CN113013064A - Compound semiconductor wafer manufacturing process based on silicon-based carrier plate - Google Patents

Compound semiconductor wafer manufacturing process based on silicon-based carrier plate Download PDF

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Publication number
CN113013064A
CN113013064A CN202110212840.4A CN202110212840A CN113013064A CN 113013064 A CN113013064 A CN 113013064A CN 202110212840 A CN202110212840 A CN 202110212840A CN 113013064 A CN113013064 A CN 113013064A
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China
Prior art keywords
compound semiconductor
silicon
carrier plate
semiconductor substrate
based carrier
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CN202110212840.4A
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Chinese (zh)
Inventor
符德荣
严立巍
陈政勋
文锺
李景贤
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Shaoxing Tongxincheng Integrated Circuit Co ltd
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Shaoxing Tongxincheng Integrated Circuit Co ltd
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Priority to CN202110212840.4A priority Critical patent/CN113013064A/en
Publication of CN113013064A publication Critical patent/CN113013064A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/67005Apparatus not specifically provided for elsewhere
    • H01L21/67011Apparatus for manufacture or treatment
    • H01L21/67092Apparatus for mechanical treatment
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/67005Apparatus not specifically provided for elsewhere
    • H01L21/67011Apparatus for manufacture or treatment
    • H01L21/67132Apparatus for placing on an insulating substrate, e.g. tape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/6835Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2221/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
    • H01L2221/67Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
    • H01L2221/683Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L2221/68304Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • H01L2221/6835Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used as a support during build up manufacturing of active devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2221/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
    • H01L2221/67Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
    • H01L2221/683Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L2221/68304Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
    • H01L2221/68381Details of chemical or physical process used for separating the auxiliary support from a device or wafer
    • H01L2221/68386Separation by peeling

Abstract

The invention belongs to the field of semiconductor manufacturing, and discloses a compound semiconductor wafer manufacturing process based on a silicon-based carrier plate, which comprises the following steps: s1, permanently bonding the back surfaces of the compound semiconductor substrates on the silicon-based carrier plate; s2, completing the wafer process of the front surface of the compound semiconductor substrate; s3, temporarily bonding the glass carrier plate after the front surface of the compound semiconductor substrate is flattened; s4, turning over the glass carrier plate, removing the silicon-based carrier plate through grinding and etching, and finishing the thinning of the back of the compound semiconductor substrate; s5, completing the back wafer process of the compound semiconductor substrate; s6, removing the glass carrier plate by debonding, and removing the adhesive layer to complete the compound semiconductor element. The invention permanently bonds the small-size compound semiconductor substrate on the silicon-based carrier plate, realizes the mass production of compound semiconductor elements by using the existing production line of the major-size silicon wafer, can manufacture a plurality of compound semiconductor wafers at one time, and improves the production line benefit of the compound semiconductor wafers.

