Source: https://patents.google.com/patent/US20060186422?oq=6985872
Timestamp: 2018-03-23 08:00:48
Document Index: 761364302

Matched Legal Cases: ['Application No. 60', 'art 50', 'arts 52', 'art 52', 'art 52', 'arts 52', 'art 54', 'art 56', 'art 56', 'art 58']

US20060186422A1 - Etching a nitride-based heterostructure - Google Patents
Etching a nitride-based heterostructure Download PDF
US20060186422A1
US20060186422A1 US11358303 US35830306A US2006186422A1 US 20060186422 A1 US20060186422 A1 US 20060186422A1 US 11358303 US11358303 US 11358303 US 35830306 A US35830306 A US 35830306A US 2006186422 A1 US2006186422 A1 US 2006186422A1
US11358303
US7429534B2 (en )
Xuhong Hu
Qhalid Fareed
H01S5/34333—Structure or shape of the active region; Materials used for the active region comprising quantum well, or superlattice structures, e.g. single quantum well lasers (SQW lasers), multiple quantum well lasers (MQW lasers), graded index separate confinement heterostructure lasers (GRINSCH lasers) in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser with a well layer based on Ga(In)N or Ga(In)P, e.g. blue laser
An improved solution for producing nitride-based heterostructure(s), heterostructure device(s), integrated circuit(s) and/or Micro-Electro-Mechanical System(s) is provided. A nitride-based etch stop layer that includes Indium (In) is included in a heterostructure. An adjacent layer of the heterostructure is selectively etched to expose at least a portion of the etch stop layer. The etch stop layer also can be selectively etched. In one embodiment, the adjacent layer can be etched using reactive ion etching (RIE) and the etch stop layer is selectively etched using a wet chemical etch. In any event, the selectively etched area can be used to generate a contact or the like for a device.
The current application claims the benefit of co-pending U.S. Provisional Application No. 60/655,193, entitled “Selective Etching of Nitride Semiconductor Heterostructures”, which was filed on Feb. 22, 2005, and which is hereby incorporated herein by reference.
The invention relates generally to nitride-based heterostructures, and more particularly, to producing a nitride-based device, integrated circuit, and/or the like, using an improved etching solution.
During the production (e.g., fabrication, generation, manufacture, etc.) of a heterostructure device, selective etching of one or more layers in the heterostructure device is frequently performed. In general, selective etching removes some or all of a layer of a first material while removing little or none of an adjacent layer of a second material. Using selective etching, layers in the heterostructure device can be configured to form a desired pattern, e.g., partially cover another layer, have a varying thickness, and/or the like.
For example, selective etching can be used to form a recessed gate in a Heterostructure Field Effect Transistor (HFET), such as a Gallium Nitride (GaN)-based HFET. Inclusion of the recessed gate in the GaN-based HFET can increase the breakdown voltage, alleviate non-ideal effects, suppress current instabilities, and/or the like. To date, selective etching approaches rely on the difference between the etching rates for GaN and Aluminum Nitride (AlN) layers. In particular, two etching technologies are currently used to generate recessed gates in AlGaN/GaN HFETs, reactive ion etching (RIE) and chemical (wet) etching under deep Ultraviolet (UV).
However, use of either technology has its drawbacks. For example, the RIE approach damages the two-dimensional electron gas and significantly decreases the HFET saturation current, while the chemical etching approach is slow, making it difficult to achieve a desired etching pattern. Further, neither approach provides a solution for the selective etching of AlN layers, which are widely used in nitride-based electronic and optoelectronic devices.
In view of the foregoing, there exists a need in the art to overcome one or more of the deficiencies indicated herein and/or one or more other deficiencies not expressly discussed herein.
The invention provides an improved solution for producing nitride-based heterostructure(s), heterostructure device(s), integrated circuit(s) and/or Micro-Electro-Mechanical System(s). A nitride-based etch stop layer that includes Indium (In) is included in a heterostructure. An adjacent layer of the heterostructure is selectively etched to expose at least a portion of the etch stop layer. The etch stop layer also can be selectively etched. In one embodiment, the adjacent layer can be etched using reactive ion etching (RIE) and the etch stop layer is selectively etched using a wet chemical etch. In any event, the selectively etched area can be used to generate a contact or the like for a device.
A first aspect of the invention provides a method of producing a nitride-based heterostructure, the method comprising: obtaining a partial nitride-based heterostructure; applying a nitride-based etch stop layer including Indium (In) above the partial nitride-based heterostructure; applying a nitride-based cap layer above the etch stop layer; and selectively etching the cap layer to expose at least a portion of the etch stop layer.
A second aspect of the invention provides a method of producing a nitride-based heterostructure, the method comprising: obtaining a nitride-based heterostructure, the nitride-based heterostructure including an etch stop layer that includes Indium (In); and selectively etching an adjacent layer to the etch stop layer to expose at least a portion of the etch stop layer.
