CN103762235A - AlGaN/GaN high-voltage device based on super junction leakage field plate and manufacturing method thereof - Google Patents
AlGaN/GaN high-voltage device based on super junction leakage field plate and manufacturing method thereof Download PDFInfo
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- 229910002704 AlGaN Inorganic materials 0.000 title claims abstract description 114
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 230000004888 barrier function Effects 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 229910002601 GaN Inorganic materials 0.000 claims description 89
- 238000001259 photo etching Methods 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 229910052733 gallium Inorganic materials 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000001312 dry etching Methods 0.000 claims description 12
- 238000005566 electron beam evaporation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000002161 passivation Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 3
- 238000004151 rapid thermal annealing Methods 0.000 claims description 3
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 3
- 238000002955 isolation Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses an AlGaN/GaN high-voltage device based on a super junction leakage field plate and a manufacturing method thereof. The high-voltage device structurally comprises a substrate, a GaN buffer layer, an intrinsic GaN (or AlGaN) channel layer, an A1N isolation layer and an A1GaN barrier layer from bottom to top. A source electrode, a grid electrode and a composite drain electrode are arranged on the A1GaN barrier layer. The composite drain electrode comprises a drain electrode and a drain electrode field plate. A linear A1GaN layer, a grid source field plate, a P-type GaN (or InGaN) layer and a base electrode are arranged between grid sources and between the grid leaks. The AlGaN/GaN high-voltage device based on the super junction leakage field plate has the advantages that the 2DEG concentration of a first area, the 2DEG concentration of a second area, and the 2DEG concentration of a third area are increased at the device breakover time, so that resistance is reduced, and device breakover resistance is reduced; the 2DEG concentration of the first area, the 2DEG concentration of the second area, and the 2DEG concentration of the third area at device cut-off time are the same as the 2DEG concentration of the first area, the 2DEG concentration of the second area, and the 2DEG concentration of the third area at the device breakover time, so that the width of an device exhausted area is increased, the distribution of an electric field is changed, and device breakdown voltage is increased; a composite drain electrode structure and a grid source field plate ensure that electric field peak value cannot occur at the edge of the drain electrode and the boundary of a source close to a grid, so that the breakdown voltage is increased.
Description
Technical field
The present invention relates to a kind of high tension apparatus and preparation method thereof, be specifically related to a kind of AlGaN/GaN high pressure based on super junction leakage field plate, high tension apparatus and the making thereof of low on-resistance, the AlGaN/GaN High Electron Mobility Transistor that can be used for making high pressure low on-resistance, belongs to microelectronics technology.
Background technology
Third generation broad stopband gap semiconductor take SiC and GaN as representative is large with its energy gap in recent years, breakdown electric field is high, thermal conductivity is high, saturated electrons speed is large and the characteristic such as heterojunction boundary two-dimensional electron gas height, is subject to extensive concern.In theory, utilize the devices such as high electron mobility transistor (HEMT) that these materials make, LED, laser diode LD to there is obvious advantageous characteristic than existing device, therefore researcher has carried out extensive and deep research to it both at home and abroad in the last few years, and has obtained the achievement in research attracting people's attention.
AlGaN/GaN heterojunction high electron mobility transistor (HEMT) is demonstrating advantageous advantage aspect high-temperature device and HIGH-POWERED MICROWAVES device, and pursuit device high-frequency, high pressure, high power have attracted numerous research.In recent years, make higher frequency high pressure AlGaN/GaN HEMT and become the another study hotspot of concern.Due to after AlGaN/GaN heterojunction grown, just there are a large amount of two-dimensional electron gas 2DEG in heterojunction boundary, and its mobility is very high, and therefore we can obtain higher device frequency characteristic.Aspect raising AlGaN/GaN heterojunction electron mobility transistor puncture voltage, people have carried out a large amount of research, find that puncturing of AlGaN/GaN HEMT device mainly occurs in grid by drain terminal, therefore will improve the puncture voltage of device, must make the electric field redistribution in grid leak region, especially
Be to reduce the electric field of grid by drain terminal, for this reason, people have proposed to adopt the method for field plate structure:
1. adopt field plate structure.Referring to Yuji Ando, Akio Wakejima, the Novel AlGaN/GaN dual-field-plate FET with high gain of Yasuhiro Okamoto etc., increased linearity and stability, IEDM2005, pp.576-579, mono-kind of 2005(has two field plate field-effect transistors of high-gain, high linearity and stability).In AlGaN/GaN HEMT device, adopt grid field plate and source field plate structure simultaneously, the puncture voltage of device is brought up to the 250V adopting two field plates from the 125V of independent employing grid field plate, and reduced gate leakage capacitance, improved the linearity and the stability of device.
