JP2021034507A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2021034507A JP2021034507A JP2019151900A JP2019151900A JP2021034507A JP 2021034507 A JP2021034507 A JP 2021034507A JP 2019151900 A JP2019151900 A JP 2019151900A JP 2019151900 A JP2019151900 A JP 2019151900A JP 2021034507 A JP2021034507 A JP 2021034507A
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Abstract
Description
本願において、実施の態様の記載は、必要に応じて、便宜上複数のセクション等に分けて記載するが、特にそうでない旨明示した場合を除き、これらは相互に独立別個のものではなく、記載の前後を問わず、単一の例の各部分、一方が他方の一部詳細または一部または全部の変形例等である。また、原則として、同様の部分は繰り返しの説明を省略する。また、実施の態様における各構成要素は、特にそうでない旨明示した場合、理論的にその数に限定される場合および文脈から明らかにそうでない場合を除き、必須のものではない。
まず、本実施の形態の半導体パッケージPKG1の構成例について、図1〜図3を用いて説明する。図1は本実施の形態の半導体パッケージの上面図である。また、図2は、図1のA−A線に沿った断面図である。
次に、図2に示す半導体チップCPの詳細について説明する。図3は、図2に示す半導体チップを表面側から視た平面図である。図4は、図3に示すA部の拡大平面図である。図5は、図4に示すボンディングパッドと下層の配線層に形成された配線との位置関係を示す透視平面図である。図6は、図4のA−A線に沿った拡大断面図である。図7は、図5に示す配線層の1つ下層の配線層を示す透視平面図である。図8は、図4のB−B線に沿った拡大断面図、図9は図4のC−C線に沿った拡大断面図である。図5は、図6に示す配線層CL2の平面図であるが、配線層CL2に形成される配線と、ボンディングパッドPDおよびボンディング領域PDr1との平面的な位置関係を明示するため、これらの輪郭を点線で示している。図7は、図6に示す配線層CL3の平面図であるが、配線層CL3に形成される配線と、配線層CL2に形成される配線との平面的な位置関係を明示するため、配線層CL2に形成される配線の輪郭を点線で示している。図8および図9では、図6に示す複数の配線層CLのうち、配線層CL1〜CL3の各層を示し、配線層CL4〜CL10の各層は図示を省略している。
半導体チップCPの高機能化に伴って基準電位の供給経路は、例えば、種々の配線経路中に含まれるノイズ成分を低減する経路(すなわち、信号伝送経路のリターンパス)として、あるいは、半導体装置の内部または外部からの電磁気的なノイズの伝搬を抑制する電磁シールドとして機能する。上記した機能の特性を向上させる観点から、基準電位の供給経路のインピーダンスを低減させることが好ましい。本実施の形態では、基準電位の供給経路のインピーダンスを低減し、上記に例示したような基準電位の供給経路の機能の特性強化を実現する構造について説明する。
次に、図1に示す半導体パッケージPKG1の製造方法について、説明する。本実施の形態の半導体パッケージPKG1は、図12に示す組立てフローに沿って製造される。図12は、本実施の形態の半導体パッケージの組み立てフローを示す説明図である。
また、図12に示す半導体チップ準備工程では、図3〜図11を用いて説明した半導体チップCPを準備する。本工程では、例えば、シリコンからなる半導体ウエハ(図示は省略)の主面SSt(図6参照)に、複数の半導体素子Q1(図6参照)やこれに電気的に接続される配線層CL(図6参照)からなる半導体ウエハを準備する。また、図6に示す配線層CLの最上層には、複数のボンディングパッドPD(図3参照)が形成される。
