JP6806307B2 - 窒化物系電子素子およびその製造方法 - Google Patents
窒化物系電子素子およびその製造方法 Download PDFInfo
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- 150000004767 nitrides Chemical class 0.000 title claims description 62
- 238000004519 manufacturing process Methods 0.000 title claims description 27
- 239000011241 protective layer Substances 0.000 claims description 172
- 239000010410 layer Substances 0.000 claims description 62
- 238000000034 method Methods 0.000 claims description 37
- 230000004888 barrier function Effects 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 13
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 238000000059 patterning Methods 0.000 claims description 4
- 239000005871 repellent Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 9
- 239000010408 film Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000000427 thin-film deposition Methods 0.000 description 1
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Description
図1は、本発明の第1実施例に係る窒化物系電子素子の一部の断面構成図である。
図3は、本発明の第2実施例に係る窒化物系電子素子の断面構成図である。
12:チャネル層
13:障壁層
14:第1保護層
20:ドレイン電極
30:第2保護層
40:ドレイン電極パット
50:第3保護層
60:第4保護層
70:ソース電極
80:ゲート電極
90:フィールドプレート
Claims (8)
- 基板、金属である電極および複数の保護層を含む窒化物系電子素子において、
前記保護層のうち、前記電極の上部の一部が露出するように前記電極の一部を覆う少なくとも二つの保護層は、下部の保護層の前記電極の一部を覆う側の端部が露出しないように上部の保護層が前記下部の保護層の前記電極の一部を覆う側の端部を覆うとともに、
前記保護層が相互に接して積層されるチップ水準の側面部には、
前記保護層の端面部が障壁層に直接接触されて、下部に位置する保護層の端部を上部に位置する保護層が覆って前記下部に位置する保護層の端部が露出しないように構成してなる、窒化物系電子素子。 - チップ水準の側面部の間には、ゲート電極、前記電極であるソース電極、およびドレイン電極がそれぞれ一つまたは二つ以上配置される、請求項1に記載の窒化物系電子素子。
- 前記保護層のうち最上層の保護層は疏水性の樹脂材である、請求項1または請求項2に記載の窒化物系電子素子。
- 前記疏水性の樹脂材は、
BCB(BenzoCycloButene)である、請求項3に記載の窒化物系電子素子。 - 前記電極は少なくともドレイン電極パットであり、フィールドプレートを含む、請求項1〜4の何れか一項に記載の窒化物系電子素子。
- 基板の上部にチャネル層、障壁層を順次形成し、保護層と電極を交互に形成する窒化物系電子素子の製造方法において、
前記保護層のうち電極の上部の周辺部に形成される少なくとも二つの保護層を含み、
前記二つの保護層のうち下部の保護層の端部が前記電極の上部に位置するようにパターニングし、
前記二つの保護層のうち上部の保護層は前記下部の保護層の前記電極の上部側の端部を覆って露出しないようにパターニングし、
前記保護層は、
チップ水準の側面部でそれぞれ直接に接して積層され、
前記保護層の端面部が前記障壁層に直接接触されて、上部に位置する保護層が下部に位置する保護層の端部を覆うようにパターニングする、窒化物系電子素子の製造方法。 - 前記保護層の最上層に位置する保護層はBCB(BenzoCycloButene)を塗布し、パターニングしてなる、請求項6に記載の窒化物系電子素子の製造方法。
- 前記電極は、
少なくともドレイン電極パットであり、選択的にフィールドプレートをさらに含む、請求項6または7に記載の窒化物系電子素子の製造方法。
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