CN107425063A - The GaAs HEMT with heat to electricity conversion function of internet of things oriented - Google Patents

The GaAs HEMT with heat to electricity conversion function of internet of things oriented Download PDF

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Publication number
CN107425063A
CN107425063A CN201710556123.7A CN201710556123A CN107425063A CN 107425063 A CN107425063 A CN 107425063A CN 201710556123 A CN201710556123 A CN 201710556123A CN 107425063 A CN107425063 A CN 107425063A
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gaas
thermocouple
heat
metal pole
hemt
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CN201710556123.7A
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CN107425063B (en
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廖小平
陈友国
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Southeast University
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Southeast University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/38Cooling arrangements using the Peltier effect

Abstract

The invention discloses a kind of GaAs HEMT with heat to electricity conversion function of internet of things oriented, including:Traditional HEMT source region, grid region, drain region metal electrode layer surrounding, make layer of silicon dioxide layer, be electrically isolated, at the same as making thermocouple reference plane;In silicon dioxide layer, respectively around source electrode, grid and drain electrode 12 thermocouples being made up of thermo-electric metal arm and thermocouple GaAs arm of arrangement, and it is sequentially connected in series by metal connecting line, forms three Thermocouple modules;One end of thermocouple is close to the electrode of place module, electrode of its other end away from place module.The present invention is simple in construction, it is easy to process, energy-conserving and environment-protective, according to Seebeck effect, the heat dissipation problem of HEMT device is effectively alleviated while by realizing that thermoelectric energy is changed around the thermocouple put, and the size of heat-dissipating power can also be detected by Seebeck pressure difference, there is good economical and practical value.

