WO2022250343A1 - 실리콘이 코팅 된 구리 제조방법, 이를 이용한 실리콘이 코팅된 산화방지용 구리 및 이를 이용한 반도체 장치 - Google Patents
실리콘이 코팅 된 구리 제조방법, 이를 이용한 실리콘이 코팅된 산화방지용 구리 및 이를 이용한 반도체 장치 Download PDFInfo
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- WO2022250343A1 WO2022250343A1 PCT/KR2022/006804 KR2022006804W WO2022250343A1 WO 2022250343 A1 WO2022250343 A1 WO 2022250343A1 KR 2022006804 W KR2022006804 W KR 2022006804W WO 2022250343 A1 WO2022250343 A1 WO 2022250343A1
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 191
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 191
- 239000010703 silicon Substances 0.000 title claims abstract description 190
- 239000010949 copper Substances 0.000 title claims abstract description 184
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 147
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000004065 semiconductor Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003064 anti-oxidating effect Effects 0.000 title claims abstract 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 63
- 239000001301 oxygen Substances 0.000 claims abstract description 63
- 230000003647 oxidation Effects 0.000 claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 22
- 238000000151 deposition Methods 0.000 claims abstract description 15
- 238000004544 sputter deposition Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000010409 thin film Substances 0.000 claims description 31
- 239000013078 crystal Substances 0.000 claims description 22
- 239000010931 gold Substances 0.000 claims description 13
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 239000011888 foil Substances 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 239000012300 argon atmosphere Substances 0.000 claims description 3
- 238000002161 passivation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 81
- 239000011889 copper foil Substances 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 239000010408 film Substances 0.000 description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 230000008021 deposition Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910004028 SiCU Inorganic materials 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- XOJVVFBFDXDTEG-UHFFFAOYSA-N Norphytane Natural products CC(C)CCCC(C)CCCC(C)CCCC(C)C XOJVVFBFDXDTEG-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- WCCJDBZJUYKDBF-UHFFFAOYSA-N copper silicon Chemical group [Si].[Cu] WCCJDBZJUYKDBF-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
- C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0015—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterized by the colour of the layer
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
- C23C14/5806—Thermal treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45147—Copper (Cu) as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/45198—Material with a principal constituent of the material being a combination of two or more materials in the form of a matrix with a filler, i.e. being a hybrid material, e.g. segmented structures, foams
- H01L2224/45298—Fillers
- H01L2224/45399—Coating material
- H01L2224/454—Coating material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
Definitions
- the present invention relates to a method for manufacturing silicon-coated copper, silicon-coated copper for oxidation prevention using the same, and a semiconductor device using the same, and more particularly, by depositing silicon (Si) to form silicon (Si)-oxygen (O)- It relates to copper including a surface coated with silicon (Si) having resistance to oxidation while maintaining electrical properties as it is by forming a protective film of a copper (Cu) mixed layer.
- copper has high utilization value as a conductive material and is widely used. Such copper is used for thin films, foils or bulk structures. However, since copper has weak resistance to oxidation, it cannot be used when extreme reliability is required, when long-term use is required, or when it is used at high temperature.
- the present invention has been made to solve the above problems, and an object of the present invention is to prevent oxidation by forming a Si-O-Cu protective layer through deposition of Si, and at the same time, a copper thin film, foil or It is to provide a method for manufacturing a lump structure or the like.
- the present invention is characterized in that silicon (Si)-oxygen (O) and silicon (Si)-oxygen (O)-copper (Cu) mixed layers are formed by depositing silicon (Si) with silicon-coated copper for oxidation prevention. .
- the silicon-coated copper is characterized in that it has an electrical resistance value between gold (Au) and copper on which the silicon (Si) is not deposited.
- the silicon-coated copper has an electrical resistance of 1.68*10 -6 to 2.2*10 -6 ⁇ cm.
- a cyclox layer 20 formed by mixing silicon (Si) -oxygen (O) -copper (Cu) on top of the copper layer 10;
- Si silicon
- the silicon (Si) layer 40 is characterized in that the thickness is 3 to 20 nm.
- first silicon (Si) -oxygen (O) mixed layer 30 and the second silicon (Si) -oxygen (O) mixed layer 50 is characterized in that the thickness is 1 to 10 nm.
- the cox layer 20 is characterized in that the thickness is 0.8 to 1.2 nm.
