JP2012238715A - 半導体装置及び半導体素子 - Google Patents
半導体装置及び半導体素子 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 155
- 230000008054 signal transmission Effects 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000969 carrier Substances 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
【解決手段】本発明に係る半導体装置は、第1ゲートを有し該第1ゲートからの信号でオンオフが制御される第1素子部と、第2ゲートを有し該第2ゲートからの信号でオンオフが制御される第2素子部と、を有する半導体素子と、該第1ゲート及び該第2ゲートに接続され、該半導体素子をターンオンするときは該第1素子部と該第2素子部を同時にターンオンし、該半導体素子をターンオフするときは該第2素子部を該第1素子部よりも遅延してターンオフするように該第1ゲートと該第2ゲートに信号を伝送する信号伝送手段と、を備えたことを特徴とする。
【選択図】図1
Description
図1は、本発明の実施の形態1に係る半導体装置を示す回路図である。本発明の実施の形態1に係る半導体装置は、第1素子部10と第2素子部12を備えている。第1素子部10と第2素子部12で1つの半導体素子を形成している。第1素子部10のゲート(第1ゲートと称する)と第2素子部12のゲート(第2ゲートと称する)は、信号伝送手段14に接続されている。信号伝送手段14は、第1ゲートと第2ゲートに個別に信号を供給する部分である。
図9は、本発明の実施の形態2に係る半導体装置の半導体素子を示す図である。半導体素子70は第1素子部72と第2素子部74を有している。第2素子部74は第1素子部72よりも大面積となるように形成されている。半導体装置のうち図9に示さない部分、及び半導体装置の動作については実施の形態1と同様である。
図10は、本発明の実施の形態3に係る半導体装置の半導体素子を示す図である。半導体素子80は第1素子部82と第2素子部84を有している。第2素子部84は第1素子部82を囲むように形成されている。第1素子部82の面積と第2素子部84の面積は等しい。半導体装置のうち図10に示さない部分、及び半導体装置の動作については実施の形態1と同様である。
本発明の実施の形態4に係る半導体素子は第1素子部と第2素子部でスイッチング速度を変化させたことを特徴とする。図14は、本発明の実施の形態4に係る半導体素子の断面図である。半導体素子は、コレクタ層40a及び40bからドリフト層30へキャリアを注入する伝導度変調型の半導体素子である。図14に示す断面図と図3に示す断面図との相違点はコレクタ層である。なお、半導体装置のうち図14に示さない部分、及び半導体装置の動作については実施の形態1と同様である。
本発明の実施の形態5に係る半導体素子は第1素子部と第2素子部の閾値電圧が異なることを特徴とする。図18は、本発明の実施の形態5に係る半導体素子の断面図である。ゲートG1及びG2には同一の信号が伝送される。
本発明の実施の形態6に係る半導体素子は、第1素子部と第2素子部のCR時定数が異なることを特徴とする。図20は、本発明の実施の形態6に係る半導体素子の断面図である。第1ゲート(G1)及び第2ゲート(G2)には同一の信号が伝送される。
Claims (13)
- 第1ゲートを有し前記第1ゲートからの信号でオンオフが制御される第1素子部と、第2ゲートを有し前記第2ゲートからの信号でオンオフが制御される第2素子部と、を有する半導体素子と、
前記第1ゲート及び前記第2ゲートに接続され、前記半導体素子をターンオンするときは前記第1素子部と前記第2素子部を同時にターンオンし、前記半導体素子をターンオフするときは前記第2素子部を前記第1素子部よりも遅延してターンオフするように前記第1ゲートと前記第2ゲートに信号を伝送する信号伝送手段と、
を備えたことを特徴とする半導体装置。 - 前記第2素子部は前記第1素子部よりも大面積であることを特徴とする請求項1に記載の半導体装置。
- 前記第2素子部は前記第1素子部を囲むように形成されたことを特徴とする請求項1又は2に記載の半導体装置。
- 前記第2素子部は前記第1素子部よりも高速でスイッチングするように構成されたことを特徴とする請求項1乃至3のいずれか1項に記載の半導体装置。
- 前記半導体素子はコレクタ層からドリフト層にキャリアを注入する伝導度変調型の半導体素子であり、
前記第1素子部に形成された第1コレクタ層と、
前記第2素子部に形成された第2コレクタ層と、を備え、
前記第2コレクタ層の不純物濃度は前記第1コレクタ層の不純物濃度より低いことを特徴とする請求項4に記載の半導体装置。 - 前記第2素子部には、前記第1素子部よりも高密度でキャリアのライフタイムキラーが形成されたことを特徴とする請求項4に記載の半導体装置。
- 前記半導体素子に形成されたセンスパッドを備えたことを特徴とする請求項1乃至6のいずれか1項に記載の半導体装置。
- それぞれ個別にゲートが形成された複数の素子部を有する半導体素子と、
前記半導体素子のすべてのゲートに接続され、前記半導体素子をターンオンするときは前記複数の素子部のすべてを同時にターンオンし、前記半導体素子をターンオフするときは前記複数の素子部を順次ターンオフする信号伝送手段と、
を備えたことを特徴とする半導体装置。 - 前記半導体素子はワイドバンドギャップ半導体によって形成されたことを特徴とする請求項1乃至8のいずれか1項に記載の半導体装置。
- 前記ワイドバンドギャップ半導体は、炭化珪素、窒化ガリウム系材料又はダイアモンドであることを特徴とする請求項9に記載の半導体装置。
- 第1ゲートからの信号でオンオフが制御される第1素子部と、
第2ゲートからの信号でオンオフが制御され、前記第1素子部に対して遅延して動作するように構成された第2素子部と、
を備えたことを特徴とする半導体素子。 - 前記半導体素子はワイドバンドギャップ半導体によって形成されたことを特徴とする請求項11に記載の半導体素子。
- 前記ワイドバンドギャップ半導体は、炭化珪素、窒化ガリウム系材料又はダイアモンドであることを特徴とする請求項12に記載の半導体素子。
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US20120286288A1 (en) | 2012-11-15 |
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KR20140079345A (ko) | 2014-06-26 |
CN102779820A (zh) | 2012-11-14 |
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US8994147B2 (en) | 2015-03-31 |
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