Description

Compound semiconductor wafer manufacturing process based on silicon-based carrier plate
Technical Field
The invention relates to the field of semiconductor manufacturing, in particular to a compound semiconductor wafer manufacturing process based on a silicon-based carrier plate.
Background
Semiconductor materials can be classified into elementary semiconductors such as semiconductors formed of silicon (Si), germanium (Ge), and the like, and compound semiconductors such as gallium arsenide (GaAs), gallium nitride (GaN), silicon carbide (SiC), and the like. While semiconductors have been mainly changed in the third generation in the past, gallium arsenide (GaAs), gallium nitride (GaN), and silicon carbide (SiC) semiconductors, which are representative of the second and third generation semiconductors, are much more excellent in high-frequency performance and high-temperature performance than the first generation semiconductors, and are more expensive to manufacture, and are therefore new and expensive in semiconductors.
The compound semiconductor can show excellent performance on ultrahigh voltage (8000V) IGBT and ultrahigh frequency (300 KHz) MOSFET elements, but the current mass production technology of the crystal growth material can only limit the substrate size to 6 inches and below 6 inches, and is incompatible with the 8 inch/12 inch process of the existing silicon chip. Because most of the processing processes are similar, if the sizes are consistent, a few processing devices special for the SiC or GaN process can be embedded into the production line of the 8-inch silicon wafer to implement mass production, and the benefit is much higher than that of the newly-established production line of the SiC or GaN with small sizes. Therefore, there is a need for a manufacturing process suitable for small compound semiconductor wafers to achieve mass production thereof.
Disclosure of Invention
In order to solve the above-mentioned drawbacks of the prior art, the present invention provides a process for manufacturing a compound semiconductor wafer based on a silicon-based carrier, wherein a small-sized compound semiconductor substrate is permanently bonded to the silicon-based carrier, after the previous process is completed, the front surface of the compound semiconductor substrate is temporarily bonded to a glass carrier, the silicon-based carrier is completely removed by grinding, the back surface of the compound semiconductor substrate is thinned, a stress damage layer is removed by wet etching, back metal evaporation and sputtering are performed, the compound semiconductor substrate and the glass carrier are finally debonded and bonded, and an adhesive is cleaned, thereby completing the manufacture of a compound semiconductor substrate device.
The purpose of the invention can be realized by the following technical scheme:
a compound semiconductor wafer manufacturing process based on a silicon-based carrier plate comprises the following steps:
s1, permanently bonding the back surfaces of the compound semiconductor substrates on the silicon-based carrier plate;
s2, completing the wafer process of the front surface of the compound semiconductor substrate;
s3, temporarily bonding the glass carrier plate after the front surface of the compound semiconductor substrate is flattened;
s4, turning over the glass carrier plate, removing the silicon-based carrier plate through grinding and etching, and finishing the thinning of the back of the compound semiconductor substrate;
s5, completing the back wafer process of the compound semiconductor substrate;
and S6, debonding by laser, UV or heat treatment, removing the glass carrier, and cleaning to remove the adhesive layer to obtain the compound semiconductor element.
Further preferably, the compound semiconductor substrate includes a gallium arsenide substrate, a gallium nitride substrate and a silicon carbide substrate, and when the compound semiconductor substrate is the silicon carbide substrate, the high temperature process is completed before the silicon-based carrier is permanently bonded in step S1.
Further preferably, the thickness of the compound semiconductor substrate and the silicon-based carrier after the compound semiconductor substrate and the silicon-based carrier are permanently bonded in step S1 is less than 1500 μm, and the diameter of the silicon-based carrier is larger than that of the compound semiconductor substrate.
Further preferably, the front wafer process in step S2 includes a photolithography process, an ILD process, an ion implantation process, a metal process and an etching process.
Further preferably, the back side wafer process in step S5 includes a photolithography process, an ion implantation process, and a metal process.
The invention has the beneficial effects that:
the process of the invention is characterized in that a small-size compound semiconductor substrate is permanently bonded on a silicon-based carrier plate, after the front-stage process is completed, the front surface of the compound semiconductor substrate is temporarily bonded on a glass carrier plate, the silicon-based carrier plate is completely removed by a grinding technology, the back surface of the compound semiconductor substrate is thinned, a stress damage layer is removed by a wet etching technology, back surface metal evaporation and sputtering are carried out, the compound semiconductor substrate and the glass carrier plate are bonded, and after an adhesive is cleaned, the manufacture of a plurality of small-size compound semiconductor substrates is completed. The process realizes the mass production of the compound semiconductor substrate element by utilizing the production line of the existing main size silicon wafer, can manufacture a plurality of compound semiconductor wafers at one time, and improves the production line benefit of the compound semiconductor wafers.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of a bonding structure of a silicon-based carrier and a small-sized compound semiconductor substrate according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at the location A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the molding in step S2 according to example 1 of the present invention;
FIG. 4 is a schematic view of the molding in step S3 according to example 1 of the present invention;
fig. 5 is a schematic diagram of the forming in step S4 in example 1 of the present invention.
In the figure:
1-8 inches of silicon-based carrier plate, 2-4 inches of compound semiconductor substrate, 3-3 inches of compound semiconductor substrate, 4-12 inches of silicon-based carrier plate, 5-6 inches of compound semiconductor substrate and 6-glass carrier plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Example 1
A compound semiconductor wafer manufacturing process based on a silicon-based carrier plate comprises the following steps:
s1, permanently bonding the silicon-based carrier plate on the back of the compound semiconductor substrate;
s2, completing the wafer process of the front surface of the compound semiconductor substrate;
s3, temporarily bonding the glass carrier plate after the front surface of the compound semiconductor substrate is flattened;
s4, turning over the glass carrier plate, removing the silicon-based carrier plate through grinding and etching, and finishing the thinning of the back of the compound semiconductor substrate;
s5, completing the back wafer process of the compound semiconductor substrate;
and S6, debonding by laser, UV or heat treatment, removing the glass carrier, and cleaning to remove the adhesive layer to obtain the compound semiconductor element.
The compound semiconductor substrate is a gallium nitride substrate.
The total thickness of the bonded wafer and the silicon-based carrier in the step S1 is 700 μm, wherein the thickness of the silicon-based carrier is 450 μm, the thickness of the compound semiconductor substrate is 250 μm, the thickness of the silicon-based carrier in the step S1 is 8-inch carrier, the number of the compound semiconductor substrates is four, and the four compound semiconductor substrates include two 3-inch substrates and two 4-inch substrates, and the four compound semiconductor substrates are horizontally arranged and bonded on the surface of the silicon-based carrier, as shown in fig. 1 (a).
The front wafer process of step S2 includes a photolithography process, an ILD process, an ion implantation process, a metal process, and an etching process.
The back wafer process of step S5 includes a photolithography process, an ion implantation process, and a metal process.
Example 2
A compound semiconductor wafer manufacturing process based on a silicon-based carrier plate comprises the following steps:
s1, permanently bonding the silicon-based carrier plate on the back of the compound semiconductor substrate;
s2, completing the wafer process of the front surface of the compound semiconductor substrate;
s3, temporarily bonding the glass carrier plate after the front surface of the compound semiconductor substrate is flattened;
s4, turning over the glass carrier plate, removing the silicon-based carrier plate through grinding and etching, and finishing the thinning of the back of the compound semiconductor substrate;
s5, completing the back wafer process of the compound semiconductor substrate;
and S6, debonding by laser, UV or heat treatment, removing the glass carrier, and cleaning to remove the adhesive layer to obtain the compound semiconductor element.
The compound semiconductor substrate is a silicon carbide substrate, and in step S1, a high temperature process is performed before bonding the silicon-based carrier.
The total thickness of the bonded wafer and the silicon-based carrier in the step S1 is 800 μm, wherein the thickness of the silicon-based carrier is 500 μm, the thickness of the compound semiconductor substrate is 300 μm, the silicon-based carrier in the step S1 is a 12-inch carrier, the number of the compound semiconductor substrates is four, and the four compound semiconductor substrates include two 4-inch substrates and two 6-inch substrates, and the four compound semiconductor substrates are horizontally arranged and bonded on the surface of the silicon-based carrier, as shown in fig. 1 (b).
The front wafer process of step S2 includes a photolithography process, an ILD process, an ion implantation process, a metal process, and an etching process.
The back wafer process of step S5 includes a photolithography process, an ion implantation process, and a metal process.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims (5)

