WO2022249391A1 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- WO2022249391A1 WO2022249391A1 PCT/JP2021/020172 JP2021020172W WO2022249391A1 WO 2022249391 A1 WO2022249391 A1 WO 2022249391A1 JP 2021020172 W JP2021020172 W JP 2021020172W WO 2022249391 A1 WO2022249391 A1 WO 2022249391A1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 74
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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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66848—Unipolar field-effect transistors with a Schottky gate, i.e. MESFET
-
- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66446—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET]
- H01L29/66462—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET] with a heterojunction interface channel or gate, e.g. HFET, HIGFET, SISFET, HJFET, HEMT
-
- 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
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
- H01L29/7786—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT
- H01L29/7787—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT with wide bandgap charge-carrier supplying layer, e.g. direct single heterostructure MODFET
-
- 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
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/80—Field effect transistors with field effect produced by a PN or other rectifying junction gate, i.e. potential-jump barrier
- H01L29/812—Field effect transistors with field effect produced by a PN or other rectifying junction gate, i.e. potential-jump barrier with a Schottky gate
Definitions
- the present invention relates to semiconductor devices.
- Electronic devices that can handle the terahertz frequency band of 0.3 to 3.0 THz as elemental technologies such as high-speed wireless communication using millimeter waves, non-destructive internal inspection using 3D imaging, and component analysis using electromagnetic wave absorption. , and integrated circuits.
- a field-effect transistor made of a compound semiconductor having a particularly high physical property of electron mobility is used as an electronic device having good high-frequency characteristics.
- a field effect transistor includes a semiconductor substrate, a gate electrode formed on the surface of the semiconductor substrate, and a source electrode and a drain electrode formed on both sides of the gate electrode in ohmic connection.
- a high electron mobility transistor which is particularly excellent in high-frequency characteristics, for example, a buffer layer, a channel layer, a barrier layer, and a cap layer are laminated in this order from the substrate side on a semiconductor substrate. composition is used.
- the carrier supply layer is formed on the barrier layer side with respect to the channel layer or on the buffer layer side with respect to the channel layer. In such a configuration, the position and doping amount of the carrier supply layer are designed according to the energy band design.
- Non-Patent Document 1 after forming a resist pattern, a gate insulating film is etched using the resist pattern as a mask to form an opening, and after removing the resist, the formed opening is used as a mask to form a recess stopper layer. Recess etching of the cap layer is performed using this. Thereafter, dry etching using Ar gas is performed to etch the recess stopper layer or the barrier layer in addition to the recess stopper layer in the depth direction, after which the gate electrode is formed to reduce the distance between the gate and the channel.
- a HEMT is manufactured by forming a field-effect transistor structure (Fig. 3).
- Patent Document 1 an extra recess opening is formed on the drain side of the insulating film so that the drain side recess region is wider than the source side recess region, and the recess opening is formed from both the gate opening and the recess opening. , an etchant for recess formation is infiltrated to form an asymmetric recess structure. By depleting carriers over a wide region on the drain electrode side, the drain conductance is reduced and the high-frequency characteristics are improved (FIGS. 1 and 4 of Patent Document 1).
- a semiconductor device includes a channel layer made of a compound semiconductor formed on a substrate, a gate electrode formed on the channel layer, and a source electrode and a drain electrode formed with the gate electrode therebetween. At least one of the source electrode and the drain electrode is formed on the substrate side of the channel layer.
- the distance between the gate electrode and the source/drain electrodes can be further reduced.
- a high speed transistor can be realized.
- FIG. 1A is a cross-sectional view showing the configuration of a semiconductor device according to Embodiment 1 of the present invention.
- FIG. 1B is a cross-sectional view showing the configuration of another semiconductor device according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view showing the configuration of a semiconductor device according to Embodiment 2 of the present invention.
- FIG. 3A is a cross-sectional view showing the configuration of a semiconductor device according to Embodiment 3 of the present invention.
- FIG. 3B is a cross-sectional view showing the configuration of another semiconductor device according to Embodiment 3 of the present invention.
- Embodiment 1 First, a semiconductor device according to Embodiment 1 of the present invention will be described with reference to FIGS. 1A and 1B.
- This semiconductor device comprises a channel layer 102 made of a compound semiconductor formed on a substrate 101, a gate electrode 103 formed on the channel layer 102, a source electrode 104 and a drain formed with the gate electrode 103 interposed therebetween.
