CN106935643A - HEMT and memory chip - Google Patents

HEMT and memory chip Download PDF

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Publication number
CN106935643A
CN106935643A CN201511031136.XA CN201511031136A CN106935643A CN 106935643 A CN106935643 A CN 106935643A CN 201511031136 A CN201511031136 A CN 201511031136A CN 106935643 A CN106935643 A CN 106935643A
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CN
China
Prior art keywords
layer
electrode
gallium nitride
hemt
oxide layer
Prior art date
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Pending
Application number
CN201511031136.XA
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Chinese (zh)
Inventor
刘美华
陈建国
林信南
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Peking University
Peking University Founder Group Co Ltd
Shenzhen Founder Microelectronics Co Ltd
Original Assignee
Peking University
Peking University Founder Group Co Ltd
Shenzhen Founder Microelectronics Co Ltd
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Publication date
Application filed by Peking University, Peking University Founder Group Co Ltd, Shenzhen Founder Microelectronics Co Ltd filed Critical Peking University
Priority to CN201511031136.XA priority Critical patent/CN106935643A/en
Publication of CN106935643A publication Critical patent/CN106935643A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types 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
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/778Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/41Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2229/00Indexing scheme for semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, for details of semiconductor bodies or of electrodes thereof, or for multistep manufacturing processes therefor

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Junction Field-Effect Transistors (AREA)

Abstract

The invention provides a kind of HEMT and memory chip, wherein HEMT includes:Substrate;Gallium nitride layer and aluminum gallium nitride layer, the side of gallium nitride layer are compound in the top layer of substrate, and the opposite side of gallium nitride layer is compound in the bottom of aluminum gallium nitride layer;Oxide layer, is compound in the top layer of aluminum gallium nitride layer, and oxide layer is provided with the contact hole of at least three insertions;Electrode, electrode includes drain electrode, gate electrode and source electrode, and drain electrode, gate electrode and source electrode are respectively arranged in the contact hole of corresponding at least three insertion in corresponding contact hole.By technical scheme, the boundary defect between gate electrode and drain electrode is reduced, improve the reliability of HEMT.

