WO2023042568A1 - pn接合ダイオード - Google Patents
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- WO2023042568A1 WO2023042568A1 PCT/JP2022/029845 JP2022029845W WO2023042568A1 WO 2023042568 A1 WO2023042568 A1 WO 2023042568A1 JP 2022029845 W JP2022029845 W JP 2022029845W WO 2023042568 A1 WO2023042568 A1 WO 2023042568A1
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- 239000004065 semiconductor Substances 0.000 claims abstract description 132
- 239000013078 crystal Substances 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 11
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 8
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910018565 CuAl Inorganic materials 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910018572 CuAlO2 Inorganic materials 0.000 abstract 1
- 229910020751 SixGe1-x Inorganic materials 0.000 abstract 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 abstract 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 abstract 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 73
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 23
- 239000000463 material Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 239000000758 substrate Substances 0.000 description 14
- 230000000630 rising effect Effects 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 9
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- 238000005036 potential barrier Methods 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 3
- 229910001195 gallium oxide Inorganic materials 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000012431 wafers Nutrition 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 102100031786 Adiponectin Human genes 0.000 description 1
- 101000775469 Homo sapiens Adiponectin Proteins 0.000 description 1
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- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
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- 238000004549 pulsed laser deposition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/201—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds including two or more compounds, e.g. alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/868—PIN diodes
Definitions
- the present invention relates to pn junction diodes.
- a pn junction diode in which an n-type semiconductor layer made of Ga 2 O 3 -based single crystal and a p-type semiconductor layer made of NiO are laminated (see Patent Document 1). Since it is difficult to form p-type Ga 2 O 3 , in the pn junction diode described in Patent Document 1, a NiO single crystal capable of forming a Ga 2 O 3 -based single crystal hetero pn junction is the p-type semiconductor. It is used as a layer material.
- Patent Document 1 discloses a trench junction comprising an n-type semiconductor layer made of Ga 2 O 3 -based single crystal having a trench and a p-type semiconductor layer made of NiO embedded in the trench of the n-type semiconductor layer.
- a barrier Schottky (JBS) diode is disclosed.
- JBS barrier Schottky
- Schottky barrier diodes can have a lower rise voltage in forward characteristics than pn junction diodes, but there is a problem that leak current may occur due to the tunneling phenomenon at the Schottky junction interface. .
- the pn junction between the n-type semiconductor layer and the p-type semiconductor layer in the trench suppresses leakage current caused by the tunneling phenomenon at the Schottky junction interface, realizing a low start-up voltage and suppressing leakage current. are compatible.
- Patent Document 1 since the JBS diode described in Patent Document 1 has a complicated structure in which a p-type semiconductor layer is embedded in trenches, complicated processes are required for its manufacture.
- An object of the present invention is to provide a pn junction diode capable of achieving both a low start-up voltage and suppression of leakage current, even if it has a simple structure.
- one aspect of the present invention provides the following pn junction diodes [1] to [4].
- An n-type semiconductor single crystal having a composition of (GaxAlyIn1 - xy ) 2O3 (0 ⁇ x ⁇ 1 , 0 ⁇ y ⁇ 1 , 0 ⁇ x+y ⁇ 1) type semiconductor layer and Cu 2 O, NiO, Ag 2 O, Ge, Si x Ge 1-x (0 ⁇ x ⁇ 1), CuInO 2 , CuGaO 2 , CuAlO forming a pn junction with the n-type semiconductor layer 2 , a p-type semiconductor layer made of CuAl x Ga y In 1-xy O 2 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x+y ⁇ 1) or a p-type semiconductor that is CuO; and a pn junction diode having a rising voltage of 1.2 V or less.
- An n-type semiconductor single crystal having a composition of (GaxAlyIn1 - xy ) 2O3 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1 , 0 ⁇ x+y ⁇ 1) and a p-type semiconductor layer made of a p-type semiconductor, which is polycrystalline Si or amorphous Si, forming a pn junction with the n-type semiconductor layer, and having a rising voltage of 1.2 V or less, pn junction diode.
- a pn junction diode comprising: a p-type semiconductor layer, and a p-type semiconductor layer made of a single-crystal Si p-type semiconductor forming a pn junction with the n-type semiconductor layer, and having a rising voltage of 1.2 V or less.
- the present invention it is possible to provide a pn junction diode capable of achieving both a low start-up voltage and suppression of leakage current, even if it has a simple structure.
- FIG. 1 is a vertical cross-sectional view of a pn junction diode according to an embodiment of the invention.
- FIG. 1 is a vertical sectional view of a pn junction diode 1 according to an embodiment of the invention.