2. adopt super-junction structures.Referring to Akira Nakajima, Yasunobu Sumida, GaN based super heterojunction field effect transistors using the polarization junction concept(super junction field effect transistor based on GaN that utilizes polarization to tie of Mahesh H).In this device architecture, have 2DEG and 2DEH simultaneously, when grid forward bias, there is not any variation in the concentration of 2DEG, therefore the conducting resistance of device can not increase, when grid reverse bias, 2DEG in raceway groove can exhaust due to electric discharge, thereby has improved the puncture voltage (being increased to 560V from 110V) of device, and conducting resistance is 6.1m Ω cm
2.
But all there is the weak point that conducting resistance is larger in the high tension apparatus with above-mentioned two kinds of structures.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of structure of the AlGaN/GaN high tension apparatus based on super junction leakage field plate that meets the application requirements to high pressure, low on-resistance, and there is the method for this AlGaN/GaN high tension apparatus based on super junction leakage field plate of good controllability and repeated making.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of AlGaN/GaN high tension apparatus based on super junction leakage field plate, it is characterized in that, comprise successively from bottom to up: substrate, GaN resilient coating, intrinsic GaN channel layer or AlGaN channel layer, AlN separator and AlGaN barrier layer, on AlGaN barrier layer, along continuous straight runs has successively: source electrode, grid and compound drain electrode, aforementioned compound drain electrode comprises: drain electrode, by aforementioned drain electrode upwards and the drain electrode field plate extending to form to grid direction simultaneously, between source electrode and grid, AlGaN barrier layer top extension between grid and compound drain electrode has linear AlGaN layer, the top of the online property of drain electrode field plate AlGaN layer, aforementioned grid also extends to form to source electrode direction the Gate source field plate contacting with linear AlGaN layer upper surface, on linear AlGaN layer between grid and compound drain electrode, extension has P type GaN epitaxial loayer, and there is the base stage being electrically connected with grid on P type GaN epitaxial loayer, linear AlGaN layer between grid and compound drain electrode, the width of P type GaN epitaxial loayer reduces successively, aforementioned AlGaN barrier layer is comprised of the i type AlGaN layer of lower floor and the N-shaped AlGaN layer on upper strata, the upper surface of aforementioned source electrode, grid, compound drain electrode and base stage is also formed with and adds thick electrode, and the both sides that add thick electrode are all formed with passivation layer.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, aforesaid substrate is sapphire, carborundum, GaN or MgO.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, in aforementioned AlGaN barrier layer, the ratio of component of Al and Ga can regulate, and the component of Al, Ga, N is respectively x, 1-x, 1,1>x>0.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, it is characterized in that, in aforementioned linear AlGaN layer, the component of Al is increased to y by x linearity, and the component of Al and Ga can regulate, the component of Al, Ga, N is respectively y, 1-y, 1,1>y>x>0.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, it is characterized in that, in aforementioned intrinsic AlGaN channel layer, the component of Al is less than x, and the ratio of component of Al and Ga can regulate, the component of Al, Ga, N is respectively z, 1-z, 1,1>x>z>0.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, aforementioned passivation layer is SiN, Al
2o
3or HfO
2.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, the width <1 μ m on the online property of aforementioned drain electrode field plate AlGaN layer.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, the width≤1 μ m of aforementioned grid source field plate.
The aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, aforementioned p-type GaN layer is replaced by P type InGaN layer, and in aforementioned P type InGaN layer, the constant or In component of In component increases gradually.
The method of making the aforesaid AlGaN/GaN high tension apparatus based on super junction leakage field plate, is characterized in that, comprises the following steps:
(1) the linear AlGaN/AlGaN/GaN material of epitaxially grown p-GaN/ material is carried out to organic washing, by mobile washed with de-ionized water and put into HCl:H
2in the solution of O=1:1, corrode 30-60s, finally by mobile washed with de-ionized water and with high pure nitrogen, dry up;
(2) the AlGaN/GaN heterojunction material cleaning up is carried out to photoetching and dry etching, be formed with source region table top;
(3) the AlGaN/GaN heterojunction material for preparing table top is carried out to photoetching, form the etched area of P type GaN and linear AlGaN layer, put into ICP dry etching reative cell etching, P type GaN epitaxial loayer, the linear AlGaN layer of grid, source electrode and compound drain electrode top are all etched away;
(4) device is carried out to photoetching, then put into electron beam evaporation platform deposit metal ohmic contact Ti/Al/Ni/Au=20/120/45/50nm and peel off, finally in nitrogen environment, carry out the rapid thermal annealing of 850 ℃ of 35s, form ohmic contact;
(5) device for preparing ohmic contact is carried out to photoetching, form the etched area of P type GaN epitaxial loayer, put into ICP dry etching reative cell etching, by between grid and drain electrode between subregion and grid and source electrode the P type GaN epitaxial loayer of Zone Full etch away, form that between grid leak, between first area and second area and grid source the 3rd region;
(6) device for preparing ohmic contact is carried out to photoetching, form base region, then put into electron beam evaporation platform deposit Ni/Au=20/20nm and peel off, finally in atmospheric environment, carry out the annealing of 550 ℃ of 10min, form base stage ohmic contact;
(7) to completing device prepared by base stage, carry out photoetching, form gate metal, grid source field plate and drain electrode field plate region, then put into electron beam evaporation platform deposit Ni/Au=20/200nm and peel off, complete the preparation of grid, grid source field plate and drain electrode field plate;
(8) device that completes preparation is put into PECVD reative cell deposit SiN passivating film, the deposition thickness of passivating film is 200nm-300nm;
(9) device is cleaned again, photoetching development, form the etched area of SiN film, and put into ICP dry etching reative cell etching, the SiN film that source electrode, drain and gate are covered above etches away;
(10) device is cleaned, photoetching development, and put into the thick electrode that adds of electron beam evaporation platform deposit Ti/Au=20/200nm, complete the preparation of integral device.
Usefulness of the present invention is:
1, between grid leak, between first area, second area and grid source, the formation in the 3rd region makes: during break-over of device, the 2DEG concentration in first area, second area and the 3rd region increases, and resistance is reduced, and has reached the object that reduces device conducting resistance; The 2DEG of device when cut-off first area is reduced, and the 2DEG of second area is identical during with break-over of device, has increased the width of device depletion region, has changed Electric Field Distribution, has reached the object of raising device electric breakdown strength;
2, the present invention adopts compound drain electrode structure and grid source field plate, has guaranteed that peak electric field there will not be the boundary near source at drain edge and grid, has reached the object that improves device electric breakdown strength;
3, method of the present invention, has good controllability and repeatability.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of a specific embodiment of high tension apparatus of the present invention;
Fig. 2 is the fabrication processing figure of high tension apparatus of the present invention.
The implication of Reference numeral in figure: 1-substrate, 2-GaN resilient coating, 3-intrinsic GaN channel layer, 4-AlN separator, 5-AlGaN barrier layer, 501-i type AlGaN layer, 502-n type AlGaN layer, 6-source electrode, 7-grid, 8-drain electrode, the 9-field plate that drain, 10-linearity AlGaN layer, 11-Gate source field plate, 12-P type GaN epitaxial loayer, 13-base stage, 14-adds thick electrode, 15-passivation layer, and D1 represents that first area, D2 represent that second area, D3 represent the 3rd region.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to concrete introduction.
