JP6340365B2 - フリップチップの積層のための方法 - Google Patents
フリップチップの積層のための方法 Download PDFInfo
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- JP6340365B2 JP6340365B2 JP2015521606A JP2015521606A JP6340365B2 JP 6340365 B2 JP6340365 B2 JP 6340365B2 JP 2015521606 A JP2015521606 A JP 2015521606A JP 2015521606 A JP2015521606 A JP 2015521606A JP 6340365 B2 JP6340365 B2 JP 6340365B2
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- interposer
- wafer
- tsv
- tsv interposer
- solder bumps
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- 238000000034 method Methods 0.000 title claims description 110
- 238000003475 lamination Methods 0.000 title description 9
- 229910000679 solder Inorganic materials 0.000 claims description 108
- 239000010410 layer Substances 0.000 claims description 59
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 238000004090 dissolution Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 229920002120 photoresistant polymer Polymers 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000001312 dry etching Methods 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 80
- 239000000758 substrate Substances 0.000 description 60
- 230000008569 process Effects 0.000 description 33
- 238000013459 approach Methods 0.000 description 11
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241000724291 Tobacco streak virus Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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Description
本願は、一般的にフリップチップの積層に関し、特に、スルーシリコンビア(TSV)インターポーザ、集積回路(IC)ダイおよび有機基板を含むフリップチップを積層するための方法に関する。
フリップチップの積層を実行するための従来のアプローチは、有機基板上にスルーシリコンビア(TSV)インターポーザを配置して、続けてTSVインターボーザ上に集積回路を積層してフリップチップを形成することを含む。フリップチップ積層のためのそのような従来の方法は、特定の接続方法および含まれるプロセスパラメータによって特徴付けられる。フリップチップ積層の場合の組立歩留りは、従来のフリップチップ積層の間に生じる、TSVインターポーザの反りによって大きく影響を受ける。従来のフリップチップ積層アプローチは、最終的にはICの性能および組立歩留りに影響を及ぼす、TSVインターポーザの反りの量が大きくなることをもたらす。
フリップチップの積層のための方法は、複数のキャビティとコーナーガイドの対とを備えるキャビティウェハを形成することと、キャビティウェハに、はんだバンプがその表面に結合されたスルーシリコンビア(TSV)インターポーザを、はんだバンプが複数のキャビティに位置し、TSVインターポーザはコーナーガイドの対の間に位置するように、配置することと、TSVインターポーザの別の面に、集積回路(IC)ダイを、ICダイとTSVインターポーザとはんだバンプとが積層インターポーザユニットを形成するように、配置することと、キャビティウェハから積層インターポーザユニットを取り除くことと、積層インターポーザユニットのはんだバンプを、有機基板に、積層インターポーザユニットと有機基板とがフリップチップを形成するように、接続することとを備える。
はんだバンプを有するTSVインターポーザを支持層上に配置することは、はんだバンプを接着剤の層と、分離層との両方に配置することを含むことができる。
図面は、実施例の設計および使用を図示し、その中において、同様の要素は共通の参照符号によって参照される。これらの図面は、寸法通りに描かれているとは必ずしも限らない。上述のおよび他の利点および目的がどのようにして得られるかをよりよく理解するために、実施例のより具体的な説明が、表わされるが、それらは、添付の図面とともに示される。これらの図面は、典型的な方法および構造のみを示し、したがって請求項の範囲の限定と見なされるものではない。
以後において、図面を参照してさまざまな実施例が説明される。図面は寸法通りに描かれているものではなく、同様の構造の要素または機能は、図面全体を通じて同様の参照符号によって表現される。図面は、ここにおいて説明を容易にすることを意図するのみであるということに注意すべきである。図面は、本発明の包括的な説明、または請求項に記載された発明の範囲の限定を意図するものではない。さらに、図示された実施例は、示されるすべての局面または利点を有する必要はない。ある特定の実施例とともに記述される局面または利点は、その実施例に限定される必要はなく、そのように図示されたり、あるいは明示的に説明されなかったとしても、如何なる別の実施形態においても実施可能である。また、この明細書全体を通じて参照される、「いくつかの実施形態」または「他の実施形態」は、実施例と関連して記述される特定の特徴、構造、材料または特性が、少なくとも1つの実施形態に含まれるということを意味する。したがって、この明細書全体を通じたさまざまな場所における「いくつかの実施形態において」、または「他の実施形態において」との記載は、同一の実施形態を参照するものとは必ずしも限らない。
Claims (10)
- フリップチップの積層のための方法であって、
複数のキャビティとコーナーガイドの対とを備えるウェハを形成することと、
前記ウェハに、はんだバンプがその表面に結合されたスルーシリコンビア(TSV)インターポーザを、配置することとを備え、前記TSVインターポーザが前記ウェハに配置されているときには、前記はんだバンプが前記ウェハにおける前記複数のキャビティのそれぞれに位置し、前記TSVインターポーザは前記コーナーガイドの対の間に位置し、前記はんだバンプの間の前記TSVインターポーザの部分は、前記ウェハによって機械的に支持され、
前記複数のキャビティの1つ以上を真空にして、前記TSVインタポーザを前記ウェハに対する所定の位置に保持することと、
前記TSVインターポーザの別の面に、集積回路(IC)ダイを、前記ICダイと前記TSVインターポーザと前記はんだバンプとが積層インターポーザユニットを形成するように、配置することとをさらに備え、前記ICダイを配置することは、前記複数のキャビティの1つ以上を前記真空にする間に実行され、
前記ウェハから前記積層インターポーザユニットを取り除くことと、
前記積層インターポーザユニットの前記はんだバンプを、基板に、前記積層インターポーザユニットと前記基板とがフリップチップを形成するように、接続することとをさらに備える、方法。 - 前記複数のキャビティは、前記ウェハの上面から前記ウェハの下面まで延びる、請求項1に記載の方法。
- 前記ウェハの前記下面側が真空にされ、はんだバンプを有する前記TSVインターポーザを、前記ウェハに対する定位置に保持する、請求項1に記載の方法。
- 前記複数のキャビティと前記コーナーガイドの対とを含む前記ウェハの表面に、除去可能な接着剤の層を形成することと、
前記除去可能な接着剤の層の上に、はんだバンプを有する前記TSVインターポーザを、前記除去可能な接着剤の層が、前記TSVインターポーザを、前記ウェハに対する定位置に保持するように、配置することとをさらに備える、請求項1から請求項3のいずれか1項に記載の方法。 - リフロー接続を行なって、前記集積回路ダイを、前記TSVインターポーザの他の面に接続することをさらに備える、請求項1から請求項4のいずれか1項に記載の方法。
- 前記リフロー接続が行われた後に、アンダーフィリングを行なうことをさらに備える、請求項5に記載の方法。
- 前記積層インターポーザユニットを取り除くことは、化学溶解を行なうことを含む、請求項1から請求項6のいずれか1項に記載の方法。
- 前記積層インターポーザユニットの前記はんだバンプを前記基板に接続することは、リフロー接続を行なうことを含む、請求項1から請求項7のいずれか1項に記載の方法。
- 前記複数のキャビティは、ウェハ上のフォトレジストをパターニングし、パターニングされたフォトレジストを有する前記ウェハに対して反応性イオンドライエッチングを行い、有機溶剤によって前記フォトレジストを除去することによって形成される、請求項1から請求項8のいずれか1項に記載の方法。
- 前記TSVインターポーザ上に、別の集積回路(IC)ダイを配置することをさらに備える、請求項1から請求項9のいずれか1項に記載の方法。
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