A third aspect of the invention provides a method of producing a nitride-based heterostructure device, the method comprising: obtaining a partial nitride-based heterostructure; applying a nitride-based etch stop layer including Indium (In) above the partial nitride-based heterostructure; applying a nitride-based cap layer above the etch stop layer; and selectively etching the cap layer to expose at least a portion of the etch stop layer.
A fourth aspect of the invention provides a method of producing a nitride-based integrated circuit, the method comprising: producing at least one nitride-based heterostructure device, the producing comprising: obtaining a partial nitride-based heterostructure; applying a nitride-based etch stop layer comprising Indium (In) above the partial nitride-based heterostructure; applying a nitride-based cap layer above the etch stop layer; and generating at least one of a recessed contact, a facet, or a photonic crystal for the device, the generating including selectively etching at least one of: the cap layer or the etch stop layer; and incorporating the nitride-based heterostructure device in the integrated circuit.
FIGS. 1A-B show typical prior art nitride-based heterostructure devices.
FIG. 2 shows a graph of transconductance as a function of gate-source voltage for the nitride-based heterostructure device of FIG. 1B.
FIG. 3 shows an illustrative nitride-based heterostructure according to an embodiment of the invention.
FIG. 4 shows an illustrative nitride-based heterostructure field effect transistor (HFET) that can be produced using the heterostructure of FIG. 3.
FIG. 5 shows a chart of normalized capacitance as a function of voltage for an illustrative HFET configured as shown in FIG. 4.
FIGS. 6A-B show charts of transfer characteristic and transconductance, respectively, as a function of gate-source voltage for an illustrative HFET configured as shown in FIG. 4.
FIG. 7 shows a chart of gate leakage current as a function of gate voltage for an illustrative HFET configured as shown in FIG. 4.
FIG. 8 shows a chart of drain current as a function of drain-source voltage for a conventional HFET and an illustrative HFET configured as shown in FIG. 4.
FIG. 9 shows a chart of microwave output power (Pout) and power added efficiency (PAE) as a function of delivered power for an illustrative HFET configured as shown in FIG. 4.
FIG. 10 shows an alternative HFET according to an embodiment of the invention.
FIG. 11 shows an alternative heterostructure according to an embodiment of the invention.
It is understood that for the purposes of the present invention, Al means Aluminum, B means Boron, C means Carbon, Cl means Chlorine, Ga means Gallium, In means Indium, K means Potassium, Li means Lithium, N means Nitrogen, O means Oxygen, Si means Silicon, Sr means Strontium, Ti means Titanium, and Zn means Zinc. Further, it is understood that the phrase “any solution” means any now known or later developed solution.
As indicated above, the invention provides an improved solution for producing nitride-based heterostructure(s), heterostructure device(s), integrated circuit(s) and/or Micro-Electro-Mechanical System(s). A nitride-based etch stop layer that includes Indium (In) is included in a heterostructure. An adjacent layer of the heterostructure is selectively etched to expose at least a portion of the etch stop layer. The etch stop layer also can be selectively etched. In one embodiment, the adjacent layer can be etched using reactive ion etching (RIE) and the etch stop layer is selectively etched using a wet chemical etch. In any event, the selectively etched area can be used to generate a contact or the like for a device.
The resulting nitride-based devices (e.g., transistors), integrated circuit(s), system(s) can have an improved quality with respect to increased lifetime, reliability, decreased noise, improved manufacturability, and/or the like. For example, a heterostructure field effect transistor (HFET) produced using the invention demonstrated record power levels, achieved a several order of magnitude reduction in leakage current, showed better stability, and an improved linearity. Additionally, producing a recessed gate as described herein can improve device performance and stability as both room and elevated temperatures. By thinning a barrier layer in an HFET, the recessed gate can decrease the threshold voltage, decrease parasitic source resistances, decrease the peak electric filed, and/or the like, resulting in an increase in the device transconductance and breakdown voltage, and alleviating any trapping effects.
Turning to the drawings, FIGS. 1A-B show typical prior art nitride-based heterostructure devices 10A-B. In particular, each device 10A-B is configured to operate as a HFET 10A-B. Each HFET 10A-B includes a nitride-based heterostructure 12, which includes a substrate 14, an AlN buffer layer 16, an i-type GaN layer 18, and an AlGaN layer 20A-B, respectively. Further, each HFET is shown including source and drain contacts 22A-B, and a gate contact 24A-B, respectively.
HFET 10A comprises a standard device structure, while HFET 10B comprises a recessed gate 24B. To this extent, recessed gate 24B can be generated by selectively etching AlGaN layer 20B using, for example, reactive ion etching (RIE). FIG. 2 shows a graph 28 of the transconductance as a function of gate-source voltage for HFET 10B (FIG. 1B). As indicated by graph 28, a longer etch time (e.g., 150 seconds versus 60 seconds) yielded a higher transconductance at a higher gate-source voltage (lower voltage differential) for HFET 10B.