- a field effect transistor 100a comprising an electrode 105.
- the source electrode 104 and the drain electrode 105 is formed on the substrate 101 side of the channel layer 102 .
- the field effect transistor 100a has a source electrode 104 formed on the substrate 101 side of the channel layer 102 .
- a field effect transistor 100b in which the drain electrode 105 is formed on the substrate 101 side of the channel layer 102 may be used.
- This semiconductor device also includes a first carrier supply layer 106a formed between the source electrode 104 and the channel layer 102, and a first carrier supply layer 106a formed between the source electrode 104 and the channel layer 102, which is made of a compound semiconductor. and a barrier layer 107a.
- This semiconductor device also includes a second carrier supply layer 106b formed between the drain electrode 105 and the channel layer 102, and a second carrier supply layer 106b formed between the drain electrode 105 and the channel layer 102, which is made of a compound semiconductor.
- a barrier layer 107b is provided.
- the source electrode 104, the first carrier supply layer 106a, and the first barrier layer 107a are formed on the substrate 101 side of the channel layer 102.
- the drain electrode 105, the second carrier supply layer 106b, and the second barrier layer 107b are formed on the substrate 101 side of the channel layer 102.
- the first carrier supply layer 106a and the first barrier layer 107a are provided in the region where at least the source electrode 104 is formed, with the gate electrode 103 interposed therebetween in the gate length direction. can be formed. Also, the second carrier supply layer 106b and the second barrier layer 107b can be formed at least in the region where the drain electrode 105 is formed, with the gate electrode 103 interposed therebetween in the gate length direction.
- This semiconductor device also includes a first contact layer 108a formed between the source electrode 104 and the first barrier layer 107a and made of a compound semiconductor, and a first contact layer 108a formed between the drain electrode 105 and the second barrier layer 107b. , and a second contact layer 108b made of a compound semiconductor.
- the source electrode 104 is formed in ohmic contact with the first contact layer 108a
- the drain electrode 105 is formed in ohmic contact with the second contact layer 108b.
- the field effect transistor 100a and the field effect transistor 100b have a well-known recessed gate structure, and have recessed regions 121 where the gate electrodes 103 are formed.
- a trench 123 is formed on the substrate side of the region where the gate electrode 103 is formed.
- the field effect transistor used as the semiconductor device according to the first embodiment is not limited to the recess gate structure, and may be a field effect transistor having another structure such as an MIS type.
- the recess region 121 separates the second contact layer 108b into the source electrode 104 side and the drain electrode 105 side. Further, the substrate 101 and the first contact layer 108a are separated by the groove 123 into the source electrode 104 side and the drain electrode 105 side.
- the recess region 121 separates the first contact layer 108a into the source electrode 104 side and the drain electrode 105 side. Further, the substrate 101 and the second contact layer 108b are separated by the groove 123 into the source electrode 104 side and the drain electrode 105 side.
- the semiconductor device may also include a first etch stop layer 109a formed between the first contact layer 108a and the first barrier layer 107a.
- the semiconductor device may also include a second etch stop layer 109b formed between the second contact layer 108b and the second barrier layer 107b.
- Each etch stop layer can be made of a material that has a high etching selectivity with respect to an etchant used for etching for forming the recessed regions 121 and the grooves 123 .
- This semiconductor device also includes an insulating layer 124 formed on the first contact layer 108a. Insulating layer 124 has opening 120 . Moreover, in the field effect transistor 100a, the insulating layer 124 is also formed on the drain electrode 105, and an opening is provided in a part of the upper surface of the drain electrode 105. As shown in FIG. Moreover, in the field effect transistor 100b, the insulating layer 124 is also formed on the source electrode 104, and a part of the upper surface of the source electrode 104 is provided with an opening.
- the substrate 101 can be made of semi-insulating InP.
- the channel layer 102 can be made of InGaAs and can have a thickness of 5 to 20 nm.
- the channel layer 102 may be a composite structure of layers of InGaAs and layers of InAs.
- the first barrier layer 107a and the second barrier layer 107b can be made of InAlAs and can have a thickness of 5 to 20 nm.
- well-known sheet doping is performed on the first barrier layer 107a and the second barrier layer 107b so that 1 ⁇ 10 19 cm -3 to 3 ⁇ Si is added as an impurity. It can be a 10 19 cm -3 doped layer.
