WO2015089952A1 - 制备准soi源漏多栅器件的方法 - Google Patents
制备准soi源漏多栅器件的方法 Download PDFInfo
- Publication number
- WO2015089952A1 WO2015089952A1 PCT/CN2014/074361 CN2014074361W WO2015089952A1 WO 2015089952 A1 WO2015089952 A1 WO 2015089952A1 CN 2014074361 W CN2014074361 W CN 2014074361W WO 2015089952 A1 WO2015089952 A1 WO 2015089952A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gate
- layer
- drain
- source
- etching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/023—Manufacture or treatment of FETs having insulated gates [IGFET] having multiple independently-addressable gate electrodes influencing the same channel
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/024—Manufacture or treatment of FETs having insulated gates [IGFET] of fin field-effect transistors [FinFET]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/62—Fin field-effect transistors [FinFET]
- H10D30/6211—Fin field-effect transistors [FinFET] having fin-shaped semiconductor bodies integral with the bulk semiconductor substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/113—Isolations within a component, i.e. internal isolations
- H10D62/115—Dielectric isolations, e.g. air gaps
- H10D62/116—Dielectric isolations, e.g. air gaps adjoining the input or output regions of field-effect devices, e.g. adjoining source or drain regions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/013—Manufacture or treatment of electrodes having a conductor capacitively coupled to a semiconductor by an insulator
- H10D64/01302—Manufacture or treatment of electrodes having a conductor capacitively coupled to a semiconductor by an insulator the insulator being formed after the semiconductor body, the semiconductor being silicon
- H10D64/01332—Making the insulator
- H10D64/01336—Making the insulator on single crystalline silicon, e.g. chemical oxidation using a liquid
- H10D64/0134—Making the insulator on single crystalline silicon, e.g. chemical oxidation using a liquid with a treatment, e.g. annealing, after the formation of the insulator and before the formation of the conductor
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/013—Manufacture or treatment of electrodes having a conductor capacitively coupled to a semiconductor by an insulator
- H10D64/01358—Manufacture or treatment of electrodes having a conductor capacitively coupled to a semiconductor by an insulator the insulator being formed after the semiconductor body, the semiconductor being a Group III-V material
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/017—Manufacture or treatment using dummy gates in processes wherein at least parts of the final gates are self-aligned to the dummy gates, i.e. replacement gate processes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/013—Manufacturing their source or drain regions, e.g. silicided source or drain regions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/0165—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including complementary IGFETs, e.g. CMOS devices
- H10D84/017—Manufacturing their source or drain regions, e.g. silicided source or drain regions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/02—Manufacture or treatment characterised by using material-based technologies
- H10D84/03—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology
- H10D84/038—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology using silicon technology, e.g. SiGe
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/011—Manufacture or treatment comprising FinFETs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/24—Dry etching; Plasma etching; Reactive-ion etching of semiconductor materials
- H10P50/242—Dry etching; Plasma etching; Reactive-ion etching of semiconductor materials of Group IV materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/28—Dry etching; Plasma etching; Reactive-ion etching of insulating materials
- H10P50/282—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of inorganic materials
- H10P50/283—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of inorganic materials by chemical means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P95/00—Generic processes or apparatus for manufacture or treatments not covered by the other groups of this subclass
- H10P95/06—Planarisation of inorganic insulating materials
- H10P95/062—Planarisation of inorganic insulating materials involving a dielectric removal step
- H10P95/064—Planarisation of inorganic insulating materials involving a dielectric removal step the removal being chemical etching
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
- H10W10/01—Manufacture or treatment
- H10W10/011—Manufacture or treatment of isolation regions comprising dielectric materials
- H10W10/014—Manufacture or treatment of isolation regions comprising dielectric materials using trench refilling with dielectric materials, e.g. shallow trench isolations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
- H10W10/10—Isolation regions comprising dielectric materials
- H10W10/17—Isolation regions comprising dielectric materials formed using trench refilling with dielectric materials, e.g. shallow trench isolations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
- H10W10/01—Manufacture or treatment
- H10W10/011—Manufacture or treatment of isolation regions comprising dielectric materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W10/00—Isolation regions in semiconductor bodies between components of integrated devices
- H10W10/10—Isolation regions comprising dielectric materials
Definitions
- the present invention relates to a method of fabricating a quasi-SOI source-drain multi-gate device, and is a field of ultra-large scale integrated circuit fabrication technology. Background technique
- the existing quasi-SOI source-drain multi-gate structure device preparation process generally forms a quasi-SOI isolation layer by thermal oxidation, has a high thermal budget, and cannot be well applied to large-scale integrated manufacturing; Restricted on silicon substrate materials, it is not well extended to high mobility semiconductor substrates such as germanium or tri-five materials.
