JP2016090578A - エッジ欠陥検査 - Google Patents
エッジ欠陥検査 Download PDFInfo
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- H01L22/34—Circuits for electrically characterising or monitoring manufacturing processes, e. g. whole test die, wafers filled with test structures, on-board-devices incorporated on each die, process control monitors or pad structures thereof, devices in scribe line
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
【解決手段】 パワー半導体素子(1)が提示される。パワー半導体素子(1)は半導体本体(11)を備え、半導体本体(11)はアクティブ半導体領域(111)とアクティブ半導体領域(111)を取り囲む周辺半導体領域(112)とを含み、アクティブ半導体領域(111)はアクティブ表面エリア(121)を有し、周辺半導体領域(112)は周辺表面エリア(122)を有する。パワー半導体素子(1)は、周辺半導体領域(112)を非接触試験する試験構造(13)をさらに備え、試験構造(13)は、周辺表面エリア(122)に実装される導電路(131)を含んでいて、遠隔生成された試験無線周波電磁場(5)からエネルギーを抽出する。
【選択図】 図1A
Description
11 半導体本体
13 試験構造
14 第一の負荷接触構造
31 発生器
32 試験信検出器
111 アクティブ半導体領域
112 周辺半導体領域
121 アクティブ表面エリア
122 周辺表面エリア
131 導電路
131−1 導電路の第一の端
131−2 導電路の第二の端
132 絶縁膜
133 コンデンサ
133−1 第一の電極
133−2 第二の電極
133−3 ウェル
133−31 ウェルの第一の区域
133−32 ウェルの第二の区域
134 pn接合
135 pn接合
141 前面金属膜
Claims (20)
- パワー半導体素子(1)であって、
半導体本体(11)を含み、前記半導体本体(11)はアクティブ半導体領域(111)と、前記アクティブ半導体領域(111)を取り囲む周辺半導体領域(112)とを有し、前記アクティブ半導体領域(111)はアクティブ表面エリア(121)を有し、前記周辺半導体領域(112)は周辺表面エリア(122)を有し、
前記周辺半導体領域(112)を非接触試験する試験構造(13)をさらに含み、前記試験構造(13)は、前記周辺表面エリア(122)に実装される導電路(131)を有していて、遠隔生成された試験無線周波電磁場(5)からエネルギーを抽出する、パワー半導体素子(1)。 - 前記試験構造(13)は、抽出されたエネルギーに応じて試験信号を生成し、生成された試験信号は、遠隔にある試験信号検出器(32)によって検出される、請求項1に記載のパワー半導体素子(1)。
- パワー半導体素子(1)は絶縁膜(132)を有し、前記絶縁膜(132)は、少なくとも一部が前記周辺半導体領域(112)内にあって、前記導電路(131)を前記周辺半導体領域(112)から電気的に絶縁する、、請求項1または2に記載のパワー半導体素子(1)。
- 前記導電路(131)は、前記アクティブ表面エリア(121)を完全に取り囲む、請求項1〜3の何れか1項に記載のパワー半導体素子(1)。
- 前記導電路(131)は、前記周辺半導体領域(112)と接触している、請求項1〜4の何れか1項に記載のパワー半導体素子(1)。
- 前記試験構造(13)はコンデンサ(133)を含み、前記コンデンサ(133)はキャパシタンスを有して、前記導電路(131)に電気的に連結され、
導電路(131)はインダクタンスを有し、
前記試験構造(13)は、前記導電路(131)のインダクタンスと前記コンデンサ(133)のキャパシタンスにより画定される少なくとも1つの共振周波数を有する、
請求項1〜5の何れか1項に記載のパワー半導体素子(1)。 - 前記コンデンサは第一の電極(133−1)および第二の電極(133−2)を含み、前記第一の電極(133−1)および前記第二の電極(133−2)は、前記周辺表面エリア(122)に実装され、前記第一の電極(133−1)と前記第二の電極(133−2)との間の電界は、前記周辺半導体領域(112)の中へと及ぶ、請求項6に記載のパワー半導体素子(1)。