次に、図12に示すダイボンド工程(半導体チップ搭載工程)では、図2に示すように、ダイパッドDPに半導体チップCPを搭載する。半導体チップCPは、複数のボンディングパッドPDが形成された表面CPtおよび表面CPtの反対側に位置する裏面CPbを有している。本工程では、ダイボンド材DBを介して、半導体チップCPの裏面CPbとダイパッドDPとを接着固定する。半導体チップCPは、裏面CPbがダイパッドDPのチップ搭載面である上面DPtと対向するように、所謂、フェイスアップ実装方式によりダイパッドDP上に搭載される。ダイボンド材DBは、半導体チップCPとダイパッドDPとを接着固定する接着用の部材である。ダイボンド材DBとして、樹脂接着材あるいは半田材などを例示できる。
次に、図12に示すワイヤボンド工程では、図2に示すように、半導体チップCPの表面CPtに形成された複数のボンディングパッドPDと、半導体チップCPの周囲に配置された複数のリードLDとを、複数のワイヤ(導電性部材)BWを介して、それぞれ電気的に接続する。図13は、図4に示すボンディング領域にワイヤを接合した状態を示す拡大平面図である。図14は、図13のA−A線に沿った拡大断面図である。
次に、図12に示す封止工程では、図2に示す半導体チップCP、複数のワイヤBW、および複数のリードLDのそれぞれのインナリード部ILDを樹脂により封止し、封止体MRを形成する。
次に、図12に示すリード成形工程では、図2に示すように、複数のリードLDのそれぞれを成形する。本工程では、アウタリード部OLDを切断し、リードフレームから複数のリードLDのそれぞれを切り離す。これにより、複数のリードLDのそれぞれは、互いに分離される。また、本工程では、リードLDを切断した後、複数のリードLDを成形し、図2に示すような曲げ加工を施す。
次に、図12に示す個片化工程では、図2に示すダイパッドDPを支持する複数の吊りリード(図示は省略)をそれぞれ切断して、半導体パッケージを分離する。
上記したように、既にいくつかの変形例について説明したが、以下では、上記した変形例以外の代表的な変形例について説明する。図15は、図10に対する変形例を示す拡大平面図である。図15に示す半導体チップCP2は、透視平面視において、複数の配線CW1のそれぞれが、ボンディングパッドPD1のボンディング領域PDr1と重なり、かつ、複数の第2列目ボンディングパッドPDL2のボンディング領域PDr1のそれぞれとは重ならない位置に配置される点で、図10に示す半導体チップCPと相違する。
図16は、図5に対する変形例を示す拡大平面図である。図16では、複数の配線CW1とボンディング領域PDr1に接合されたボール部BWBとの平面的な位置関係を明示するため、図4に示すボンディングパッドPDの輪郭、開口部PVkの輪郭、およびボール部BWBの輪郭を点線で示している。
BWB ボール部(導電性部材)
CIL 絶縁層
CL,CL1,CL2,CL3,CL4,CL5,CL6,CL7,CL8,CL9,CL10 配線層
CP,CP2,CP3 半導体チップ(半導体装置)
CPb 裏面
CPs1,CPs2,CPs3,CPs4 辺
CPt 表面(上面、主面)
CVW ビア
CW1,CW2,CW3,CW4,CW5,CW6,CW7 配線
CWg1 配線群
CWP 導体パターン
DB ダイボンド材(接着材)
DP ダイパッド(チップ搭載部)
DPt 上面(主面、チップ搭載面)
FNL ファイン層
GBL グローバル層
ILD インナリード部
LD リード(端子、外部端子)
MR 封止体(樹脂体)
MRb 下面(裏面、被実装面)
MRs 側面
MRt 上面
OLD アウタリード部
P1 離間距離(間隔)
PD,PD1,PD2,PD3,PD4,PDg,PDL1,PDL2,PDs,PDv ボンディングパッド
PDr1 ボンディング領域
PDr2 プロービング領域
PKG1 半導体パッケージ(半導体装置)
PV 絶縁膜(保護膜)
PVk 開口部
Q1 半導体素子