Description

The GaAs HEMT with heat to electricity conversion function of internet of things oriented
Technical field
The present invention relates to a kind of GaAs based hemts (high electron mobility with heat to electricity conversion function of internet of things oriented Transistor) device, belong to microelectromechanical systems (MEMS) technical field.
Background technology
Important component of the Internet of Things as generation information revolution, its development have triggered people in Internet of Things Radio-frequency receiving-transmitting component confesses the concern of power technology.HEMT device is also known as HEMT, is exactly to utilize heterojunction structure The advantages of middle impurity is separated with electronics in space, electronics obtains high mobility, has very high cut-off frequency and very low Noise, apply in microwave LNA, power amplification, high speed static random access memory etc. more.
In recent years as the continuous progress of science and technology, thermoelectric generation are just gradually widened its application field, not only existed In terms of military and high-tech, and good application prospect is also shown at civilian aspect.With the day of energy and environment crisis Benefit is approached, and scientist increases research dynamics in terms of using low-grade and wasted energy source generating, and part achievement in research has been enter into production Industry.Thermo-electric generation system is relatively simple, as long as electricity generation module both ends have the temperature difference can constant electric power output.But, it is warm Poor electricity generation system will solve a subject matter, be how as hot junction heat supply.
Based on thermograde is produced under HEMT device normal work, there is the individual temperature difference than environment temperature, carried for thermo-electric generation Having supplied may.And thermo-electric generation system effectively make use of the used heat under device work, conversion of the heat energy to electric energy is realized. Thereby produce the GaAs HEMT with heat to electricity conversion function applied in Internet of Things communication.
The content of the invention
Goal of the invention:In order to overcome the deficiencies in the prior art, the present invention provides a kind of having for internet of things oriented The GaAs HEMT of heat to electricity conversion function, has the characteristics that simple in construction, easy to process, energy-conserving and environment-protective, using surround The thermocouple of electrode arrangement, realize the radiating for effectively alleviating HEMT device while thermoelectric energy conversion.
Technical scheme:To achieve the above object, the technical solution adopted by the present invention is:
A kind of GaAs HEMT with heat to electricity conversion function of internet of things oriented, including GaAs based hemts (HEMT) and some thermocouples;
Wherein, the GaAs based hemts include GaAs (GaAs) substrate, the intrinsic GaAs set gradually from bottom to up Layer, intrinsic AlGaAs (aluminum gallium arsenide) layer, the N+ type AlGaAs layers of heavy doping, and middle part is provided with grid region on N+ type AlGaAs layers Metal pole;
Grid region metal pole both sides are disposed with the N+ type GaAs layers of heavy doping on the N+ types AlGaAs layers, respectively as source region Ohmic contact GaAs poles, drain region Ohmic contact GaAs poles, and extremely upper point of source region Ohmic contact GaAs poles, drain region Ohmic contact GaAs She Zhi not active area metal pole, drain region metal pole;The source region metal pole, that drain region metal pole bottom is respectively arranged with p-type is heavily doped Miscellaneous source region and drain region, and source region and drain region are extended in intrinsic GaAs layers from N+ type GaAs layers;
Source region metal pole, grid region metal pole, drain region metal pole surrounding are provided with dioxy on the GaAs based hemts SiClx passivation layer, to be electrically isolated, the thermocouple is arranged in silicon dioxide passivation layer;Each thermocouple includes setting side by side The thermo-electric metal arm and thermocouple GaAs arm put, pass through gold between adjacent thermo-electric metal arm and thermocouple GaAs arm Category line is sequentially connected in series.
Further, thermal source is provided for thermocouple by the Temperature Distribution on GaAs based hemts, is realized by thermocouple Thermoelectric energy realizes the radiating of GaAs based hemts, easy to process and energy-conserving and environment-protective while conversion.
Further, the thermocouple respectively around source region metal pole, grid region metal pole, drain region metal pole arrangement and successively Series connection, form three Thermocouple modules;One end of the thermocouple is close to the electrode of place module, and to contact thermal source, its is another Electrode of the end away from place module, with remote thermal source, so as to realize the thermo-electric generation of stability and high efficiency.
Further, each Thermocouple module is provided with two thermocouple extraction poles, and three Thermocouple modules pass through gold Category line is sequentially connected in series, and leaves output stage of two extraction poles as Seebeck pressure difference.Electromotive force is equal to each caused by so Thermocouple module sum, the size of heat-dissipating power is detected further according to the electromotive force of measurement.
Temperature Distribution when further, for HEMT normal works, each Thermocouple module surround place including 12 The electrode arrangement of module and the thermocouple being sequentially connected in series, heat to electricity conversion is realized according to Seebeck effect, thermocouple of connecting is then favourable In increasing exponentially for Seebeck pressure difference.
Further, the size of the temperature difference is detected by detecting Seebeck pressure difference caused by three Thermocouple modules, from And the heat-dissipating power on GaAs based hemts is detected, it is easy to use and be easily achieved.
Beneficial effect:A kind of GaAs based hemts device with heat to electricity conversion function of internet of things oriented provided by the invention Part, relative to prior art, there is advantages below:1st, it is simple in construction, based on existing GaAs techniques and MEMS surface micros Processing, it is easy to accomplish, there is the advantages of cut-off frequency is high, operating rate is fast, short-channel effect is small and noiseproof feature is good;2nd, it is based on Temperature Distribution on HEMT, a series of thermocouples are arranged, HEMT device is effectively alleviated while realizing thermoelectric energy conversion Heat dissipation problem, and detect by Seebeck pressure difference the size of heat-dissipating power when HEMT device works in real time, have good Economical and practical value.
Brief description of the drawings
Fig. 1 is the top view of the GaAs HEMT with heat to electricity conversion function of internet of things oriented in the present invention;
Fig. 2 be the present invention in internet of things oriented the GaAs HEMT with heat to electricity conversion function along P-P ' to Profile;
Fig. 3 be the present invention in internet of things oriented the GaAs HEMT with heat to electricity conversion function along Q-Q ' to Profile;
Fig. 4 be the present invention in internet of things oriented the GaAs HEMT with heat to electricity conversion function along R-R ' to Profile;
Fig. 5 be the present invention in internet of things oriented the GaAs HEMT with heat to electricity conversion function along S-S ' to Profile;