- the pn junction diode 1 includes an n-type semiconductor layer 11 made of a single crystal of an n-type Ga 2 O 3 -based semiconductor, and a p-type semiconductor layer 12 made of a p-type semiconductor that forms a pn junction with the n-type semiconductor layer 11 . , provided.
- the Ga 2 O 3 -based semiconductor is Ga 2 O 3 , or Ga 2 O 3 to which one or both of Al and In are added, (Ga x Al y In (1-xy) ) 2 O 3 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x+y ⁇ 1).
- Al is added to Ga 2 O 3
- the bandgap widens
- In is added
- the single crystal of the Ga 2 O 3 -based semiconductor forming the n-type semiconductor layer 11 typically has a ⁇ -type crystal structure.
- the n-type semiconductor layer 11 is made of a single crystal of an n-type Ga 2 O 3 -based semiconductor. It does not correspond to aggregates of many granular or flake-like fine single crystals. Since the n-type semiconductor layer 11 is made of a Ga 2 O 3 -based semiconductor single crystal, the characteristic on-resistance of the pn junction diode 1 can achieve a value close to the ideal value determined by the performance of the material.
- the n-type semiconductor layer 11 is formed so as to have the same carrier concentration and thickness by using an aggregate of flake-like fine crystals instead of the Ga 2 O 3 -based semiconductor single crystal, It is considered that the characteristic on-resistance of the pn junction diode 1 is several times higher than in the case of using the single crystal of the Ga 2 O 3 based semiconductor, which is not practical.
- the n-type semiconductor layer 11 is a layer made of a single crystal of an n-type Ga 2 O 3 -based semiconductor formed by epitaxial crystal growth on the n-type semiconductor substrate 10.
- a p-type semiconductor layer 12 is laminated on the semiconductor layer 11 .
- An anode electrode 13 is formed on the surface of the p-type semiconductor layer 12 opposite to the n-type semiconductor layer 11
- a cathode electrode 14 is formed on the surface of the n-type semiconductor substrate 10 opposite to the n-type semiconductor layer 11 . It is
- the pn junction diode 1 utilizes the rectifying properties of the pn junction between the n-type semiconductor layer 11 and the p-type semiconductor layer 12 .
- the rising voltage of the pn junction diode 1 is 1.2V or less. Also, the rising voltage of the pn junction diode 1 is, for example, 0.3 V or more.
- the extrapolated straight line and The voltage at the intersection with the horizontal axis is taken as the rising voltage.
- the pn junction diode 1 by applying a forward voltage (positive potential on the anode electrode 13 side) between the anode electrode 13 and the cathode electrode 14, the p-type semiconductor layer 12 and the p-type semiconductor layer 12 viewed from the n-type semiconductor layer 11 A potential barrier at the interface with the n-type semiconductor layer 11 is lowered, and current flows from the anode electrode 13 to the cathode electrode 14 .
- a reverse voltage is applied between the anode electrode 13 and the cathode electrode 14 (negative potential on the anode electrode 13 side)
- current does not flow due to the potential barrier between pn.
- the n-type semiconductor substrate 10 is a substrate made of a single crystal of an n-type Ga 2 O 3 based semiconductor.
- the n-type semiconductor substrate 10 contains donor impurities such as Si and Sn.
- the donor concentration of the n-type semiconductor substrate 10 is, for example, 1.0 ⁇ 10 18 cm ⁇ 3 or more and 1.0 ⁇ 10 20 cm ⁇ 3 or less.
- the thickness of the n-type semiconductor substrate 10 is, for example, 10 ⁇ m or more and 600 ⁇ m or less.
- the n-type semiconductor layer 11 made of n-type Ga 2 O 3 -based single crystal contains donor impurities such as Si and Sn.
- the donor concentration of the n-type semiconductor layer 11 is, for example, 1 ⁇ 10 13 cm ⁇ 3 or more and 1 ⁇ 10 18 cm ⁇ 3 or less.
- the thickness of the n-type semiconductor layer 11 is, for example, 1 ⁇ m or more and 100 ⁇ m or less.
- the height of the potential barrier between the anode electrode 13 and the cathode electrode 14, which corresponds to the theoretical value of the rising voltage, should be 1.2 V or less.
- the electron affinity ⁇ p and work function ⁇ p of the p-type semiconductor that is the material of the p-type semiconductor layer 12 and the electron affinity ⁇ n and work function ⁇ n of the n-type semiconductor that is the material of the n-type semiconductor layer 11 are: It is preferable to satisfy the condition expressed by the formula 0 eV ⁇ n ⁇ p + ⁇ p ⁇ n ⁇ 1.2 eV.
