WO2010082504A1 - 半導体装置およびその製造方法、並びに半導体記憶装置 - Google Patents
半導体装置およびその製造方法、並びに半導体記憶装置 Download PDFInfo
- Publication number
- WO2010082504A1 WO2010082504A1 PCT/JP2010/000236 JP2010000236W WO2010082504A1 WO 2010082504 A1 WO2010082504 A1 WO 2010082504A1 JP 2010000236 W JP2010000236 W JP 2010000236W WO 2010082504 A1 WO2010082504 A1 WO 2010082504A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor
- layer
- region
- source
- conductivity type
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims description 157
- 238000004519 manufacturing process Methods 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 46
- 238000003860 storage Methods 0.000 title claims description 24
- 238000009792 diffusion process Methods 0.000 claims abstract description 108
- 239000000758 substrate Substances 0.000 claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 32
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000010410 layer Substances 0.000 claims description 215
- 239000010408 film Substances 0.000 claims description 176
- 239000010409 thin film Substances 0.000 claims description 49
- 239000012535 impurity Substances 0.000 claims description 38
- 239000013078 crystal Substances 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 24
- 238000012546 transfer Methods 0.000 claims description 24
- 238000002955 isolation Methods 0.000 claims description 23
- 239000012212 insulator Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 150000004767 nitrides Chemical class 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 6
- 229910052774 Proactinium Inorganic materials 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052707 ruthenium Inorganic materials 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 abstract description 28
- 238000010586 diagram Methods 0.000 description 32
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 29
- 238000005468 ion implantation Methods 0.000 description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 17
- 230000003071 parasitic effect Effects 0.000 description 17
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 15
- 229910052581 Si3N4 Inorganic materials 0.000 description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 13
- 230000006870 function Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- 238000002513 implantation Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 229910021334 nickel silicide Inorganic materials 0.000 description 5
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- -1 rare earth silicate Chemical class 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052735 hafnium Inorganic materials 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 210000000746 body region Anatomy 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 208000012868 Overgrowth Diseases 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1203—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body the substrate comprising an insulating body on a semiconductor body, e.g. SOI
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41775—Source or drain electrodes for field effect devices characterised by the proximity or the relative position of the source or drain electrode and the gate electrode, e.g. the source or drain electrode separated from the gate electrode by side-walls or spreading around or above the gate electrode
- H01L29/41783—Raised source or drain electrodes self aligned with the gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B10/00—Static random access memory [SRAM] devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B10/00—Static random access memory [SRAM] devices
- H10B10/12—Static random access memory [SRAM] devices comprising a MOSFET load element
- H10B10/125—Static random access memory [SRAM] devices comprising a MOSFET load element the MOSFET being a thin film transistor [TFT]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/665—Unipolar field-effect transistors with an insulated gate, i.e. MISFET using self aligned silicidation, i.e. salicide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78645—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate
- H01L29/78648—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate arranged on opposing sides of the channel
Definitions
- the present invention relates to a MISFET having a semiconductor / insulating film / metal laminated structure, and more specifically, a semiconductor device in which a MISFET is formed on a substrate having an SOI (SOI: Silicon on Insulator) structure, a manufacturing method thereof, and the semiconductor device.
- SOI Silicon on Insulator
- the present invention relates to a semiconductor memory device.
- MISFET Metal / Insulator / Semiconductor Field Effect Transistor
- Deterioration of the drive current becomes a problem due to the carrier mobility accompanying the increase. Further, when the impurity concentration is increased, the parasitic capacitance between the substrate, the source and the drain is increased, and the high speed operation of the MISFET is hindered.
- the threshold voltage Vth of these MISFETs is controlled by the impurity concentration of the channel region.
- the impurity concentration of the channel is controlled relatively well by using the ion implantation technique and the short-time heat treatment technique up to an LSI having a design rule of about 100 nm node.