Fig. 6 is thermocouple mould on the GaAs HEMT with heat to electricity conversion function of internet of things oriented in the present invention Thermocouple distribution map in block;
Figure includes:1st, GaAs (GaAs) substrate, 2, intrinsic GaAs layers, 3, intrinsic AlGaAs (aluminum gallium arsenide) layer, 4, N + type AlGaAs layers, 5, source region Ohmic contact GaAs poles, 6, drain region Ohmic contact GaAs poles, 7, grid region metal pole, 8, thermocouple gold Belong to arm, 9, thermocouple GaAs arm, 10, metal connecting line, 11, silicon dioxide passivation layer, 12, source region, 13, drain region, 14, source region gold Belong to pole, 15, drain region metal pole, 16, Thermocouple module, 17, metallic vias, 18, thermocouple extraction pole.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
It is a kind of GaAs HEMT with heat to electricity conversion function of internet of things oriented as Figure 1-5, including GaAs based hemts and some thermocouples;
Wherein, it is the GaAs based hemts include setting gradually from bottom to up GaAs substrates 1, intrinsic GaAs layers 2, intrinsic AlGaAs layers 3, the N+ type AlGaAs layers 4 of heavy doping, and middle part is provided with grid region metal pole 7 on N+ type AlGaAs layers 4;
The both sides of grid region metal pole 7 are disposed with the N+ type GaAs layers of heavy doping on the N+ types AlGaAs layers 4, respectively as source Area Ohmic contact GaAs poles 5, drain region Ohmic contact GaAs poles 6, and source region Ohmic contact GaAs poles 5, drain region Ohmic contact GaAs Source region metal pole 14, drain region metal pole 15 are respectively arranged with pole 6;The source region metal pole 14, the bottom of drain region metal pole 15 point Source region 12 and the drain region 13 of p-type heavy doping are not provided with, and source region 12 and drain region 13 extend to intrinsic GaAs from N+ type GaAs layers In layer 2;
It is provided with the GaAs based hemts around source region metal pole 14, grid region metal pole 7, the surrounding of drain region metal pole 15 Silicon dioxide passivation layer 11, to be electrically isolated, the thermocouple is arranged in silicon dioxide passivation layer 11;Each thermocouple bag Include the thermo-electric metal arm 8 being set up in parallel and thermocouple GaAs arm 9, adjacent thermo-electric metal arm 8 and thermocouple GaAs It is sequentially connected in series between arm 9 by metal connecting line 10.
As shown in fig. 6, the thermocouple arranges around source region metal pole 14, grid region metal pole 7, drain region metal pole 15 respectively And be sequentially connected in series, form three Thermocouple modules 16;The thermocouple is arranged perpendicular to the edge of the electrode of place module, is passed through Temperature Distribution on GaAs based hemts provides thermal source for thermocouple, is realized while realizing that thermoelectric energy is changed by thermocouple The radiating of GaAs based hemts.
In the present embodiment, each Thermocouple module 16 includes the thermocouple and two thermocouple extraction poles 18 of 12 series connection, And three Thermocouple modules 16 are sequentially connected in series by metal connecting line 10, output of two extraction poles 18 as Seebeck pressure difference is left Pole, and then detect heat dissipation work(on GaAs based hemts by detecting Seebeck pressure difference caused by three Thermocouple modules 16 The size of rate.
The preparation method of the GaAs HEMT with heat to electricity conversion function of the internet of things oriented, including it is following Step:
S1:Molecular beam epitaxial growth a layer thickness is 60nm intrinsic GaAs layers 2 on semi-insulated GaAs substrates 1;
S2:In the intrinsic AlGaAs layers 3 that intrinsic Epitaxial growth a layer thickness of GaAs layers 2 is 20nm;
S3:In the N+ type AlGaAs layers 4 that intrinsic Epitaxial growth a layer thickness of AlGaAs layers 3 is 20nm, doping concentration is 1.0E18cm-3, control thickness and doping concentration so that HEMT pipes are enhanced;
S4:It is 3.5E18cm in N+ type AlGaAs layer 4 Epitaxial growth, one layer of doping concentration-3N+ type GaAs layers, table top Corrosion isolation active area, obtains source region Ohmic contact GaAs poles 5, drain region Ohmic contact GaAs poles 6;
S5:One layer of silicon nitride layer is grown on N+ type GaAs layers, photoetching silicon nitride layer, carves source and drain areas, carries out phosphorus (P) Ion implanting, doping concentration 3.5E18cm-3, source region 12 and the drain region 13 of p-type heavy doping are formed, removes silicon nitride;
S6:Photoresist is coated on N+ type GaAs layers, photoetching removes the photoresist of electrode contact locations, is evaporated in vacuo gold germanium Peeled off after ni au, alloying forms Ohmic contact, obtains source region metal pole 14 and drain region metal pole 15;
S7:Photoresist is coated on N+ type AlGaAs layers 4, photoetching removes the photoresist of gate location, grows a layer thickness 0.5um Ti/Pt/Au, the metal on photoresist and photoresist is removed, form the grid region metal pole 7 of Schottky contacts;
S8:The thick SO of one layer of 0.2um are grown around source region metal pole 14, grid region metal pole 7, the surrounding of drain region metal pole 152 Passivation layer 11, and it is chemically-mechanicapolish polished, as the reference plane for making thermocouple;
S9:In SO2Photoresist is coated on passivation layer 11, removes the photoresist of the position of thermocouple GaAs arm 9, and extension is given birth to Long one layer of doping concentration is 1.0E17cm-3N+ p type gallium arensideps, N+ GaAs is anti-carved according to the shape of thermocouple GaAs arm 9, Form thermocouple GaAs arm 9;
S10:Remove SO2The photoresist of the position of thermo-electric metal arm 8 on passivation layer 11, and gold germanium ni au is sputtered as heat Galvanic couple metal arm 8, the thermo-electric metal arm 8 that thickness is 270nm is obtained after stripping;
S11:Photoresist is coated, the thick metal levels of one layer of 0.3um is evaporated and is used as connection thermocouple GaAs arm 9 and thermocouple The metal connecting line 10 of metal arm 8, photoresist is removed, two thermocouple extraction poles 18 are left in each Thermocouple module 16;
S12:As shown in figure 5, one layer of SO is grown on the thermocouple extraction pole 18 of grid region Thermocouple module2Passivation layer 11, it is chemically-mechanicapolish polished, and metallic vias 17 is done in the position of thermocouple extraction pole 18, deposit metallic gold leads to N+ Type GaAs layer horizontal planes;As shown in figure 1, thermocouple extraction pole 18 is attached by depositing one layer of gold, leave two electrodes Output stage as Seebeck pressure difference.
The GaAs HEMT with heat to electricity conversion function of the internet of things oriented of the present invention, connected with 36 Thermocouple.Traditional HEMT source region, grid region, drain region metal electrode layer surrounding, make layer of silicon dioxide layer, carry out electricity every From, while as the reference plane for making thermocouple;Face on silica, 36 are made by thermoelectricity according to the pattern shown in Fig. 6 The thermocouple of even metal arm and thermocouple GaAs arm composition, is connected with metal connecting line.The present invention according to Seebeck effect, Put with 36 thermocouples around source electrode, grid and drain electrode, realize that thermoelectric energy is changed, alleviated while realizing collection of energy Heat dissipation problem, and the size of heat-dissipating power in HEMT device can also be detected by Seebeck pressure difference.
Described above is only the preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (6)

