JP6336293B2 - 電圧生成装置 - Google Patents
電圧生成装置 Download PDFInfo
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- JP6336293B2 JP6336293B2 JP2014032003A JP2014032003A JP6336293B2 JP 6336293 B2 JP6336293 B2 JP 6336293B2 JP 2014032003 A JP2014032003 A JP 2014032003A JP 2014032003 A JP2014032003 A JP 2014032003A JP 6336293 B2 JP6336293 B2 JP 6336293B2
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- circuit component
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- semiconductor substrate
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- 239000004065 semiconductor Substances 0.000 claims description 258
- 239000000758 substrate Substances 0.000 claims description 103
- 230000015572 biosynthetic process Effects 0.000 claims description 60
- 239000003990 capacitor Substances 0.000 claims description 40
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- 229910000679 solder Inorganic materials 0.000 claims description 10
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 91
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 239000004020 conductor Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
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- G01—MEASURING; TESTING
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Description
この発明の一実施形態では、前記外部接続部材は、入力電圧が入力される入力電圧端子と、グランド電位に接続されるグランド端子と、出力電圧が出力される出力端子とを含む。前記素子は、前記入力電圧端子と前記グランド端子との間に直列に接続された第1トランジスタおよび第2トランジスタを含む。前記半導体チップは、さらに、前記第1トランジスタおよび前記第2トランジスタを制御する制御回路を有する。前記回路部品は、前記第1トランジスタおよび前記第2トランジスタの接続点と前記出力端子との間に接続されるインダクタチップを含む。この発明の一実施形態では、前記第1トランジスタまたは前記第2トランジスタの直上に前記インダクタチップが配置されている。
この発明の一実施形態では、前記半導体チップが、前記半導体基板の前記素子形成領域を回避して当該半導体基板の表面と裏面との間を貫通し、前記表面および裏面の間に導電路を形成する貫通ビアをさらに有する。
この発明の一実施形態では、前記半導体チップの回路部品接続面に形成され、前記素子形成領域に形成された回路を前記回路部品の電極に接続する第2表面配線層をさらに含む。
この発明の一実施形態では、前記半導体チップの回路部品接続面に形成され、前記回路部品の電極を前記半導体チップの回路部品接続面に実装された他の回路部品に接続する第4表面配線層をさらに含む。
この発明の一実施形態では、前記外部接続部材が前記貫通ビアの直下に配置されている。