An embodiment of the invention provides a method for producing an alternative nitride-based heterostructure that can be used to produce (e.g., fabricate, generate, manufacture, etc.) various devices, integrated circuits, and/or the like. FIG. 3 shows an illustrative nitride-based heterostructure 30 according to an embodiment of the invention. Heterostructure 30 includes a partial nitride-based heterostructure 12 (also referred to as “partial heterostructure”) that is shown including a substrate 14, a nitride-based buffer layer 16, a nitride-based active layer 18, and a nitride-based barrier layer 20. In one embodiment, partial heterostructure 12 comprises an AlGaN/GaN heterostructure, in which substrate 14 comprises SiC, buffer layer 16 comprises AlN, active layer 18 comprises GaN, and first barrier layer 20 comprises AlGaN.
However, it is understood that various alternatives for partial heterostructure 12 are possible. For example, heterostructure 12 can comprise any type of AlN/GaN/InN based heterostructure. To this extent, substrate 14 could comprise any desired substrate configuration, such as one of: sapphire, AlGaN, GaN, AIN, SiC, Silicon, LiGaO2, SrTiO3, ZnO, and/or the like; buffer layer 16 could comprise any desired buffer layer configuration, such as one of: AlN, GaN, AlGaN, and/or the like; active layer 18 could comprise any desired active layer configuration, such as one of: AlN, GaN, AlGaN, and/or the like; and barrier layer 20 can comprise any desired barrier layer configuration, such as one of: AlN, GaN, AlGaN, and/or the like. In one embodiment, active layer 18 and barrier layer 20 both comprise AlGaN and barrier layer 20 has a molar fraction of Al that is different than a molar fraction of Al for active layer 18. In any event, active layer 18 and barrier layer 20 each can comprise a molar fraction of Al versus Ga that varies anywhere in the range between zero and one hundred percent. Further, one or more layers within heterostructure 12 could include In. For example, instead of active layer 18 comprising AlGaN, it could comprise AlGaInN.
In order to produce nitride-based heterostructure 30, partial nitride-based heterostructure 12 can be obtained using any solution. For example, some or all of partial heterostructure 12 can be purchased from a manufacturer and/or prepared for further processing (e.g., a portion of barrier layer 20 could be removed by, for example, etching). Alternatively, partial heterostructure 12 can be produced using any solution. To this extent, substrate 14 can be obtained, buffer layer 16 can be applied (e.g., deposited) on substrate 14, active layer 18 can be applied (e.g., grown) on buffer layer 16, and barrier layer 20 can be applied (e.g., grown) on active layer 18. It is understood that this process and partial nitride-based heterostructure 12 are only illustrative. To this extent, partial heterostructure 12 could include one or more additional, fewer, and/or different layers, one or more layers that only partially cover another layer, and/or the like.
In any event, barrier layer 20 can comprise a bottom layer of a multi-layer barrier structure 31. To this extent, once partial heterostructure 12 has been obtained, a nitride-based etch stop layer 32 that includes In can be applied above partial heterostructure 12, e.g., on barrier layer 20. Etch stop layer 32 can comprise a thin layer/film, e.g., approximately three nanometers thick, of InGaN, InN, InAlGaN, and/or the like, and can be applied (e.g., grown) using any solution. In one embodiment, etch stop layer 32 comprises InGaN having an In content up to approximately thirty percent, and is applied using migration enhanced metalorganic chemical vapor deposition (MEMOCVD). It is understood that etch stop layer 32 can comprise a molar fraction of In versus Ga that varies anywhere from 0.1% to 100%, with a molar fraction of 100% comprising InN. Subsequently, a nitride-based cap layer 34 (e.g., second barrier layer) can be applied above etch stop layer 32 using any solution. In general, cap layer 34 can include similar content as barrier layer 20, e.g., AIN, GaN, AlGaN, InGaN, and/or the like. In one embodiment, cap layer 34 comprises a textured AlGaN layer.
Nitride-based heterostructure 30 can be further processed to yield desired characteristics for producing any type of nitride-based device and/or integrated circuit. For example, FIG. 4 shows an illustrative nitride-based HFET 40 that can be produced using heterostructure 30 (FIG. 3). In order to product HFET 40, cap layer 34 and etch stop layer 32 each can be selectively etched. To this extent, cap layer 34 can be selectively etched using, for example, reactive ion etching (RIE) with Boron trichloride (BCl3) as an etching agent, to expose etch stop layer 32 in the area(s) within which contacts 22A-B, 24B are to be located. In this case, etch stop layer 32 is used to stop the RIE etching process. Since the RIE etching rate of InN is at least two orders of magnitude lower than that of AlGaN, GaN or other types of layers, InN, InGaN, and the like can serve as an effective etch stop layer for these types of layers that provides for effective control of the etching rate and/or etching pattern. Subsequently, one or more exposed portions of etch stop layer 32 can be selectively etched to expose barrier layer 20. To this extent, etch stop layer 32 can be selectively etched using, for example, wet chemical etching, to expose barrier layer 20 in an area within which contact 24B is to be located. Further, the wet chemical etching can use diluted potassium hydroxide (KOH) or the like.