- the present invention is a silicon-coated copper manufacturing method, characterized in that silicon (Si) is deposited on copper (Cu) in a single sputtering process.
- the sputtering is performed under an argon atmosphere.
- the sputtering (sputtering) is characterized in that it is carried out for 1 to 5 minutes at room temperature to 350 °C.
- the present invention relates to a semiconductor device, and is characterized by including copper provided with a cyclox layer 20, which is a silicon (Si)-oxygen (O)-copper (Cu) mixed layer by depositing silicon (Si).
- the cox layer 20 is characterized in that the thickness is 0.8 to 1.2 nm.
- the present invention has high manufacturing efficiency by producing copper free from oxidation only with silicon (Si) deposition, and can replace gold using copper (Cu) and silicon (Si), which are most abundant on earth. It has high economic value.
- the present invention can manufacture copper (Cu) having resistance to oxidation while maintaining electrical characteristics by forming a silicon (Si)-oxygen (O)-copper (Cu) protective film through silicon (Si) deposition.
- the present invention can manufacture antioxidant copper that can be used semi-permanently at room temperature while being very simple and inexpensive in the manufacturing method.
- the present invention can manufacture a circuit that is not oxidized despite heat generation when a pattern is produced and surface treated, so that fire and explosion due to heat generation can be prevented.
- RGB values R: 254, G: 220, B: 182
- RGB values R: 184, G: 115, B: 51
- FIG. 2 is a photograph of single crystal thin film copper coated with silicon (Si) heat-treated in air at 350 ° C. for 30 minutes after coating silicon (Si).
- Si 4 is an XRD measurement result of a single crystal copper thin film coated with silicon (Si), which confirms that the crystal structure is not changed at all even after heat treatment in air at 350 ° C. for 30 minutes, crystallization is better in one direction, and the surface is not oxidized.
- FIG. 6 is a photograph of a copper foil coated with silicon (Si) and surface-treated.
- 10 is an XRD measurement result of a copper foil subjected to surface treatment by coating with silicon (Si) and then heat-treated in air at 250° C. for 30 minutes.
- 11 is a graph showing changes in electrical resistance depending on the heat treatment temperature and silicon (Si) coating thickness of SiCu/Al 2 O 3 samples.
- 16 is a diagram showing the expected distribution of O (pink and red) and Si (yellow) on a copper thin film (from green to bottom), (a) side view and (b) plan view.
- the present invention relates to a silicon-coated copper manufacturing method, wherein silicon is deposited to form a silicon (Si)-oxygen (O)-copper (Cu) mixed layer.
- the silicon is coated by depositing silicon on the copper surface in a single sputtering process.
- the sputtering is performed under an argon atmosphere, and is preferably performed at room temperature to 350° C. for 1 to 5 minutes.
- the sputtering is performed, if the temperature and time range are higher or lower than the crystallinity due to the formation of grain boundaries and dislocations, it is preferable to perform the sputtering within the above temperature range. In the embodiment of the present invention, it was performed at 190 ° C. for 75 seconds, 150 seconds and 300 seconds.
- the silicon-coated copper produced by the silicon-coated copper manufacturing method is characterized in that the cox layer 20, which is a silicon (Si)-oxygen (O)-copper (Cu) mixed layer, is formed by depositing silicon do.
- the cox layer 20 which is a silicon (Si)-oxygen (O)-copper (Cu) mixed layer, is formed by depositing silicon do.
- the silicon-coated copper of the present invention is characterized by RGB values of 250 to 260 (red), 210 to 220 (green), and 155 to 165 (blue), respectively.
- 1 is a photograph of a single crystal copper thin film (SCCF) having a thickness of 185 nm
- FIG. 2 is a photograph of copper coated with silicon and then subjected to heat treatment in air at 350 ° C. for 30 minutes.
- the single crystal thin film copper of FIG. 1 showed RGB values of 254 (red), 220 (green) and 182 (blue), and the copper heat-treated in air after silicon coating of FIG. Values of 255 (red), 216 (green) and 159 (blue) were observed.
- the silicon-coated copper prepared by the present invention is prevented from oxidation, and at 350 ° C. It can be seen that even though the heat treatment was performed for 30 minutes, oxidation was prevented by remaining similar to the single crystal thin film copper.
- FIG. 5 to 8 show a comparison of photographs of copper foil before and after heat treatment in air and copper foil coated with silicon.