- the method for preparing a quasi-SOI source-drain multi-gate device provided by the invention simultaneously solves the above two problems, the preparation process has better compatibility and expandability, and further, the multi-gate structure has good grid control performance. Compared with the existing planar quasi-SOI source and drain device fabrication process, it has smaller leakage current and lower power consumption. Summary of the invention
- the present invention provides a method for preparing a quasi-SOI source-drain multi-gate device, which has better compatibility and expandability, and further has a multi-gate structure with good gate control performance.
- the method for preparing a quasi-SOI source-drain multi-gate device sequentially includes the following steps:
- the STI backfill material being an insulating medium, forming an STI isolation layer by chemical vapor deposition (CVD), chemical mechanical polishing (CMP), and etching, the first semiconductor substrate
- CVD chemical vapor deposition
- CMP chemical mechanical polishing
- etching the first semiconductor substrate
- the height of the Fin strip is HI;
- a gate dielectric layer and a gate material layer on the substrate sequentially depositing a gate dielectric layer and a gate material layer on the substrate, and forming a gate stacked structure by photolithography and etching using a front gate process or a back gate process, wherein the gate stack structure formed by the front gate process is a true gate
- the gate stack structure formed by the back gate process is a dummy gate
- the recessed source/drain structure is a U-shaped recess source/drain structure, a sag-type recess source/drain structure or an S-type recess source/drain structure; 6) depositing a quasi-SOI source-drain isolation layer by CVD, and then The quasi-SOI source-drain isolation layer is planarized by CMP, stopped on the gate material layer, and then etched back by etching or isotropic wet etching back drifting the quasi-SOI source-drain isolation layer, in the recessed source-drain structure Forming a quasi-SOI source/drain isolation layer having a thickness of H5, wherein a material of the quasi-SOI source/drain isolation layer is different from a material of the first layer sidewall spacer;
- the first semiconductor substrate is a group of semiconductor materials or a group of three or five semiconductor materials, wherein: the group of semiconductor materials are silicon, germanium or germanium silicon, and three or five semiconductors.
- the material is gallium arsenide or indium arsenide.
- the etching described above in the method of preparing a quasi-SOI source-drain multi-gate device is anisotropic dry etching
- the barrier layer may be etched by using a photoresist or a hard mask, and the hard mask may be silicon oxide or silicon nitride.
- the hard mask remaining on the top of the strip of the first semiconductor substrate Fin may be selected to form a double gate structure device, or the hard mask on the top of the Fin strip of the first semiconductor material may be finally formed.
- Triple gate structure device After performing the STI isolation in the step 2), the hard mask remaining on the top of the strip of the first semiconductor substrate Fin may be selected to form a double gate structure device, or the hard mask on the top of the Fin strip of the first semiconductor material may be finally formed.
- the step 3) further comprises the steps of: first thermally forming a layer of oxide on the substrate as a gate dielectric layer, followed by low pressure chemical vapor deposition (LPCVD) deposition and CMP planarization to form a gate material layer, and then employing Forming a gate hard mask layer by LPCVD, finally etching and etching the gate dielectric layer, the gate material layer and the gate hard mask layer to form a gate stack structure;
- the gate dielectric may be the first formed by oxidation and subsequent annealing An oxide and an oxynitride of a semiconductor substrate, or a dielectric material having a high dielectric constant formed by ALD, alumina, yttria or yttria, and may also be oxides and oxynitrides of the first semiconductor substrate and A composition of a high dielectric constant dielectric material;
- the gate material is polysilicon formed by CVD, or a conductive material formed by ALD or PVD, specifically titanium nitride, tantalum
- the doping structure for forming the source-drain extension region adopts an implantation technique of a conventional beam line ion implantation technique, a plasma doping technique, or Monolayer deposition doping technique; the material of the first layer sidewall on both sides of the gate stack is silicon nitride, which is formed by CVD and anisotropic dry etching.