The etching of one or more layers can be performed as part of a process for incorporating a device component in the heterostructure device and/or integrated circuit. For example, once a desired area within heterostructure 30 (FIG. 3) is exposed, a device component, such as a contact, can be applied to the area using any solution. To this extent, source and drain contacts 22A-B each can be applied to etch stop layer 32, adjacent to cap layer 34. This configuration reduces a resistance of contacts 22A-B. Similarly, recessed gate contact 24B can be applied to barrier layer 20 as shown. It is understood that the process described herein and configuration of HFET 40 are only illustrative. To this extent, numerous variations are possible. For example, source and/or drain contacts 22A-B could be applied to cap layer 34, gate contact 24B could be applied to etch stop layer 32, and/or the like. It is understood that any combination of additional components can be incorporated onto heterostructure 30 based on the desired operational characteristics of the device being produced.
In operation, illustrative HFETs 40 produced as described herein have exhibited several advantages over alternative HFETs. For example, FIG. 5 shows a chart 50 of normalized capacitance as a function of voltage for both a regular HFET (e.g., no recessed gate) and an illustrative HFET 40 (FIG. 4). As shown, the capacitance-voltage depletion voltage for the regular HFET is approximately −9 Volts, while the depletion voltage for HFET 40 is approximately −4.5 Volts. Further, FIGS. 6A-B show charts 52A-B, respectively, of a transfer characteristic and a transconductance of an illustrative HFET 40 as a function of gate-source voltage (Vgs). Chart 52A shows that HFET 40 comprises a maximum saturation current (Ids) of approximately 750 milliamps/millimeter (mA/mm), while chart 52B shows that HFET 40 comprises a maximum transconductance (gm) of approximately 160 milliSiemens/millimeter (mS/mm). Both charts 52A-B show HFET 40 having a pinch-off gate-source voltage of approximately −4 Volts.
Still further, FIG. 7 shows a chart 54 of gate leakage current (Ig) as a function of gate voltage (Vg) for an illustrative HFET 40 (FIG. 4). In particular, the gate leakage current is approximately two microAmps at a −10 Volt gate bias. The relatively low leakage current may indicate a high quality of the surface of barrier layer 20 (FIG. 4) after the etching and other processing required to apply recessed gate contact 24B (FIG. 4) to barrier layer 20.
FIG. 8 shows a chart 56 of drain current (Ids) as a function of drain-source voltage (Vds) for a conventional (i.e., regular) HFET and an illustrative HFET 40 (FIG. 4). In each case, the drain current was measured with the corresponding device channel completely pinched off. Consequently, an abrupt increase of drain current occurs at the point of the drain breakdown voltage. For HFET 40 having a gate to drain space of approximately 2.5 micrometers, the drain breakdown voltage was approximately 122 Volts compared with a drain breakdown voltage of approximately 85 Volts for the conventional HFET, an improvement of nearly fifty percent.
The improved breakdown characteristics shown in chart 56 enable HFET 40 (FIG. 4) to be biased at significantly higher drain voltages, which can be used, for example, to increase microwave output power. To this extent, FIG. 9 shows a chart 58 of microwave output power (Pout) and power added efficiency (PAE) as a function of delivered power for an illustrative HFET 40. HFET 40 was biased using class-A biasing conditions at a frequency of two gigahertz. In this case, the maximum microwave output power was approximately 8.9 Watts/millimeter (W/mm), while a maximum PAE of approximately 40% was measured at an output power of approximately 8.2 W/mm.
It is understood that HFET 40 (FIG. 4) is only illustrative of various configurations for HFETs that can be produced using the invention. For example, FIG. 10 shows an alternative HFET 60 according to an embodiment of the invention. HFET 60 comprises a metal oxide double heterostructure field effect transistor (MOSDHFET) that includes an additional layer 62 that comprises InGaN. By including a double heterostructure and layer 62, one or more aspects of the performance of HFET 60 can be improved, such as a reduced current collapse. Further, HFET 60 includes a dielectric (insulator) layer 64 below recessed gate 24B. Dielectric layer 64 can comprise any type of dielectric material such as, for example, SiO2. Still further, HFET 60 can include a passivation layer 66 that is applied above cap layer 34. Passivation layer 66 can comprise benzocyclobutene (BCB), silicon nitride (Si3N4), or the like, to prevent oxidation of cap layer 34. Alternatively, passivation layer 66 could comprise a dielectric, such as SiO2. Numerous additional types/configurations for an HFET are possible. For example, an alternative HFET could comprise a metal oxide heterostructure field effect transistor (MOSHFET) or MOSDHFET configured similarly to HFET 60, but without additional layer 62.
