JP2009155727A5 - Plating equipment - Google Patents
Plating equipment Download PDFInfo
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- JP2009155727A5 JP2009155727A5 JP2008305978A JP2008305978A JP2009155727A5 JP 2009155727 A5 JP2009155727 A5 JP 2009155727A5 JP 2008305978 A JP2008305978 A JP 2008305978A JP 2008305978 A JP2008305978 A JP 2008305978A JP 2009155727 A5 JP2009155727 A5 JP 2009155727A5
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- 238000007747 plating Methods 0.000 title claims description 101
- 238000003756 stirring Methods 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 7
- 239000000758 substrate Substances 0.000 description 16
- 238000000926 separation method Methods 0.000 description 9
- 206010003664 Atrial septal defect Diseases 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
本発明は、半導体ウェハ等の被めっき体(基板)の表面にめっきを行うめっき装置に関し、特に半導体ウェハの表面に設けられた微細な配線用溝やホール、レジスト開口部にめっき膜を形成したり、半導体ウェハの表面にパッケージの電極等と電気的に接続するバンプ(突起状電極)を形成したりするのに好適なめっき装置に関する。 The present invention relates to a plating equipment for performing plating on the surface of the object to be plated such as a semiconductor wafer (substrate), particularly fine wiring trenches and holes provided on the surface of the semiconductor wafer, a plating film on the resist opening formation or relates to a preferred plating equipment to or forming bumps (protruding electrodes) to be connected packages such as electrodes and electrically to the surface of the semiconductor wafer.
本発明は上述の点に鑑みてなされたもので、半導体ウェハ等の被めっき体(基板)にめっきを行う場合に、高電流密度の条件であっても平坦な先端形状のバンプを形成したり、良好な面内均一性を有する金属膜を形成したりすることができる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 points, and when plating is performed on an object to be plated (substrate) such as a semiconductor wafer, a flat tip-shaped bump is formed even under a high current density condition. , and to provide a plating equipment capable or forming a metal film having good surface uniformity.
請求項1に記載の発明は、めっき液を保持するめっき槽と、前記めっき槽内のめっき液に浸漬させて配置されるアノードと、被めっき体を保持し前記アノードと対向する位置に配置するホルダと、電場の拡がりを制限するための開口を有する調整板と、前記調整板を着脱自在に保持して前記アノードと前記ホルダに保持されて前記アノードと対向する位置に配置される被めっき体との間に配置する調整板ホルダとを有することを特徴とするめっき装置である。 According to the first aspect of the present invention, a plating tank that holds a plating solution, an anode that is immersed in the plating solution in the plating tank, and a position that holds the object to be plated and faces the anode. A holder, an adjustment plate having an opening for restricting the expansion of the electric field, and an object to be plated which is detachably held by the adjustment plate and is held by the anode and the holder so as to face the anode. And an adjusting plate holder disposed between the two.
請求項2に記載の発明は、前記調整板ホルダは、前記めっき槽に固定された固定ホルダと該固定ホルダにヒンジを介して回転自在に連結された可動ホルダとを有し、被めっき体を前記固定ホルダと前記可動ホルダとの間に挟持して固定するように構成されていることを特徴とする請求項1記載のめっき装置である。
請求項3に記載の発明は、前記可動ホルダと前記めっき槽との間から電場が漏れるのを防止する電場遮蔽部材を備えていることを特徴とする請求項2記載のめっき装置である。
According to a second aspect of the present invention, the adjustment plate holder includes a fixed holder fixed to the plating tank and a movable holder rotatably connected to the fixed holder via a hinge. The plating apparatus according to claim 1, wherein the plating apparatus is configured to be sandwiched and fixed between the fixed holder and the movable holder .
A third aspect of the present invention is the plating apparatus according to the second aspect, further comprising an electric field shielding member that prevents an electric field from leaking between the movable holder and the plating tank .