- the U-shaped recess source-drain structure in the step 5) is etched so that the Fin strip of the first semiconductor substrate is Full etching, the etching depth is H1, and the etching depth below the bottom of the Fin strip is H2; the source-drain structure of the crucible recess is continued to use the TMAH etching solution based on the source-drain structure of the U-shaped recess Anisotropic wet etching of the first semiconductor substrate, the etching depth is H3, and when H3 is greater than H2, a germanium-type recessed source-drain structure is formed; the S-shaped recessed source-drain structure is the basis of the source-drain structure of the U-shaped recess First, a second layer of sidewalls having a width L2 is formed by CVD and anisotropic dry etching.
- the material of the second sidewall spacer is different from the material of the first sidewall spacer and has a 1:5 for the first semiconductor material.
- the anisotropic dry etching selection ratio is followed by the isotropic dry etching of the first semiconductor substrate, the longitudinal etching depth is H4, the lateral etching width is L3, and the S-shaped depression is formed when L3 is greater than L2. Source-drain structure, simultaneously through isotropic wet etching Off the second spacer layer.
- the etch depth of the source-drain structure of the U-shaped recess is ⁇ 2
- the etch depth of the source-drain structure of the ⁇ -shaped recess is H2+H3
- the etch depth of the source-drain structure of the S-type recess is H2+H4.
- the etch depth H5 of the U-shaped recess source/drain structure is smaller than the etch depth of the U-shaped recess source/drain structure,
- the etching depth of the source-drain structure of the germanium-shaped recess or the etching depth of the source-drain structure of the S-shaped recess makes the window of the recessed source/drain extension area have a window, and the epitaxial process can be followed to form source-drain contact.
- step 6 of the method for preparing a quasi-SOI source-drain multi-gate device the material of the quasi-SOI source/drain isolation layer is different from the material of the first layer sidewall spacer, and silicon oxide or alumina having better thermal conductivity may be selected. .
- the material of the in-situ doped epitaxial second semiconductor in the step 7) is the same as or different from the material of the first semiconductor, and the in-situ doping epitaxial
- the second semiconductor material forms a CMOS source and drain, and may perform P-type doping on the PMOS or N-type doping the MOS;
- the annealing activation mode used in the step 7) is selected from one or more of the following modes: Annealing, rapid thermal annealing, blaze annealing, and laser annealing.
- I. forming a Fin strip-shaped active region on a silicon substrate by photolithography and etching a) forming a first layer of silicon oxide on the silicon substrate by thermal oxidation as a buffer layer of silicon nitride; b) The first layer of silicon oxide is LPCVD first layer of silicon nitride as a CMP stop layer; c) photolithography and anisotropic dry etching of the first layer of silicon nitride and the first layer of silicon oxide to form a hard silicon Fin strip Mask layer
- II. Perform STI formation of STI isolation layer a) deposit a second layer of silicon oxide by high density plasma chemical vapor deposition (HDPCVD) as an STI trench backfill material; b) planarize the second layer of silicon oxide by CMP, stop at The first layer of silicon nitride; c) anisotropic dry etching of the second layer of silicon oxide, the height of the Fin strip of the silicon substrate after etching is HI; d) isotropic wet etching to remove the first layer of nitride Silicon and a first layer of silicon oxide.
- HDPCVD high density plasma chemical vapor deposition
- the recessed source/drain structure may be a U-shaped recess source/drain structure, a sag-shaped recess source/drain structure or an s-type recess source/drain structure, and the recessed source and drain extends by controlling the etch depth of the recessed source/drain structure Area reserved window
- etching the silicon substrate by anisotropic dry etching the Fin strip of the silicon substrate is completely etched, the etching depth is H1, and the etching depth below the bottom of the Fin strip is H2, forming a U-shaped recess source-drain structure,
- the etch depth of the source-drain structure of the U-shaped recess is H2;
- the etch depth of the source-drain structure of the recess is the sum of H2 and H3;
- the isotropic dry etching process is removed; then the silicon substrate is etched by isotropic dry etching, the longitudinal etching depth is H4, the lateral etching width is L3, and when L3 is larger than L2, the S-shaped concave source-drain structure is formed, and at the same time Isotropic wet etching removes the fourth layer of silicon oxide (
- the second layer of sidewall spacers; the etch depth of the source-drain structure of the S-type recess is the sum of H2 and H4.