R1,R2 領域
SS 半導体基板
SSt 主面
W1,W2,W3,W4,W5,W6 幅
Claims (23)
- 第1方向に延びる第1辺を備えた主面を有する半導体基板と、
前記半導体基板の前記主面上に積層された複数の配線層と、
前記複数の配線層のうち、最上層に設けられた第1配線層を覆う保護膜と、
前記第1配線層に形成された複数のボンディングパッドと、
前記第1配線層の1つ下の層に設けられた第2配線層に形成され、電源電位が供給される複数の第1配線と、
前記第2配線層に形成され、基準電位が供給される第2配線と、
を有し、
前記複数のボンディングパッドのそれぞれは、前記保護膜に形成された開口部において、前記保護膜から露出するボンディング領域を備え、
前記複数のボンディングパッドは、前記主面の前記第1辺に沿って配列された第1ボンディングパッドおよび第2ボンディングパッドを含み、
前記保護膜の上面側から視た透視平面視において、
前記複数の第1配線のそれぞれは、互いに隣り合い、かつ、前記第1ボンディングパッドの前記ボンディング領域と重なる位置において前記第1方向と交差する第2方向に延びるように配置され、
前記第2配線は、前記第2配線層のうち、前記第1ボンディングパッドと前記第2ボンディングパッドとの間の第1領域と重なる位置において前記複数の第1配線のいずれかに沿って延びるように配置され、
前記複数の第1配線のそれぞれの幅は、前記第2配線の幅より狭い、半導体装置。 - 請求項1において、
前記第2配線層には、前記複数の第1配線のいずれかに沿って延びる複数の前記第2配線が形成され、
互いに隣り合うように配置された前記複数の第1配線は、複数の前記第2配線の間に挟まれた、半導体装置。 - 請求項2において、
前記透視平面視において、
前記第1ボンディングパッドおよび前記第2ボンディングパッドのそれぞれの前記ボンディング領域と重なる位置には、前記複数の第1配線が配置され、
前記第1ボンディングパッドの前記ボンディング領域の両隣、および前記第2ボンディングパッドの前記ボンディング領域の両隣には、それぞれ、前記複数の第1配線のいずれかに沿って延びる前記第2配線が配置された、半導体装置。 - 請求項3において、
前記第1ボンディングパッドは、前記第1ボンディングパッドの前記ボンディング領域と重なる位置に配置される前記複数の第1配線のそれぞれと電気的に接続され、
前記第2ボンディングパッドは、前記第2配線と電気的に接続され、かつ、前記第2ボンディングパッドの前記ボンディング領域と重なる位置に配置された前記複数の第1配線と電気的に分離された、半導体装置。 - 請求項4において、
前記複数の配線層は、前記第2配線層の1つ下の層に設けられた第3配線層を含み、
前記第3配線層には、前記電源電位が供給され、かつ、前記透視平面視において前記複数の第1配線および前記第2配線のそれぞれと交差するように前記第1辺に沿って延び、かつ、前記複数の第1配線と電気的に接続された第3配線が配置され、
前記第1ボンディングパッドおよび前記第2ボンディングパッドのそれぞれの前記ボンディング領域と重なる位置に配置される前記複数の第1配線のそれぞれは、前記第3配線を介して互いに電気的に接続された、半導体装置。 - 請求項2において、
前記複数の配線層は、前記第2配線層の1つ下の層に設けられた第3配線層を含み、
前記第3配線層は、
前記電源電位が供給され、かつ、前記透視平面視において前記複数の第1配線および複数の前記第2配線のそれぞれと交差するように前記第1辺に沿って延び、かつ、前記複数の第1配線と電気的に接続された第3配線と、
前記基準電位が供給され、かつ、前記透視平面視において前記複数の第1配線および複数の前記第2配線のそれぞれと交差するように前記第1辺に沿って延び、かつ、複数の前記第2配線と電気的に接続された第4配線と、
を有する、半導体装置。 - 請求項6において、
前記第3配線の幅および前記第4配線の幅は、前記複数の第1配線のそれぞれの幅より広い、半導体装置。 - 請求項1において、
前記複数のボンディングパッドは、