- the first contact layer 108a and the second contact layer 108b can be made of InGaAs doped with Si to 1 ⁇ 10 19 to 2 ⁇ 10 19 cm ⁇ 3 , for example.
- the first etching stop layer 109a and the second etching stop layer 109b can be made of InP and have a thickness of 2 to 5 nm.
- the compound semiconductor layer described above can be formed by crystal growth by metal-organic vapor phase epitaxy, molecular beam epitaxy, or the like.
- the gate electrode 103 is formed on the insulating layer 124 and partially inserted into the recess region 121 through the opening 120 .
- the gate electrode 103 is formed in the depth direction from the opening 120 to the first etching stop layer 109a or the second etching stop layer 109b.
- the recess length can be approximately 20-200 nm.
- the center position of the trench 123 in the gate length direction is basically aligned with the center of the recess region 121 . Note that this position does not have to be exactly matched.
- the length of the groove 123 in the gate length direction can be approximately 20 to 200 nm, but in view of the difficulty in miniaturization of the backside processing, it can be approximately 10 to 20 ⁇ m.
- the groove 123 may be filled with an insulating compound semiconductor formed by crystal re-growth, an insulating resin, or the like.
- the gate electrode 103 can be formed mainly from a composite structure of Ti, Pt, Au and Mo.
- the gate electrode 103 can be a T-type, a Y-type, or a ⁇ -type in which the area of the upper portion is larger than that of the lower portion in plan view in order to achieve a short gate length while reducing the gate resistance as much as possible.
- a gate insulating layer can also be formed on the etching stop layer.
- the source electrode 104 and the drain electrode 105 can be composed of, for example, a laminated structure of metals such as Ti, Pt, Au, and Ni.
- the insulating layer 124 can be composed of an oxide such as SiO 2 , SiN, Al 2 O 3 , HfO 2 and TiO 2 , a nitride film, or a composite film of these.
- the thickness of the insulating layer 124 may be approximately 10-100 nm, depending on the gate length.
- the source electrode 104 is arranged on the back side of the substrate 101 in the field effect transistor 100a. Therefore, even if the distance between the source and the drain is set to be shorter, the distance between the source electrode 104 and the gate electrode 103 is sufficient, so that the parasitic capacitance generated between the gate electrode 103 and the source electrode 104 is reduced. characteristics can be improved.
- the drain electrode 105 is arranged on the back side of the substrate 101 in the field effect transistor 100b. Therefore, even if the distance between the source and the drain is made shorter, the distance between the drain electrode 105 and the gate electrode 103 is sufficiently large, so that the parasitic capacitance generated between the gate electrode 103 and the drain electrode 105 is reduced. characteristics can be improved.
- This semiconductor device comprises a channel layer 202 made of a compound semiconductor formed on a substrate 201, a gate electrode 203 formed on the channel layer 202, a source electrode 204 and a drain formed with the gate electrode 203 interposed therebetween. It is a field effect transistor comprising an electrode 205 .
- both the source electrode 204 and the drain electrode 205 are formed on the substrate 201 side of the channel layer 202 .
- This semiconductor device also includes a first carrier supply layer 206a formed between the source electrode 204 and the channel layer 202, and a first carrier supply layer 206a formed between the source electrode 204 and the channel layer 202, which is made of a compound semiconductor. and a barrier layer 207a.
- This semiconductor device also includes a second carrier supply layer 206b formed between the drain electrode 205 and the channel layer 202, and a second carrier supply layer 206b formed between the drain electrode 205 and the channel layer 202, which is made of a compound semiconductor.
- a barrier layer 207b is provided.
- the first carrier supply layer 206a, the first barrier layer 207a, the second carrier supply layer 206b, and the second barrier layer 207b are formed on the substrate 101 side of the channel layer 102.
- the first carrier supply layer 206a and the second carrier supply layer 206b are integrally formed, and the first barrier layer 207a and the second barrier layer 207b are integrally formed.
- This semiconductor device also includes a first contact layer 208a formed between the source electrode 204 and the first barrier layer 207a and made of a compound semiconductor, and a first contact layer 208a formed between the drain electrode 205 and the second barrier layer 207b. , and a second contact layer 208b made of a compound semiconductor.
- the source electrode 204 is formed in ohmic contact with the first contact layer 208a
- the drain electrode 205 is formed in ohmic contact with the second contact layer 208b.