- the method of controlling the threshold voltage Vth by the channel impurity amount contributes to the threshold voltage Vth of one MISFET as the channel length becomes shorter. Since the absolute number of impurities is reduced, variations in the threshold voltage Vth due to statistical fluctuations cannot be ignored (see Non-Patent Document 1). Therefore, it is desired as a process for micro devices that the threshold voltage Vth of the MISFET can be controlled by the work function of the gate electrode by controlling the impurity concentration of the channel portion and other methods. .
- an SOI Silicon on Insulator
- an insulating film for example, silicon oxide film
- soft errors and latch-ups are suppressed, and not only high reliability can be obtained even in highly integrated LSIs, but also diffusion layers. Therefore, charging / discharging associated with switching is reduced, which is advantageous for high speed and low power consumption.
- This SOI type MISFET has roughly two operation modes.
- One is a fully depleted SOI in which the depletion layer induced in the body region directly under the gate electrode reaches the bottom of the body region, that is, the interface with the buried oxide film, and the other is the depletion layer in the body region.
- SOI Partial Depletion
- the thickness of the depletion layer directly under the gate is limited by the buried oxide film, so that the depletion charge is significantly reduced compared to the partially depleted SOI-MISFET and contributes to the drain current instead.
- Mobile charge increases.
- S characteristic subthreshold characteristic
- the threshold voltage Vth can be lowered while suppressing off-leakage current.
- a drain current is ensured even at a low operating voltage, and it is possible to manufacture a MISFET with extremely low power consumption that operates at, for example, 1 V or less (the threshold voltage Vth is also 0.3 V or less).
- the substrate concentration can be lowered. Accordingly, a decrease in carrier mobility accompanying an increase in impurity scattering is suppressed, so that a high driving current can be achieved.
- a double gate MISFET structure is known as another conventional technique related to SOI-MISFET, and is proposed in Patent Document 1, for example.
- SOI-MISFET a source diffusion layer and a drain diffusion layer are formed in the SOI layer 105 in a self-alignment with the dummy gate electrode, then a reverse pattern groove of the dummy gate electrode is formed, and impurities from the groove to the support substrate 1 are formed.
- a buried gate is sequentially formed by ion implantation, and then a metal film such as W is selectively buried in the groove region to form an upper gate electrode.
- Realization of a double gate structure is an effective means for improving the performance of SOI-MISFET, but in a double gate MISFET structure based on a currently known method, a high-concentration diffusion layer or the like is not included in the support substrate without adversely affecting the SOI layer. It is extremely difficult to embed and form, and it has not yet been put to practical use.
- the buried gate is accurately aligned with the upper gate, and it is inevitably required to be arranged for each individual element. .
- the alignment error of the buried gate is fatal, and directly connected to variations in parasitic capacitance and drive current. Therefore, even if the parasitic capacitance is effectively used for stabilizing the dynamic operation, it cannot be used for stabilization unless capacitance variation is essentially suppressed.
- the threshold voltage of the double gate structure SOI-MISFET is determined only by the work function of each material of the upper gate and the buried gate, excluding the SOI layer thickness component, and it is substantially possible to set the threshold voltage value for each desired MISFET. Impossible. It is premised that the connection between the buried gate electrode and the upper gate electrode is performed outside the MISFET active region, that is, in the element isolation region, and consistency in consideration of the peripheral element layout is essential.
- a gate is formed on the well diffusion layer immediately below the SOI-MISFET.
- the conduction state of the SOI-MISFET is further accelerated by applying a high potential of a well potential through a thin buried insulating film, resulting in a significant increase in drive current, that is, an increase in current.
- the gate potential is applied to a low potential, the well potential is also lowered, so that the non-passing state can be reached more quickly.
- the isolation of the side surface of the well diffusion layer contributes to the reduction of parasitic capacitance, that is, the delay time constant of the applied signal. Further, the thinner the buried insulating film is, the more effective it is to improve the driving current increase effect. Ideally, the film thickness condition is equivalent to that of the gate insulating film of the SOI-MISFET.