この発明の一実施形態では、前記半導体チップの回路部品接続面を覆う絶縁層をさらに含む。
この発明の一実施形態では、前記絶縁層が、ポリイミド膜、酸化膜またはソルダーレジスト膜である。
この発明の一実施形態では、前記絶縁層の厚さが10μm以上である。
この発明の一実施形態では、平面視において、前記回路部品の電極が、前記素子形成領域を回避して配置されている。
この発明の一実施形態では、前記貫通ビアが、前記素子形成領域に取り囲まれている。
この発明の一実施形態では、前記回路部品が、キャパシタチップ、インダクタチップ、ICチップ、抵抗器チップ、ダイオードチップ、発光ダイオード素子、センサ素子、またはMEMS素子を含む。
この発明の一実施形態では、前記半導体基板がSOI(Silicon on Insulator)基板である。
この発明の一実施形態では、前記回路部品が、前記出力端子と前記グランド端子との間に接続された第2キャパシタチップを含む。
図1は、この発明の一実施形態に係る半導体装置の全体構成例を示す斜視図である。この半導体装置1は、半導体チップ2と、回路部品C1,C2,Lとを含む。半導体チップ2は、半導体基板3を含む。半導体基板3の表面3aには、多層配線層6が形成されている。半導体基板3の表面3aとは、素子が作り込まれた素子形成領域を有する側の表面である。多層配線層6は、保護用の絶縁膜20で覆われている。
表面配線層50は、素子形成領域4に形成された素子101等を含む回路と貫通ビア9に接続された表面電極27,28との間をそれぞれ接続する素子−貫通ビア間表面配線層51,52,55(第1表面配線層)を含む。また、表面配線層50は、インダクタチップLに接続された表面電極26と素子形成領域4内の素子102等を含む回路とを接続するためのインダクタ−素子間表面配線層53(第2表面配線層)を含む。また、表面配線層50は、キャパシタチップC1に接続された表面電極21と素子形成領域4内の素子104等を含む回路とを接続するためのキャパシタ−素子間表面配線層54(第2表面配線層)を含む。さらに、表面配線層50は、インダクタチップLに接続された表面電極25とキャパシタチップC2に接続された表面電極23とを接続するためのインダクタ−キャパシタ間表面配線層55(第4表面配線層)を含む。この表面配線層55は、素子−貫通ビア間表面配線層(第1表面配線層)としての機能と、インダクタ−キャパシタ間表面配線層(第4表面配線層)としての機能とを有している。さらに、表面配線層50は、キャパシタチップC1,C2にそれぞれ接続された表面電極22,24間を接続するためのキャパシタ−キャパシタ間表面配線層56(第4表面配線層)を含む。
図6は、半導体装置1の電気的構成例を説明するための電気回路図である。半導体装置1は、素子形成領域4に形成された素子101〜104を含む集積回路70と、集積回路70に接続されたインダクタチップLおよびキャパシタチップC1,C2を含み、たとえば電源電圧生成回路を構成している。
さらに、集積回路70の電圧入力端子T3には、多層配線層6および表面配線層50ならびに貫通ビア9で形成された電気経路73を介して外部接続端子P3が接続されている。また、集積回路70のスイッチング端子T4には、多層配線層6および表面配線層50を介してインダクタチップLの一方の端子(電極16)が接続されている。インダクタチップLの他方の端子(電極15)は、表面配線層50および貫通ビア9などで形成された電気経路74を介して外部接続端子P4に接続されている。そして、集積回路70のグランド端子T5には、多層配線層6および表面配線層50ならびに貫通ビア9で形成された電気経路75を介して外部接続端子P5が接続されている。集積回路70のフィードバック端子T6は、多層配線層6および表面配線層50などで形成された電気経路76を介して、インダクタチップLの前記他方の端子(電極15)に接続されている。
貫通ビア9は素子形成領域4を回避して配置されるが、回路部品C1,C2,Lは貫通ビア9の一部または全部と重なり合うように配置することもできる。それにより、回路部品C1,C2,Lと貫通ビア9との間の距離が短くなるので、それらの間の電気経路の抵抗を低くできる。より具体的には、この実施形態では、回路部品C1,C2,Lの電極11,12,15が貫通ビア9の直上に配置されている。これにより、回路部品C1,C2,Lと貫通ビア9との間の電気経路長を最小化できる。