1. A compound semiconductor wafer manufacturing process based on a silicon-based carrier plate is characterized by comprising the following steps:
s1, permanently bonding the back surfaces of the compound semiconductor substrates on the silicon-based carrier plate;
s2, completing the wafer process of the front surface of the compound semiconductor substrate;
s3, temporarily bonding the glass carrier plate after the front surface of the compound semiconductor substrate is flattened;
s4, turning over the glass carrier plate, removing the silicon-based carrier plate through grinding and etching, and finishing the thinning of the back of the compound semiconductor substrate;
s5, completing the back wafer process of the compound semiconductor substrate;
and S6, debonding by laser, UV or heat treatment, removing the glass carrier, and cleaning to remove the adhesive layer to obtain the compound semiconductor element.
2. The process of claim 1, wherein the compound semiconductor substrate comprises a GaAs substrate, a GaN substrate and a SiC substrate, and the compound semiconductor substrate is made by performing a high temperature process prior to the step of permanently bonding the Si-based carrier in step S1.
3. The process for manufacturing a compound semiconductor wafer based on a silicon-based carrier plate as claimed in claim 1, wherein the thickness of the compound semiconductor substrate and the silicon-based carrier plate after permanent bonding in step S1 is less than 1500 μm, and the diameter of the silicon-based carrier plate is larger than that of the compound semiconductor substrate.
4. The silicon-based carrier-based compound semiconductor wafer fabrication process of claim 1, wherein the front side wafer process of step S2 comprises a photolithography process, an ILD process, an ion implantation process, a metal process and an etching process.
5. The silicon-based carrier-based compound semiconductor wafer fabrication process of claim 1, wherein the backside wafer process of step S5 comprises a photolithography process, an ion implantation process and a metal process.
CN202110212840.4A 2021-02-23 2021-02-23 Compound semiconductor wafer manufacturing process based on silicon-based carrier plate Pending CN113013064A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05109592A (en) * 1991-06-20 1993-04-30 Fujitsu Ltd Wafer for compound semiconductor device and manufacture thereof
JPH1187200A (en) * 1997-09-05 1999-03-30 Toshiba Corp Semiconductor substrate and manufacture of semiconductor device
JP2000277405A (en) * 1999-03-29 2000-10-06 Meidensha Corp Method for producing semiconductor device
US20020123204A1 (en) * 2001-03-01 2002-09-05 Torvik John Tarje Method of making a hybrid substrate having a thin silicon carbide membrane layer
US20040007763A1 (en) * 2002-03-14 2004-01-15 Commonwealth Scientific And Industrial Research Organization Campbell, Australia Method and resulting structure for manufacturing semiconductor substrates
JP2007180273A (en) * 2005-12-28 2007-07-12 Toyota Central Res & Dev Lab Inc Method of manufacturing semiconductor device
US20100124798A1 (en) * 2008-11-18 2010-05-20 Samsung Electronics Co., Ltd. Method of manufacturing light emitting device
JP2011071196A (en) * 2009-09-24 2011-04-07 Sumitomo Electric Ind Ltd Method of manufacturing semiconductor substrate
CN105938794A (en) * 2015-03-06 2016-09-14 英飞凌科技奥地利有限公司 Method of manufacturing semiconductor devices, composite wafer and semiconductor device
WO2020181815A1 (en) * 2019-03-13 2020-09-17 电子科技大学 Preparation method for spliced small-sized single crystal thin film, single crystal thin film and resonator

