JP7045891B2 - 半導体製造方法、半導体製造装置及び半導体装置 - Google Patents
半導体製造方法、半導体製造装置及び半導体装置 Download PDFInfo
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- JP7045891B2 JP7045891B2 JP2018053369A JP2018053369A JP7045891B2 JP 7045891 B2 JP7045891 B2 JP 7045891B2 JP 2018053369 A JP2018053369 A JP 2018053369A JP 2018053369 A JP2018053369 A JP 2018053369A JP 7045891 B2 JP7045891 B2 JP 7045891B2
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Description
前記半導体チップ又は前記積層体の実装処理の最中に、所定の条件を満たしたか否かを判定するステップと、
前記所定の条件を満たすと判定された場合に、それまでに前記支持基板上に実装された前記半導体チップ又は前記積層体を前記支持基板を含めて退避させるステップと、
前記待避後に、前記半導体チップ又は前記積層体の実装処理を再開するか否かを判定するステップと、
前記実装処理を再開すると判定されたときに、前記退避された前記半導体チップ又は前記積層体を退避前の位置に戻して前記実装処理を継続するステップと、を備える、半導体製造方法が提供される。
図1は第1の実施形態による半導体製造装置1の制御系の概略構成を示すブロック図である。図1の半導体製造装置1は、ステージ上に載置された支持基板上に、複数の半導体チップを積層させた積層体を作製するものである。作製された積層体は、後述するように、一つのパッケージに収納される。図1の半導体製造装置1は、条件判定部2と、退避制御部3と、再開判定部4と、復帰制御部5とを備えている。
第2の実施形態は、半導体チップ16、又は支持基板15がステージ11上に搬送されてから一定の設定時間が経過すると退避するものである。
第3の実施形態は、実装処理を行う装置が停止してから一定の設定時間が経過すると、実装途中の半導体チップ群20を退避させるものである。
第4の実施形態は、実装処理を停止すると判定されたときに、最後に積層された半導体チップ16の搭載位置ずれを検出した後、実装途中の半導体チップ群20を退避させるものである。
一方、退避前に位置ずれ量を算出する場合、搬送ずれの影響を受けずに位置ずれ量を算出することができる。
第5の実施形態は、例えば最下段の半導体チップ16上のアライメントマーク19を基準として位置ずれを検出するものである。
第5の実施形態は、半導体チップ16を積層する際に、例えば最下段の半導体チップ16の基準座標との位置ずれ量を算出しているが、最下段の半導体チップ16のアライメントマーク19は、その上に別の半導体チップ16を積層すると、その陰になってカメラ12で認識できなくなる。このため、半導体チップ群20を退避後に元の位置に戻す際に、基準座標の搬送ずれ量を直接算出できなくなる。そこで、第6の実施形態は、常にカメラ12で認識できる位置に、別のアライメントマーク21を設けるものである。
次に、基準座標n1を補正基準座標n1’に置換し(ステップS131)、ステップS117以降の処理を行う。
上述した第1~第6の実施形態では、支持基板15上に複数の半導体チップ16を積層する例を説明したが、予め複数の半導体チップ16が積層された積層体を支持基板15上に実装する場合や、この積層体の上に、1つ以上の半導体チップ16を積層する場合にも適用可能である。支持基板15は、配線を有する有機あるいは無機材料からなる基板、シリコンを材料とする支持体、リードフレームでもよい。また、支持基板15やリードフレーム上に配置される粘着性のテープ上に複数の半導体チップ16や積層体を実装する場合にも適用可能である。
上述した第6の実施形態による半導体製造装置1を用いて、複数の半導体チップを積層させた積層体をパッケージングする処理手順について、より詳細に説明する。図13は第8の実施形態を説明する図である。
Claims (13)
- ステージ上に載置された支持基板上に、半導体チップ又は半導体チップの積層体を実装する半導体製造方法であって、
前記半導体チップ又は前記積層体の実装処理の最中に、所定の条件を満たしたか否かを判定するステップと、
前記所定の条件を満たすと判定された場合に、それまでに前記支持基板上に実装された前記半導体チップ又は前記積層体を前記支持基板を含めて退避させるステップと、
前記退避後に、前記半導体チップ又は前記積層体の実装処理を再開するか否かを判定するステップと、
前記実装処理を再開すると判定されたときに、前記退避された前記半導体チップ又は前記積層体を退避前の位置に戻して前記実装処理を継続するステップと、を備える、半導体製造方法。 - 前記所定の条件を満たしたか否かを判定するステップは、前記実装処理を行う装置が停止するか否かを判定し、
前記退避させるステップは、前記装置が停止したと判定された場合に、前記半導体チップ又は前記積層体を退避させる、請求項1に記載の半導体製造方法。 - 前記所定の条件を満たしたか否かを判定するステップは、
前記半導体チップ又は前記積層体が実装される前記支持基板を実装処理を行うステージ上に搬送してからの経過時間、又は、前記ステージ上に実装してからの経過時間を計測するステップと、
前記経過時間が第1設定時間以上か否かを判定するステップと、を有し、
前記退避させるステップは、前記経過時間が前記第1設定時間以上と判定されると、前記半導体チップ又は前記積層体を退避させる、請求項1に記載の半導体製造方法。 - 前記所定の条件を満たしたか否かを判定するステップは、
前記実装処理を行う装置が停止してからの経過時間を計測するステップと、
前記経過時間が第1設定時間以上か否かを判定するステップと、を有し、