さらに、この実施形態では、半導体チップ2の回路部品接続面10が絶縁膜20によって覆われている。それにより、半導体チップ2を充分に保護することができる。それとともに、回路部品接続面10に設けられた表面配線層50を絶縁膜20で被覆することができるので、半導体装置1の信頼性を高めることができる。
また、この実施形態では、平面視において素子形成領域4と少なくとも一部が重なり合うように回路部品C1,C2,Lが回路部品接続面10に実装されている。これにより、半導体装置1の平面視における大きさを小さくできるから、半導体装置1が実装される配線基板上における当該半導体装置1の占有面積を小さくできる。
また、この実施形態では、貫通ビア9が、素子形成領域4よりも半導体基板3の周縁に近い領域に配置されている。これにより、半導体基板3の中央領域を素子形成領域4として確保する一方で、貫通ビア9を素子形成領域4から離して配置できる。それにより、貫通ビア9を形成する際に素子形成領域4を保護できるので、安定した特性の半導体装置1を提供できる。
複数個の半導体装置1が、半導体ウエハの状態で一括して作製される。まず、半導体基板3に対応する半導体ウエハの表面の素子形成領域4に素子が形成され、さらに多層配線層6が形成される。その後、たとえばTSVからなる貫通ビア9が素子形成領域4を回避して形成される。次に、表面配線層50および表面電極21〜28が多層配線層6の表面(回路部品接続面10)に形成される。そして、回路部品C1,C2,Lを接続するための表面電極21〜26を露出させる開口を有する絶縁膜20が形成される。次いで、回路部品接続面10上に、回路部品C1,C2,Lが自動実装される。具体的には、電極位置に半田が印刷され、自動実装機によって回路部品C1,C2,Lが配置される。次いで、半導体ウエハの裏面に外部接続部材8(たとえば半田ボール)が形成される。その後、半導体ウエハがダイシングされ、複数個の半導体装置1に分割される。
この実施形態では、半導体基板3に代えて用いられる半導体基板80がSOI基板で構成されている。SOI基板80は、シリコン基板81の表面に絶縁層82が形成され、その絶縁層82の上にエピタキシャル成長させた半導体層83を有する基板である。その半導体層83の表層部の素子形成領域84にトランジスタその他の素子が形成されている。貫通ビア9は、SOI基板80のシリコン基板81、絶縁層82および半導体層83を貫通して形成されている。
図8は、この発明の第3の実施形態に係る半導体装置1Bの構成を説明するための図解的な断面図であり、図5Aと同様な切断面が示されている。図8において、図1〜図6に示された各部の対応部分に同一参照符号を付す。
図9〜図13は、第1の実施形態の半導体装置1において、半導体チップ2の回路部品接続面に様々な種類の回路部品を実装した構成例を示す。これらの図面において、図1〜図6に示された各部の対応部分に同一参照符号を付す。
図10の半導体装置1は、半導体チップ2の回路部品接続面10に実装された一対のキャパシタチップC1,C2と、水晶振動子チップCRとを有している。
図11の半導体装置1は、半導体チップ2の回路部品接続面10に実装された一対のキャパシタチップC1,C2と、MEMSチップMとを有している。MEMSチップMは、加速度センサ、角速度センサ、圧力センサ等のセンサ類であってもよいし、インクジェットヘッド、デジタル・マイクロミラー・デバイス等のアクチュエータ類であってもよい。
図13の半導体装置1は、半導体チップ2の回路部品接続面10に実装された一対のキャパシタチップC1,C2と、センサチップSとを含む。センサチップSは、たとえば、温度センサ、圧力センサ等であってもよい。
以上、この発明の一実施形態について説明してきたが、この発明は、さらに他の形態で実施することもできる。たとえば、キャパシタチップ、インダクタチップ、ICチップ、抵抗器チップ、ダイオードチップ、発光ダイオード素子、センサ素子、MEMS素子等の回路部品は、ただ一つが回路部品接続面に実装されてもよいし、同種の複数個が回路部品接続面に実装されてもよい。また、任意の組み合わせで複数種類の回路部品が回路部品接続面に実装されてもよい。回路部品接続面に実装される回路部品の数は前述の実施形態の例に限られず、実装可能な任意の数の回路部品が回路部品接続面に実装されてもよい。