- FIG. 7 When comparing the copper foil of FIG. 5 by heat treatment at 250° C. for 30 minutes (FIG. 7), it can be seen that the general copper foil has turned dark.
- FIG. 8 when comparing the silicon-coated copper foil of FIG. 6 by heat treatment at 250 ° C. for 30 minutes (FIG. 8) under the same conditions, the silicon-coated copper foil retains its original color. can confirm that
- 3 and 4 show XRD measurement results of a single crystal thin copper thin film (SCCF) and a single crystal copper thin film coated with silicon and then heat-treated. As shown in FIG. 4, it can be predicted that the crystal structure is not changed at all even after coating with silicon and heat treatment at 350 ° C. in air for 30 minutes, rather, crystallization is better in one direction and the surface is not oxidized.
- SCCF single crystal thin copper thin film
- FIG. 9 to 10 show XRD measurement results of a copper foil after heat treatment in air and a copper foil coated with silicon.
- FIG. 10 When comparing the copper foil of FIG. 9 by heat treatment in air at 250 °C for 30 minutes (FIG. 10), the copper foil shows the Cu 2 O phase in FIG. 9, but the copper foil coated with silicon As confirmed in FIG. 10, it can be seen that the foil maintains the original copper structure.
- the silicon-coated copper of the present invention has a resistance value of 1.68*10 -6 ⁇ cm and a resistance value of 2.2*10 of bulk Au. It is characterized by having a resistance value between -6 ⁇ cm.
- the silicon-coated copper of the present invention maintains a similar electrical resistance to that of copper on which the silicon is not deposited.
- the silicon-coated copper of the present invention is prevented from being oxidized even when heated at 200 ° C. for 60 hours.
- Zone 11 shows the change in resistance depending on the heat treatment temperature and silicon coating thickness of the SiCu/Al 2 O 3 sample.
- Zone A is the resistance change due to heat treatment of a single crystal thin copper thin film (SCCF) sample having a thickness of 185 nm
- zone B is a silicon-coated single crystal thin copper thin film (SCCF) sample (Si SCCF) and its resistance change after heat treatment.
- Zone C is the resistance change of a single crystal thin film copper film (SCCF) sample coated with silicon thicker than 5 nm.
- Zone D shows the resistance of bulk copper (bulk Cu) and bulk gold (bulk Au) and compares it with zones B and C.
- the pure SCCF (pristine) sample has a resistance value of 1.68*10 -6 ⁇ cm, which is the resistance value of bulk Cu, and a resistance value of 2.2*10, which is the resistance value of bulk Au. It shows a resistance value smaller than -6 ⁇ cm.
- SCCF single crystal thin film copper thin film
- zone B the sample (Si5SCCF) in which 5 nm of silicon is coated on the 185 nm single crystal thin film copper film (SCCF) has a resistance value almost similar to that of bulk Cu even when heat treated at 400 ° C for 30 minutes.
- zone C a change in resistance as the thickness of the silicon layer becomes thicker can be confirmed.
- the single crystal thin film copper film (SCCF) coated with silicon has a value between the resistance of bulk Cu and bulk gold, and only when the thickness of silicon reaches 30 nm It can be seen that the resistance becomes similar to that of bulk Au.
- the silicon-coated copper can be made into a single crystal thin film, polycrystalline thin film, foil or lump. As confirmed in FIG. 11, when the silicon-coated copper is a single crystal thin film, oxidation is prevented even when heat is applied at 400° C. for 30 minutes. When the silicon-coated copper is a polycrystalline thin film, foil, or lump, oxidation is prevented even when heat is applied at 300° C. for 30 minutes.
- the silicon-coated copper manufactured by the silicon-coated copper manufacturing method has a copper layer 10 and silicon (Si)-oxygen (O)-copper on top of the copper layer 10.
- a cyclox layer 20 formed by mixing (Cu), a first silicon (Si)-oxygen (O) mixed layer 30 formed on top of the cyclox layer 20, and the first silicon (Si)-oxygen ( O) It consists of a silicon (Si) layer 40 formed on top of the mixed layer 30 and a second silicon (Si)-oxygen (O) mixed layer 50 formed on top of the silicon (Si) layer 40.
- the mixed layer 50 is characterized in that the thickness is 5 to 30 nm. If the silicon (Si) coated layer is thinner than 5 nm, it is easily oxidized, and if it is thicker than 30 nm, problems such as insulation or poor electrical conductivity occur, so the above conditions are preferable.