- a quasi-SOI source-drain isolation layer over the recessed source-drain structure a) depositing a first layer of alumina by LPCVD as a quasi-SOI source-drain spacer material; b) planarizing the first layer of alumina by CMP, stopping On the second layer of silicon nitride (gate hard mask layer); c) anisotropic dry etching of the first layer of alumina, stopping on the second layer of silicon oxide (STI silicon oxide); d) isolating the first layer of alumina by isotropic wet etching to form a thickness of H5
- the SOI source-drain isolation layer, the quasi-SOI source-drain isolation layer formed on the U-shaped recess source-drain structure satisfies H5 less than H2, and the quasi-SOI source-drain isolation layer formed on the yt-type recess source-drain structure satisfies H5 less than H2 and The sum of H3, the quasi-SOI source-d
- the invention has the following technical effects:
- the method for preparing a quasi-SOI source-drain multi-gate device provided by the invention has the characteristics of good gate control performance of the multi-gate structure, and has more advantages than the existing planar quasi-SOI source-drain device preparation process. Small leakage current and lower power consumption.
- the preparation process provided by the present invention overcomes the shortcomings of the existing thermal budget of the preparation process of the quasi-SOI source-drain multi-gate structure device and can only adopt the limitation of the silicon substrate material, and has a small thermal budget;
- the process can be compatible with traditional CMOS processes; it can also be applied to semiconductor materials such as germanium, germanium silicon and tri-five, other than silicon; it is beneficial to large-scale integrated circuit manufacturing.
- FIGS. 1 to 22 are schematic diagrams showing the structure of a device formed in a specific implementation flow of a quasi-SOI source-drain silicon multi-gate device according to the present invention, wherein:
- Figure 1 is a schematic view showing the structure of a device after forming a silicon Fin strip.
- FIG. 2 is a schematic view showing the structure of a device after forming an STI isolation layer by STI.
- 3 is a schematic view showing the structure of a device after forming a gate stacked structure with a gate hard mask.
- 4 is a schematic view showing the structure of the device after forming the first layer of sidewalls on both sides of the gate stack structure.
- Fig. 5 is a schematic view showing the structure of a device after forming a U-shaped recessed source/drain structure.
- Figure 6 is a cross-sectional view of Figure 5 taken along the line AA.
- FIG. 7 is a schematic view showing the structure of a device after forming a germanium-type recessed source/drain structure.
- FIG. 8 is a cross-sectional view of Figure 7 taken along the line AA.
- FIG. 9 is a schematic view showing the structure of the device after forming the second layer sidewall in the process of forming the S-type recess source/drain structure.
- Figure 10 is a cross-sectional view of Figure 9 taken along the line AA.
- FIG. 11 is a schematic view showing the structure of the device after removing the second layer sidewall in the process of forming the S-type recess source/drain structure.
- Figure 12 is a cross-sectional view of Figure 11 taken along the line AA.
- Figure 13 is a schematic view showing the structure of a device after forming a quasi-SOI source-drain isolation layer on a U-shaped recess source-drain structure.
- Figure 14 is a cross-sectional view of Figure 13 taken along the line AA.
- Fig. 15 is a schematic view showing the structure of a device after forming a quasi-SOI source/drain isolation layer on a source-drain structure of a germanium-type recess.
- Figure 16 is a cross-sectional view of Figure 15 taken along the line AA.
- Fig. 17 is a schematic view showing the structure of a device after forming a quasi-SOI source/drain isolation layer on a source-drain structure of an S-type recess.
- Figure 18 is a cross-sectional view of Figure 17 taken along the line AA.
- Figure 19 is a schematic view showing the structure of the device after in-situ doping of the source and drain and annealing.
- FIG. 20 is a schematic view showing the structure of the device after the dummy gate is removed in the gate-last process.
- Figure 21 is a schematic view showing the structure of a device after reforming a high-k metal gate.
- Figure 22 is a schematic view showing the structure of a device after forming a contact and a metal interconnection. In Figure 1 to Figure 22:
- Figure 23 is an illustration of the materials used. BEST MODE FOR CARRYING OUT THE INVENTION
- the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings, and a process scheme for the preparation of a quasi-S0I source-drain multi-gate device proposed by the present invention is specifically provided, but the scope of the present invention is not limited in any way.
