JP7015129B2 - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 138
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 137
- 229910052710 silicon Inorganic materials 0.000 claims description 137
- 239000010703 silicon Substances 0.000 claims description 137
- 239000000758 substrate Substances 0.000 claims description 55
- 150000001875 compounds Chemical class 0.000 claims description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 35
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 35
- 150000004767 nitrides Chemical group 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 12
- 238000004128 high performance liquid chromatography Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 229910002601 GaN Inorganic materials 0.000 description 4
- 230000012010 growth Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- NWAIGJYBQQYSPW-UHFFFAOYSA-N azanylidyneindigane Chemical compound [In]#N NWAIGJYBQQYSPW-UHFFFAOYSA-N 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Description
上記態様の半導体装置において、ワイドバンドギャップ化合物半導体層の上に設けられた第1のソース電極と、ワイドバンドギャップ化合物半導体層の上に設けられた第1のドレイン電極と、第1のソース電極と第1のドレイン電極の間に設けられた第1のゲート電極と、第2のシリコン層の上に設けられたn型のソース領域と、第2のシリコン層の上に設けられたn型のドレイン領域と、ソース領域の上に設けられ、第1のゲート電極に電気的に接続された第2のソース電極と、ドレイン領域の上に設けられ、第1のソース電極に電気的に接続された第2のドレイン電極と、第2のソース電極と第2のドレイン電極の間に設けられたゲート絶縁膜と、ゲート絶縁膜の上に設けられた第2のゲート電極と、をさらに備え、第2のシリコン層はp型であることが好ましい。
上記態様の半導体装置の製造方法において、ワイドバンドギャップ化合物半導体層の上に第1のソース電極を形成し、ワイドバンドギャップ化合物半導体層の上に第1のドレイン電極を形成し、第1のソース電極と第1のドレイン電極の間に第1のゲート電極を形成し、第2のシリコン層の上にn型のソース領域を形成し、第2のシリコン層の上にn型のドレイン領域を形成し、ソース領域の上に第2のソース電極を形成し、ドレイン領域の上に第2のドレイン電極を形成し、第2のソース電極と第2のドレイン電極の間にゲート絶縁膜を形成し、ゲート絶縁膜の上に第2のゲート電極を形成し、第1のゲート電極と第2のソース電極を電気的に接続し、第1のソース電極と第2のドレイン電極を電気的に接続し、第2のシリコン層はp型であることが好ましい。
本実施形態の半導体装置は、第1の面方位の第1の面を有するシリコン基板と、シリコン基板の第1の領域上に設けられた酸化シリコン層と、酸化シリコン層上に設けられ第1の面方位と異なる第2の面方位の第2の面を有する第1のシリコン層と、六方晶の結晶構造を有するワイドバンドギャップ化合物半導体層と、を備える。
本実施形態の半導体装置は、ワイドバンドギャップ化合物半導体層はシリコン基板の第2の領域上に設けられ、第1の面方位は{111}面であり、第2の面方位は{100}面である点で、第1の実施形態と異なっている。なお、各シリコン基板の面方位は、10度以下のオフ角で傾斜していてもよい。ここで、第1の実施形態と重複する内容については、記載を省略する。
