surrounded by the lower guide plate 150 and the upper guide plate 152. As shown in FIG. 10, a plating solution flow continuous with the plating solution flow along the surface of the substrate W is formed on the outer peripheral portion of each substrate W. That is, at the lower part of the lower guide plate 150, the flow of the plating solution toward the direction away from the substrate due to the collision with the lower guide plate 150, and when the upper part of the upper guide plate 152, the plating solution wraps around. However, the flow of the plating solution in a direction approaching each other occurs, but the flow of these plating solutions does not affect the flow of the plating solution flowing along the outer peripheral portion of the substrate W.

このように、基板Wの外周部に基板Wの表面に沿っためっき液の流れと連続するめっき液の流れを形成することで、基板の外周部にめっき液の流れに乱れが生じることを防止して、基板Wの表面に、膜厚や膜形状のより面内均一性を高めためっき膜を形成することができる。   Thus, by forming a plating solution flow that is continuous with the plating solution flow along the surface of the substrate W at the outer peripheral portion of the substrate W, it is possible to prevent disturbance of the plating solution flow at the outer peripheral portion of the substrate. Thus, a plating film with higher in-plane uniformity of film thickness and film shape can be formed on the surface of the substrate W.

なお、無電解Auめっき装置96の基板ホルダ94も、上記無電解Niめっき装置86の基板ホルダ84と同様な構成を有している。前洗浄装置66の基板ホルダ64、ジンケート処理装置76の基板ホルダ74、及び乾燥装置104の基板ホルダ102は、上記無電解Niめっき装置86の基板ホルダ84の下側ガイド板150を除いた構成を有している。   The substrate holder 94 of the electroless Au plating apparatus 96 has the same configuration as the substrate holder 84 of the electroless Ni plating apparatus 86. The substrate holder 64 of the pre-cleaning device 66, the substrate holder 74 of the zincate processing device 76, and the substrate holder 102 of the drying device 104 have a configuration excluding the lower guide plate 150 of the substrate holder 84 of the electroless Ni plating device 86. Have.

次に、この例の無電解めっきシステムによる、一連の処理を、図11を参照して説明する。   Next, a series of processes by the electroless plating system of this example will be described with reference to FIG.

先ず、前洗浄装置66の基板ホルダ64は、装置間基板搬送装置110の基板保持部108から複数枚の基板Wを同時に受け取って鉛直方向に保持する。そして、基板ホルダ64を下降させて、基板ホルダ64で保持した複数枚の基板Wを、前洗浄槽60内の処理液(硝酸)に、例えば1分間浸漬させ、これによって、基板Wの表面の酸化膜を除去する。   First, the substrate holder 64 of the pre-cleaning device 66 simultaneously receives a plurality of substrates W from the substrate holding unit 108 of the inter-substrate substrate transfer device 110 and holds them in the vertical direction. Then, the substrate holder 64 is lowered, and the plurality of substrates W held by the substrate holder 64 are immersed in the processing liquid (nitric acid) in the pre-cleaning tank 60 for, for example, 1 minute. The oxide film is removed.

次に、基板ホルダ64で保持した複数枚の基板Wを、前洗浄槽60内の処理液(硝酸)から引き上げ、水洗槽62の直上方に移動させる。そして、基板ホルダ64を下降させて、基板ホルダ64で保持した複数枚の基板Wを、水洗槽60内の処理液(純水)に、例えば5分間浸漬させ、これによって、基板Wの表面を水洗する。しかる後、基板ホルダ64で保持した複数枚の基板Wを、水洗槽60内の処理液(純水)から引き上げる。   Next, the plurality of substrates W held by the substrate holder 64 are pulled up from the treatment liquid (nitric acid) in the pre-cleaning tank 60 and moved directly above the washing tank 62. Then, the substrate holder 64 is lowered, and the plurality of substrates W held by the substrate holder 64 are immersed in the processing liquid (pure water) in the washing tank 60 for, for example, 5 minutes. Wash with water. Thereafter, the plurality of substrates W held by the substrate holder 64 are pulled up from the processing liquid (pure water) in the washing tank 60.