Description

HEMT and memory chip
Technical field
The present invention relates to technical field of semiconductors, in particular to a kind of high electron mobility crystal Pipe and a kind of memory chip.
Background technology
In the related art, with the development of semiconductor fabrication, with low-power consumption and high speed high pass The power device of characteristic turns into mainstream research direction.
GaN (gallium nitride) is third generation semiconductor material with wide forbidden band, with big energy gap (3.4eV), electron saturation velocities high (2e7cm/s), breakdown electric field (1e10-- high 3e10V/cm), thermal conductivity higher, corrosion-resistant and radiation resistance, and high pressure, high frequency, There is stronger advantage under high temperature, high-power and Flouride-resistani acid phesphatase environmental condition, thus be considered as short research The optimal material of wavelength optoelectronic and high voltagehigh frequency rate high power device.
Specifically, high concentration, high mobility are formed at AlGaN (aluminum gallium nitride)/GaN hetero-junctions Two-dimensional electron gas (2DEG, Two-dimensional electron gas), while hetero-junctions pair 2DEG has good adjustment effect, and GaN base AlGaN/GaN high mobility transistors are power Study hotspot in device.
But, the use of GaN material and undoped intrinsic material so that with low on-resistance HEMT (Hight Electron Mobility Transistor, HEMT) devices compared with Hardly possible is obtained, and for high-power high-frequency device, boundary defect has a strong impact on HEMT Reliability.
Therefore, how to design a kind of new HEMT is turned into improving device reliability Technical problem urgently to be resolved hurrily at present.
The content of the invention
The present invention is based on above mentioned problem, it is proposed that a kind of skill of new HEMT Art scheme, by aluminum gallium nitride and electrode structure (gate electrode, source electrode and drain electrode it Between) oxide layer is set, the boundary defect of aluminum gallium nitride is reduced, tracking current is reduced, improve The reliability of HEMT.
In view of this, the present invention proposes a kind of HEMT, including:Substrate;Nitrogen Change gallium layer and aluminum gallium nitride layer, the side of the gallium nitride layer is compound in the top layer of the substrate, described The opposite side of gallium nitride layer is compound in the bottom of the aluminum gallium nitride layer;Oxide layer, is compound in the nitrogen Change the top layer of gallium aluminium lamination, the oxide layer is provided with the contact hole of at least three insertions;Electrode, it is described Electrode includes drain electrode, gate electrode and source electrode, the drain electrode, the gate electrode Corresponding in the contact hole of corresponding at least three insertion connecing is respectively arranged at the source electrode In contact hole.
In the technical scheme, by aluminum gallium nitride and electrode structure (gate electrode, source electrode And drain electrode between) oxide layer is set, the boundary defect of aluminum gallium nitride is reduced, reduce surface Leakage current, improves the reliability of HEMT.
In the above-mentioned technical solutions, it is preferred that the source electrode includes the first titanium-aluminium-titanium-titanium nitride Composite bed.
In the above-mentioned technical solutions, it is preferred that the drain electrode includes the second titanium-aluminium-titanium-titanium nitride Composite bed, the source electrode and the drain electrode are to separate.
In the above-mentioned technical solutions, it is preferred that the gate electrode includes:Ni-au composite bed, institute State gate electrode and the source electrode is to separate, the gate electrode and the drain electrode are point From.
In the above-mentioned technical solutions, it is preferred that the oxide layer includes:First silicon oxide layer, it is described First silicon oxide layer includes teos layer.
In the technical scheme, include teos layer by setting the first silicon oxide layer, due to just The compactness and reliability of silester layer, further ensure that the resistance to of HEMT Pressure characteristic.
In the above-mentioned technical solutions, it is preferred that the oxide layer also includes:Alumina layer, the oxygen Change the top layer that aluminium lamination is compound in first silicon nitride layer.
In the technical scheme, by setting alumina layer in oxide layer, reduce aln layer and Stress between silicon nitride layer, further improves the reliability of HEMT.
In the above-mentioned technical solutions, it is preferred that the aluminum gallium nitride layer includes intrinsic gallium nitride constructed of aluminium Layer.
In the above-mentioned technical solutions, it is preferred that also include:Separation layer, be compound in the oxide layer and The top layer of the electrode.
In the technical scheme, separation layer is set by the top layer in oxide layer and electrode, in lifter On the premise of part reliability, interference of the spatial electromagnetic signal to HEMT is reduced.
In the above-mentioned technical solutions, it is preferred that the separation layer includes the second silicon oxide layer and/or the Nitride silicon layer.
According to the second aspect of the invention, it is proposed that a kind of memory chip, including:It is any as described above HEMT described in item technical scheme.
By above technical scheme, contacted by by gate electrode and source electrode, eliminate grid and Spacing between source electrode, efficiently reduces the conducting resistance and power consumption of HEMT, Improve the reliability of HEMT.
Brief description of the drawings
Fig. 1 shows that the section of HEMT according to an embodiment of the invention is illustrated Figure;