- the SOI MISFET has excellent characteristics such as low power consumption and high speed.
- the above-described SOI type MISFET has the following problems.
- the P well / N well are electrically isolated from the support substrate by the buried oxide film.
- the STI used in the conventional MISFET formed on the bulk substrate It is not necessary to form an element isolation region (Shallow Trench Isolation), and as a result, the element area of the transistor can be reduced (see Non-Patent Document 2).
- the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to realize low power consumption and high-speed operation by controlling the substrate potential under the BOX and reduction in the element area of the transistor in the SOI MISFET. Another object is to provide a semiconductor device and a manufacturing method that can be used.
- an SOI substrate including a single crystal semiconductor substrate and a thin single crystal semiconductor thin film (SOI layer) separated from the single crystal semiconductor substrate by a thin buried insulating film is used.
- the present invention is premised on application to an ultrafine fully depleted SOIMISFET having a gate length of 100 nm or less, and further 50 nm or less.
- the buried insulating film is 50 nm or less, preferably 10 nm or less, and the thin single crystal semiconductor thin film is 20 nm or less, preferably An SOI substrate having a thickness of about 10 nm is used.
- the present invention mainly includes a first semiconductor element and a second semiconductor element provided on a semiconductor support substrate, and the first semiconductor element has a first conductivity type provided on the semiconductor support substrate.
- a single crystal semiconductor thin film provided on the first semiconductor layer via a buried insulator thin film, and a first conductivity type and a reverse conductivity type provided in the semiconductor layer.
- a first source region and a first drain region having a conductivity type of 2, and a first channel region provided so as to be in contact with each region between the first source region and the first drain region;
- a first gate electrode provided via a first gate insulating film provided on the first channel region, and the second semiconductor element has a second conductive property provided on the semiconductor support substrate.
- Second semiconductor layer having a shape, and on the second semiconductor layer A single crystal semiconductor thin film provided via a buried insulator thin film, a second source region and a second drain region having a first conductivity type provided in the single crystal semiconductor thin film, and a second source region And a second channel region provided so as to be in contact with each region and a second gate insulating film provided on the second channel region.
- the provided second impurity region having the second conductivity type is electrically isolated by the element isolation layer, and the first source region and the second drain region, or the first drain region and the second source are separated. Regions are one end of each region Contact with the provided in the single crystal semiconductor thin film, and is electrically connected by a conductor layer provided on the single crystal semiconductor thin film.
- a contact layer electrically connected to the conductor layer provided via the single crystal semiconductor thin film is provided in a through hole provided above the element isolation layer and penetrating the interlayer insulating layer on the conductor layer. It has been.
- the thickness of the buried insulator layer is 20 nm or less, and the thickness of the semiconductor layer is 20 nm or less.
- the first impurity region formed in the first conductivity type formed in contact with the embedded insulator layer and the embedded insulator layer in the second semiconductor substrate are formed in contact with each other.
- the second impurity region formed in the second conductivity type, the first impurity region, and the second impurity region are electrically separated by an element isolation layer, and each of the N conductivity type MISFET and Each P-conductivity type MISFET can operate at low power consumption and high speed by applying a substrate potential.
- first source / drain region and the second source / drain region are made common and are directly electrically connected by metal silicide. That is, as a result, in the SOI type MISFET having low power consumption and high speed operation, it is possible to reduce the element area of the transistor.
- the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region serving as the output part of the CMISFET is made common and directly connected by metal silicide. For this reason, the wiring resistance can be reduced as compared with the conventional case where the wiring connection hole metal / wiring is used. As a result, in the SOI type MISFET having low power consumption and high speed operation, it is possible to reduce the element area of the transistor.
- FIG. 3 is a completed cross-sectional view of a MISFET shown in Example 1 of the present invention.
- 1 is a plan view of a semiconductor device shown in Embodiment 1 of the present invention.
- 1 is a plan view of a semiconductor device shown in Embodiment 1 of the present invention.