次に、基板ホルダ64で鉛直方向に保持した複数枚の基板Wを、装置間基板搬送装置110の基板保持具108を経由して、ジンケート処理装置76の基板ホルダ74に受け渡す。そして、基板ホルダ74を下降させて、基板ホルダ74で保持した複数枚の基板Wを、ジンケート処理槽70内の処理液(ジンケート液)に、例えば30秒浸漬させ、これによって、Alからなるバンプパッド50(図5参照)の表面の1回目のジンケート処理を行う。そして、基板ホルダ74で保持した複数枚の基板Wを、ジンケート処理槽70内の処理液(ジンケート液)から引き上げる。   Next, the plurality of substrates W held in the vertical direction by the substrate holder 64 are transferred to the substrate holder 74 of the zincate processing apparatus 76 via the substrate holder 108 of the inter-substrate substrate transfer apparatus 110. Then, the substrate holder 74 is lowered, and a plurality of substrates W held by the substrate holder 74 are immersed in a treatment liquid (zincate liquid) in the zincate treatment tank 70 for, for example, 30 seconds, thereby bumps made of Al. A first zincate process is performed on the surface of the pad 50 (see FIG. 5). Then, the plurality of substrates W held by the substrate holder 74 are pulled up from the processing liquid (zincate liquid) in the zincate processing tank 70.

次に、前述とほぼ同様に、基板ホルダ74で保持した複数枚の基板Wを、水洗槽72の直上方に移動させる。そして、基板ホルダ74を下降させて、基板ホルダ74で保持した複数枚の基板Wを、水洗槽72内の処理液(純水)に、例えば1分間浸漬させ、これによって、基板Wの表面を水洗する。しかる後、基板ホルダ74で保持した複数枚の基板Wを水洗槽72内の処理液(純水)から引き上げる。   Next, almost in the same manner as described above, the plurality of substrates W held by the substrate holder 74 are moved directly above the washing tank 72. Then, the substrate holder 74 is lowered, and the plurality of substrates W held by the substrate holder 74 are immersed in the treatment liquid (pure water) in the water rinsing tank 72, for example, for 1 minute, whereby the surface of the substrate W is Wash with water. Thereafter, the plurality of substrates W held by the substrate holder 74 are pulled up from the processing liquid (pure water) in the washing tank 72.

上記基板の硝酸中への浸漬及びその後の水洗、ジンケート液中への浸漬及びその後の水洗を1サイクルとして、このサイクルを2回繰返し、これによって、いわゆるダブルジンケート処理を行う。このように、ダブルジンケート処理を行うことで、Alからなるバンプパッド50(図5参照)の表面に、1回目のジンケート処理で粗く付与された亜鉛(亜鉛めっき膜)を硝酸で除去し、しかる後、バンプパッド50の表面を、2回目のジンケート処理で細かく亜鉛に置換することができる。これによって、図5(b)に示す亜鉛めっき膜52を形成する。   This cycle is repeated twice, with the substrate immersed in nitric acid and then washed with water, and immersed in the zincate solution and then washed with water, whereby a so-called double zincate treatment is performed. In this way, by performing the double zincate treatment, the zinc (zinc plating film) roughly applied to the surface of the bump pad 50 made of Al (see FIG. 5) by the first zincate treatment is removed with nitric acid. Thereafter, the surface of the bump pad 50 can be finely replaced with zinc by the second zincate treatment. Thereby, the galvanized film 52 shown in FIG. 5B is formed.

次に、ダブルジンケート処置後の基板を、装置間基板搬送装置110の基板保持具108を経由して、無電解Niめっき装置86の基板ホルダ84に受け渡す。そして、前述のジンケート処理とほぼ同様にして、基板ホルダ84で鉛直方向に保持した複数枚の基板を、Niめっき槽80内の、例えば液温が80℃のNiめっき液に、例えば50分間浸漬させ、これによって、図5(b)に示すNiめっき膜54を形成する。   Next, the substrate after the double zincate treatment is transferred to the substrate holder 84 of the electroless Ni plating apparatus 86 via the substrate holder 108 of the inter-substrate substrate transfer apparatus 110. Then, in substantially the same manner as the above-described zincate treatment, the plurality of substrates held in the vertical direction by the substrate holder 84 are immersed in, for example, a Ni plating solution having a temperature of 80 ° C. in the Ni plating tank 80 for, for example, 50 minutes. Thus, the Ni plating film 54 shown in FIG. 5B is formed.