- This field effect transistor has a trench 223 on the substrate side of the region where the gate electrode 203 is formed.
- the groove 223 separates the first contact layer 208a and the second contact layer 208b from each other.
- the semiconductor device may also include an etch stop layer 209 formed between the first contact layer 208a and the first barrier layer 207a. Further, in this semiconductor device, an etching stop layer 209 is also formed between the second contact layer 208b and the second barrier layer 207b.
- the etch stop layer 209 can be made of a material with high etching selectivity to the etchant used for etching for forming the grooves 223 .
- this semiconductor device can further include a third carrier supply layer 225 formed between the channel layer 202 and the gate electrode 203, and a third barrier layer 226 made of a compound semiconductor.
- the semiconductor device also includes an insulating layer 224 formed on the first contact layer 208a. Insulating layer 224 has opening 220 .
- the substrate 201 can be made of semi-insulating InP.
- the channel layer 202 can be made of InGaAs and can have a thickness of 5 to 20 nm.
- the channel layer 202 may be a composite structure of layers of InGaAs and layers of InAs.
- the integrally formed first barrier layer 207a and second barrier layer 207b can be made of InAlAs and have a thickness of 5 to 20 nm.
- the first carrier supply layer 206a and the second carrier supply layer 206b, which are integrally formed, are formed by adding Si as an impurity to the first barrier layer 207a and the second barrier layer 207b by well-known sheet doping. It can be a layer doped between 10 19 cm -3 and 3 ⁇ 10 19 cm -3 .
- the first contact layer 208a and the second contact layer 208b can be made of InGaAs doped with Si to 1 ⁇ 10 19 to 2 ⁇ 10 19 cm ⁇ 3 , for example.
- the etching stop layer 209 can be made of InP and have a thickness of 2 to 5 nm.
- the third barrier layer 226 can be made of InAlAs and can have a thickness of 5 to 20 nm.
- the third carrier supply layer 225 can be a layer obtained by doping the third barrier layer 226 with 1 ⁇ 10 19 cm ⁇ 3 to 3 ⁇ 10 19 cm ⁇ 3 of Si as an impurity by well-known sheet doping. can.
- the compound semiconductor layer described above can be formed by crystal growth by metal-organic vapor phase epitaxy, molecular beam epitaxy, or the like.
- the gate electrode 203 is formed on the insulating layer 224, partly inserted through the opening 220, and Schottky-connected to the third barrier layer 226, for example.
- the center position of the trench 223 in the gate length direction is basically formed so as to match the center of the gate electrode 203 in the gate length direction. Note that this position does not have to be exactly matched.
- the length of the groove 223 in the gate length direction can be approximately 20 to 200 nm, but in view of the difficulty in miniaturization of the back side processing, it can be approximately 10 to 20 ⁇ m.
- the groove 223 may be filled with an insulating compound semiconductor formed by crystal re-growth, an insulating resin, or the like.
- the gate electrode 203 can be formed mainly from a composite structure of Ti, Pt, Au and Mo.
- the gate electrode 203 can be a T-type, a Y-type, or a ⁇ -type in which the area of the upper portion is larger than that of the lower portion in plan view in order to achieve a short gate length while reducing the gate resistance as much as possible.
- a gate insulating layer can also be formed on the etching stop layer.
- the source electrode 204 and the drain electrode 205 can be composed of, for example, a laminated structure of metals such as Ti, Pt, Au and Ni.
- the insulating layer 224 can be composed of an oxide such as SiO 2 , SiN, Al 2 O 3 , HfO 2 and TiO 2 , a nitride film, or a composite film of these.
- the thickness of the insulating layer 224 may be approximately 10-100 nm depending on the gate length.
- the source electrode 204 and the drain electrode 205 are arranged on the back side of the substrate 201 . Therefore, even if the distance between the source and the drain is made shorter, the distance between the source electrode 204/drain electrode 205 and the gate electrode 203 can be sufficiently secured. Parasitic capacitance generated in the capacitor is reduced, and high frequency characteristics can be improved.
- This semiconductor device includes, for example, two field effect transistors 100a or 100b, as shown in FIG. 3A.
- the field effect transistors 100 b are formed with the drain electrode 105 in common on the back side of the substrate, and the gate electrodes 103 are connected by the gate wiring 131 .