First, introduce the structure of the AlGaN/GaN high tension apparatus based on super junction leakage field plate of the present invention.
With reference to Fig. 1, AlGaN/GaN high tension apparatus based on super junction leakage field plate of the present invention, its structure comprises from bottom to up successively: substrate 1, GaN resilient coating 2, intrinsic GaN channel layer 3(intrinsic GaN channel layer 3 can also replace with AlGaN channel layer), AlN separator 4 and AlGaN barrier layer 5, AlGaN barrier layer 5 is comprised of the i type AlGaN layer 501 of lower floor and the N-shaped AlGaN layer 502 on upper strata, wherein, on AlGaN barrier layer 5, along continuous straight runs has successively: source electrode 6, grid 7 and compound drain electrode, compound drain electrode comprises: drain electrode 8, by draining for 8 whiles upwards and the drain electrode field plate 9 extending to form to grid 7 directions.Above the AlGaN barrier layer 5 between source electrode 6 and grid 7, between grid 7 and compound drain electrode, extension has linear AlGaN layer 10, drain electrode field plate 9 is above linear AlGaN layer 10, grid 7 also extends to form to source electrode 6 directions the Gate source field plate 11 contacting with linear AlGaN layer 10 upper surface, the width≤1 μ m of Gate source field plate 11; On linear AlGaN layer 10 between grid 7 and compound drain electrode, extension has P type GaN epitaxial loayer 12(P type GaN epitaxial loayer 12 to replace with P type InGaN layer, in P type InGaN layer, constant or the In component of In component increases gradually), and on P type GaN epitaxial loayer 12, have the base stage 13 being electrically connected with grid 7, the linear AlGaN layer 10 between grid 7 and compound drain electrode, the width of P type GaN epitaxial loayer 12 reduce successively.In addition, the upper surface of source electrode 6, grid 7, compound drain electrode and base stage 13 is also formed with and adds thick electrode 14, and the both sides that add thick electrode 14 are all formed with passivation layer 15, passivation layer 15 preferred SiN, Al
2o
3or HfO
2.
As the preferred scheme of one, substrate is sapphire, carborundum, GaN or MgO.
As the preferred scheme of one, in AlGaN barrier layer 5, the ratio of component of Al and Ga can regulate, and the component of Al, Ga, N is respectively x, 1-x, 1,0<x<1, i.e. Al
xga
1-xn.
More preferably, in linear AlGaN layer 10, the component of Al is increased to y by x linearity, and the ratio of component of Al and Ga can regulate, the component of Al, Ga, N is respectively y, 1-y, 1,1>y>x>0, i.e. Al
yga
1-yn.
Suppose, the thickness of linear AlGaN layer 10 is L, and the distance of the lower surface of the linear AlGaN layer of distance is L
1the weight content of the Al of place is: (y-x) × L
1/ L.
More preferably, in intrinsic AlGaN channel layer, the component of Al is less than x, and the ratio of component of Al and Ga can regulate, and the component of Al, Ga, N is respectively z, 1-z, 1,1>x>z>0, i.e. Al
zga
1-zn.
Next, introduce the method for making the above-mentioned AlGaN/GaN high tension apparatus based on super junction leakage field plate.
With reference to Fig. 2, this manufacture method comprises the following steps:
1, the linear AlGaN/AlGaN/GaN material of epitaxially grown p-GaN/ is carried out to organic washing, by mobile washed with de-ionized water and put into HCl:H
2in the solution of O=1:1, corrode 30-60s, finally by mobile washed with de-ionized water and with high pure nitrogen, dry up.
2, the AlGaN/GaN heterojunction material cleaning up is carried out to photoetching and dry etching, be formed with source region table top.
