JP2007005828A - 半導体基板上に形成される高精度高周波数キャパシタ - Google Patents
半導体基板上に形成される高精度高周波数キャパシタ Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 107
- 239000000758 substrate Substances 0.000 title claims abstract description 83
- 239000004065 semiconductor Substances 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 21
- 238000002161 passivation Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 13
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000000059 patterning Methods 0.000 claims 1
- 239000010949 copper Substances 0.000 description 24
- 229920002120 photoresistant polymer Polymers 0.000 description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 229910052802 copper Inorganic materials 0.000 description 12
- 229910000679 solder Inorganic materials 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 244000126211 Hericium coralloides Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Abstract
【解決手段】高精度高周波数キャパシタは半導体基板102の表側に形成された誘電層104を有し、第一の電極106が誘電層上に形成される。半導体基板は高度にドープされ、それゆえ抵抗率が低い。第二の電極108は第一の電極106より絶縁され、また表側表面上に形成される。一つの実施例では、第二の電極108は金属を満たしたビア116によって裏面の導電層120と電気的に接続される。他の実施例ではビアは省略され、第二の電極は基板と電気的に接続されているか、誘電層上に形成されるかのどちらかであり、一対の連続して接続されたキャパシタを作り出す。
【選択図】 図1
Description
本発明の一側面によると、保護ダイオードは自身の基板内で形成されてもよく、図19のESD保護キャパシタ構造に示されている。N+領域902、P領域904、及びN+領域906は電極106の下部の基板102内に形成される。領域はダイオードの1つを表すN+領域902及びP領域904の間の第一PNジャンクション、及びその他のダイオードを表すP領域904及びN+領域906間の第二PNジャンクションが存在するように形成される。領域902、904、及び906のドーピング濃度は、所望の電圧で逆方向でPNジャンクションがブレークダウンするべくセットされる。ブレークダウン電圧は、PNジャンクションのより軽度にドープされた側のドーピング濃度、及び本技術分野に於いて良く知られたその他の要素に依存している。例えばSze, Physics of Semiconductor Devices, 2nd Ed., John Wiley & Sons (1981), pp. 99-108を参照して頂きたい。またここで言及したことにより本出願の一部とされたい。
P領域904の幅(W1): 5μm
N+領域900の幅(W2): 3μm
構造体の長さ: 100μm
となる。
104 誘電層
106 主電極
108 第二電極
110 パシベーション層
112 はんだボール
114 はんだボール
116 ビア
118 導電性物質
120 導電層
202 バリア層
204 フォトレジスト層
206 銅層
208 Ta/Cu層
210 銅層
212 フォトレジスト層
214 開口
216 ビア
218 Ta/Cu層
222 銅層
224 パシベーション層
226 はんだバンプ
228 はんだバンプ
230 パシベーション層
302 誘電層
304 第一電極
306 第二電極
308 パシベーション層
310 はんだボール
312 はんだボール
402 誘電層
404 導電性物質
406 トレンチ
502 電極
504 電極
506 誘電層
602 第一電極
602a、602b、602c フィンガー
604 第二電極
604a、604b、604c、604d フィンガー
606 活動化領域
616 誘電層
618 誘電層
902 N+領域
904 P領域
906 N+領域
Claims (20)
- 高周波用の高精度キャパシタであって、
第一及び第二の主面を有する高度にドープされた半導体基板と、
前記基板の前記第一の主面上に形成された第一の誘電層部分と、
前記第一の誘電層部分上に形成され前記基板より電気的に絶縁されている第一の電極層と、
前記基板の前記第一主面上に形成された第二の誘電層部分と、
前記第二の誘電層部分上に形成され、前記基板及び前記第一の電極層と電気的に絶縁された第二の電極層とを有するキャパシタ。 - 前記半導体基板のドーピング濃度が1×1019cm−3よりも大きいことを特徴とする請求項1に記載のキャパシタ。
- 前記誘電層部分が酸化物を含むことを特徴とする請求項1に記載のキャパシタ。
- 前記誘電層部分の前記厚さが0.005ミクロンより大きいか若しくは等しいことを特徴とする請求項1に記載のキャパシタ。
- 更に、
前記第一及び第二の電極に重合したパシベーション層と、
前記第一の電極上の前記パシベーション層に形成された第一の開口と、
前記第二の電極上の前記パシベーション層に形成された第二の開口とを有することを特徴とする請求項1に記載のキャパシタ。 - 前記主電極層に電気的に接続された前記第一の開口中の第一金属ボールと、