- An interlayer insulating layer 301 is formed on the two field effect transistors 100b, and a gate wiring 131 is formed on the interlayer insulating layer 301. As shown in FIG. The gate wiring 131 is connected to the gate electrode 103 of each of the two field effect transistors 100b by a through electrode formed through the interlayer insulating layer 301. As shown in FIG. Further, on the interlayer insulating layer 301, a source wiring 132a connected to one source electrode 104 of the two field effect transistors 100b and a source wiring 132b connected to the other source electrode 104 are provided.
- the drain electrode 105 is arranged on the same side as the gate electrode 103, and two drain wirings connected to the drain electrodes 105 of the two field effect transistors 100a are provided on the interlayer insulating layer 301. becomes.
- the source electrode 104 or the drain electrode is arranged on the back side between the two gate electrodes 103 on the front side. This increases the degree of freedom in terms of layout in connection and connection distance between the two gate electrodes, making it possible to further reduce electrical resistance and parasitic capacitance.
- two field effect transistors 100a described using FIG. 1A can be provided.
- two field-effect transistors 100a are formed on the same substrate surface side as the gate electrode 103 and share the drain electrode 105 .
- An interlayer insulating layer 301 is formed on the two field effect transistors 100a, and a drain wiring 133 is formed on the interlayer insulating layer 302. As shown in FIG.
- the drain wiring 133 is connected to the common drain electrode 105 by a through electrode formed by penetrating the interlayer insulating layer 302 . Further, on the interlayer insulating layer 302, a gate wiring 131a connected to one gate electrode 103 of the two field effect transistors 100a and a gate wiring 131b connected to the other gate electrode 103 are provided.
- the source electrode 104 is arranged on the same side as the gate electrode 103, and on the interlayer insulating layer 301 are gate wirings 131a and 131b connected to the gate electrodes 103 of the two field effect transistors 100a. It becomes a configuration with.
- connection distance between the two gate electrodes can be shortened.
- the third embodiment by skillfully laying out the wiring connected to the source electrode 104 or the drain electrode 105 arranged on the back side, it is possible to greatly improve the degree of freedom in circuit design.
- the source wiring connected to the source electrode 104 on the rear surface side is grounded, and a more stable grounding than grounding on the front surface side can be realized.
- the drain wiring connected to the drain electrode 105 on the back side can be routed using a large area on the back side of the substrate, which not only increases the degree of freedom in layout on the front side. , the current capacity can be increased by forming the wiring arranged on the rear surface side thicker.
- the distance between the gate electrode and the source/drain electrodes can be further reduced. Therefore, it becomes possible to realize a high-speed transistor.
- the source electrode or drain electrode for ohmic connection is arranged on the rear surface side, the degree of freedom in layout is increased in the connection and connection distance between the gate electrodes, and electric resistance and parasitic capacitance are further reduced. be able to
- the layout of the wiring for the source electrode or drain electrode placed on the back side can greatly improve the degree of freedom in circuit design, so the layout of the wiring placed on the front side can be improved.
- the wiring on the back side can be formed thicker, and the wiring with a high current capacity can be formed.
- DESCRIPTION OF SYMBOLS 100a Field effect transistor 101... Substrate 102... Channel layer 103... Gate electrode 104... Source electrode 105... Drain electrode 106a... First carrier supply layer 106b... Second carrier supply layer 107a... Second 1 barrier layer 107b second barrier layer 108a first contact layer 108b second contact layer 109a first etching stop layer 109b second etching stop layer 120 opening 121 recess region 123... Groove, 124... Insulating layer.