このめっき時に、ポンプ126を駆動することで、めっき液循環ライン132を通して、図10に示すように、Niめっき槽80の内部に上向きのめっき液の流れを形成する。すると、基板ホルダ84で保持した各基板は、前述のように、下側ガイド板150と上側ガイド板152でほぼ全周囲を囲繞された状態で、Niめっき槽80の内部にめっき液に浸漬されているため、各基板の外周部に基板の表面に沿っためっき液の流れと連続するめっき液の流れが形成される。これによって、基板の表面に、膜厚や膜形状のより面内均一性を高めたNiめっき膜54が形成される。このことは、下記のAuめっき膜にあっても同様である。しかる後、Niめっき後の基板を、水洗槽82内の処理液(純水)に、例えば5分間浸漬させて水洗する。   By driving the pump 126 during plating, an upward plating solution flow is formed inside the Ni plating tank 80 through the plating solution circulation line 132 as shown in FIG. Then, each substrate held by the substrate holder 84 is immersed in the plating solution inside the Ni plating tank 80 in a state where the entire periphery is surrounded by the lower guide plate 150 and the upper guide plate 152 as described above. Therefore, a plating solution flow that is continuous with the plating solution flow along the surface of the substrate is formed on the outer periphery of each substrate. As a result, the Ni plating film 54 with higher in-plane uniformity of film thickness and film shape is formed on the surface of the substrate. The same applies to the following Au plating film. Thereafter, the Ni-plated substrate is immersed in a treatment liquid (pure water) in the water washing tank 82 for 5 minutes, for example, and washed.

次に、Niめっき後の基板を、装置間基板搬送装置110の基板保持具108を経由して、無電解Auめっき装置96の基板ホルダ94に受け渡す。そして、前述のジンケート処理とほぼ同様にして、基板ホルダ94で鉛直方向に保持した複数枚の基板を、Auめっき槽90内の、例えば液温が75℃のAuめっき液に、例えば10分間浸漬させ、これによって、図5(b)に示すAuめっき膜56を形成する。しかる後、Auめっき後の基板を、水洗槽92内の処理液(純水)に、例えば5分間浸漬させて水洗する。   Next, the substrate after Ni plating is transferred to the substrate holder 94 of the electroless Au plating apparatus 96 via the substrate holder 108 of the inter-substrate substrate transfer apparatus 110. Then, in substantially the same manner as the above-described zincate treatment, a plurality of substrates held in the vertical direction by the substrate holder 94 are immersed in, for example, an Au plating solution having a liquid temperature of 75 ° C. in the Au plating tank 90 for 10 minutes, for example. As a result, an Au plating film 56 shown in FIG. 5B is formed. Then, the substrate after Au plating is immersed in a treatment liquid (pure water) in the water rinsing tank 92 for 5 minutes, for example, and washed with water.

次に、Auめっき後の基板を、装置間基板搬送装置110の基板保持具108で保持して乾燥装置104の基板ホルダ102に受け渡す。そして、乾燥ユニット100で、例えばエアブローまたはIPA(イソプロピルアルコール)蒸気を使用した乾燥方法で基板ホルダ102で保持した基板を乾燥させる。   Next, the substrate after Au plating is held by the substrate holder 108 of the inter-substrate substrate transfer device 110 and transferred to the substrate holder 102 of the drying device 104. Then, the substrate held by the substrate holder 102 is dried by the drying unit 100 by a drying method using, for example, air blow or IPA (isopropyl alcohol) vapor.

そして、乾燥後の基板を装置間基板搬送装置110の基板保持具108で受け渡って次工程に搬送する。これにより、一連の無電解めっき処理を終了する。   Then, the dried substrate is transferred by the substrate holder 108 of the inter-substrate substrate transfer apparatus 110 and transferred to the next process. This completes a series of electroless plating processes.

なお、図12及び図13に示すように、下側ガイド板150を、Niめっき槽80の内槽120の下部内周面に固定して、基板ホルダ84で保持した基板WをNiめっき槽80内のめっき液に浸漬させた時に、基板Wの周囲の下半分をNiめっき槽80の内槽120に固定した下側ガイド板150で囲繞するようにしてもよい。このことは、Auめっき槽90にあっても同様である。   12 and 13, the lower guide plate 150 is fixed to the lower inner peripheral surface of the inner tank 120 of the Ni plating tank 80, and the substrate W held by the substrate holder 84 is placed in the Ni plating tank 80. When immersed in the inner plating solution, the lower half around the substrate W may be surrounded by the lower guide plate 150 fixed to the inner tank 120 of the Ni plating tank 80. The same applies to the Au plating tank 90.