Fig. 2 shows the schematic block diagram of memory chip according to an embodiment of the invention.
Specific embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, with reference to attached Figure and specific embodiment are further described in detail to the present invention.It should be noted that not In the case of conflict, the feature in embodiments herein and embodiment can be mutually combined.
Many details are elaborated in the following description in order to fully understand the present invention, but, The present invention can also be different from other modes described here to implement using other, therefore, the present invention Protection domain do not limited by following public specific embodiment.
Fig. 1 shows that the structure of HEMT according to an embodiment of the invention is shown It is intended to.
As shown in figure 1, HEMT 100 according to an embodiment of the invention, bag Include:Substrate 1;Gallium nitride layer 2 and aluminum gallium nitride layer 3, the side of the gallium nitride layer 2 is compound in The top layer of the substrate 1, the opposite side of the gallium nitride layer 2 is compound in the aluminum gallium nitride layer 3 Bottom;Oxide layer 4, is compound in the top layer of the aluminum gallium nitride layer 3, and the oxide layer 4 is provided with The contact hole of at least three insertions;Electrode, the electrode includes 51 electrodes of drain electrode, the electrode of grid 52 With the electrode of source electrode 53, the electrode of the drain electrode 51, the electrode of the grid 52 and the electrode of the source electrode 53 It is respectively arranged in the contact hole of corresponding at least three insertion in corresponding contact hole.
In the technical scheme, by aluminum gallium nitride 3 and electrode structure (electrode of grid 52, source Between 51 electrodes of the electrode of pole 53 and drain electrode) oxide layer 4 is set, reduce the interface of aluminum gallium nitride 3 Defect, reduces tracking current, improves the reliability of HEMT.
Wherein, HEMT 100 apply electric load after, gallium nitride layer 2 and nitridation Polarization induces two-dimensional electron gas 7 between gallium aluminium lamination 3, and it has high concentration and high mobility characteristic, While improving device reliability, it is ensured that the manufacture craft of HEMT 100 is compatible In CMOS (Complementary Metal-Oxide-Semiconductor Transistor, compensation payment Category oxide-semiconductor transistors) technique is manufacturing cost so as to reduce.
In the above-mentioned technical solutions, it is preferred that the source electrode 53 includes the first titanium-aluminium-titanium-nitrogen Change titanium composite bed.
In the above-mentioned technical solutions, it is preferred that the drain electrode 51 includes the second titanium-aluminium-titanium-nitrogen Change titanium composite bed, the source electrode 53 and the drain electrode 51 are to separate.
In the above-mentioned technical solutions, it is preferred that the gate electrode 52 includes:Ni-au composite bed, The gate electrode 52 and the source electrode 53 are to separate, the gate electrode 52 and described Drain electrode 51 is to separate.
In the above-mentioned technical solutions, it is preferred that the oxide layer 4 includes:First silicon oxide layer, institute Stating the first silicon oxide layer includes teos layer.
In the technical scheme, include teos layer by setting the first silicon oxide layer, due to just The compactness and reliability of silester layer, further ensure that HEMT 100 Voltage endurance.
In the above-mentioned technical solutions, it is preferred that the oxide layer 4 also includes:Alumina layer, it is described Alumina layer is compound in the top layer of first silicon nitride layer.
In the technical scheme, by setting alumina layer in oxide layer, reduce aln layer and Stress between silicon nitride layer, further improves the reliability of HEMT 100 Property.
In the above-mentioned technical solutions, it is preferred that the aluminum gallium nitride layer 3 includes intrinsic gallium nitride aluminium knot Structure layer.
In the above-mentioned technical solutions, it is preferred that also include:Separation layer 6, is compound in the oxide layer 4 and the top layer of the electrode.
In the technical scheme, separation layer 6 is set by the top layer in oxide layer 4 and electrode, carried On the premise of rising device reliability, spatial electromagnetic signal is reduced to HEMT 100 Interference.
In the above-mentioned technical solutions, it is preferred that the separation layer includes the second silicon oxide layer and/or the Nitride silicon layer.
Fig. 2 shows the schematic block diagram of memory chip according to an embodiment of the invention.
As shown in Fig. 2 memory chip 200 according to an embodiment of the invention, including:As described above HEMT 100 described in any one technical scheme.
Technical scheme is described in detail above in association with accompanying drawing, it is contemplated that proposed in correlation technique How to design a kind of new HEMT to reduce the technical problem of conducting resistance, this Invention proposes a kind of technical scheme of new HEMT, by aluminum gallium nitride and Electrode structure (between gate electrode, source electrode and drain electrode) sets oxide layer, reduces nitrogen Change the boundary defect of gallium aluminium, reduce tracking current, improve HEMT can By property.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for For those skilled in the art, the present invention can have various modifications and variations.It is all in essence of the invention Within god and principle, any modification, equivalent substitution and improvements made etc. should be included in the present invention Protection domain within.