- the above work function is equal to the energy difference between the vacuum level and the Fermi level.
- ⁇ n of (Ga x Al y In (1 ⁇ x ⁇ y) ) 2 O 3 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x+y ⁇ 1), which is the material of the n-type semiconductor layer 11, is It is approximately 0.7 to 4.5 eV, and can be adjusted within these ranges by the composition ratio (values of x, y, and z).
- ⁇ n can be adjusted by the composition ratio (x, y, z) and the carrier concentration Nd of the n-type semiconductor layer, and is approximately 0.7 to 5.5 eV.
- the p-type semiconductor that is the material of the p-type semiconductor layer 12 includes, for example, Cu 2 O, NiO, Ag 2 O, Si, Ge, Si x Ge 1-x (0 ⁇ x ⁇ 1), CuInO 2 , CuGaO 2 , CuAlO 2 , CuAl x Ga y In 1-xy O 2 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x+y ⁇ 1), or CuO.
- these p-type semiconductors may be polycrystalline, single-crystalline, or amorphous.
- the p-type semiconductor that is the material of the p-type semiconductor layer 12 is preferably polycrystalline Si or amorphous Si.
- polycrystalline Si or amorphous Si is used as a p-type semiconductor, the most mature known film formation techniques such as CVD and plasma CVD can be used. It can be controlled with high precision.
- the p-type semiconductor that is the material of the p-type semiconductor layer 12 may be single crystal Si.
- single crystal Si p-type single crystal Si with controlled carrier concentration and high quality can be commercially used.
- the p-type semiconductor layer 12 made of single crystal Si can be bonded to the n-type semiconductor layer 11 by a surface activation bonding method at room temperature, and a safe process that does not use explosive raw material gas or carrier gas used in a CVD apparatus is performed. , it is possible to form a pn junction.
- Table 1 below shows electron affinities ⁇ p and work functions ⁇ p of materials that can be used as materials for the p-type semiconductor layer 12 .
- the value of ⁇ p can be adjusted within the range shown in Table 1 by changing the acceptor concentration of the p-type semiconductor layer 12 .
- the material of the p-type semiconductor layer 12 is single-crystal Si x Ge 1-x , polycrystalline Si x Ge 1-x , or amorphous Si x Ge 1-x , ⁇ p and ⁇ p can also be adjusted.
- a sputtering method, vacuum deposition, MBE, PLD, CVD, direct bonding, a sol-gel method, a spray method, or a coating method can be used.
- the sputtering and vacuum deposition methods have relatively low process costs, it is relatively difficult to obtain a highly crystalline film due to the characteristics of the film forming method, and it is difficult to obtain a desired carrier concentration.
- Cu 2 O can be deposited by sputtering, for example, as described in Non-Patent Document “Applied Physics Letters 111, 093501 (2017)”.
- MBE, PLD, and CVD have a high process cost, but can obtain a single crystal relatively easily, and the background impurity gas concentration can be kept relatively low. It's easy.
- Polycrystalline Si, amorphous Si, polycrystalline Ge, and amorphous Ge can be deposited by known methods such as CVD. Direct bonding can use pre-prepared high quality p-type semiconductor layers.
- the sol-gel method for example, when NiO is formed by the same method, the method described in the non-patent document "Y. Kokubun, S. Kubo, S. Nakagomi, Applied Physics Express 9, 091101 (2016)". can be used.
- the rise voltage of the pn junction diode 1 is about 0.9V.
- the rising voltage of the pn junction diode 1 is about 1.0V. becomes.
- the material of the n-type semiconductor layer 11 should be a single crystal of a Ga 2 O 3 -based semiconductor, and the anode electrode 13 and the cathode electrode 14 should be such that the height of the potential barrier between them is 1.2 V or less. It cannot be less than 2V.
- the pn junction diode described as Example 1 in the above Patent Document 1 Japanese Patent Application Laid-Open No. 2019-36593
- the p-type semiconductor layer is made of NiO.
- the electron affinity ⁇ n of Ga 2 O 3 is 4.0 eV
- the electron affinity ⁇ p of NiO is 1.8 eV
- the work function ⁇ n of Ga 2 O 3 is approximately 4.1 eV
- the work function of NiO Since the function ⁇ p is approximately 5.2 to 5.5 eV, the height of the potential barrier corresponding to the theoretical value of the rise voltage derived from ⁇ n ⁇ p + ⁇ p ⁇ n is approximately 3.3 to 3.5 eV. 0.6V, and the rising voltage never falls below 1.2V.