前記第1ボンディングパッドおよび前記第2ボンディングパッドを含み、前記第1辺に沿って配列された複数の第1列目ボンディングパッドと、
前記複数の第1列目ボンディングパッドより前記第1辺から遠い位置に配列された複数の第2列目ボンディングパッドと、
を含む、半導体装置。 - 請求項8において、
前記第2配線層には、前記複数の第1配線のいずれかに沿って延びる複数の前記第2配線が形成され、
互いに隣り合うように配置された前記複数の第1配線は、複数の前記第2配線の間に挟まれ、
前記複数の配線層は、前記第2配線層の1つ下の層に設けられた第3配線層を含み、
前記第3配線層には、
前記基準電位が供給され、かつ、前記透視平面視において前記複数の第1配線および複数の前記第2配線のそれぞれと交差するように前記第1辺に沿って延び、かつ、複数の前記第2配線と電気的に接続され、かつ、前記複数の第1列目ボンディングパッドと重なる第4配線と、
前記基準電位が供給され、かつ、前記透視平面視において前記複数の第1配線および複数の前記第2配線のそれぞれと交差するように前記第1辺に沿って延び、かつ、複数の前記第2配線と電気的に接続され、かつ、前記複数の第2列目ボンディングパッドと重なる第5配線と、
が配置される、半導体装置。 - 請求項9において、前記第4配線の幅および前記第5配線の幅のそれぞれは、前記複数の第1配線のそれぞれの幅より広い、半導体装置。
- 請求項10において、
前記複数の第2列目ボンディングパッドは、前記複数の第1配線を介して前記第1ボンディングパッドと電気的に接続された第3ボンディングパッドを含み、
前記透視平面視において、前記複数の第1配線のそれぞれは、前記第1ボンディングパッドの前記ボンディング領域および前記第3ボンディングパッドの前記ボンディング領域のそれぞれと重なる位置に、前記第2方向に延びるように配置された、半導体装置。 - 請求項10において、
前記透視平面視において、前記複数の第1配線のそれぞれは、前記第1ボンディングパッドの前記ボンディング領域と重なり、かつ、前記複数の第2列目ボンディングパッドの前記ボンディング領域のそれぞれとは重ならない位置に配置された、半導体装置。 - 請求項8において、
前記第1ボンディングパッドの前記ボンディング領域と重なる位置に配置される前記複数の第1配線のそれぞれは、前記第1ボンディングパッドおよび前記複数の第2列目ボンディングパッドのいずれかと電気的に接続された、半導体装置。 - 請求項1において、
互いに隣り合って配置される前記複数の第1配線の離間距離は、前記複数の第1配線の幅以下である、半導体装置。 - 請求項1において、
前記複数の第1配線のそれぞれの幅は、1.0μm以下であり、かつ、互いに隣り合う第1配線の離間距離は、0.55μm以下である、半導体装置。 - 請求項1において、
前記透視平面視において、前記第2配線は、前記第1および第2ボンディングパッドの少なくとも一方と重なり、かつ、前記第1および第2ボンディングパッドのそれぞれが備える前記ボンディング領域と重ならない、半導体装置。 - 請求項1において、
前記第1および第2ボンディングパッドのそれぞれには、導電性部材が接合され、
前記透視平面視において、前記第2配線は、前記第1および第2ボンディングパッドの少なくとも一方と重なり、かつ、前記第1および第2ボンディングパッドのそれぞれに接続された前記導電性部材の接合面と重ならない、半導体装置。 - 主面を有する半導体基板と、
前記半導体基板の前記主面上に積層された複数の配線層と、
前記複数の配線層を覆う保護膜と、
を含み、
前記複数の配線層のうちの最上層に位置する第1配線層は、複数のボンディングパッドを有し、
前記複数のボンディングパッドのそれぞれは、ボンディング領域を有し、
前記ボンディング領域は、前記保護膜に形成された開口部において、前記保護膜から露出され、
前記複数の配線層のうち、前記第1配線層の1つ下の第2配線層は、
前記保護膜の上面側から視た透視平面視において前記ボンディング領域と重なる第1領域に位置する複数の第1配線と、