- the silicon (Si) layer 40 is characterized in that the thickness is 3 to 20 nm.
- the first silicon (Si) -oxygen (O) mixed layer 30 and the second silicon (Si) -oxygen (O) mixed layer 50 are characterized in that the thickness is 1 to 10 nm.
- the cox layer 20 is characterized in that the thickness is 0.8 to 1.2 nm.
- FIG. 13 shows the change in the distance between copper atoms according to the depth observed by high-resolution TEM. As shown in FIG. 13, it can be seen that the distance between copper (Cu)-copper (Cu) is reduced on the surface, which confirms the presence of a mixed layer of silicon (Si) and copper (Cu) on the surface, and FIG. 14 The presence of a silicon (Si) and copper (Cu) mixed layer can be confirmed again in the XPS analysis of .
- a silicon (Si)-oxygen (O)-copper (Cu) mixed layer (Cyclox layer 20, SiCuO x ), a silicon (Si)-oxygen (O) mixed layer (SiO X ) and silicon (Si) It can be confirmed that it is configured in the form of a layer 40.
- 15 shows the surface structure (TEM) of the surface of a silicon-coated SCCF (Si10SCCF) sample, which can more accurately confirm the surface morphology of silicon-coated copper.
- 15(b) shows the TEM component analysis results, as seen in the TEM of FIG. 12 and the XPS measurement results of FIG.
- SiO X silicon-oxygen-copper
- FIG. 15 (a) shows that the thin film surface is formed in order, and the formed silicon (Si)-oxygen (O) mixed layer (SiO X ) is not visible in the image of FIG. 15 (a) because it has an amorphous structure.
- the silicon atoms directly on the copper film anchor the free-moving oxygen to optimal sites on the copper surface.
- silicon serves to fix these oxygens.
- the thickness of the silicon (Si) layer 40 is not very important in preventing oxidation, and the most important structure is determined by 1-2 layers of atoms directly on the copper thin film.
- Figure 16 shows the expected distribution of the oxygen (O) and silicon (Si) in the cox layer 20 on the copper thin film
- Figure 16 (a) is the oxygen (O) and silicon on the copper thin film (Si) is a side view of forming the cox layer 20
- 16 (b) is a plan view.
- the silicon (Si) is expected to play a role of fixing on the copper surface by combining with oxygen (O) of the copper surface, and at this time, the most basic structure is configured as shown in FIG. 16 .
- the oxygen (O) covers the copper surface and then is fixed by silicon (Si)
- other oxygen (O) is prevented from entering the inside of the copper. expected to play a role.
- the present invention can manufacture a semiconductor device including silicon-coated copper manufactured by the silicon-coated copper manufacturing method.
- the semiconductor device is characterized in that it includes copper in which a silicon (Si)-oxygen (O)-copper (Cu) mixed layer is formed by depositing silicon (Si).
- the semiconductor device includes the same configuration as the silicon-coated copper.
- the semiconductor device is connected to semiconductor chip pads and terminals, and a silicon (Si)-oxygen (O)-copper (Cu) mixed layer of the present invention is formed on the surface to contain copper to prevent oxidation, so that gold is used.
- Si silicon-oxygen
- Cu copper
- It has less electrical resistance and robustness than the case, is inexpensive, and has an effect of being able to use it for a long time because its lifespan is increased even at high ambient temperatures.
- it has an effect of improving electrical properties and increasing strength due to oxidation inhibition.
- the first silicon (Si) -oxygen (O) mixed layer 30, the silicon (Si) layer 40, and the second silicon (Si) -oxygen (O) mixed layer 50 may include silicon ( Si) is a coated layer, characterized in that it has a thickness of 5 to 30 nm. If the silicon (Si) coated layer is thinner than 5 nm, it is easily oxidized, and if it is thicker than 30 nm, problems such as insulation or poor electrical conductivity occur, so the above conditions are preferable.
- the thickness of the cox layer 20 is characterized in that 0.8 to 1.2 nm.
- the present invention has high manufacturing efficiency by producing copper free from oxidation only with silicon (Si) deposition, and can replace gold using copper (Cu) and silicon (Si), which are most abundant on earth. It has high economic value.