In order to produce HFET 60, substrate 14 can be obtained, and buffer layer 16, active layer 18, additional layer 62, barrier layer 20, etch stop layer 32, cap layer 34 and passivation layer 66 can be applied in sequence using any solution. Subsequently, passivation layer 66 and cap layer 34 can be selectively etched using any solution, until portions of etch stop layer 32 are exposed for contacts 22A-B, 24B. Further, etch stop layer 32 can be selectively etched (e.g., using wet chemical etching) until a portion of barrier layer 20 is exposed for gate contact 24B. Dielectric layer 64 can be applied on the exposed portion of barrier layer 20, and contacts 22A-B, 24B can be applied to each of the corresponding areas. It is understood that these steps are only illustrative, and numerous alternative steps can be performed to product HFET 60.
Further, the heterostructure can include one or more additional etch stop layers 32 and/or etch stop layer 32 can be in a different location in the heterostructure to assist in selectively etching various other layers of the heterostructure. To this extent, FIG. 11 shows an alternative heterostructure 70 according to an embodiment of the invention. In addition to etch stop layer 32, heterostructure 70 includes an etch stop layer 72 disposed between substrate 14 and buffer layer 16, and an etch stop layer 74 disposed between cap layer 34 and a top layer 76 of, for example, AlGaN. Etch stop layer 74 can facilitate the selective etching of top layer 76, while etch stop layer 72 can facilitate the selective etching of buffer layer 16 and/or substrate 14 as shown. For example, substrate 14 can comprise an AlN, AlGaN, or the like, bulk substrate and etch stop layer 72 can comprise InN, InGaN, or the like. In this case, substrate 14 that can be selectively etched using RIE, and etch stop layer 72 can be selectively etched using wet chemical etching as described herein.
In addition to transistors, such as HFETs, the heterostructure and/or selective etching described herein can be used to generate various types of nitride-based heterostructure devices. For example, heterostructure 30 (FIG. 3) could be used to generate a nitride-based light emitting diode and/or a nitride-based laser. In either case, the inclusion of an etch stop layer that includes In can be used in etching an adjacent layer to generate a contact, a recess, a facet, and/or the like, to obtain desired configuration and/or performance characteristics for the device. Various other types of semiconductor, power switching, microwave, optoelectronic, acousto-optic, and/or the like devices can be produced using the invention. These devices include, for example, photodetectors, gated bipolar junction transistors, gate hot electron transistors, gated heterostructure bipolar junction transistors, sensors (e.g., gas, liquid, pressure, multi-finction pressure and temperature, and/or the like), etc.
Further, the heterostructure and/or selective etching described herein can be used to produce a nitride-based integrated circuit. In this case, the integrated circuit can include one or more devices that are produced by selectively etching one or more layers with an etch stop layer that includes In. To this extent, each device can be incorporated in the integrated circuit using any solution, e.g., by forming physical connections between the device and one or more other devices in the integrated circuit. In one embodiment, the integrated circuit comprises a nitride-based Monolithic Microwave Integrated Circuit that includes one or more active or passive elements produced as described herein. Still further, the heterostructure and/or selective etching described herein can be used to produce a nitride-based Micro-Electro-Mechanical System. In any event, the resulting heterostructure(s), heterostructure device(s), integrated circuit(s) and/or Micro-Electro-Mechanical Systems can be patterned in a periodic fashion to form a photonic crystal using any solution.
1. A method of producing a nitride-based heterostructure, the method comprising:
obtaining a partial nitride-based heterostructure;
applying a nitride-based etch stop layer including Indium (In) above the partial nitride-based heterostructure;
applying a nitride-based cap layer above the etch stop layer; and
selectively etching the cap layer to expose at least a portion of the etch stop layer.
2. The method of claim 1, wherein the cap layer comprises at least one of: Aluminum (Al), Gallium (Ga), or Indium (In).
3. The method of claim 1, wherein the partial nitride-based heterostructure comprises an AlN/GaN/InN based heterostructure.
4. The method of claim 1, wherein the etch stop layer comprises a thin InGaN epilayer.
5. The method of claim 1, wherein the selectively etching uses reactive ion etching (RIE).
6. The method of claim 1, further comprising applying a passivation layer above the cap layer.
7. The method of claim 1, further comprising selectively etching the etch stop layer.
8. The method of claim 7, wherein the selectively etching the etch stop layer uses chemical etching.
9. The method of claim 1, wherein the obtaining includes:
obtaining a substrate;
applying a buffer layer above the substrate;
applying a first layer above the buffer layer; and
applying a second layer above the first layer.