3, the AlGaN/GaN heterojunction material for preparing table top is carried out to photoetching, form the etched area of P type GaN and linear AlGaN layer, put into ICP dry etching reative cell, process conditions are: upper electrode power is 200W, lower electrode power is 20W, and chamber pressure is 1.5Pa, Cl
2flow be 10sccm, N
2flow be 10sccm, etch period is 5min-8min, and P type GaN epitaxial loayer, the linear AlGaN layer of grid, source electrode and compound drain electrode top are all etched away.
4, device is carried out to photoetching, then put into electron beam evaporation platform deposit metal ohmic contact Ti/Al/Ni/Au=20/120/45/50nm and peel off, finally in nitrogen environment, carry out the rapid thermal annealing of 850 ℃ of 35s, form ohmic contact.
5, the device for preparing ohmic contact is carried out to photoetching, form the etched area of P type GaN epitaxial loayer, put into ICP dry etching reative cell, process conditions are: upper electrode power is 200W, and lower electrode power is 20W, and chamber pressure is 1.5Pa, Cl
2flow be 10sccm, N
2flow be 10sccm, etch period is 3min-5min, the P type GaN epitaxial loayer of subregion between grid and drain electrode is etched away, forming between grid leak first area D1(and be P type GaN epitaxial loayer and the simultaneous region of linear AlGaN layer between grid leak claims) and second area D2(be the region that only has linear AlGaN layer between grid leak), and between grid source, between the 3rd D3(Ji Shan source, region, have the region of linear AlGaN layer).
6, the device for preparing ohmic contact is carried out to photoetching, form base region, then put into electron beam evaporation platform deposit Ni/Au=20/20nm and peel off, finally in atmospheric environment, carry out the annealing of 550 ℃ of 10min, form base stage ohmic contact.
7, to completing device prepared by base stage, carry out photoetching, form gate metal, grid source field plate and drain electrode field plate region, then put into electron beam evaporation platform deposit Ni/Au=20/200nm and peel off, complete the preparation of grid, grid source field plate and drain electrode field plate.
8, by completing device prepared by grid, put into PECVD reative cell deposit SiN passivating film, concrete technology condition is: SiH
4flow be 40sccm, NH
3flow be 10sccm, chamber pressure is 1-2Pa, radio-frequency power is 40W, the SiN passivating film that deposit 200nm-300nm is thick.
9, device is cleaned again, photoetching development, form the etched area of SiN film, and put into ICP dry etching reative cell, process conditions are: upper electrode power is 200W, lower electrode power is 20W, chamber pressure is 1.5Pa, CF
4flow be 20sccm, the flow of Ar gas is 10sccm, etch period is 10min, and source electrode and the SiN film that covers above of drain electrode are etched away.
10, device is cleaned, photoetching development, and put into the thick electrode that adds of electron beam evaporation platform deposit Ti/Au=20/200nm, complete the preparation of integral device.
As can be seen here, method of the present invention has good controllability and repeatability.
Due to high tension apparatus of the present invention, it is formed with: the 3rd region D3 between first area D1, second area D2 and grid source between grid leak, thus make:
(1) during break-over of device, almost identical with the increase of the AlGaN/GaN interface 2DEG concentration under the 3rd region D3 under the D1 of first area, under second area D2, all be greater than the 2DEG concentration in raceway groove, therefore trizonal resistance all reduces to some extent, has reached the object that reduces device conducting resistance;
(2) when device ends (during grid 7 voltages≤threshold voltage), 2DEG in raceway groove under grid 7 is depleted, meanwhile because base stage 13 is electrically connected with grid 7, therefore the 2DEG concentration under the D1 of first area reduces (being even reduced to 50%) to some extent, the width of the depletion region of device is increased to some extent, can bear the region of high electric field and be widened, reach the object that improves device electric breakdown strength; In addition, the 2DEG concentration under second area D2 is identical during with break-over of device, is conducive to the redistribution of electric field.
In addition, because high tension apparatus of the present invention has adopted drain electrode field plate 9 and grid source field plate, guaranteed peak electric field there will not be drain electrode 8 and grid near the boundary in source, device electric breakdown strength is improved again.