前記退避させるステップは、前記経過時間が前記第1設定時間以上と判定されると、前記半導体チップ又は前記積層体を退避させる、請求項1に記載の半導体製造方法。 - 前記実装処理を再開すると判定された場合に、個々の半導体チップが前記ステージ上に留まっていた累計時間を計測するステップと、
前記累計時間が第2設定時間以内か否かを判定するステップと、を備え、
前記実装処理を継続するステップは、前記累計時間が前記第2設定時間以内であれば、前記半導体チップ又は前記積層体を退避前の位置に戻して前記実装処理を継続し、前記累計時間が前記第2設定時間を超えていれば、前記半導体チップ又は前記積層体を搬出する、請求項3又は4に記載の半導体製造方法。 - 前記半導体チップ又は前記積層体は、積層された複数の前記半導体チップを含む半導体チップ群を有し、
積層された複数の前記半導体チップのうち、最後に積層された半導体チップ上の搭載座標と、その直前に積層された半導体チップ上の基準座標との位置ずれ量を検出するステップと、
前記検出された位置ずれ量が所定範囲内か否かを判定するステップと、を備え、
前記実装処理を行う装置が停止すると判定された場合、前記退避させるステップは、前記位置ずれ量を検出した後に前記半導体チップ群を退避させ、前記検出された位置ずれ量が前記所定範囲を超えていれば、前記位置ずれ量を検出した後に前記半導体チップ群を退避させるとともに、所定の警告処理を行う、請求項1乃至5のいずれか一項に記載の半導体製造方法。 - 前記半導体チップ又は前記積層体は、積層されたm個(mは2以上の整数)の半導体チップを含む半導体チップ群を有し、
前記積層されたm個の半導体チップのうち、n段目(nは1以上かつm未満の整数)に積層された半導体チップ上の基準座標と、m段目に積層された半導体チップ上の搭載座標との位置ずれ量を検出するステップと、
前記検出された位置ずれ量が所定範囲内か否かを判定するステップと、を備え、
前記実装処理を行う装置が停止すると判定された場合、前記退避させるステップは、前記位置ずれ量を検出した後に前記半導体チップ群を退避させ、前記検出された位置ずれ量が前記所定範囲を超えていれば、前記半導体チップ群を退避させるとともに、所定の警告処理を行う、請求項1乃至5のいずれか一項に記載の半導体製造方法。 - 前記実装処理を継続するステップは、前記退避前における前記m段目に積層された半導体チップ上の搭載座標と、前記退避後に退避前の位置に戻された前記m段目に積層された半導体チップ上の搭載座標との搬送ずれ量を検出し、前記搬送ずれ量に基づいて前記n段目に積層された半導体チップ上の前記基準座標を補正し、補正された前記基準座標と(m+1)段目以降に積層される半導体チップ上の搭載座標との位置ずれ量を検出しつつ、前記補正された基準座標に基づいて(m+1)段目以降の半導体チップを積層する、請求項7に記載の半導体製造方法。
- 前記半導体チップ又は前記積層体は、積層されたm個(mは2以上の整数)の半導体チップを含む半導体チップ群を有し、
前記半導体チップ又は前記積層体のうち最下段の半導体チップを前記ステージ上で支持する支持基板、又は前記最下段の半導体チップは、前記半導体チップ群の積層中に前記支持基板の上方から視認されうる位置に設けられる第1基準指標を有し、
前記最下段の半導体チップは、前記半導体チップ群の積層中に前記支持基板の上方から視認不可の位置に設けられる第2基準指標と、を有し、
前記第1基準指標及び前記第2基準指標の座標を検出するステップと、
前記m段目に積層された半導体チップ上の搭載座標と、前記第2基準指標に基づく基準座標との位置ずれ量を検出するステップと、
前記検出された位置ずれ量が所定範囲内か否かを判定するステップと、を備え、
前記実装処理を行う装置が停止すると判定された場合、前記退避させるステップは、前記位置ずれ量を検出した後に前記半導体チップ群を退避させ、前記検出された位置ずれ量が前記所定範囲を超えていれば、前記半導体チップ群を退避させるとともに、所定の警告処理を行う、請求項1乃至5のいずれか一項に記載の半導体製造方法。 - 前記位置ずれ量を検出するステップは、前記退避後に前記実装処理を継続する際には、前記退避前の前記第1基準指標の位置と、前記退避後に元の位置に戻した後の前記第1基準指標の位置との搬送ずれ量を検出し、前記搬送ずれ量に基づいて前記基準座標を補正し、前記補正された基準座標と、(m+1)段目以降に積層される半導体チップ上の搭載座標との位置ずれ量を検出する、請求項9に記載の半導体製造方法。
- ステージ上で複数の半導体チップを位置合わせしながら順に積層する半導体製造装置であって、
前記複数の半導体チップの実装処理の途中で、所定の条件を満たしたか否かを判定する条件判定部と、
前記所定の条件を満たすと判定された場合に、それまでに積層された半導体チップ群を退避させる退避制御部と、
前記所定の条件を満たすと判定された後に、前記実装処理を再開するか否かを判定する再開判定部と、
前記実装処理を再開すると判定されたときに、前記退避された半導体チップ群を退避前の位置に戻して前記実装処理を継続する復帰制御部と、を備える、半導体製造装置。 - n(nは2以上の整数)段の半導体チップを備え、
前記n段のうち2段目以降の半導体チップのそれぞれは、
1段下の半導体チップとの接続のためのパッドと、
1段下の半導体チップと位置合わせするための第1アライメントマークとを有し、
前記n段のうち最下段の半導体チップは、前記n段の半導体チップの積層体と上下に重ならない位置に配置される第2アライメントマークを有し、
前記半導体チップの積層方向から見たとき、前記最下段の半導体チップの外辺の少なくとも一部が、前記n段のうち2段目以降の半導体チップと重なる、半導体装置。 - 前記最下段の半導体チップは、半導体チップの積層方向から見たとき、前記n段のうち2段目以降の半導体チップと重なる第3アライメントマークを有する請求項12に記載の半導体装置。
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