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05109592A (en) * 1991-06-20 1993-04-30 Fujitsu Ltd Wafer for compound semiconductor device and manufacture thereof
JPH1187200A (en) * 1997-09-05 1999-03-30 Toshiba Corp Semiconductor substrate and manufacture of semiconductor device
JP2000277405A (en) * 1999-03-29 2000-10-06 Meidensha Corp Method for producing semiconductor device
US20020123204A1 (en) * 2001-03-01 2002-09-05 Torvik John Tarje Method of making a hybrid substrate having a thin silicon carbide membrane layer
US20040007763A1 (en) * 2002-03-14 2004-01-15 Commonwealth Scientific And Industrial Research Organization Campbell, Australia Method and resulting structure for manufacturing semiconductor substrates
JP2007180273A (en) * 2005-12-28 2007-07-12 Toyota Central Res & Dev Lab Inc Method of manufacturing semiconductor device
US20100124798A1 (en) * 2008-11-18 2010-05-20 Samsung Electronics Co., Ltd. Method of manufacturing light emitting device
JP2011071196A (en) * 2009-09-24 2011-04-07 Sumitomo Electric Ind Ltd Method of manufacturing semiconductor substrate
CN105938794A (en) * 2015-03-06 2016-09-14 英飞凌科技奥地利有限公司 Method of manufacturing semiconductor devices, composite wafer and semiconductor device
WO2020181815A1 (en) * 2019-03-13 2020-09-17 电子科技大学 Preparation method for spliced small-sized single crystal thin film, single crystal thin film and resonator

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