10. The method of claim 9, wherein the second layer has a molar fraction of Al that is different than a molar fraction of Al for the first layer.
11. The method of claim 9, wherein the obtaining further includes:
applying a second etch stop layer including In on at least one of: the substrate, the buffer layer, or the first layer; and
selectively etching at least one of: the substrate, the buffer layer, the first layer, or the second layer such that at least a portion of the second etch stop layer is exposed.
12. The method of claim 1, further comprising applying a dielectric layer above at least one of: the partial nitride-based heterostructure, the etch stop layer or the cap layer.
13. A method of producing a nitride-based heterostructure, the method comprising:
obtaining a nitride-based heterostructure, the nitride-based heterostructure including an etch stop layer that includes Indium (In); and
selectively etching an adjacent layer to the etch stop layer to expose at least a portion of the etch stop layer.
14. The method of claim 13, wherein the adjacent layer comprises a substrate.
15. A method of producing a nitride-based heterostructure device, the method comprising:
16. The method of claim 15, further comprising applying a contact within the etched portion of the partial nitride-based heterostructure.
17. The method of claim 15, wherein the nitride-based heterostructure device comprises one of: a nitride-based heterostructure field effect transistor (HFET), a light emitting diode, a laser, or a micro-electro-mechanical device.
18. The method of claim 15, wherein the selectively etching is performed in order to generate at least one of a recessed contact, or a facet for the device.
19. The method of claim 15, further comprising applying a passivation layer above the cap layer.
20. The method of claim 15, further comprising selectively etching the etch stop layer.
21. The method of claim 15, further comprising applying a dielectric layer above at least one of: the partial nitride-based heterostructure, the etch stop layer or the cap layer.
22. A method of producing a nitride-based integrated circuit, the method comprising:
producing at least one nitride-based heterostructure device, the producing comprising:
applying a nitride-based etch stop layer comprising Indium (In) above the partial nitride-based heterostructure;
generating at least one of a recessed contact, a facet, or a photonic crystal for the device, the generating including selectively etching at least one of: the cap layer or the etch stop layer; and
incorporating the nitride-based heterostructure device in the integrated circuit.
23. The method of claim 22, wherein the integrated circuit comprises a nitride-based Monolithic Microwave Integrated Circuit.
US11358303 2005-02-22 2006-02-21 Etching a nitride-based heterostructure Active 2026-07-28 US7429534B2 (en)
US65519305 true 2005-02-22 2005-02-22
US11358303 US7429534B2 (en) 2005-02-22 2006-02-21 Etching a nitride-based heterostructure
US20060186422A1 true true US20060186422A1 (en) 2006-08-24
US7429534B2 US7429534B2 (en) 2008-09-30
ID=36911748
US11358303 Active 2026-07-28 US7429534B2 (en) 2005-02-22 2006-02-21 Etching a nitride-based heterostructure
US (1) US7429534B2 (en)
US20090072240A1 (en) * 2007-09-14 2009-03-19 Transphorm Inc. III-Nitride Devices with Recessed Gates
WO2009132039A2 (en) * 2008-04-23 2009-10-29 Transphorm Inc. Enhancement mode iii-n hemts
US20110044364A1 (en) * 2009-08-19 2011-02-24 The Regents Of The University Of California STRUCTURE AND METHOD FOR ACHIEVING SELECTIVE ETCHING IN (Ga,Al,In,B)N LASER DIODES
US20110101371A1 (en) * 2005-01-06 2011-05-05 Power Integrations, Inc. Gallium nitride semiconductor
US20110121314A1 (en) * 2007-09-17 2011-05-26 Transphorm Inc. Enhancement mode gallium nitride power devices
US20110215339A1 (en) * 2007-03-20 2011-09-08 Power Integrations, Inc. Termination and contact structures for a high voltage GaN-based heterojunction transistor
US8237198B2 (en) 2008-12-10 2012-08-07 Transphorm Inc. Semiconductor heterostructure diodes
WO2013036593A1 (en) * 2011-09-06 2013-03-14 Sensor Electronic Technology, Inc. Semiconductor device with low-conducting field-controlling element