前記保護膜の上面側から視た透視平面視において前記ボンディング領域とは重ならない第2領域に位置する複数の第2配線と、
を有し、
前記複数の第1配線のそれぞれの幅は、前記複数の第2配線のそれぞれの幅よりも細く、
互いに隣り合う前記複数の第1配線の間隔は、前記複数の第1配線のそれぞれの前記幅より狭い、あるいは、同じであり、
前記複数の第1配線のそれぞれには、電源電位が供給され、
前記複数の第2配線のそれぞれには、基準電位が供給される、半導体装置。 - 請求項18において、
前記複数のボンディングパッドのそれぞれは、前記ボンディング領域と、プローブ領域と、を有し、
前記ボンディング領域および前記プローブ領域のそれぞれは、前記保護膜に形成された前記開口部において、前記保護膜から露出され、
前記第2配線層は、
前記保護膜の上面側から視た透視平面視において前記ボンディング領域および前記プローブ領域のそれぞれと重なる前記第1領域に位置する前記複数の第1配線と、
前記保護膜の上面側から視た透視平面視において前記ボンディング領域および前記プローブ領域のそれぞれとは重ならない前記第2領域に位置する前記複数の第2配線と、
を有する、半導体装置。 - 請求項19において、
前記半導体基板の前記主面は、第1方向に延びる第1辺を備えており、
前記複数の配線層のうち、前記第2配線層の1つ下の第3配線層は、
前記保護膜の上面側から視た透視平面視において前記第1辺に沿って延び、かつ、前記電源電位が供給される第3配線と、
前記保護膜の上面側から視た透視平面視において前記第1辺に沿って延び、かつ、前記基準電位が供給される第4配線と、
前記保護膜の上面側から視た透視平面視において前記第1辺に沿って延び、かつ、前記基準電位が供給される第5配線と、
を有し、
前記保護膜の上面側から視た透視平面視において、前記第3配線は、前記第4配線と前記第5配線の間に配置され、
前記複数の第1配線および前記複数の配線層のうちの前記第3配線層よりも下の配線層が有する配線のそれぞれの幅は、前記複数の第2配線、前記第3配線、前記第4配線および前記第5配線のそれぞれの幅よりも細く、
前記複数の第2配線のそれぞれは、前記保護膜の上面側から視た透視平面視において前記第1方向と交差する第2方向に延び、
前記第4配線は、少なくとも前記複数の第2配線のうちの1つを介して、前記第5配線と電気的に接続されている、半導体装置。 - 請求項20において、
前記複数のボンディングパッドは、
前記第1辺に沿って配列された複数の第1列目ボンディングパッドと、
前記第1辺に沿って配列され、かつ、前記複数の第1列目ボンディングパッドより前記第1辺から遠い位置に配列された複数の第2列目ボンディングパッドと、
を有し、
前記複数の第1列目ボンディングパッドは、
前記複数の第1配線のそれぞれと電気的に接続される第1ボンディングパッドと、
少なくとも前記複数の第2配線のうちの前記1つと電気的に接続される第2ボンディングパッドと、
を有し、
前記複数の第2列目ボンディングパッドは、
前記複数の第1配線のそれぞれと電気的に接続される第3ボンディングパッドと、
少なくとも前記複数の第2配線のうちの前記1つと電気的に接続される第4ボンディングパッドと、
を有する、半導体装置。 - 請求項21において、
前記第2領域は、前記保護膜の上面側から視た透視平面視において、互いに隣り合う前記複数の第1列目ボンディングパッドの間に位置する領域と重なる領域であり、
前記複数の第1配線は、前記第2配線層のうちの前記第1領域および前記第2領域以外の領域において、互いに接続されている、半導体装置。 - 請求項21において、
前記第2領域は、前記保護膜の上面側から視た透視平面視において、互いに隣り合う前記複数の第1列目ボンディングパッドの間に位置する領域と重なる領域であり、
前記複数の第2配線は、前記第2配線層のうちの前記第1領域および前記第2領域以外の領域において、互いに接続されている、半導体装置。
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