- FIG. 7 is a completed cross-sectional view of a conventional semiconductor device MISFET. The top view which shows the conventional semiconductor device.
- 1 is a plan view of a conventional semiconductor device shown in Example 1.
- FIG. FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- 4A and 4B illustrate a manufacturing process shown in Embodiment 1.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 5 is a diagram illustrating a manufacturing process of the MISFET shown in the first embodiment.
- FIG. 4 is a completed cross-sectional view of a MISFET shown in Example 2.
- FIG. 6 is a diagram illustrating a manufacturing process of a MISFET shown in Example 2.
- FIG. 4 is a completed cross-sectional view of a MISFET shown in Example 3.
- FIG. 6 is a diagram for explaining a manufacturing process of the MISFET shown in Example 3;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4;
- FIG. 10 is a
- FIG. 10 is a diagram for explaining a manufacturing process of the MISFET shown in Example 4; 6 is a schematic diagram of a circuit configuration of an SRAM memory cell shown in Embodiment 5.
- FIG. FIG. 6 is a schematic diagram of a layout of an SRAM memory cell shown in a fifth embodiment.
- FIG. 6 is a schematic diagram of a layout of an SRAM memory cell shown in a fifth embodiment.
- FIG. 6 is a schematic diagram of a layout of an SRAM memory cell shown in a fifth embodiment.
- 10 is a schematic diagram of a circuit configuration of an SRAM memory cell shown in Example 6.
- FIG. FIG. 10 is a schematic diagram of a layout of an SRAM memory cell shown in Example 6; Schematic of the layout of a conventional SRAM memory cell.
- FIG. 1 is a completed sectional view of a MISFET according to the first embodiment 1 of the present invention.
- the manufacturing process will be described with reference to FIG.
- the semiconductor substrate and the semiconductor film will be described with the conductivity type fixed, but the combination of conductivity types may be arbitrary, and is not limited to the conductivity type described in this embodiment.
- a silicon oxide film 4 having a thickness of 10 nm is formed on a semiconductor substrate 1 made of single crystal Si having a plane orientation (100), a P conductivity type, a resistivity of 10 ohm ⁇ cm, and a diameter of 20 cm.
- a semiconductor substrate was used. Hydrogen ion implantation was performed on the first substrate based on a known ultra-thin SOI substrate manufacturing method. The injection amount was 5 ⁇ 10 16 / cm 2 . As a result of the ion implantation, a crystal defect layer was formed in the semiconductor Si thin film 3 having a depth of about 40 nm from the main surface of the single crystal Si substrate.
- each of the second semiconductor substrates having the same specifications as the first semiconductor substrate having no silicon oxide film on the surface was subjected to a hydrophilic treatment, and the main surfaces were brought into close contact with each other at room temperature.
- the two Si substrates that were brought into close contact with each other were heated to 500 ° C., but this heat treatment resulted in the formation and increase of microvoids in the crystal defect layer, and the single crystal Si substrate was peeled off at the crystal defect layer portion and supported.
- a 10 nm thick silicon oxide film 2 and a single crystal Si thin film 3 of about 20 nm thickness were adhered on the substrate 1.
- the adhesive strength between the silicon oxide film 4 and the support substrate 1 was remarkably improved, and the adhesive strength was comparable to that of a normal single crystal substrate.
- the surface of the single crystal Si thin film 3, that is, the peeled surface is mirror-polished by a surface polishing method that does not include abrasive grains, and a thin embedded gate insulating film 4 is formed on the support substrate 1 in order under the single crystal Si thin film 3.
- the manufactured SOI substrate was manufactured.
- the SOI substrate described above does not need to be manufactured based on the above method, and there is no problem even if it is based on the purchase of a commercially available substrate having similar specifications. In that case, after forming a silicon oxide film on the SOI substrate, the silicon oxide film is removed, and the Si layer is thinned until a desired single crystal Si layer is formed (FIG. 8).
- a silicon oxide film 36 and a silicon nitride film 37 were formed on the SOI substrate (FIG. 9).