Claims (10)

1. a kind of HEMT, it is characterised in that including:
Substrate;
Gallium nitride layer and aluminum gallium nitride layer, the side of the gallium nitride layer are compound in the table of the substrate Layer, the opposite side of the gallium nitride layer is compound in the bottom of the aluminum gallium nitride layer;
Oxide layer, is compound in the top layer of the aluminum gallium nitride layer, and the oxide layer is provided with least three The contact hole of insertion;
Electrode, the electrode includes drain electrode, gate electrode and source electrode, the drain electrode electricity Pole, the gate electrode and the source electrode are respectively arranged at corresponding at least three insertion In contact hole in corresponding contact hole.
2. HEMT according to claim 1, it is characterised in that
The source electrode includes the first titanium-aluminium-titanium-titanium nitride composite bed.
3. HEMT according to claim 2, it is characterised in that
The drain electrode includes the second titanium-aluminium-titanium-titanium nitride composite bed, the source electrode and described Drain electrode is to separate.
4. HEMT according to claim 3, it is characterised in that described Gate electrode includes:
Ni-au composite bed, the gate electrode and the source electrode are to separate, the grid electricity Pole and the drain electrode are to separate.
5. HEMT according to claim 4, it is characterised in that described Oxide layer includes:First silicon oxide layer, first silicon oxide layer includes teos layer.
6. HEMT according to claim 3, it is characterised in that described Oxide layer also includes:
Alumina layer, the alumina layer is compound in the top layer of first silicon nitride layer.
7. HEMT according to any one of claim 1 to 6, it is special Levy and be, the aluminum gallium nitride layer includes intrinsic gallium nitride constructed of aluminium layer.
8. HEMT according to any one of claim 1 to 6, it is special Levy and be, also include:
Separation layer, is compound in the top layer of the oxide layer and the electrode.
9. HEMT according to any one of claim 1 to 6, it is special Levy and be, the separation layer includes the second silicon oxide layer and/or the second silicon nitride layer.
10. a kind of memory chip, it is characterised in that including:
HEMT as claimed in any one of claims 1-9 wherein.
CN201511031136.XA 2015-12-31 2015-12-31 HEMT and memory chip Pending CN106935643A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110323275A (en) * 2018-03-28 2019-10-11 台湾积体电路制造股份有限公司 Semiconductor structure
CN112133739A (en) * 2019-06-25 2020-12-25 联华电子股份有限公司 High electron mobility transistor and method for adjusting electron density of two-dimensional electron gas

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102891171A (en) * 2011-07-21 2013-01-23 联华电子股份有限公司 Nitride semiconductor device and manufacturing method thereof
CN103456781A (en) * 2012-06-04 2013-12-18 英飞凌科技奥地利有限公司 Compound semiconductor transistor with self aligned gate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102891171A (en) * 2011-07-21 2013-01-23 联华电子股份有限公司 Nitride semiconductor device and manufacturing method thereof
CN103456781A (en) * 2012-06-04 2013-12-18 英飞凌科技奥地利有限公司 Compound semiconductor transistor with self aligned gate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110323275A (en) * 2018-03-28 2019-10-11 台湾积体电路制造股份有限公司 Semiconductor structure
CN112133739A (en) * 2019-06-25 2020-12-25 联华电子股份有限公司 High electron mobility transistor and method for adjusting electron density of two-dimensional electron gas
CN112133739B (en) * 2019-06-25 2024-05-07 联华电子股份有限公司 High electron mobility transistor and method for adjusting electron density of two-dimensional electron gas

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