- the specific implementation steps of preparing a quasi-S0I source-drain multi-gate device through a gate-last process on a silicon substrate are as follows:
- a first layer of silicon oxide 2 of 100 A is formed on the silicon substrate 1 by thermal oxidation as a buffer layer of silicon nitride.
- a 500 A first layer of silicon nitride 3 was deposited by LPCVD on the first layer of silicon oxide as a CMP stop layer.
- the silicon substrate 3000A is anisotropically dry etched to form a silicon Fin strip 4, and the width of the silicon Fin strip after etching is 10 nm, as shown in FIG. 5.
- the second layer of silicon oxide 5 is planarized by CMP and stopped on the first layer of silicon nitride 3.
- a 50 A third layer of silicon oxide 6 is formed on the silicon substrate by thermal oxidation as a dummy gate dielectric layer.
- a first layer of polysilicon 7 of 2000A is deposited by LPCVD as a dummy gate material layer.
- a 500A second layer of silicon nitride 8 is deposited by LPCVD as a gate hard mask layer.
- FIG. 6 is a cross-sectional view of FIG. 5 taken along the line AA.
- a fourth layer of silicon oxide 12 of 300 A is deposited by LPCVD as a second layer of sidewall material.
- Fig. 11 is a cross-sectional view of Fig. 11 in the direction of the tangential direction of AA.
- a first layer of alumina 14 of 5000 A is deposited by LPCVD as a quasi-SOI source-drain spacer material.
- the first layer of aluminum oxide 14 is planarized by CMP and stopped on the second layer of silicon nitride 8 (gate hard mask layer). 25. Anisotropic dry etching of the first layer of aluminum oxide 14 of 1250A is stopped on the second layer of silicon oxide 5, i.e., STI silicon oxide.
- FIG. 14 is a cross-sectional view in the tangential direction of FIG. 13; for the ⁇ -shaped recessed source-drain structure, H5 ⁇ H2 + H3 should be satisfied, as shown in FIG. 15, FIG. 16 is a tangent line in FIG. A cross-sectional view in the direction; for the S-shaped recessed source-drain structure, H5 ⁇ H2 + H4 should be satisfied, as shown in Fig. 17, and Fig. 18 is a cross-sectional view of Fig. 17 in the direction of the tangential direction of AA.
- the previous dummy gate should be removed to re-deposit the high-k metal gate, including:
- the first layer of polysilicon 7, which is 1000A, is removed by isotropic wet etching using a TMAH solution; that is, a dummy gate material layer;
- the third layer of silicon oxide 6, which is a 50A layer, is removed by isotropic wet etching using a hydrofluoric acid solution, as shown in FIG. 20;
- the first metal gate 17 is planarized by CMP and stopped on the fifth layer of silicon oxide 16, as shown in FIG.
Landscapes
- Thin Film Transistor (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/026,396 US20160247726A1 (en) | 2013-12-18 | 2014-03-31 | Method for fabricating a quasi-soi source-drain multi-gate device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310696063.0 | 2013-12-18 | ||
| CN201310696063.0A CN103700593B (zh) | 2013-12-18 | 2013-12-18 | 制备准soi源漏多栅器件的方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015089952A1 true WO2015089952A1 (zh) | 2015-06-25 |
Family
ID=50362083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/074361 Ceased WO2015089952A1 (zh) | 2013-12-18 | 2014-03-31 | 制备准soi源漏多栅器件的方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20160247726A1 (zh) |
| CN (1) | CN103700593B (zh) |
| WO (1) | WO2015089952A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160064529A1 (en) * | 2013-03-28 | 2016-03-03 | Peking University | Method for fabricating multi-gate structure device with source and drain having quasi-soi structure |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106611780A (zh) * | 2015-10-27 | 2017-05-03 | 上海新昇半导体科技有限公司 | 量子阱器件及其形成方法 |