- the silicon nitride film formed here is used as a polishing stopper in chemical mechanical polishing in the subsequent shallow groove element isolation formation.
- the resist mask 35 After applying the resist mask 35, only the resist mask in the desired region was removed (FIG. 10). Thereafter, the silicon nitride film 37, the silicon oxide film 36, and the single crystal Si layer 3 in the desired region were removed (FIG. 11).
- the resist mask was removed after patterning so that the elements constituting the pair of complementary MISFETs were arranged on the same well diffusion layer.
- a thin oxide film is formed on the exposed Si region and a thick silicon oxide film 39 is deposited on the entire surface to fill the patterning region based on a known element isolation insulating film formation method (see FIG. 11).
- FIG. 12 the thick silicon oxide film exposed by selective removal of the silicon nitride film on the region selectively left by the deposition of the silicon nitride film and the previous patterning and a predetermined distance from the region is chemically and mechanically removed. It was removed by polishing. The polishing end point is the previously deposited silicon nitride film and the silicon nitride film 37 left on the pattern. Subsequently, the silicon nitride film 37 and the like were selectively removed with hot phosphoric acid (FIG. 13).
- the SOI type MISFET formation region is selectively N-conductive in a desired region of the support substrate 1 by ion implantation through the thin silicon oxide film 36, the thin oxide single crystal Si film 3 and the thin buried insulating film 4.
- a well diffusion layer 6 of the mold was formed.
- an SOI type MISFET formation region is selectively formed in a desired region of the support substrate 1 by ion implantation through the thin silicon oxide film 36, the thin oxide single crystal Si film 3, and the thin buried insulating film 4.
- a conductive type well diffusion layer 7 was formed (FIG. 14).
- the threshold voltage control diffusion layer regions 25 and 26 in the N-type and P-type SOI MISFET formation regions are ion-implanted through the thin silicon oxide film 36, the thin single crystal Si film 3, and the thin buried insulating film 4. Formed (FIG. 15).
- the threshold voltage control diffusion layer regions 25 and 26 are electrically connected to the outside, for example, a power supply line.
- the silicon oxide film 36 and the like are selectively removed by hydrofluoric acid cleaning or the like to expose the surface of the single crystal Si thin film 3, and then, for example, an oxide film of 1.8 nm is formed and the surface is nitrided with NO gas to reduce the thickness to 0.1.
- a 2 nm nitride film was laminated on the main surface to form a gate insulating film 5.
- the gate insulating film is a rare earth oxide film such as Al, Zr, Hf, Y, La or a rare earth silicate film, or a rare earth oxide such as Zr, Hf, Y, La formed on the Al oxide film and the Al oxide film.
- a laminated film of a material film or a rare earth silicate film is used.
- a polycrystalline Si film 38 having a thickness of, for example, 100 nm was deposited on the gate insulating film 5 by a chemical vapor deposition method.
- a gate protective film 38 mainly composed of a silicon nitride film is deposited on the entire surface of the polycrystalline Si film 21, and then a gate electrode and a gate protective film are formed by patterning by a conventionally known MISFET manufacturing method. Performed (FIG. 16).
- ions in the N-conducting MISFET region and BF 2 ions in the P-conducting MIGFET region are implanted under the conditions of an implantation amount of 4 ⁇ 10 15 / cm 2 with acceleration energy of 1 keV and 600 eV, respectively.
- Ion implantation is performed, and the ultra-shallow N-conductivity type high-concentration source diffusion layer 8, the ultra-shallow N-conductivity-type high-concentration drain diffusion layer 9, the ultra-shallow P-conductivity-type high-concentration source diffusion layer 10, and the ultra-shallow P-conductivity type.
- a high concentration drain diffusion layer 11 was formed in the main surface region of the single crystal Si film 3 (FIG. 17).
- a silicon oxide film having a thickness of 70 nm is deposited on the entire surface, and then anisotropic dry etching is performed to selectively leave the gate electrode side wall portion to form the gate side wall insulating film 12 (FIG. 18).