前記第二の電極層に電気的に接続されている前記第二の開口中の第二の金属ボールとを含むことを特徴とする請求項5に記載のキャパシタ。 - 前記第一の誘電層部分の下部の基板中にトレンチを含み、
前記第一の誘電層部分が前記トレンチの前記ウォール(wall)に沿って延在し、
前記トレンチが導電性物質を含み、前記導電性物質は前記第一の電極と電気的に接続されていることを特徴とする請求項1に記載のキャパシタ。 - 前記誘電層部分が酸化物を有することを特徴とする請求項7に記載のキャパシタ。
- 前記導電物質がポリシリコンを含むことを特徴とする請求項7に記載のキャパシタ。
- 更に、
前記第一及び第二の電極に重合したパシベーション層と、
前記第一の電極上の前記パシベーション層に形成された第一の開口と、
前記第二の電極上の前記パシベーション層に形成された第二の開口とを有することを特徴とする請求項7に記載のキャパシタ。 - 前記主電極層に電気的に接続された前記第一の開口中の第一金属ボールと、
前記第二の電極層に電気的に接続されている前記第二の開口中の第二の金属ボールとを含むことを特徴とする請求項10に記載のキャパシタ。 - 前記第一の電極層が第一の複数のフィンガーを有し、前記第二の電極層が第二の複数の前記フィンガーを有し、前記第一及び第二の複数のフィンガーが櫛歯状に組み合わされていることを特徴とする請求項1に記載のキャパシタ。
- 前記第一の複数のフィンガーが前記第一の電極層部分の第一のパーム部分より延在し、前記第一の誘電層部分が前記第一のパーム部分の下部と比較して前記第一の複数のフィンガーの下部でより薄くさせられることを特徴とする請求項12に記載のキャパシタ。
- 前記第二の複数のフィンガーが前記第二の電極層部分の第二のパーム部分より延在し、前記第二の誘電層部分が前記第二のパーム部分の下部と比較して前記第二の複数のフィンガーの下部でより薄くさせられることを特徴とする請求項13に記載のキャパシタ。
- 高周波用の高精度キャパシタであって、
第一及び第二の主面を有する高度にドープされた半導体基板と、
前記基板の前記第一の主面上に形成された誘電層と、
前記誘電層上に形成され、前記基板と電気的に絶縁されている第一の電極層と、
前記基板の前記第一主面上に形成され、前記基板と電気的に接続されている第二の電極層とを有するキャパシタ。 - 更に、
前記第一及び第二の電極に重合したパシベーション層と、
前記第一の電極上の前記パシベーション層に形成された第一の開口と、
前記第二の電極上の前記パシベーション層に形成された第二の開口とを有することを特徴とする請求項15に記載のキャパシタ。 - 前記主電極層に電気的に接続された前記第一の開口中の第一金属ボールと、
前記第二の電極層に電気的に接続されている前記第二の開口中の第二の金属ボールとを含むことを特徴とする請求項16に記載のキャパシタ。 - 前記第一の電極層が第一の複数のフィンガーを有し、前記第二の電極層が第二の複数の前記フィンガーを有し、前記第一及び第二の複数のフィンガーが櫛歯状に組み合わされていることを特徴とする請求項15に記載のキャパシタ。
- 前記第一の複数のフィンガーが前記第一の電極層部分の第一のパーム部分より延在し、前記第一の誘電層部分が前記第一のパーム部分の下部と比較して前記第一の複数のフィンガーの下部でより薄くさせられることを特徴とする請求項18に記載のキャパシタ。
- 第一及び第二の主面を有する半導体基板中のキャパシタを製造するための方法であって、
前記基板の前記第一の主面上に誘電層を形成する過程と、
前記基板上の前記第二の主面上に導電層を形成する過程と、
前記第一の主面より前記導電層まで前記基板を通じてビアを切り取る過程と、
前記ビア中に導電性物質を被膜させる過程と、
前記基板の前記第一表面上に電極層を形成する過程と、
及び第一及び第二の部分を形成するべく前記電極層をパターン化し、前記第一の部分が前記誘電層によって前記基板より絶縁され、前記第二の部分が前記ビア中の前記導電性物質で電気的に接続されているようなキャパシタの製造方法。
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EP (3) | EP1895568B1 (ja) |
JP (2) | JP3943879B2 (ja) |
CN (1) | CN1182566C (ja) |
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US20030030125A1 (en) | 2003-02-13 |
EP1895569B1 (en) | 2013-06-12 |
EP1895568B1 (en) | 2014-07-16 |
TW535251B (en) | 2003-06-01 |
EP1895568A1 (en) | 2008-03-05 |
US6621143B2 (en) | 2003-09-16 |
JP2002176106A (ja) | 2002-06-21 |
EP1189263B1 (en) | 2010-11-24 |
JP3943879B2 (ja) | 2007-07-11 |
JP5016284B2 (ja) | 2012-09-05 |
US20030057517A1 (en) | 2003-03-27 |
US6538300B1 (en) | 2003-03-25 |
CN1346138A (zh) | 2002-04-24 |
US6621142B2 (en) | 2003-09-16 |
EP1895569A1 (en) | 2008-03-05 |
EP1189263A2 (en) | 2002-03-20 |
EP1189263A3 (en) | 2005-04-27 |
CN1182566C (zh) | 2004-12-29 |
DE60143510D1 (de) | 2011-01-05 |
SG103315A1 (en) | 2004-04-29 |
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