1. the GaAs HEMT with heat to electricity conversion function of a kind of internet of things oriented, it is characterised in that including arsenic Gallium based hemts and some thermocouples;
Wherein, it is the GaAs based hemts include setting gradually from bottom to up GaAs substrates (1), intrinsic GaAs layers (2), intrinsic AlGaAs layers (3), the N+ type AlGaAs layers (4) of heavy doping, and middle part is provided with grid region metal pole on N+ type AlGaAs layers (4) (7);
Grid region metal pole (7) both sides are disposed with the N+ type GaAs layers of heavy doping on the N+ types AlGaAs layers (4), respectively as source Area Ohmic contact GaAs poles (5), drain region Ohmic contact GaAs poles (6), and source region Ohmic contact GaAs poles (5), drain region ohm connect Touch and be respectively arranged with source region metal pole (14), drain region metal pole (15) on GaAs poles (6);The source region metal pole (14), drain region Metal pole (15) bottom is respectively arranged with source region (12) and drain region (13) of p-type heavy doping, and source region (12) and drain region (13) are from N + type GaAs layers are extended in intrinsic GaAs layers (2);
Set on the GaAs based hemts around source region metal pole (14), grid region metal pole (7), drain region metal pole (15) surrounding There is silicon dioxide passivation layer (11), the thermocouple is arranged in silicon dioxide passivation layer (11);Each thermocouple includes arranged side by side The thermo-electric metal arm (8) and thermocouple GaAs arm (9) of setting, adjacent thermo-electric metal arm (8) and thermocouple GaAs It is sequentially connected in series between arm (9) by metal connecting line (10).
2. the GaAs HEMT with heat to electricity conversion function of internet of things oriented according to claim 1, it is special Sign is, thermal source is provided for thermocouple by the Temperature Distribution on GaAs based hemts, realizes that thermoelectric energy turns by thermocouple The radiating of GaAs based hemts is realized while changing.
3. the GaAs HEMT with heat to electricity conversion function of internet of things oriented according to claim 2, it is special Sign is, the thermocouple respectively around source region metal pole (14), grid region metal pole (7), drain region metal pole (15) arrangement and according to Secondary series connection, form three Thermocouple modules (16);Close to the electrode of place module, its other end is remote for one end of the thermocouple The electrode of place module.
4. the GaAs HEMT with heat to electricity conversion function of internet of things oriented according to claim 3, it is special Sign is that each Thermocouple module (16) is provided with two thermocouple extraction poles (18), and three Thermocouple modules (16) pass through Metal connecting line (10) is sequentially connected in series.
5. the GaAs HEMT with heat to electricity conversion function of internet of things oriented according to claim 4, it is special Sign is that each Thermocouple module (16) includes the thermocouple of 12 series connection.
6. the GaAs HEMT with heat to electricity conversion function of internet of things oriented according to claim 4, it is special Sign is, heat dissipation on GaAs based hemts is realized by detecting Seebeck pressure difference caused by three Thermocouple modules (16) The detection of power.
CN201710556123.7A 2017-07-10 2017-07-10 Gallium arsenide-based HEMT device with thermoelectric conversion function and oriented to Internet of things Active CN107425063B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109037062A (en) * 2018-06-28 2018-12-18 杭州电子科技大学 A kind of III-V HEMT device with thermo-electric generation mechanism
CN109037063A (en) * 2018-06-28 2018-12-18 杭州电子科技大学 The preparation method of III-VHEMT device with thermo-electric generation mechanism