- the anode electrode 13 is made of a conductive material such as Pt or Ni that forms an ohmic contact with the p-type semiconductor layer 12 .
- the thickness of the anode electrode 13 is, for example, 0.01 ⁇ m or more and 10 ⁇ m or less.
- the portion of the cathode electrode 14 that contacts the n-type semiconductor substrate 10 is made of a conductive material such as Ti that forms an ohmic contact with the Ga 2 O 3 system single crystal. That is, when the cathode electrode 14 has a single-layer structure, the entire cathode electrode 14 is made of Ti or the like, and when it has a multi-layer structure, the layer in contact with the n-type semiconductor substrate 10 is made of Ti or the like. Examples of the multilayer structure of the cathode electrode 14 include Ti/Au, Ti/Al, Ti/Ni/Au, and Ti/Al/Ni/Au.
- the thickness of the cathode electrode 14 is, for example, 0.01 ⁇ m or more and 5 ⁇ m or less.
- the n-type semiconductor layer 11 makes ohmic contact with the cathode electrode 14 .
- the pn junction diode 1 According to the pn junction diode 1 according to the above-described embodiment, it is possible to realize both a low start-up voltage and a suppression of leakage current, even in the case of adopting a simple laminated structure as shown in FIG. Therefore, for example, the pn junction diode 1 can be used to manufacture a power conversion circuit such as an ACDC converter with low power loss and high reliability.
- the loss during diode conduction is proportional to the forward voltage VF , and this VF is obtained by adding the voltage component VR obtained by multiplying the rising voltage Vth by the characteristic on-resistance and the current density during current conduction. Calculated. For example, a 600 V withstand voltage SiC Schottky barrier diode currently on the market has a Vth of about 0.9 V and a characteristic on-resistance of about 1 m ⁇ cm 2 . Therefore, when the current density is 400 A/cm 2 , VF is 1.3V.
- the Bariga figure of merit of SiC is 340
- the Bariga figure of merit of gallium oxide is about 3444
- the gallium oxide diode has about 10 times the figure of merit of the SiC diode. Therefore, according to the pn junction diode 1, a characteristic on-resistance of about 0.1 m ⁇ cm 2 can be realized, and if V th is 1.2 V or less, current conduction at a current density of 400 A/cm 2 can be achieved. VF becomes 1.24 V or less, which is lower than VF of the SiC Schottky barrier diode. That is, the conduction loss can be made smaller than the above SiC Schottky barrier diode.
- the pn junction diode 1 which is a gallium oxide pn diode, can be easily manufactured at low cost by the melt growth method, and since bulk wafers that are easy to machine can be used, bulk wafer manufacturing costs can be reduced. It is superior in manufacturability to SiC Schottky barrier diodes, which require the use of materials that are expensive and difficult to process.
- the pn junction diode 1 has a V th of 1.2 V or less and can surpass the above SiC Schottky barrier diode in terms of both electrical performance and manufacturability, then the above SiC Schottky barrier diode is currently available. It can be used instead of SiC Schottky barrier diodes in the field of application.
- the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the invention.
- the structure of the pn junction diode 1 is not limited to that shown in FIG.
- the shape of the semiconductor layer 12 and the arrangement in the pn junction diode 1 are not particularly limited.