請求項4に記載の発明は、前記ホルダで保持した被めっき体と前記アノードとの間に配置され、被めっき体に平行に往復動してめっき液を攪拌するパドルを備え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めっき装置である。 The invention according to claim 4 is provided with a paddle disposed between the object to be plated held by the holder and the anode, and reciprocating in parallel with the object to be plated to agitate the plating solution. Ru plating apparatus der according to any one of claims 1 to 3,.
前記調整板は、好ましくは、前記被めっき体の外形に沿った内径を有する筒状部と、該筒状部の前記アノード側端部の外周に接続されて前記アノードと前記被めっき体との間に形成される電場を遮断するフランジ部を有する。 Before SL adjusting plate preferably includes a cylindrical portion having said along the outer shape of the object to be plated inside diameter, said being connected to the outer periphery of the anode side end portion of the cylindrical portion anode and said object to be plated that having a flange portion for interrupting an electric field formed between the.
このように、アノードと被めっき体との間に調整板を配置して、被めっき体の全面に亘る電位分布をより均一にすることで、高電流密度のめっき条件でも、被めっき体に形成される金属膜(めっき膜)の面内均一性を高めることができる。 In this way, the adjustment plate is arranged between the anode and the object to be plated, and the potential distribution over the entire surface of the object to be plated is made more uniform, so that it can be formed on the object to be plated even under high current density plating conditions. The in-plane uniformity of the metal film (plating film) to be applied can be improved.
本発明のめっき装置によれば、半導体ウエハ等の被めっき体(基板)にめっきを行う場合に、高電流密度の条件であっても、平坦な先端形状のバンプを形成することのでき、しかも良好な面内均一性を有する金属膜を形成することができる。 According to the plating equipment of the present invention, when performing the plating plating object such as a semiconductor wafer (substrate), even conditions of high current density, can of forming a bump of a flat tip shape, In addition, a metal film having good in-plane uniformity can be formed.
図1は、めっき装置を示す縦断正面図である。図1に示すように、めっき装置は、内部にめっき液Qを保持するめっき槽10を有し、めっき槽10の上方外周には、めっき槽10の縁から溢れ出ためっき液Qを受け止めるオーバーフロー槽12が備えられている。オーバーフロー槽12の底部には、ポンプ14を備えためっき液供給路16の一端が接続され、めっき液供給路16の他端は、めっき槽10の底部に設けられためっき液供給口18に接続されている。これにより、オーバーフロー槽12内に溜まっためっき液Qは、ポンプ14の駆動に伴ってめっき槽10内に還流される。めっき液供給路16には、ポンプ14の下流側に位置して、めっき液Qの温度を調節する恒温ユニット20と、めっき液内の異物をフィルタリングして除去するフィルタ22が介装されている。 Figure 1 is a longitudinal front view of a fit Kki device. As shown in FIG. 1, the plating apparatus includes a plating tank 10 that holds a plating solution Q therein, and an overflow that catches the plating solution Q that overflows from the edge of the plating tank 10 on the upper outer periphery of the plating tank 10. A tank 12 is provided. One end of a plating solution supply path 16 provided with a pump 14 is connected to the bottom of the overflow tank 12, and the other end of the plating solution supply path 16 is connected to a plating solution supply port 18 provided at the bottom of the plating tank 10. Has been. As a result, the plating solution Q accumulated in the overflow tank 12 is refluxed into the plating tank 10 as the pump 14 is driven. A constant temperature unit 20 that adjusts the temperature of the plating solution Q and a filter 22 that filters and removes foreign matter in the plating solution are disposed in the plating solution supply path 16 on the downstream side of the pump 14. .
従来の一般的なバンプ形成のためのめっきにおける電流密度は3〜5ASDであるが、この例のめっきにおける電流密度は、例えば8ASDである。ただしこの例におけるめっき装置及びめっき方法は、14ASDまで適用可能である。以下の例における電流密度の条件は、断らない限り8ASDである。 The current density in plating for forming a conventional general bump is 3 to 5 ASD, and the current density in plating in this example is, for example, 8 ASD. However, the plating apparatus and plating method in this example can be applied up to 14 ASD. The current density condition in the following examples is 8 ASD unless otherwise noted.