US8629525B2 (en) 2005-11-15 2014-01-14 Power Integrations, Inc. Second contact schottky metal layer to improve GaN schottky diode performance
US8633094B2 (en) 2011-12-01 2014-01-21 Power Integrations, Inc. GaN high voltage HFET with passivation plus gate dielectric multilayer structure
US8916929B2 (en) 2004-06-10 2014-12-23 Power Integrations, Inc. MOSFET having a JFET embedded as a body diode
US8928037B2 (en) 2013-02-28 2015-01-06 Power Integrations, Inc. Heterostructure power transistor with AlSiN passivation layer
US8940620B2 (en) 2011-12-15 2015-01-27 Power Integrations, Inc. Composite wafer for fabrication of semiconductor devices
US9142714B2 (en) 2008-10-09 2015-09-22 Nitek, Inc. High power ultraviolet light emitting diode with superlattice
US9171730B2 (en) 2013-02-15 2015-10-27 Transphorm Inc. Electrodes for semiconductor devices and methods of forming the same
JP2011082216A (en) 2009-10-02 2011-04-21 Fujitsu Ltd Compound semiconductor device and method for manufacturing the same
US20110241020A1 (en) * 2010-03-31 2011-10-06 Triquint Semiconductor, Inc. High electron mobility transistor with recessed barrier layer
KR101680767B1 (en) 2010-10-06 2016-11-30 삼성전자주식회사 Method of manufacturing High Electron Mobility Transistor having high power using impurity injection
JP5713109B2 (en) * 2011-08-01 2015-05-07 株式会社村田製作所 Field-effect transistor
US20130099277A1 (en) * 2011-10-25 2013-04-25 The Regents Of The University Of California SELECTIVE DRY ETCHING OF N-FACE (Al,In,Ga)N HETEROSTRUCTURES
KR20140045843A (en) 2012-10-09 2014-04-17 삼성전자주식회사 High electron mobility transistor and method of manufacturing the same
US5693180A (en) * 1995-04-25 1997-12-02 Sharp Kabushiki Kaisha Dry etching method for a gallium nitride type compound semiconductor
US20010020485A1 (en) * 1998-07-02 2001-09-13 Astropower Silicon thin-film, integrated solar cell,module, and methods of manufacturing the same
US6656802B2 (en) * 2000-02-04 2003-12-02 Koninklijke Philps Electronics N.V. Process of manufacturing a semiconductor device including a buried channel field effect transistor
US6741623B2 (en) * 2000-06-30 2004-05-25 Kabushiki Kaisha Toshiba Semiconductor device, semiconductor laser, their manufacturing methods and etching methods
US6764888B2 (en) * 2000-09-27 2004-07-20 Sensor Electronic Technology, Inc. Method of producing nitride-based heterostructure devices
US6838162B1 (en) * 1999-09-16 2005-01-04 Sgl Technik Gmbh Fiber-bundle-reinforced composite material having a ceramic matrix, method for manufacturing a composite material and method for manufacturing elements formed of a composite material
US20060054968A1 (en) * 2004-09-13 2006-03-16 Taiwan Semiconductor Manufacturing Company, Ltd. Thin channel MOSFET with source/drain stressors
US20060151787A1 (en) * 2005-01-12 2006-07-13 International Business Machines Corporation LOW CONCENTRATION SiGe BUFFER DURING STRAINED Si GROWTH OF SSGOI MATERIAL FOR DOPANT DIFFUSION CONTROL AND DEFECT REDUCTION
US8169003B2 (en) * 2007-03-20 2012-05-01 Power Integrations, Inc. Termination and contact structures for a high voltage GaN-based heterojunction transistor
US7795642B2 (en) 2007-09-14 2010-09-14 Transphorm, Inc. III-nitride devices with recessed gates
US7939391B2 (en) 2007-09-14 2011-05-10 Transphorm Inc. III-Nitride devices with recessed gates
WO2009036181A3 (en) * 2007-09-14 2009-05-07 Transphorm Inc Iii-nitride devices with recessed gates
WO2009036181A2 (en) * 2007-09-14 2009-03-19 Transphorm Inc. Iii-nitride devices with recessed gates
US8344424B2 (en) 2007-09-17 2013-01-01 Transphorm Inc. Enhancement mode gallium nitride power devices
US8193562B2 (en) 2007-09-17 2012-06-05 Tansphorm Inc. Enhancement mode gallium nitride power devices
US9343560B2 (en) 2007-09-17 2016-05-17 Transphorm Inc. Gallium nitride power devices
US8633518B2 (en) 2007-09-17 2014-01-21 Transphorm Inc. Gallium nitride power devices
WO2009132039A3 (en) * 2008-04-23 2010-02-25 Transphorm Inc. Enhancement mode iii-n hemts
US9437708B2 (en) 2008-04-23 2016-09-06 Transphorm Inc. Enhancement mode III-N HEMTs
US9196716B2 (en) 2008-04-23 2015-11-24 Transphorm Inc. Enhancement mode III-N HEMTs
US8841702B2 (en) 2008-04-23 2014-09-23 Transphorm Inc. Enhancement mode III-N HEMTs
US8541818B2 (en) 2008-12-10 2013-09-24 Transphorm Inc. Semiconductor heterostructure diodes