また、前述の実施形態では、半導体基板の材料がシリコンである例を示したが、半導体基板を構成する半導体材料には、シリコン以外にも、SiC、GaNに代表される化合物半導体を適用してもよい。
この明細書および添付図面の記載から導き出される特徴の例を以下に記す。
1.半導体基板と、前記半導体基板の表面の素子形成領域に作り込まれた素子とを有する半導体チップと、前記半導体チップの前記半導体基板の表面と同じ側の表面である回路部品接続面に実装された回路部品と、前記半導体基板の前記裏面側に設けられた外部接続部材とを含む、半導体装置。
この構成によれば、半導体基板の表面の素子形成領域に素子が形成されており、当該表面と同側の半導体チップの表面が回路部品接続面とされ、この回路部品接続面に回路部品が配置されている。それにより、半導体基板に形成された素子と回路部品との間の距離を短くすることができるので、それに応じて、それらの間の電気経路の抵抗を低くすることができる。その結果、電気経路における損失を低減できるので、高周波化を図ることができ、かつ耐ノイズ性を向上することができる。
2.前記半導体チップが、前記半導体基板の前記素子形成領域を回避して当該半導体基板の表面と裏面との間を貫通し、前記表面および裏面の間に導電路を形成する貫通ビアをさらに有する。
この構成によれば、半導体装置と外部との接続は、半導体基板の裏面側に設けられた外部接続部材によって達成される。この外部接続部材は、半導体基板の表面および裏面の間の導電路を形成する貫通ビアを介して、半導体基板に形成された素子および回路部品を含む電気回路に接続することができる。貫通ビアは素子形成領域を回避して配置されるが、回路部品は貫通ビアの一部または全部と重なり合うように配置することもできる。
3.第1半導体基板と、前記第1半導体基板の表面の素子形成領域に作り込まれた素子と、前記第1半導体基板の前記素子形成領域を回避して当該第1半導体基板の表面と裏面との間を貫通し、前記表面および裏面の間に導電路を形成する第1貫通ビアと、を有する第1半導体チップと、第2半導体基板と、前記第2半導体基板の表面の素子形成領域に作り込まれた素子と、前記第2半導体基板の前記素子形成領域を回避して当該第2半導体基板の表面と裏面との間を貫通し、前記表面および裏面の間に導電路を形成する第2貫通ビアと、を有する第2半導体チップと、前記第1半導体チップの前記第1半導体基板の表面と同じ側の表面である回路部品接続面に実装された回路部品と、前記第1半導体基板の裏面と前記第2半導体基板の表面との間で前記第1貫通ビアと前記第2貫通ビアとを電気的に接続する電気的接続手段と、前記第2半導体基板の前記裏面側に設けられた外部接続部材とを含む、半導体装置。
4.前記電気的接続手段は、第1貫通ビアおよび第2貫通ビアの間を接合する導電性接合材を含む。
5.前記電気的接続手段は、第2半導体チップの表面に形成され、第2貫通ビアに接続された表面電極を含む。
6.前記電気的接続手段は、第1半導体チップおよび第2半導体チップの間に介装された第3半導体チップを含む。
C2 キャパシタチップ(回路部品)
L インダクタチップ(回路部品)
R 抵抗器チップ
CR 水晶振動子チップ
M MEMSチップ
IC LSIチップ
S センサチップ
1 半導体装置
1A 半導体装置
1B 半導体装置
2 半導体チップ
3 半導体基板
3a 表面
3b 裏面
4 素子形成領域
6 多層配線層
6W 配線層
7 貫通ビア領域
8 外部接続部材
P1〜P5 外部接続端子
D1〜D4 ダミー端子
9 貫通ビア
10 回路部品接続面
11〜16 電極
19 空間
20 絶縁膜
21〜30 表面電極
31〜38 導電性接合材
41〜47 パッド
50 表面配線層
51,52 素子−貫通ビア間表面配線層
53 インダクタ−素子間表面配線層
54 キャパシタ−素子間表面配線層
55 インダクタ−キャパシタ間表面配線層
56 キャパシタ−キャパシタ間表面配線層
60 貫通孔
61 導体
62 側壁
63 絶縁膜
70 集積回路
71〜75 電気経路
80 半導体基板(SOI基板)
81 シリコン基板
82 絶縁層
83 半導体層
84 素子形成領域
85 貫通ビア領域
91〜93 半導体チップ
101〜104 素子
Claims (22)
- 入力電圧から所望の出力電圧を生成する電圧生成装置であって、