- 前記導電路(131)、前記第一の電極(133−1)、および前記第二の電極(133−2)は、前記周辺表面エリア(122)に実装されるモノリシックコンポーネントを形成する、請求項7に記載のパワー半導体素子(1)。
- 前記周辺半導体領域(112)はウェル(133−3)を含み、前記ウェル(133−3)は第一の導電型の電荷担体を含み、前記第一の電極(133−1)と前記第二の電極(133−2)との間の電界は、前記ウェル(133−3)の中へと及ぶ、請求項7または8に記載のパワー半導体素子(1)。
- 前記ウェル(133−3)は、第一の区域(133−31)及び第二の区域(133−32)を含み、前記第一の区域(133−31)及び前記第二の区域(133−32)はどちらも、第二の導電型の電荷担体を含み、前記第一の区域(133−31)は前記第一の電極(133−1)と接触し、前記第二の区域(133−32)は前記第二の電極(133−2)と接触する、請求項9に記載のパワー半導体素子(1)。
- 前記周辺半導体領域(112)は少なくとも1つのpn接合(134、135)を含み、前記少なくとも1つのpn接合(134、135)は、前記試験構造(13)に電気的に連結される、請求項1〜10の何れか1項に記載のパワー半導体素子(1)。
- 前記試験構造(13)はダイオードを含み、前記ダイオードは前記導電路(131)に電気的に連結され、前記抽出されたエネルギーを検出可能な光信号に変換するように構成される、請求項1〜11の何れか1項に記載のパワー半導体素子(1)。
- 前記導電路(131)は、相互に離間される第一の端(131−1)及び第二の端(131−2)を呈し、前記第一の端(131−1)及び前記第二の端(131−2)の両方が前記パワー半導体素子(1)のバルク領域に電気的に連結される、請求項1〜12の何れか1項に記載のパワー半導体素子(1)。
- 前記導電路(131)は、抽出されたエネルギーを検出可能な熱信号に変換するように構成される、請求項1〜13の何れか1項に記載のパワー半導体素子(1)。
- 第一の負荷接触構造(14)をさらに含み、前記第一の負荷接触構造(14)は前記アクティブ表面エリア(121)に実装され、前記試験構造(13)から電気的に絶縁され、前記第一の負荷接触構造(14)は、負荷電流を前記アクティブ半導体領域(111)に供給するように構成される、請求項1〜14の何れか1項に記載のパワー半導体素子(1)。
- 前記パワー半導体素子(1)は、動作周波数範囲内で動作し、前記試験無線周波電磁場(5)は、前記動作周波数範囲の周波数の少なくとも2倍高い周波数を有する、請求項1〜15の何れか1項に記載のパワー半導体素子(1)。
- 前記半導体本体(11)はシリコンカーバイドで製作される、請求項1〜16の何れか1項に記載のパワー半導体素子(1)。
- パワー半導体素子(1)の製造方法(2)において、
半導体本体(11)を製作するステップ(21)であって、前記半導体本体(11)はアクティブ半導体領域(111)と、前記アクティブ半導体領域(111)を取り囲む周辺半導体領域(112)とを含み、前記アクティブ半導体領域(111)はアクティブ表面エリア(121)を有し、前記周辺半導体領域(112)は周辺表面エリア(122)を有するステップ(21)と、
前記アクティブ表面エリア(121)上に、前面金属膜材料を含む前面金属膜(141)を生成するステップ(22)と、
前記周辺表面エリア(122)上に、前記周辺半導体領域(112)を非接触試験する試験構造(13)を製作するステップ(23)であって、前記試験構造(13)が、遠隔生成された試験無線周波電磁場(5)からエネルギーを抽出するように構成され、前記試験構造(13)を製作するステップ(23)は、前記周辺表面エリア(122)上に導電路(131)を生成するステップを含み、前記導電路(131)は前記前面金属膜(141)と同じ前面金属膜材料を含むステップ(23)と、
を含む製造方法(2)。 - 前記前面金属膜(141)と前記導電路(131)は同時に生成される、請求項18に記載の方法(2)。
- 前記前面金属膜(141)と前記導電路(131)はどちらも同じ金属化装置で生成される、請求項18または19に記載の方法(2)。
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