また、図14及び図15に示すように、互いに隣り合う下側ガイド板150の間に位置して鉛直方向に直線状に延びる複数枚の連結板154で下側ガイド板150を連結して構成した平面格子状の下側ガイド板構造体156と、互いに隣り合う上側ガイド板152の間に位置して鉛直方向に直線状に延びる複数枚の連結板(図示せず)で下側ガイド板152を連結して構成した平面格子状の上側ガイド板構造体158で、支持棒142で下方を支持し基板ホルダ84で保持してNiめっき槽80内のめっき液に浸漬させた各基板Wの周囲を包囲するようにしてもよい。   Further, as shown in FIGS. 14 and 15, the lower guide plate 150 is connected by a plurality of connecting plates 154 that are positioned between the adjacent lower guide plates 150 and extend linearly in the vertical direction. The lower guide plate 152 is composed of a plurality of connecting plates (not shown) that are positioned between the planar guide-like lower guide plate structure 156 and the adjacent upper guide plates 152 and extend linearly in the vertical direction. Is a planar lattice-shaped upper guide plate structure 158 constructed by connecting the substrates, and the periphery of each substrate W supported by the support rod 142 and held by the substrate holder 84 and immersed in the plating solution in the Ni plating bath 80 May be surrounded.

このように、平面格子状の下側ガイド板構造体156及び上側ガイド板構造体158でNiめっき槽80内のめっき液に浸漬させた各基板Wの周囲を包囲することで、図16に示すように、基板Wの側方に格子状の流路を形成して、基板Wの側方を上方に向かって流れるめっき液の流れに乱れが生じることを連結板156で防止することができる。しかも、下側ガイド板構造体156にあっては、下側ガイド板150を連結板156で補強して、下側ガイド板150自体の強度及び安定性を増大させることができる。このことは、上側ガイド板構造体158にあっても同様である。   In this way, by surrounding the periphery of each substrate W immersed in the plating solution in the Ni plating tank 80 with the lower guide plate structure 156 and the upper guide plate structure 158 in the form of a planar lattice, it is shown in FIG. As described above, it is possible to prevent the disturbance of the flow of the plating solution flowing upward on the side of the substrate W by forming the grid-like flow path on the side of the substrate W with the connecting plate 156. Moreover, in the lower guide plate structure 156, the lower guide plate 150 can be reinforced by the connecting plate 156 to increase the strength and stability of the lower guide plate 150 itself. The same applies to the upper guide plate structure 158.

これまで本発明の一実施形態について説明したが、本発明は上述の実施形態に限定されず、その技術的思想の範囲内において種々異なる形態にて実施されてよいことは言うまでもない。   Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

50 バンプパッド
52 亜鉛めっき膜
54 Niめっき膜
56 Auめっき膜
60 前洗浄槽
62,72,82,92 水洗槽
64,74,84,94,102 基板ホルダ
66 前洗浄装置
70 ジンケート処理槽
76 ジンケート処理装置
80 Niめっき槽
86 無電解Niめっき装置
90 Auめっき槽
96 無電解Auめっき装置
100 乾燥ユニット
104 乾燥装置
108 基板保持具
110 装置間基板搬送装置
128 温度調節器
130 フィルタ
132 めっき液循環ライン
136 蓋体
140 側板
142 支持棒
150 下側ガイド板
152 上側ガイド板
154 連結板
156 上側ガイド板構造体
158 下側ガイド板構造体
50 Bump pad 52 Zinc plating film 54 Ni plating film 56 Au plating film 60 Pre-cleaning tanks 62, 72, 82, 92 Water-washing tanks 64, 74, 84, 94, 102 Substrate holder 66 Pre-cleaning apparatus 70 Jincate treatment tank 76 Zincate treatment Apparatus 80 Ni plating tank 86 Electroless Ni plating apparatus 90 Au plating tank 96 Electroless Au plating apparatus 100 Drying unit 104 Drying apparatus 108 Substrate holder 110 Inter-board substrate transfer apparatus 128 Temperature controller 130 Filter 132 Plating solution circulation line 136 Lid Body 140 side plate 142 support rod 150 lower guide plate 152 upper guide plate 154 connecting plate 156 upper guide plate structure 158 lower guide plate structure