To sum up aforementioned, the conducting resistance of high tension apparatus of the present invention when conducting reduced, and puncture voltage when cut-off state is improved, and well taken into account the raising of device electric breakdown strength and reducing of conducting resistance.
It should be noted that, above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (10)
1. the AlGaN/GaN high tension apparatus based on super junction leakage field plate, it is characterized in that, comprise successively from bottom to up: substrate, GaN resilient coating, intrinsic GaN channel layer or AlGaN channel layer, AlN separator and AlGaN barrier layer, on AlGaN barrier layer, along continuous straight runs has successively: source electrode, grid and compound drain electrode, described compound drain electrode comprises: drain electrode, by described drain electrode upwards and the drain electrode field plate extending to form to grid direction simultaneously, between source electrode and grid, AlGaN barrier layer top extension between grid and compound drain electrode has linear AlGaN layer, the top of the online property of drain electrode field plate AlGaN layer, described grid also extends to form to source electrode direction the Gate source field plate contacting with linear AlGaN layer upper surface, on linear AlGaN layer between grid and compound drain electrode, extension has P type GaN epitaxial loayer, and there is the base stage being electrically connected with grid on P type GaN epitaxial loayer, linear AlGaN layer between grid and compound drain electrode, the width of P type GaN epitaxial loayer reduces successively, described AlGaN barrier layer is comprised of the i type AlGaN layer of lower floor and the N-shaped AlGaN layer on upper strata, the upper surface of described source electrode, grid, compound drain electrode and base stage is also formed with and adds thick electrode, and the both sides that add thick electrode are all formed with passivation layer.
2. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, is characterized in that, described substrate is sapphire, carborundum, GaN or MgO.
3. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, it is characterized in that, in described AlGaN barrier layer, the ratio of component of Al and Ga can regulate, the component of Al, Ga, N is respectively x, 1-x, 1,1>x>0.
4. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 3, it is characterized in that, in described linear AlGaN layer, the component of Al is increased to y by x linearity, and the component of Al and Ga can regulate, the component of Al, Ga, N is respectively y, 1-y, 1,1>y>x>0.
5. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 3, it is characterized in that, in described intrinsic AlGaN channel layer, the component of Al is less than x, and the ratio of component of Al and Ga can regulate, the component of Al, Ga, N is respectively z, 1-z, 1,1>x>z>0.
6. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, is characterized in that, described passivation layer is SiN, Al
2o
3or HfO
2.
7. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, is characterized in that, the width <1 μ m on the online property of described drain electrode field plate AlGaN layer.
8. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, is characterized in that, the width≤1 μ m of described grid source field plate.
9. the AlGaN/GaN high tension apparatus based on super junction leakage field plate according to claim 1, is characterized in that, described p-type GaN layer is replaced by P type InGaN layer, and in described P type InGaN layer, the constant or In component of In component increases gradually.
