KR20130048440A - Apparatus and method for deposition - Google Patents
Apparatus and method for deposition Download PDFInfo
- Publication number
- KR20130048440A KR20130048440A KR1020110113290A KR20110113290A KR20130048440A KR 20130048440 A KR20130048440 A KR 20130048440A KR 1020110113290 A KR1020110113290 A KR 1020110113290A KR 20110113290 A KR20110113290 A KR 20110113290A KR 20130048440 A KR20130048440 A KR 20130048440A
- Authority
- KR
- South Korea
- Prior art keywords
- susceptor
- source gas
- heating member
- heating
- reaction gas
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/458—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for supporting substrates in the reaction chamber
- C23C16/4582—Rigid and flat substrates, e.g. plates or discs
- C23C16/4583—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially horizontally
- C23C16/4586—Elements in the interior of the support, e.g. electrodes, heating or cooling devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus 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
- H01L21/683—Apparatus 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
- H01L21/687—Apparatus 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 mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus 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 mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
Abstract
Deposition apparatus according to the embodiment, the chamber; A susceptor accommodated in the chamber to receive a substrate; A source gas line connected to the susceptor and introducing a source gas into the susceptor to form a thin film on the substrate; A first heating member for heating the source gas line; And a second heating member for heating the source gas and the susceptor.
Deposition method according to the embodiment, the step of heating the reaction gas inside the source gas line; Heating the reaction gas inside a susceptor; And reacting the reaction gas with a substrate.
Description
Embodiments relate to deposition apparatus and deposition methods.
In general, chemical vapor deposition (CVD) is widely used as a technique for forming various thin films on a substrate or a wafer. The chemical vapor deposition method is a deposition technique involving a chemical reaction, which uses a chemical reaction of a source material to form a semiconductor thin film, an insulating film, and the like on the wafer surface.
Such chemical vapor deposition methods and deposition apparatuses have recently attracted attention as a very important technology among thin film formation technologies due to miniaturization of semiconductor devices, development of high efficiency, high power LEDs, and the like. It is currently used to deposit various thin films such as silicon films, oxide films, silicon nitride films or silicon oxynitride films, tungsten films and the like on a wafer.
In order to grow the silicon carbide epitaxial layer on the wafer or the substrate through the chemical vapor deposition method, the reaction gas is supplied into the susceptor and deposited on the wafer.
In this case, a large amount of reactant gas and a carrier gas are supplied to the source gas line that introduces the reaction gas into the susceptor, and flows into the susceptor through the line at a high speed.
However, since the reaction gas or carrier gas is supplied at room temperature, and ionization occurs at a limited heating site near the susceptor, there is a problem that the amount of reaction gas is ionized and the reaction gas that is undecomposed increases. Accordingly, there is a problem in that the efficiency of epi growth is lowered.
Accordingly, there is a need for a deposition apparatus and a deposition method capable of ionizing a reaction gas even near the source gas line.
Embodiments provide a deposition apparatus and a deposition method capable of increasing the amount of reaction gas to be ionized.
Deposition apparatus according to the embodiment, the chamber; A susceptor accommodated in the chamber to receive a substrate; A source gas line connected to the susceptor and introducing a source gas into the susceptor to form a thin film on the substrate; A first heating member for heating the source gas line; And a second heating member for heating the source gas and the susceptor.
Deposition method according to the embodiment, the step of heating the reaction gas inside the source gas line; Heating the reaction gas inside a susceptor; And reacting the reaction gas with a substrate.
The deposition apparatus and the deposition method according to the embodiment preheat the reaction gas outside the susceptor by a predetermined temperature or more before heating the reaction gas inside the susceptor. That is, the deposition apparatus may preheat the reaction gas or the carrier gas passing through the source gas line at a temperature similar to the reaction temperature by the heating member surrounding the source gas line.
Accordingly, by reducing the temperature difference between the reaction gas or the carrier gas flowing in the source gas line and the susceptor, it is possible to prevent a sudden temperature decrease and temperature unevenness in the susceptor.
Accordingly, the deposition apparatus and the deposition method according to the embodiment can produce a silicon carbide wafer of high efficiency and a silicon carbide epitaxial wafer process.
1 is a schematic view showing a silicon carbide epitaxial growth apparatus according to an embodiment.
2 is an exploded perspective view showing a deposition unit.
3 is a perspective view illustrating a deposition unit.
4 is a cross-sectional view illustrating the deposition unit according to the first embodiment, cut along the line AA ′ in FIG. 3.
FIG. 5 is a cross-sectional view illustrating a deposition unit in accordance with a second embodiment cut along the line AA ′ in FIG. 3.
6 shows a process flow of silicon carbide epilayer growth.
In the description of embodiments, each layer, region, pattern, or structure may be “on” or “under” the substrate, each layer, region, pad, or pattern. Substrate formed in ”includes all formed directly or through another layer. Criteria for the top / bottom or bottom / bottom of each layer will be described with reference to the drawings.
The thickness or the size of each layer (film), region, pattern or structure in the drawings may be modified for clarity and convenience of explanation, and thus does not entirely reflect the actual size.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a schematic diagram showing an example of a silicon carbide epitaxial layer growth apparatus according to an embodiment.