半導体基板と、前記半導体基板の表面の素子形成領域に作り込まれた素子とを有する半導体チップと、
前記半導体チップの前記半導体基板の表面と同じ側の表面である回路部品接続面に実装された回路部品と、
前記半導体基板の前記裏面側に設けられた外部接続部材とを含み、
前記外部接続部材が、入力電圧が入力される入力電圧端子と、グランド電位に接続されるグランド端子と、出力電圧が出力される出力端子とを含み、
前記素子が、前記入力電圧端子と前記グランド端子との間に直列に接続された第1トランジスタおよび第2トランジスタを含み、
前記半導体チップが、さらに、前記第1トランジスタおよび前記第2トランジスタを制御する制御回路を有し、
前記回路部品が、前記第1トランジスタおよび前記第2トランジスタの接続点と前記出力端子との間に接続されるインダクタチップを含み、前記第1トランジスタまたは前記第2トランジスタの直上に前記インダクタチップが配置されている、電圧生成装置。 - 前記半導体チップが、前記半導体基板の前記素子形成領域を回避して当該半導体基板の表面と裏面との間を貫通し、前記表面および裏面の間に導電路を形成する貫通ビアをさらに有する、請求項1に記載の電圧生成装置。
- 前記半導体チップの回路部品接続面に形成され、前記素子形成領域に形成された回路を前記貫通ビアに接続する第1表面配線層をさらに含む、請求項2に記載の電圧生成装置。
- 前記半導体チップの回路部品接続面に形成され、前記回路部品の電極を前記貫通ビアに接続する第3表面配線層をさらに含む、請求項2または3に記載の電圧生成装置。
- 前記回路部品の電極が前記貫通ビアの直上に配置されている、請求項2〜4のいずれか一項に記載の電圧生成装置。
- 前記外部接続部材が前記貫通ビアの直下に配置されている、請求項2〜5のいずれか一項に記載の電圧生成装置。
- 前記貫通ビアが、前記素子形成領域よりも前記半導体基板の周縁に近い領域に配置されている、請求項2〜6のいずれか一項に記載の電圧生成装置。
- 前記貫通ビアが、前記素子形成領域に取り囲まれている、請求項2〜7のいずれか一項に記載の電圧生成装置。
- 前記貫通ビアがTSV(貫通シリコンビア)である、請求項2〜8のいずれか一項に記載の電圧生成装置。
- 前記半導体チップの回路部品接続面に形成され、前記素子形成領域に形成された回路を前記回路部品の電極に接続する第2表面配線層をさらに含む、請求項1〜9のいずれか一項に記載の電圧生成装置。
- 前記半導体チップの回路部品接続面に形成され、前記回路部品の電極を前記半導体チップの回路部品接続面に実装された他の回路部品に接続する第4表面配線層をさらに含む、請求項1〜10のいずれか一項に記載の電圧生成装置。
- 前記半導体チップの回路部品接続面を覆う絶縁層をさらに含む、請求項1〜11のいずれか一項に記載の電圧生成装置。
- 前記絶縁層の表面と前記回路部品との間に空間が形成されている、請求項12に記載の電圧生成装置。
- 前記絶縁層が、ポリイミド膜、酸化膜またはソルダーレジスト膜である、請求項12または13に記載の電圧生成装置。
- 前記絶縁層の厚さが10μm以上である、請求項12〜14のいずれか一項に記載の電圧生成装置。
- 平面視において前記素子形成領域と少なくとも一部が重なり合うように前記回路部品が前記回路部品接続面に実装されている、請求項1〜15のいずれか一項に記載の電圧生成装置。
- 平面視において、前記回路部品の電極が、前記素子形成領域を回避して配置されている、請求項1〜16のいずれか一項に記載の電圧生成装置。
- 前記回路部品が、前記入力電圧端子と前記グランド端子との間に接続された第1キャパシタチップを含む、請求項1〜17のいずれか一項に記載の電圧生成装置。
- 前記回路部品が、前記出力端子と前記グランド端子との間に接続された第2キャパシタチップを含む、請求項1〜18のいずれか一項に記載の電圧生成装置。
- 前記回路部品が、キャパシタチップ、ICチップ、抵抗器チップ、ダイオードチップ、発光ダイオード素子、センサ素子、またはMEMS素子を含む、請求項1〜17のいずれか一項に記載の電圧生成装置。
- 前記回路部品が、受動部品を含む、請求項1〜17のいずれか一項に記載の電圧生成装置。
- 前記半導体基板がSOI基板である、請求項1〜21のいずれか一項に記載の電圧生成装置。
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