JP2022535603A - 封止構造及びその成形方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000005538 encapsulation Methods 0.000 title claims abstract description 18
- 238000000465 moulding Methods 0.000 title claims description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 103
- 239000002184 metal Substances 0.000 claims abstract description 103
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 229920002120 photoresistant polymer Polymers 0.000 claims description 89
- 230000008569 process Effects 0.000 claims description 27
- 238000011161 development Methods 0.000 claims description 15
- 238000004544 sputter deposition Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 230000005012 migration Effects 0.000 abstract description 6
- 238000013508 migration Methods 0.000 abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 150000002739 metals Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
Description
図4に示すように、ウェハ基板200上にフォトレジスト300を塗布することと、
図5及び図6に示すように、露光現像プロセスによって一部のフォトレジスト300を除去することで予約フォトレジスト301を形成することとを含む。予約フォトレジスト301は、少なくとも複数の金属バンプ30の間に位置する。
図5に示すように、複数の開孔401を有するマスクプレート400をフォトレジスト300上に置くことと、
光線を複数の開孔401を通過させてフォトレジスト300に照射することで露光を実施することと、
図6に示すように、現像プロセスによって一部のフォトレジスト300を除去することにより、逆台形を呈する予約フォトレジスト301を形成することと、を含む。
Claims (10)
- 封止構造であって、
基板と、再配線層とを備え、
前記再配線層は、間隔を空けて設けられる複数の金属バンプを含み、少なくとも前記金属バンプの周縁は、シード層で覆われ、且つ隣接する前記金属バンプの前記シード層同士は、互いに離間することを特徴とする封止構造。 - 前記シード層は、互いに接続される第1シード層と第2シード層と第3シード層とを含み、前記第1シード層は、前記金属バンプの周縁に位置し、前記第2シード層は、前記金属バンプの前記基板から遠く離れる側の表面に位置し、前記第3シード層は、前記基板の上に位置し、且つ隣接する前記第3シード層同士は、互いに離間することを特徴とする請求項1に記載の封止構造。
- 前記第2シード層は、取り囲んで開口を形成することで前記金属バンプを露出させることを特徴とする請求項2に記載の封止構造。
- 前記シード層は、チタン層であることを特徴とする請求項1に記載の封止構造。
- 封止構造の成形方法であって、
間隔を空けて設けられる複数の金属バンプを含む再配線層をウェハ基板上に形成するステップと、
少なくとも前記金属バンプの周縁にシード層を形成するステップと、
ウェハ基板をカットして互いに独立する複数の封止構造を形成するステップと、を含み、
少なくとも前記金属バンプの周縁にシード層を形成するステップにおいて、隣接する前記金属バンプの前記シード層同士を互いに離間させることを特徴とする封止構造の成形方法。 - 少なくとも前記金属バンプの周縁にシード層を形成するステップは、
フォトレジストを前記ウェハ基板上に塗布するステップと、
露光現像プロセスによって一部の前記フォトレジストを除去することにより、複数の前記金属バンプの間に少なくとも位置する予約フォトレジストを形成するステップと、
前記金属バンプの周縁を少なくとも覆うシード層をスパッタリングプロセスによって形成するステップと、
前記予約フォトレジストと前記予約フォトレジストに位置するシード層とを除去するステップと、を含むことを特徴とする請求項5に記載の成形方法。 - 露光現像プロセスによって一部の前記フォトレジストを除去することにより予約フォトレジストを形成するステップは、
複数の開孔を有するマスクプレートを前記フォトレジスト上に置くステップと、
光線を前記複数の開孔を通過させて前記フォトレジストに照射することで露光を実施するステップと、
現像プロセスによって一部の前記フォトレジストを除去することにより、逆台形を呈する前記予約フォトレジストを形成することと、を含むことを特徴とする請求項6に記載の成形方法。 - フォトレジストを前記ウェハ基板上に塗布するステップは、
複数の前記金属バンプを被覆する前記フォトレジストを前記ウェハ基板上に塗布するステップを含むことを特徴とする請求項6に記載の成形方法。 - 露光現像プロセスによって一部の前記フォトレジストを除去することにより複数の前記金属バンプの間に少なくとも位置する予約フォトレジストを形成するステップは、
露光現像プロセスによって一部の前記フォトレジストを除去することにより、逆台形を呈する前記予約フォトレジストを形成することを含み、前記予約フォトレジストが第1予約フォトレジスト及び第2予約フォトレジストを含み、前記第1予約フォトレジストを複数の前記金属バンプの間に配置し、前記第2予約フォトレジストを前記金属バンプの前記ウェハ基板から遠く離れる側に配置することを特徴とする請求項8に記載の成形方法。 - 前記金属バンプの周縁を少なくとも覆うシード層をスパッタリングプロセスによって形成するステップは、
前記金属バンプの周縁と前記第1予約フォトレジストで覆われていないウェハ基板領域と前記第2予約フォトレジストで覆われていない金属バンプ領域と前記予約フォトレジストのウェハ基板から遠く離れる側の表面とを覆うシード層をスパッタリングプロセスによって形成することを含むことを特徴とする請求項9に記載の成形方法。
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