図34は、他のめっき装置を示す。この例のめっき装置は、遮蔽板82として、分離板80の下面から下方に垂直に延びて下端面がめっき槽10の底壁に達するものが使用され、これによって、分離板80の下方に形成されるめっき液分離室86は、遮蔽板82によって、アノード側液分散室110とカソード側液分散室112に完全に分離されている。この遮蔽板82の下端面は、例えば溶接等によって、めっき槽10の底壁に固着されている。 FIG. 34 shows another plating apparatus. In the plating apparatus of this example, as the shielding plate 82, one that extends vertically downward from the lower surface of the separation plate 80 and has a lower end surface that reaches the bottom wall of the plating tank 10, is formed below the separation plate 80. The plating solution separation chamber 86 is completely separated into the anode side liquid dispersion chamber 110 and the cathode side liquid dispersion chamber 112 by the shielding plate 82. The lower end surface of the shielding plate 82 is fixed to the bottom wall of the plating tank 10 by, for example, welding.
このように、調整板移動機構142を介して、調整板134の基板Wに対する水平方向の位置を微調整したり、調整板移動機構160を介して、調整板134の基板Wに対する水平及び垂直方向の位置を微調整したりすることで、基板Wの表面に形成されるめっき膜の膜厚の面内均一性を向上させることができる。特に、調整板134は、基板Wに近接した位置に配置されるため、調整板134の基板Wに対する垂直または水平方向の位置を微調整することが、基板Wの表面に形成されるめっき膜の膜厚の面内均一性を向上させる上で重要となる。 As described above, the horizontal position of the adjustment plate 134 relative to the substrate W is finely adjusted via the adjustment plate moving mechanism 142 , and the horizontal and vertical directions of the adjustment plate 134 relative to the substrate W are determined via the adjustment plate moving mechanism 160. By finely adjusting the position, the in-plane uniformity of the film thickness of the plating film formed on the surface of the substrate W can be improved. In particular, since the adjustment plate 134 is disposed at a position close to the substrate W, fine adjustment of the position of the adjustment plate 134 in the vertical or horizontal direction with respect to the substrate W can be performed by the plating film formed on the surface of the substrate W. This is important for improving the in-plane uniformity of the film thickness.
図42及び図43は、更に他のめっき装置の要部を示す。この例の図1に示すめっき装置と異なる点は、図43に示す、上部に幅広の把持部180を有するアノードホルダ28を、前述の図37等に示す、幅広の把持部140を有する調整板134をそれぞれ使用し、めっき槽10の上端開口部に跨って設置される単一の位置決め保持部182上に、把持部180を介してアノードホルダ28を、把持部140を介して調整板134を、ホルダアーム64(図9参照)を介して基板ホルダ24を、それぞれ設置するようにしている。つまり、アノードホルダ28の把持部180、調整板134の把持部140及び基板ホルダ24のホルダアーム64は、同一部材である位置決め保持部182上に載置されて設置される。これにより、アノードホルダ28で保持されるアノード26、調整板134の筒状部136及び基板ホルダ24で保持される基板Wの各中心軸を確実に一致させることができる。 42 and 43, further showing a major portion of another order Kki device. This example differs from the plating apparatus shown in FIG. 1 in that an anode holder 28 having a wide gripping portion 180 on the upper portion shown in FIG. 43 and an adjusting plate having a wide gripping portion 140 shown in FIG. 134, the anode holder 28 is disposed via the gripping portion 180 and the adjustment plate 134 is disposed via the gripping portion 140 on the single positioning holding portion 182 installed across the upper end opening of the plating tank 10. The substrate holders 24 are respectively installed via the holder arms 64 (see FIG. 9). That is, the gripping portion 180 of the anode holder 28, the gripping portion 140 of the adjustment plate 134, and the holder arm 64 of the substrate holder 24 are placed and placed on the positioning holding portion 182 that is the same member. Accordingly, the central axes of the anode 26 held by the anode holder 28, the cylindrical portion 136 of the adjustment plate 134, and the substrate W held by the substrate holder 24 can be reliably aligned.