10. the method for making the AlGaN/GaN high tension apparatus based on super junction leakage field plate claimed in claim 1, is characterized in that, comprises the following steps:
(1) the linear AlGaN/AlGaN/GaN material of epitaxially grown p-GaN/ material is carried out to organic washing, by mobile washed with de-ionized water and put into HCl:H
2in the solution of O=1:1, corrode 30-60s, finally by mobile washed with de-ionized water and with high pure nitrogen, dry up;
(2) the AlGaN/GaN heterojunction material cleaning up is carried out to photoetching and dry etching, be formed with source region table top;
(3) the AlGaN/GaN heterojunction material for preparing table top is carried out to photoetching, form the etched area of P type GaN and linear AlGaN layer, put into ICP dry etching reative cell etching, P type GaN epitaxial loayer, the linear AlGaN layer of grid, source electrode and compound drain electrode top are all etched away;
(4) device is carried out to photoetching, then put into electron beam evaporation platform deposit metal ohmic contact Ti/Al/Ni/Au=20/120/45/50nm and peel off, finally in nitrogen environment, carry out the rapid thermal annealing of 850 ℃ of 35s, form ohmic contact;
(5) device for preparing ohmic contact is carried out to photoetching, form the etched area of P type GaN epitaxial loayer, put into ICP dry etching reative cell etching, by between grid and drain electrode between subregion and grid and source electrode the P type GaN epitaxial loayer of Zone Full etch away, form that between grid leak, between first area and second area and grid source the 3rd region;
(6) device for preparing ohmic contact is carried out to photoetching, form base region, then put into electron beam evaporation platform deposit Ni/Au=20/20nm and peel off, finally in atmospheric environment, carry out the annealing of 550 ℃ of 10min, form base stage ohmic contact;
(7) to completing device prepared by base stage, carry out photoetching, form gate metal, grid source field plate and drain electrode field plate region, then put into electron beam evaporation platform deposit Ni/Au=20/200nm and peel off, complete the preparation of grid, grid source field plate and drain electrode field plate;
(8) device that completes preparation is put into PECVD reative cell deposit SiN passivating film, the deposition thickness of passivating film is 200nm-300nm;
(9) device is cleaned again, photoetching development, form the etched area of SiN film, and put into ICP dry etching reative cell etching, the SiN film that source electrode, drain and gate are covered above etches away;
(10) device is cleaned, photoetching development, and put into the thick electrode that adds of electron beam evaporation platform deposit Ti/Au=20/200nm, complete the preparation of integral device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111900203A (en) * | 2020-06-30 | 2020-11-06 | 中国电子科技集团公司第五十五研究所 | GaN-based high-hole mobility transistor and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090072240A1 (en) * | 2007-09-14 | 2009-03-19 | Transphorm Inc. | III-Nitride Devices with Recessed Gates |
| CN102832124A (en) * | 2011-06-15 | 2012-12-19 | 三菱电机株式会社 | Method of manufacturing nitride semiconductor device |
| US20130082277A1 (en) * | 2011-09-30 | 2013-04-04 | Samsung Electro-Mechanics Co., Ltd. | Nitride semiconductor device and manufacturing method thereof |
| CN103035701A (en) * | 2011-09-29 | 2013-04-10 | 富士通株式会社 | Semiconductor device and method for fabricating the same |
| US8436399B2 (en) * | 2009-03-04 | 2013-05-07 | Panasonic Corporation | Semiconductor device |
| CN103400856A (en) * | 2013-07-04 | 2013-11-20 | 西安电子科技大学 | One-dimensional electronic gas GaN-based HEMT (High Electron Mobility Transistor) device adopting selective area epitaxy and preparation method thereof |
-
2014
- 2014-01-22 CN CN201410033431.8A patent/CN103762235B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090072240A1 (en) * | 2007-09-14 | 2009-03-19 | Transphorm Inc. | III-Nitride Devices with Recessed Gates |
| US8436399B2 (en) * | 2009-03-04 | 2013-05-07 | Panasonic Corporation | Semiconductor device |
| CN102832124A (en) * | 2011-06-15 | 2012-12-19 | 三菱电机株式会社 | Method of manufacturing nitride semiconductor device |
| CN103035701A (en) * | 2011-09-29 | 2013-04-10 | 富士通株式会社 | Semiconductor device and method for fabricating the same |
| US20130082277A1 (en) * | 2011-09-30 | 2013-04-04 | Samsung Electro-Mechanics Co., Ltd. | Nitride semiconductor device and manufacturing method thereof |
| CN103400856A (en) * | 2013-07-04 | 2013-11-20 | 西安电子科技大学 | One-dimensional electronic gas GaN-based HEMT (High Electron Mobility Transistor) device adopting selective area epitaxy and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900203A (en) * | 2020-06-30 | 2020-11-06 | 中国电子科技集团公司第五十五研究所 | GaN-based high-hole mobility transistor and preparation method thereof |
| CN111900203B (en) * | 2020-06-30 | 2022-08-16 | 中国电子科技集团公司第五十五研究所 | GaN-based high-hole mobility transistor and preparation method thereof |
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