本実施形態の半導体装置300は、ワイドバンドギャップ化合物半導体層10として炭化珪素(SiC)を用いる点で、第1及び第2の実施形態と異なっている。ここで、第1の実施形態と重複する内容については、記載を省略する。
2a 第1の面
2b 第1の領域
2c 第2の領域
4 酸化シリコン層
6 第1のシリコン層
6a 第2の面
10 ワイドバンドギャップ化合物半導体層
40 第2のシリコン層
100 半導体装置
200 半導体装置
300 半導体装置
Claims (7)
- 面方位が{100}である第1の面を有するシリコン基板と、
前記シリコン基板の第1の領域上に設けられた酸化シリコン層と、
前記酸化シリコン層上に設けられ面方位が{111}である第2の面を有し、アンドープである第1のシリコン層と、
六方晶の結晶構造を有し、前記第1のシリコン層上に設けられたワイドバンドギャップ化合物半導体層と、
前記シリコン基板の前記第1の領域と異なる第2の領域上に設けられた第2のシリコン層と、
を備える半導体装置。 - 前記ワイドバンドギャップ化合物半導体層の上に設けられた第1のソース電極と、
前記ワイドバンドギャップ化合物半導体層の上に設けられた第1のドレイン電極と、
前記第1のソース電極と前記第1のドレイン電極の間に設けられた第1のゲート電極と、
前記第2のシリコン層の上に設けられたn型のソース領域と、
前記第2のシリコン層の上に設けられたn型のドレイン領域と、
前記ソース領域の上に設けられ、前記第1のゲート電極に電気的に接続された第2のソース電極と、
前記ドレイン領域の上に設けられ、前記第1のソース電極に電気的に接続された第2のドレイン電極と、
前記第2のソース電極と前記第2のドレイン電極の間に設けられたゲート絶縁膜と、
前記ゲート絶縁膜の上に設けられた第2のゲート電極と、
をさらに備え、
前記第2のシリコン層はp型である、
請求項1記載の半導体装置。 - 面方位が{111}である第1の面を有するシリコン基板と、
前記シリコン基板の第1の領域上に設けられた酸化シリコン層と、
前記酸化シリコン層上に設けられ面方位が{100}である第2の面を有し、アンドープである第1のシリコン層と、
六方晶の結晶構造を有し、前記シリコン基板の前記第1の領域と異なる第2の領域上に設けられたワイドバンドギャップ化合物半導体層と、
を備える半導体装置。 - 前記ワイドバンドギャップ化合物半導体層の上に設けられた第1のソース電極と、
前記ワイドバンドギャップ化合物半導体層の上に設けられた第1のドレイン電極と、
前記第1のソース電極と前記第1のドレイン電極の間に設けられた第1のゲート電極と、
前記第1のシリコン層の上に設けられたn型のソース領域と、
前記第1のシリコン層の上に設けられたn型のドレイン領域と、
前記ソース領域の上に設けられ、前記第1のゲート電極に電気的に接続された第2のソース電極と、
前記ドレイン領域の上に設けられ、前記第1のソース電極に電気的に接続された第2のドレイン電極と、
前記第2のソース電極と前記第2のドレイン電極の間に設けられたゲート絶縁膜と、
前記ゲート絶縁膜の上に設けられた第2のゲート電極と、
をさらに備える、
請求項3記載の半導体装置。 - 前記ワイドバンドギャップ化合物半導体層は窒化物半導体層である、
請求項1ないし請求項4いずれか一項記載の半導体装置。 - 面方位が{100}の第1の面を有するシリコン基板の第1の領域上に設けられた酸化シリコン層上に設けられ面方位が{111}の第2の面を有しアンドープである第1のシリコン層の上に、六方晶の結晶構造を有するワイドバンドギャップ化合物半導体層を形成し、
前記シリコン基板の前記第1の領域と異なる第2の領域上に第2のシリコン層を形成する、
半導体装置の製造方法。 - 前記ワイドバンドギャップ化合物半導体層の上に第1のソース電極を形成し、
前記ワイドバンドギャップ化合物半導体層の上に第1のドレイン電極を形成し、
前記第1のソース電極と前記第1のドレイン電極の間に第1のゲート電極を形成し、
前記第2のシリコン層の上にn型のソース領域を形成し、
前記第2のシリコン層の上にn型のドレイン領域を形成し、
前記ソース領域の上に第2のソース電極を形成し、
前記ドレイン領域の上に第2のドレイン電極を形成し、
前記第2のソース電極と前記第2のドレイン電極の間にゲート絶縁膜を形成し、
前記ゲート絶縁膜の上に第2のゲート電極を形成し、
前記第1のゲート電極と前記第2のソース電極を電気的に接続し、
前記第1のソース電極と前記第2のドレイン電極を電気的に接続し、
前記第2のシリコン層はp型である、
請求項6記載の半導体装置の製造方法。
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