図46乃至図48は、本発明の実施形態のめっき装置を示す。この例の図1に示すめっき装置と異なる点は、めっき槽10の内周面の所定位置に、筒状部50と矩形状のフランジ部52からなる調整板34を着脱自在に保持する調整板ホルダ200を設けた点にある。この調整板ホルダ200は、共に調整板34のフランジ部52よりやや大きな矩形枠状の固定ホルダ202と可動ホルダ204を有しており、固定ホルダ202の底部及び両側端部には、可動ホルダ204の方向に膨出した凸状部202aが設けられている。この凸状部202aの高さは、調整板34のフランジ部52の厚さとほぼ等しく設定されている。 Figure 46 through 48 shows a plating apparatus implementation form of the present invention. 1 differs from the plating apparatus shown in FIG. 1 in this example in that an adjustment plate 34 detachably holding an adjustment plate 34 composed of a cylindrical portion 50 and a rectangular flange portion 52 at a predetermined position on the inner peripheral surface of the plating tank 10. The holder 200 is provided. The adjustment plate holder 200 has a rectangular frame-shaped fixed holder 202 and a movable holder 204 that are slightly larger than the flange portion 52 of the adjustment plate 34, and the movable holder 204 is provided at the bottom and both side ends of the fixed holder 202. A convex portion 202a bulging in the direction of is provided. The height of the convex portion 202a is set substantially equal to the thickness of the flange portion 52 of the adjustment plate 34.
Claims (4)
前記めっき槽内のめっき液に浸漬させて配置されるアノードと、
被めっき体を保持し前記アノードと対向する位置に配置するホルダと、
電場の拡がりを制限するための開口を有する調整板と、
前記調整板を着脱自在に保持して前記アノードと前記ホルダに保持されて前記アノードと対向する位置に配置される被めっき体との間に配置する調整板ホルダとを有することを特徴とするめっき装置。 A plating tank for holding a plating solution;
An anode disposed by being immersed in a plating solution in the plating tank;
A holder for holding an object to be plated and disposed at a position facing the anode;
An adjustment plate having an opening to limit the expansion of the electric field;
Plating comprising: an adjusting plate holder that holds the adjusting plate in a detachable manner and that is arranged between the anode and the object to be plated that is held by the holder and is disposed at a position facing the anode. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2008305978A JP5213669B2 (en) | 2007-12-04 | 2008-12-01 | Plating equipment |
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JP2007313730 | 2007-12-04 | ||
JP2007313730 | 2007-12-04 | ||
JP2008305978A JP5213669B2 (en) | 2007-12-04 | 2008-12-01 | Plating equipment |
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JP2009155727A JP2009155727A (en) | 2009-07-16 |
JP2009155727A5 true JP2009155727A5 (en) | 2011-01-20 |
JP5213669B2 JP5213669B2 (en) | 2013-06-19 |
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JP2008292174A Active JP5184308B2 (en) | 2007-12-04 | 2008-11-14 | Plating apparatus and plating method |
JP2008305978A Active JP5213669B2 (en) | 2007-12-04 | 2008-12-01 | Plating equipment |
JP2013004854A Active JP5726921B2 (en) | 2007-12-04 | 2013-01-15 | Plating equipment |
JP2013004855A Active JP5572229B2 (en) | 2007-12-04 | 2013-01-15 | Plating equipment |
JP2015075016A Active JP5980983B2 (en) | 2007-12-04 | 2015-04-01 | Plating equipment |
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JP2013004855A Active JP5572229B2 (en) | 2007-12-04 | 2013-01-15 | Plating equipment |
JP2015075016A Active JP5980983B2 (en) | 2007-12-04 | 2015-04-01 | Plating equipment |
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JP (5) | JP5184308B2 (en) |
KR (3) | KR101493380B1 (en) |
CN (5) | CN107604426B (en) |
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