- the present invention can manufacture copper (Cu) having resistance to oxidation while maintaining electrical properties by forming a silicon (Si)-oxygen (O)-copper (Cu) mixed layer through silicon (Si) deposition.
- the present invention corresponds to a material that lasts the longest at high temperature, is very simple in manufacturing method and is inexpensive, and corresponds to antioxidant copper that is semi-permanent at room temperature.
- the present invention can manufacture a circuit that is not oxidized despite heat generation when a pattern is manufactured and surface treated, so that fire and explosion due to heat generation can be prevented and current density can be greatly improved, which is also suitable for semiconductor processes. It can lead to very large directions.
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Abstract
Description
Claims (16)
- 실리콘(Si)을 증착시켜 실리콘(Si)-산소(O)-구리(Cu) 혼합층인 사이콕스층(20)이 형성된 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 1항에 있어서,상기 실리콘이 코팅 된 구리는,상기 실리콘(Si)이 증착되지 않은 구리 및 금(Au) 사이의 전기저항을 가지는 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 1항에 있어서,상기 실리콘이 코팅 된 구리는,단결정 박막, 다결정 박막, 호일 또는 덩어리 인 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 3항에 있어서,상기 실리콘이 코팅 된 구리가 단결정 박막인 경우,400 ℃로 30 분 동안 열을 가하여도 산화가 방지되는 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 3항에 있어서,상기 실리콘이 코팅 된 구리가 다결정 박막, 호일 또는 덩어리인 경우,300 ℃로 열을 가하여도 산화가 방지되는 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 1항에 있어서,상기 실리콘이 코팅 된 구리는,200 ℃로 60 시간 동안 열을 가하여도 산화가 방지되는 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 1항에 있어서,상기 실리콘이 코팅 된 구리는,전기 저항이 1.68*10-6 내지 2.2*10-6 Ω·cm 인 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 1항에 있어서,상기 실리콘이 코팅 된 구리는,구리층(10);상기 구리층(10) 상단에 실리콘(Si)-산소(O)-구리(Cu)가 혼합되어 형성된 사이콕스층(20);상기 사이콕스층(20) 상단에 형성된 제 1 실리콘(Si)-산소(O) 혼합층(30);제 1 실리콘(Si)-산소(O) 혼합층(30) 상단에 형성된 실리콘(Si)층(40); 및상기 실리콘(Si)층(40) 상단에 형성된 제 2 실리콘(Si)-산소(O) 혼합층(50);으로 구성되는 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 8항에 있어서,상기 제 1 실리콘(Si)-산소(O) 혼합층(30), 실리콘(Si)층(40) 및 제 2 실리콘(Si)-산소(O) 혼합층(50)은,두께가 5 내지 30 ㎚ 인 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 8항에 있어서,상기 제 1 실리콘(Si)-산소(O) 혼합층(30) 및 제 2 실리콘(Si)-산소(O) 혼합층(50)은,두께가 1 내지 10 ㎚ 인 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 제 8항에 있어서,상기 사이콕스층(20)은,두께가 0.8 내지 1.2 ㎚ 인 것을 특징으로 하는 실리콘이 코팅된 산화방지용 구리.
- 구리(Cu)에 실리콘(Si)을 스퍼터링(sputtering) 단일 공정으로 증착시킨 것을 특징으로 하는 실리콘이 코팅 된 구리 제조방법.
- 제 12항에 있어서,상기 스퍼터링(sputtering)은,아르곤 분위기 하에서 수행하는 것을 특징으로 하는 실리콘이 코팅 된 구리 제조방법.
- 제 12항에 있어서,상기 스퍼터링(sputtering)은,상온 내지 350 ℃에서 1 내지 5 분 동안 수행하는 것을 특징으로 하는 실리콘이 코팅 된 구리 제조방법.
- 실리콘(Si)을 증착시켜 실리콘(Si)-산소(O)-구리(Cu) 혼합층인 사이콕스층(20)이 마련된 구리를 포함하는 것을 특징으로 하는 반도체 장치.
- 제 15항에 있어서,상기 사이콕스층(20)은,두께가 0.8 내지 1.2 ㎚ 인 것을 특징으로 하는 반도체 장치.
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EP22811536.6A EP4350026A1 (en) | 2021-05-28 | 2022-05-12 | Method for manufacturing silicon-coated copper, silicon-coated anti-oxidation copper using same, and semiconductor device using same |
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