Claims (5)

内部に上方に向かうめっき液の流れを形成しつつめっき液を保持するめっき槽と、
複数枚の基板を鉛直方向に並列に保持して前記めっき槽内のめっき液に浸漬させる基板ホルダと、
前記基板ホルダで保持してめっき液に浸漬させた各基板の周囲をそれぞれ囲繞して、各基板の外周部に基板表面に沿っためっき液の流れと連続するめっき液の流れを形成する複数枚のガイド板を有することを特徴とする無電解めっき装置。
A plating tank for holding the plating solution while forming a flow of the plating solution upward in the interior;
A substrate holder that holds a plurality of substrates in parallel in the vertical direction and is immersed in the plating solution in the plating tank;
A plurality of sheets that surround the periphery of each substrate held by the substrate holder and immersed in the plating solution, and form a plating solution flow that is continuous with the plating solution flow along the substrate surface on the outer peripheral portion of each substrate An electroless plating apparatus comprising: a guide plate.
前記基板ホルダで保持される基板と該基板の周囲を囲繞する前記ガイド板との距離は、1〜10mmであることを特徴とする請求項1記載の無電解めっき装置。   The electroless plating apparatus according to claim 1, wherein a distance between the substrate held by the substrate holder and the guide plate surrounding the substrate is 1 to 10 mm. 前記複数枚のガイド板は、互いに隣接するガイド板間に配置されて鉛直方向に直線状に延びる複数枚の連結板で互いに平面格子状に連結されていることを特徴とする請求項1または2記載の無電解めっき装置。   The plurality of guide plates are arranged between adjacent guide plates and connected to each other in a planar grid pattern by a plurality of connecting plates extending linearly in the vertical direction. The electroless plating apparatus described. 前記ガイド板は、基板ホルダで保持してめっき槽内のめっき液に浸漬させた基板の下半分の周囲を囲繞する下側ガイド板と、基板の上半分の周囲を囲繞する上側ガイド板とからなり、
前記下側ガイド板は前記基板ホルダに、前記上側ガイド板は前記めっき槽の上端開口部を開閉する蓋体の裏面にそれぞれ取り付けられていることを特徴とする請求項1乃至3のいずれか一項に記載の無電解めっき装置。
The guide plate includes a lower guide plate surrounding the lower half of the substrate held by the substrate holder and immersed in the plating solution in the plating tank, and an upper guide plate surrounding the upper half of the substrate. Become
The lower guide plate is attached to the substrate holder, and the upper guide plate is attached to the back surface of the lid that opens and closes the upper end opening of the plating tank. The electroless plating apparatus according to item.
前記ガイド板は、基板ホルダで保持してめっき槽内のめっき液に浸漬させた基板の下半分の周囲を囲繞する下側ガイド板と、基板の上半分の周囲を囲繞する上側ガイド板とからなり、
前記下側ガイド板は前記めっき槽の内部に、前記上側ガイド板は前記めっき槽の上端開口部を開閉する蓋体の裏面にそれぞれ取り付けられていることを特徴とする請求項1乃至3のいずれか一項に記載の無電解めっき装置。
The guide plate includes a lower guide plate surrounding the lower half of the substrate held by the substrate holder and immersed in the plating solution in the plating tank, and an upper guide plate surrounding the upper half of the substrate. Become
The lower guide plate is attached to the inside of the plating tank, and the upper guide plate is attached to the back surface of the lid that opens and closes the upper end opening of the plating tank. The electroless plating apparatus according to claim 1.
JP2011250435A 2011-11-16 2011-11-16 Electroless plating apparatus Pending JP2013104120A (en)

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JP2011250435A JP2013104120A (en) 2011-11-16 2011-11-16 Electroless plating apparatus
TW101142384A TWI485286B (en) 2011-11-16 2012-11-14 Electroless plating and electroless plating
US13/677,388 US9293364B2 (en) 2011-11-16 2012-11-15 Electroless plating apparatus and electroless plating method
KR1020120129552A KR101391533B1 (en) 2011-11-16 2012-11-15 electroless plating apparatus and electroless plating method
KR1020130133516A KR20130132710A (en) 2011-11-16 2013-11-05 Electroless plating apparatus
US15/043,425 US20160160352A1 (en) 2011-11-16 2016-02-12 Electroless plating apparatus

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