Referring to FIG. 1, the silicon carbide growth apparatus according to the embodiment includes a carrier
The carrier
The reaction
An end of the
The
The reaction
The reaction
In the above embodiment, methyltrichlorosilane (MTS), which is a liquid material, has been described as an example of a material for forming the reaction gas. However, the reaction gas may be formed using a gaseous material in addition to the liquid material. Of course.
That is, although not shown in the drawings, as an example, the silane compound, hydrogen chloride (HCl) and propane (C 3 H 8 ) in the chamber of the deposition unit may be supplied to the deposition unit through a direct supply line.
The
The
2 to 5, the
The
In addition, both ends of the
In addition, a heat insulating part may be further provided in the
In addition, a
The
As illustrated in FIGS. 2 to 5, the
The
However, since the embodiment is not limited thereto, a space for the gas passage may be made in the
The
The
The reaction gas supplied to the
As shown in FIGS. 2-5, the
The
The
The
The
The
The
As shown in FIGS. 4 and 5, the
The
The
The reaction gas or carrier gas flowing through the
That is, the reaction gas is first ionized in the
Accordingly, the source gas is decomposed into radicals and injected into the wafer W by the
As described above, the silicon carbide epitaxial growth apparatus according to the embodiment forms a thin film, such as the epitaxial layer, on a substrate such as the wafer (W). That is, the silicon carbide epitaxial growth apparatus according to the embodiment may be a deposition apparatus.
In the related art, since the reaction gas flowing through the source gas line is heated only in the portion of the source gas line introduced into the susceptor and pyrolysis occurs, the amount of the reaction gas passing through the ion gas without ionization is large, thus making it difficult to efficiently grow epi. There was this.
However, the deposition apparatus according to the embodiment first ionizes the reaction gas in the
The
Hereinafter, a deposition method according to an embodiment will be described with reference to FIG. 6. For the purpose of clarity and simplicity, detailed description of parts identical or similar to those described above will be omitted.
Referring to FIG. 6, the deposition method according to the embodiment may include preheating the reaction gas (ST10), heating the reaction gas (ST20), and reacting (ST30).
In the step of preheating the reaction gas (ST10), the reaction flowing through the source gas line by the
That is, the
Subsequently, in the step ST20 of heating the reaction gas, the reaction gas may be introduced into the susceptor, and heated by the
Subsequently, in the reacting step ST30, reaction radicals decomposed into radicals may be injected onto the wafer and react to form a silicon carbide epitaxial layer on the wafer (W).
Conventionally, since the reaction gas or carrier gases are supplied at room temperature, and ionization of the reaction gas occurs at a limited heating portion near the susceptor, the amount of reaction gas is less ionized and there is a problem that an undecomposed reaction gas increases. . Accordingly, there is a problem in that the efficiency of epi growth is lowered.
On the other hand, the deposition method according to the embodiment may be ionized primarily before the reaction gas is introduced into the susceptor by the
Accordingly, the deposition method according to the embodiment can reduce the amount of unreacted gas, thereby increasing the efficiency of the silicon carbide epitaxial wafer process, and enables the production of high quality silicon carbide epitaxial wafers.
The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. In addition, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.
Claims (9)
A susceptor accommodated in the chamber to receive a substrate;
A source gas line connected to the susceptor and introducing a source gas into the susceptor to form a thin film on the substrate;
A first heating member for heating the source gas line; And
And a second heating member for heating the source gas line and the susceptor.
The susceptor comprises silicon carbide (SiC) or graphite (C),
And the first heating member comprises silicon carbide (SiC) or graphite (C).
And the first heating member is located inside a susceptor and surrounds an outer surface of the source gas line.
And a temperature of the source gas line heated by the first heating member and the second heating member is 1300 ° C to 1500 ° C.
The chamber includes a second heating member surrounding the outer circumferential surface of the chamber,
And the second heating member positioned outside the first heating member and the susceptor overlap each other.
A source gas supply unit supplying the source gas to the source gas line,
And the source gas supply portion contains a compound of silicon and carbon.
Heating the reaction gas inside a susceptor; And
And reacting the reactant gas with a substrate.
The heating of the reaction gas inside the source gas line may be performed by a first heating member including silicon carbide (SiC) or graphite (C) and a second heating member including an induction coil,
And heating the reaction gas inside the susceptor is heated by a second heating member comprising an induction coil.
The heating of the reaction gas inside the source gas line may include heating the reaction gas at a temperature of 1300 ° C to 1500 ° C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020110113290A KR20130048440A (en) | 2011-11-02 | 2011-11-02 | Apparatus and method for deposition |
Applications Claiming Priority (1)
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KR1020110113290A KR20130048440A (en) | 2011-11-02 | 2011-11-02 | Apparatus and method for deposition |
Publications (1)
Publication Number | Publication Date |
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KR20130048440A true KR20130048440A (en) | 2013-05-10 |
Family
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Family Applications (1)
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KR1020110113290A KR20130048440A (en) | 2011-11-02 | 2011-11-02 | Apparatus and method for deposition |
Country Status (1)
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KR (1) | KR20130048440A (en) |
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2011
- 2011-11-02 KR KR1020110113290A patent/KR20130048440A/en not_active Application Discontinuation
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