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US5665176A (en) * 1993-07-30 1997-09-09 Nissan Motor Co., Ltd. n-Type thermoelectric materials
CN1591904A (en) * 2003-09-05 2005-03-09 株式会社瑞萨科技 Semiconductor device and a method of manufacturing the same
CN101834202A (en) * 2010-04-13 2010-09-15 东南大学 N-type lateral insulated gate bipolar device capable of reducing hot carrier effect
US20160086985A1 (en) * 2014-09-22 2016-03-24 Samsung Electronics Co., Ltd. Pixel for cmos image sensor and image sensor including the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5665176A (en) * 1993-07-30 1997-09-09 Nissan Motor Co., Ltd. n-Type thermoelectric materials
CN1591904A (en) * 2003-09-05 2005-03-09 株式会社瑞萨科技 Semiconductor device and a method of manufacturing the same
CN101834202A (en) * 2010-04-13 2010-09-15 东南大学 N-type lateral insulated gate bipolar device capable of reducing hot carrier effect
US20160086985A1 (en) * 2014-09-22 2016-03-24 Samsung Electronics Co., Ltd. Pixel for cmos image sensor and image sensor including the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109037062A (en) * 2018-06-28 2018-12-18 杭州电子科技大学 A kind of III-V HEMT device with thermo-electric generation mechanism
CN109037063A (en) * 2018-06-28 2018-12-18 杭州电子科技大学 The preparation method of III-VHEMT device with thermo-electric generation mechanism
CN109037063B (en) * 2018-06-28 2021-03-30 杭州电子科技大学 Preparation method of III-VHEMT device with thermoelectric generation mechanism
CN109037062B (en) * 2018-06-28 2021-06-15 杭州电子科技大学 III-V HEMT device with thermoelectric generation mechanism

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