JP2017183592A - 基板の製造方法及び基板 - Google Patents
基板の製造方法及び基板 Download PDFInfo
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- JP2017183592A JP2017183592A JP2016071000A JP2016071000A JP2017183592A JP 2017183592 A JP2017183592 A JP 2017183592A JP 2016071000 A JP2016071000 A JP 2016071000A JP 2016071000 A JP2016071000 A JP 2016071000A JP 2017183592 A JP2017183592 A JP 2017183592A
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- substrate
- layer
- plating
- temperature
- copper wiring
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- 239000000758 substrate Substances 0.000 title claims abstract description 189
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 57
- 238000007747 plating Methods 0.000 claims abstract description 254
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 154
- 229910052802 copper Inorganic materials 0.000 claims abstract description 154
- 239000010949 copper Substances 0.000 claims abstract description 154
- 230000004888 barrier function Effects 0.000 claims abstract description 152
- 229910001128 Sn alloy Inorganic materials 0.000 claims abstract description 106
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- 150000002739 metals Chemical class 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 26
- 238000009713 electroplating Methods 0.000 description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 15
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 10
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 6
- 239000004327 boric acid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Abstract
Description
とは、レジスト層202の開口部の形状が略円形である場合は各層の外径をいい、レジスト層202の開口部の形状が多角形である場合は、多角形の各層の頂点間の距離をいう。
層の幅を銅配線層の幅よりも十分に大きくすることができる。したがって、スズ合金が銅配線層に接触することをより確実に抑制することができる。バリア層をめっきするためのめっき液は、その種類によってはホウ酸が含まれる。このホウ酸は、めっき液の温度が15℃を下回ると析出する虞がある。したがって、この一形態によれば、第2の温度が15℃以上であるので、バリア層をめっきするためのめっき液からホウ酸が析出することを抑制することができる。
以下、本発明の第1実施形態について図面を参照して説明する。以下で説明する図面において、同一の又は相当する構成要素には、同一の符号を付して重複した説明を省略する。
タ142及び第2トランスポータ144のいずれか一方のみを備えるようにしてもよい。
次に、本発明の第2実施形態に係る基板の製造方法について説明する。第2実施形態に係る基板の製造方法は、図1及び図2に示しためっき装置を用いて実施することができる。第2実施形態に係る基板の製造方法では、第1実施形態と同様に、図2に示すめっきセル50において、基板W上に形成されるレジスト層が所望の温度になるように、めっき液Qの温度を温度調節機構58aによって所望の温度に調節する。以下、第2実施形態に係る基板の製造方法について詳細に説明する。
配線層303の側面とレジスト層302との間に微小な隙間が生じる。このため、強化バリア層306をめっきするとき、めっき液Qが銅配線層303の側面の少なくとも一部とレジスト層302との隙間に入り込み、銅配線層303の側面の少なくとも一部にも強化バリア層306がめっきされる。即ち、図4Cに示されるように、強化バリア層306は、銅配線層303の側面の少なくとも一部を覆う。
たときに、スズ合金が銅配線層303に接触することをいっそう抑制することができる。図6A−図6Fに示した従来のプロセスでは、バリア層204を形成するときのめっき液の温度は、めっき速度及びめっき液に含まれる添加剤の効率性の観点から、約40℃に設定されていた。めっき速度を高く維持することはめっきプロセスにおいて重要な要素の一つであり、めっき速度が最適な値になるようにめっき液の温度を設定することが一般的に行われる。しかしながら、第2実施形態においては、強化バリア層306を形成するときのめっき液の温度を従来よりも大幅に低くすることで、めっき速度及び添加剤の効率性は悪化するものの、強化バリア層306の幅を銅配線層303の幅よりも大きくすることができる。
次に、本発明の第3実施形態について説明する。第3実施形態では、めっき装置の構成が、図1に示しためっき装置と異なる。第3実施形態で説明するめっき装置を使用して、第1実施形態及び第2実施形態で説明した基板の製造方法を実施することができる。
れにより、基板をめっきセル50bのめっき液に浸漬したときに、めっき液の温度の低下又は上昇を抑制することができる。
202…レジスト層
203…銅配線層
204…バリア層
205…スズ合金バンプ層
301…シード層
302…レジスト層
303…銅配線層
304…バリア層
305…スズ合金バンプ層
306…強化バリア層
W…基板
Claims (14)
- レジスト開口部にバンプを有する基板の製造方法であって、
基板上に第1の温度とされためっき液で銅配線層をめっきする工程と、
前記銅配線層上に第1の温度と同等の第2の温度とされためっき液でバリア層をめっきする工程と、
前記バリア層上にスズ合金バンプ層をめっきする工程と、を有する基板の製造方法。 - 請求項1に記載された基板の製造方法において、
前記第2の温度は、前記第1の温度との差が5℃未満である、基板の製造方法。 - 請求項2に記載された基板の製造方法において、
前記第2の温度は、前記第1の温度との差が2.5℃以下である、基板の製造方法。 - 請求項3に記載された基板の製造方法において、
前記第2の温度は、前記第1の温度との差が1℃以下である、基板の製造方法。 - 請求項1ないし4のいずれか一項に記載された基板の製造方法において、
前記バリア層は、Ni及びCoからなる群のうち一つ以上の金属を含む、基板の製造方法。 - レジスト開口部にバンプを有する基板の製造方法であって、
基板上に第1の温度とされためっき液で銅配線層をめっきする工程と、
前記銅配線層上に第1の温度未満の第2の温度とされためっき液で強化バリア層をめっきする工程と、
前記強化バリア層上にスズ合金層をめっきする工程と、を有する基板の製造方法。 - 請求項6に記載された基板の製造方法において、
前記強化バリア層の幅は、前記銅配線層の幅よりも大きい、基板の製造方法。 - 請求項7に記載された基板の製造方法において、
前記強化バリア層は、前記銅配線層の側面の少なくとも一部を覆う、基板の製造方法。 - 請求項6ないし8のいずれか一項に記載された基板の製造方法において、
前記第2の温度は、前記第1の温度よりも5℃以上小さく且つ15℃以上である、基板の製造方法。 - 請求項6ないし9のいずれか一項に記載された基板の製造方法において、
前記強化バリア層は、Ni及びCoからなる群のうち一つ以上の金属を含む、基板の製造方法。 - 請求項1ないし10のいずれか一項に記載された基板の製造方法において、
前記スズ合金バンプ層をめっきする工程は、前記第2の温度以上の第3の温度とされためっき液で前記スズ合金バンプ層をめっきする工程を含む、基板の製造方法。 - レジスト開口部にバンプを有する基板であって、
基板上に設けられる銅配線層と、
前記銅配線層上に設けられる強化バリア層と、
前記強化バリア層上のスズ合金バンプ層と、を有し、
前記強化バリア層の幅は、前記銅配線層の幅よりも大きい、基板。 - 請求項12に記載された基板において、
前記強化バリア層は、前記銅配線層の側面の少なくとも一部を覆う、基板。 - 請求項12又は13に記載された基板において、
前記強化バリア層は、Ni及びCoからなる群のうち一つ以上の金属を含む、基板。
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TW106110488A TWI726080B (zh) | 2016-03-31 | 2017-03-29 | 基板之製造方法及基板 |
US16/090,059 US20200335394A1 (en) | 2016-03-31 | 2017-03-29 | Method of manufacturing substrate and the same substrate |
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