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Abstract
Description
はじめに、本発明の実施の形態1に係る半導体装置について、図1A、図1Bを参照して説明する。この半導体装置は、基板101の上に形成された化合物半導体からなるチャネル層102と、チャネル層102の上に形成されたゲート電極103と、ゲート電極103を挟んで形成されたソース電極104およびドレイン電極105とを備える電界効果型トランジスタ100aである。
次に、本発明の実施の形態2に係る半導体装置について、図2を参照して説明する。この半導体装置は、基板201の上に形成された化合物半導体からなるチャネル層202と、チャネル層202の上に形成されたゲート電極203と、ゲート電極203を挟んで形成されたソース電極204およびドレイン電極205とを備える電界効果型トランジスタである。
次に、本発明の実施の形態3に係る半導体装置について、図3A、図3Bを参照して説明する。この半導体装置は、例えば、図3Aに示すように、電界効果型トランジスタ100aまたは電界効果型トランジスタ100bを2つ備える。この例では、電界効果型トランジスタ100bが、基板裏面側でドレイン電極105を共通として形成され、ゲート電極103が、ゲート配線131により接続されている。
Claims (8)
- 基板の上に形成された化合物半導体からなるチャネル層と、
前記チャネル層の上に形成されたゲート電極と、
前記ゲート電極を挟んで形成されたソース電極およびドレイン電極と
を備える電界効果型トランジスタから構成され、
前記ソース電極または前記ドレイン電極の少なくとも一方は、前記チャネル層の前記基板の側に形成されている
ことを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記ゲート電極、前記チャネル層の上側の前記ソース電極、または前記チャネル層の上側の前記ドレイン電極を共通として、前記基板の上に前記電界効果型トランジスタを2つ備えることを特徴とする半導体装置。 - 請求項1または2記載の半導体装置において、
前記ソース電極と前記チャネル層との間に形成された第1キャリア供給層と、
前記ソース電極と前記チャネル層との間に形成された、化合物半導体からなる第1障壁層と、
前記ドレイン電極と前記チャネル層との間に形成された第2キャリア供給層と、
前記ドレイン電極と前記チャネル層との間に形成された、化合物半導体からなる第2障壁層と
を備えることを特徴とする半導体装置。 - 請求項3記載の半導体装置において、
前記ソース電極、前記第1キャリア供給層、および前記第1障壁層は、前記チャネル層の前記基板の側に形成されていることを特徴とする半導体装置。 - 請求項3記載の半導体装置において、
前記ドレイン電極、前記第2キャリア供給層、および前記第2障壁層は、前記チャネル層の前記基板の側に形成されていることを特徴とする半導体装置。 - 請求項5記載の半導体装置において、
前記ソース電極、前記第1キャリア供給層、および前記第1障壁層は、前記チャネル層の前記基板の側に形成され、
前記第1キャリア供給層と前記第2キャリア供給層とは一体に形成され、
前記第1障壁層と前記第2障壁層とは一体に形成されている
ことを特徴とする半導体装置。 - 請求項6記載の半導体装置において、
前記チャネル層と前記ゲート電極との間に形成された第3キャリア供給層をさらに備えることを特徴とする半導体装置。 - 請求項3~7のいずれか1項に記載の半導体装置において、
前記ソース電極と前記第1障壁層との間に形成されて、化合物半導体からなる第1コンタクト層と、
前記ドレイン電極と前記第2障壁層との間に形成されて、化合物半導体からなる第2コンタクト層と
を備え、
前記ソース電極は、前記第1コンタクト層にオーミック接続して形成され、
前記ドレイン電極は、前記第2コンタクト層にオーミック接続して形成されている
ことを特徴とする半導体装置。
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JP3715557B2 (ja) | 2001-08-08 | 2005-11-09 | 日本電信電話株式会社 | 電界効果トランジスタの製造方法 |
WO2008096521A1 (ja) * | 2007-02-07 | 2008-08-14 | Nec Corporation | 半導体装置 |
JP2012044113A (ja) * | 2010-08-23 | 2012-03-01 | Fujitsu Ltd | 半導体装置及びその製造方法 |
WO2017110267A1 (ja) * | 2015-12-24 | 2017-06-29 | ソニー株式会社 | トランジスタ、半導体装置、電子機器、およびトランジスタの製造方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP3715557B2 (ja) | 2001-08-08 | 2005-11-09 | 日本電信電話株式会社 | 電界効果トランジスタの製造方法 |
WO2008096521A1 (ja) * | 2007-02-07 | 2008-08-14 | Nec Corporation | 半導体装置 |
JP2012044113A (ja) * | 2010-08-23 | 2012-03-01 | Fujitsu Ltd | 半導体装置及びその製造方法 |
WO2017110267A1 (ja) * | 2015-12-24 | 2017-06-29 | ソニー株式会社 | トランジスタ、半導体装置、電子機器、およびトランジスタの製造方法 |
Non-Patent Citations (1)
Title |
---|
T. SUEMITSU ET AL.: "Improved Recessed-Gate Structure for Sub-0.1-um-Gate InP-Based High Electron Mobility Transistors", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 37, no. 1363-1372, 1998 |
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