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Abstract
Description
[2](GaxAlyIn1-x-y)2O3(0<x≦1、0≦y<1、0<x+y≦1)の組成を有するn型半導体の単結晶からなるn型半導体層と、前記n型半導体層とpn接合を形成する、多結晶Si又はアモルファスSiであるp型半導体からなるp型半導体層と、を備え、立ち上がり電圧が1.2V以下である、pn接合ダイオード。
[3](GaxAlyIn1-x-y)2O3(0<x≦1、0≦y<1、0<x+y≦1)の組成を有するn型半導体の単結晶からなるn型半導体層と、前記n型半導体層とpn接合を形成する、単結晶Siであるp型半導体からなるp型半導体層と、を備え、立ち上がり電圧が1.2V以下である、pn接合ダイオード。
[4]前記p型半導体の電子親和力χpと仕事関数φp、及び前記n型半導体の電子親和力χnと仕事関数φnが、0eV≦χn-χp+φp-φn≦1.2eVの式で表される条件を満たす、上記[1]~[3]のいずれか1項に記載のpn接合ダイオード。
(pn接合ダイオードの構成)
図1は、本発明の実施の形態に係るpn接合ダイオード1の垂直断面図である。pn接合ダイオード1は、n型のGa2O3系半導体の単結晶からなるn型半導体層11と、n型半導体層11とpn接合を形成する、p型半導体からなるp型半導体層12と、を備える。
上記実施の形態に係るpn接合ダイオード1によれば、図1に示されるような単純な積層構造をとる場合であっても、低い立ち上がり電圧の実現とリーク電流の抑制を両立することができる。このため、例えば、pn接合ダイオード1を用いて、電力損失が小さく、かつ信頼性の高いACDCコンバータなどの電力変換回路を製造することができる。
Claims (4)
- (GaxAlyIn1-x-y)2O3(0<x≦1、0≦y<1、0<x+y≦1)の組成を有するn型半導体の単結晶からなるn型半導体層と、
前記n型半導体層とpn接合を形成する、Cu2O、NiO、Ag2O、Ge、SixGe1-x(0<x<1)、CuInO2、CuGaO2、CuAlO2、CuAlxGayIn1-x-yO2(0<x≦1、0≦y<1、0<x+y≦1)、又はCuOであるp型半導体からなるp型半導体層と、
を備え、
立ち上がり電圧が1.2V以下である、
pn接合ダイオード。 - (GaxAlyIn1-x-y)2O3(0<x≦1、0≦y<1、0<x+y≦1)の組成を有するn型半導体の単結晶からなるn型半導体層と、
前記n型半導体層とpn接合を形成する、多結晶Si又はアモルファスSiであるp型半導体からなるp型半導体層と、
を備え、
立ち上がり電圧が1.2V以下である、
pn接合ダイオード。 - (GaxAlyIn1-x-y)2O3(0<x≦1、0≦y<1、0<x+y≦1)の組成を有するn型半導体の単結晶からなるn型半導体層と、
前記n型半導体層とpn接合を形成する、単結晶Siであるp型半導体からなるp型半導体層と、
を備え、
立ち上がり電圧が1.2V以下である、
pn接合ダイオード。 - 前記p型半導体の電子親和力χpと仕事関数φp、及び前記n型半導体の電子親和力χnと仕事関数φnが、0eV≦χn-χp+φp-φn≦1.2eVの式で表される条件を満たす、
請求項1~3のいずれか1項に記載のpn接合ダイオード。
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Citations (5)
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US5416043A (en) | 1993-07-12 | 1995-05-16 | Peregrine Semiconductor Corporation | Minimum charge FET fabricated on an ultrathin silicon on sapphire wafer |
JP2019036593A (ja) | 2017-08-10 | 2019-03-07 | 株式会社タムラ製作所 | ダイオード |
JP2019067915A (ja) * | 2017-09-29 | 2019-04-25 | 株式会社タムラ製作所 | 電界効果トランジスタ |
WO2019155768A1 (ja) * | 2018-02-09 | 2019-08-15 | 三菱電機株式会社 | 電力用半導体装置 |
JP2021103747A (ja) * | 2019-12-25 | 2021-07-15 | 株式会社ノベルクリスタルテクノロジー | トレンチ型mesfet |
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2021
- 2021-09-17 JP JP2021152316A patent/JP2023044337A/ja active Pending
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2022
- 2022-08-03 CN CN202280062811.7A patent/CN117981091A/zh active Pending
- 2022-08-03 WO PCT/JP2022/029845 patent/WO2023042568A1/ja active Application Filing
Patent Citations (5)
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US5416043A (en) | 1993-07-12 | 1995-05-16 | Peregrine Semiconductor Corporation | Minimum charge FET fabricated on an ultrathin silicon on sapphire wafer |
JP2019036593A (ja) | 2017-08-10 | 2019-03-07 | 株式会社タムラ製作所 | ダイオード |
JP2019067915A (ja) * | 2017-09-29 | 2019-04-25 | 株式会社タムラ製作所 | 電界効果トランジスタ |
WO2019155768A1 (ja) * | 2018-02-09 | 2019-08-15 | 三菱電機株式会社 | 電力用半導体装置 |
JP2021103747A (ja) * | 2019-12-25 | 2021-07-15 | 株式会社ノベルクリスタルテクノロジー | トレンチ型mesfet |
Non-Patent Citations (3)
Title |
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APPLIED PHYSICS LETTERS, vol. 111, 2017, pages 093501 |
H. M. MANASEVITW. I. SIMPSON: "Single-Crystal Silicon on a Sapphire Substrate", JAP, vol. 35, 1964, pages 1349 - 1351 |
M. L. BURGENERR. E. REEDY, MINIMUM CHARGE FET FABRICATED ON AN ULTRATHIN SILICON ON SAPPHIRE WAFER |
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