US9041065B2 (en) 2008-12-10 2015-05-26 Transphorm Inc. Semiconductor heterostructure diodes
US9293561B2 (en) 2009-05-14 2016-03-22 Transphorm Inc. High voltage III-nitride semiconductor devices
WO2011071568A3 (en) * 2009-08-19 2011-08-04 The Regents Of The University Of California STRUCTURE AND METHOD FOR ACHIEVING SELECTIVE ETCHING IN (Ga,A1,In,B)N LASER DIODES
US9831315B2 (en) 2009-08-28 2017-11-28 Transphorm Inc. Semiconductor devices with field plates
US8692294B2 (en) 2009-08-28 2014-04-08 Transphorm Inc. Semiconductor devices with field plates
US9373699B2 (en) 2009-08-28 2016-06-21 Transphorm Inc. Semiconductor devices with field plates
US9111961B2 (en) 2009-08-28 2015-08-18 Transphorm Inc. Semiconductor devices with field plates
US9496137B2 (en) 2009-12-10 2016-11-15 Transphorm Inc. Methods of forming reverse side engineered III-nitride devices
US9437707B2 (en) 2010-12-15 2016-09-06 Transphorm Inc. Transistors with isolation regions
US9147760B2 (en) 2010-12-15 2015-09-29 Transphorm Inc. Transistors with isolation regions
US8895421B2 (en) 2011-02-02 2014-11-25 Transphorm Inc. III-N device structures and methods
US9224671B2 (en) 2011-02-02 2015-12-29 Transphorm Inc. III-N device structures and methods
US9142659B2 (en) 2011-03-04 2015-09-22 Transphorm Inc. Electrode configurations for semiconductor devices
US8895423B2 (en) 2011-03-04 2014-11-25 Transphorm Inc. Method for making semiconductor diodes with low reverse bias currents
US9224805B2 (en) 2011-09-06 2015-12-29 Transphorm Inc. Semiconductor devices with guard rings
US9806184B2 (en) 2011-09-06 2017-10-31 Sensor Electronic Technology, Inc. Semiconductor device with low-conducting field-controlling element
US9171836B2 (en) 2011-10-07 2015-10-27 Transphorm Inc. Method of forming electronic components with increased reliability
US8860495B2 (en) 2011-10-07 2014-10-14 Transphorm Inc. Method of forming electronic components with increased reliability
US9685323B2 (en) 2012-02-03 2017-06-20 Transphorm Inc. Buffer layer structures suited for III-nitride devices with foreign substrates
US9634100B2 (en) 2012-06-27 2017-04-25 Transphorm Inc. Semiconductor devices with integrated hole collectors
US9520491B2 (en) 2013-02-15 2016-12-13 Transphorm Inc. Electrodes for semiconductor devices and methods of forming the same
US7429534B2 (en) 2008-09-30 grant
US7728356B2 (en) 2010-06-01 P-GaN/AlGaN/AlN/GaN enhancement-mode field effect transistor
US6878593B2 (en) 2005-04-12 Metal oxide semiconductor heterostructure field effect transistor
US20080203430A1 (en) 2008-08-28 Enhancement mode insulated gate heterostructure field-effect transistor
US20080128752A1 (en) 2008-06-05 GaN based HEMTs with buried field plates
US20080308813A1 (en) 2008-12-18 High breakdown enhancement mode gallium nitride based high electron mobility transistors with integrated slant field plate
US20080258243A1 (en) 2008-10-23 Field effect transistor
US20060220060A1 (en) 2006-10-05 Semiconductor device and manufacturing method thereof
US6867078B1 (en) 2005-03-15 Method for forming a microwave field effect transistor with high operating voltage
US20070007547A1 (en) 2007-01-11 III-Nitride enhancement mode devices
US7268375B2 (en) 2007-09-11 Inverted nitride-based semiconductor structure
US7812369B2 (en) 2010-10-12 Fabrication of single or multiple gate field plates
US8603880B2 (en) 2013-12-10 Semiconductor device including gate electrode provided over active region in P-type nitride semiconductor layer and method of manufacturing the same, and power supply apparatus
US20090146182A1 (en) 2009-06-11 Nitride semiconductor device and method for fabricating the same
JP2004214471A (en) 2004-07-29 Field effect transistor
US7863648B2 (en) 2011-01-04 Field effect transistor
US20110095337A1 (en) 2011-04-28 Semiconductor device and method of manufacturing the same
JP2007035905A (en) 2007-02-08 Nitride semiconductor element
JP2006339561A (en) 2006-12-14 Field-effect transistor and its manufacturing method
US20100127275A1 (en) 2010-05-27 Gan-based field effect transistor and method of manufacturing the same
JP2006279032A (en) 2006-10-12 Semiconductor device and manufacturing method thereof
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GASKA, REMIGIJUS;HU, XUHONG;FAREED, QHALID;AND OTHERS;REEL/FRAME:017350/0036