| CN107293588A (zh) * | 2016-03-30 | 2017-10-24 | 中芯国际集成电路制造(上海)有限公司 | 半导体装置及其制造方法 |
| US11018225B2 (en) * | 2016-06-28 | 2021-05-25 | International Business Machines Corporation | III-V extension by high temperature plasma doping |
| CN106653677A (zh) * | 2016-09-22 | 2017-05-10 | 东莞市联洲知识产权运营管理有限公司 | 一种soi片的制备方法 |
| US10269940B2 (en) * | 2017-06-30 | 2019-04-23 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device and method |
| US10840355B2 (en) * | 2018-05-01 | 2020-11-17 | Taiwan Semiconductor Manufacturing Company, Ltd. | Increasing source/drain dopant concentration to reduced resistance |
| US12191145B2 (en) * | 2022-06-07 | 2025-01-07 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device and formation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581431A (zh) * | 2003-08-14 | 2005-02-16 | 三星电子株式会社 | 多结构的硅鳍形及制造方法 |
| CN103151269A (zh) * | 2013-03-28 | 2013-06-12 | 北京大学 | 制备源漏准soi多栅结构器件的方法 |
| US20130175621A1 (en) * | 2012-01-11 | 2013-07-11 | Tong-Yu Chen | Finfet structure and method for making the same |
-
2013
- 2013-12-18 CN CN201310696063.0A patent/CN103700593B/zh active Active
-
2014
- 2014-03-31 WO PCT/CN2014/074361 patent/WO2015089952A1/zh not_active Ceased
- 2014-03-31 US US15/026,396 patent/US20160247726A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581431A (zh) * | 2003-08-14 | 2005-02-16 | 三星电子株式会社 | 多结构的硅鳍形及制造方法 |
| US20130175621A1 (en) * | 2012-01-11 | 2013-07-11 | Tong-Yu Chen | Finfet structure and method for making the same |
| CN103151269A (zh) * | 2013-03-28 | 2013-06-12 | 北京大学 | 制备源漏准soi多栅结构器件的方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160064529A1 (en) * | 2013-03-28 | 2016-03-03 | Peking University | Method for fabricating multi-gate structure device with source and drain having quasi-soi structure |
| US9356124B2 (en) * | 2013-03-28 | 2016-05-31 | Peking University | Method for fabricating multi-gate structure device with source and drain having quasi-SOI structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103700593A (zh) | 2014-04-02 |
| US20160247726A1 (en) | 2016-08-25 |
| CN103700593B (zh) | 2016-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20230028568A1 (en) | Source/drain contacts for non-planar transistors | |
| CN103681355B (zh) | 制备准soi源漏场效应晶体管器件的方法 | |
| KR102050779B1 (ko) | 반도체 소자 및 이의 제조 방법 | |
| KR101802715B1 (ko) | 반도체 디바이스의 제조 방법 | |
| CN111180513B (zh) | 半导体器件及其形成方法 | |
| WO2015089952A1 (zh) | 制备准soi源漏多栅器件的方法 | |
| US20150024561A1 (en) | Method for fabricating a finfet in a large scale integrated circuit | |
| CN104253046B (zh) | 鳍式场效应晶体管及其形成方法 | |
| CN109979986B (zh) | 半导体器件及其形成方法 | |
| CN110648915B (zh) | 半导体器件及其形成方法 | |
| CN104733315B (zh) | 半导体结构的形成方法 | |
| CN105513965B (zh) | 晶体管的形成方法 | |
| US9356124B2 (en) | Method for fabricating multi-gate structure device with source and drain having quasi-SOI structure | |
| CN105826364B (zh) | 晶体管及其形成方法 | |
| CN106952959A (zh) | 一种锗硅沟道鳍式场效应晶体管及其制备方法 | |
| CN106098783B (zh) | 一种鳍式场效应晶体管及其制备方法 | |
| CN106898553A (zh) | 一种鳍式场效应晶体管及其制备方法 | |
| CN105576024A (zh) | 半导体结构及其形成方法 | |
| CN106558493A (zh) | 鳍式场效应管的形成方法 | |
| CN106206306B (zh) | 鳍式场效应晶体管及其形成方法 | |
| CN104347413B (zh) | 一种制作FinFET半导体器件的方法 | |
| US20250234610A1 (en) | Low-resistance source/drain features | |
| CN103681324A (zh) | Mos晶体管的制作方法 | |
| CN103165509B (zh) | 准绝缘体上硅场效应晶体管的制备方法 | |
| CN104078355A (zh) | 鳍式场效应晶体管的形成方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14872136 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 15026396 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 24.08.2016) |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14872136 Country of ref document: EP Kind code of ref document: A1 |