- anisotropic dry etching is performed to selectively leave the gate electrode side wall portion to form the gate side wall insulating film 12 (FIG. 18).
- As ions are implanted into the N-conducting MISFET region, and BF2 ions are implanted into the SOI-type and bulk-type P-conducting MIGFET regions, for example, with an acceleration energy of 25 keV and 15 eV, respectively.
- the deep source diffusion layer and the drain diffusion layer region are formed in the SOI MISFET region for the purpose of reducing the capacity of the source / drain diffusion layer region. This is formed by the same manufacturing method as the method for reducing the junction capacitance of a conventionally known bulk type MISFET.
- an impurity compensation region is formed by implanting ions of the opposite conductivity type at a concentration and acceleration energy that should be compensated for the threshold voltage adjustment implanted ions previously implanted by ion implantation as an implantation element mask. But that is the purpose.
- this step is a step applied for the purpose of reducing the capacity of the source / drain diffusion layer region. In the case of a semiconductor integrated circuit that does not need to reduce parasitic capacitance, for example, when this structure is applied to a static memory (SRAM) circuit where the stability of the memory cell is important, this step can be omitted. There is no problem.
- the STI element isolation layer 2 in the region where the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region is made common is removed by the film thickness of the single crystal Si layer 3, and the STI element isolation layer is obtained. 2 is formed to expose the Si layer on the side surfaces of the diffusion layer regions of the N-conductivity type MISFET region and the P-conductivity type MISFET region (FIG. 20).
- the step of forming the contact between the gate electrode and the well is performed by selective epi growth simultaneously with the step of forming the stacked Si film on the source / drain diffusion layer. By this step, it is not necessary to perform the contact formation step as a step independent of the others, and the process can be simplified.
- N-conductivity type and P-conductivity type impurity implantations are performed using ion implantation into the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region formed using the selective epitaxial method.
- the silicon nitride film 37 is selectively removed with hot phosphoric acid (FIG. 22), the silicon gate polycrystalline Si film 38 is exposed, and then a 30 nm thick Ni (nickel) film is formed by sputtering.
- the entire area of the exposed gate electrode and at least the upper area of the N-conductivity type and P-type high concentration accumulation area are selectively silicided by heat treatment at 450 ° C.
- Metal silicide source / drain region 20 Metal silicide source / drain region 20.
- the silicon gate electrode to which no impurities were added was converted into a nickel silicide film up to the region in contact with the gate insulating film, and the resistance was reduced.
- the stacked Si film on the source / drain diffusion layer is not entirely silicided, and a low-resistance polycrystalline Si film is left in the bottom region, and the very shallow N conductivity type source / drain diffusion layer 8 in the thin single crystal Si is left. , 9 and the shallow P-conductivity type source / drain diffusion layers 10, 11 were preserved.
- the gate electrode 20 is composed of a metal silicide film.
- the threshold voltage value can be set to almost 0 V in both the N conductivity type MISFET and the P conductivity type MISFET, regardless of the fully depleted type SOIIGFET.
- the single crystal Si thin film 3 constituting the channel is finally formed to be as thin as 10 nm, the source and drain regions have a stacked structure, and most of the stacked structure is the metal silicide film 20. Therefore, it was possible to solve the problem of increase in contact resistance between the semiconductor and the metal silicide film and increase in series resistance.
- an ion implantation process for reducing the parasitic capacitance of the source and drain diffusion layer regions in the SOI MISFET region and the resistance of the source and drain diffusion layer regions in the bulk MISFET region are reduced.
- the ion implantation process for the common process under the same conditions, it is possible to realize a large drive current for the SOI type MISFET and at the same time to reduce the bottom parasitic capacitance of the well diffusion layers 6 and 7. .
- the parasitic capacitance can be reduced by about one digit even in the same well occupation area configuration as compared with the well structure in the case where ion implantation for reducing the capacitance is not performed.
- the connection region can be set regardless of the upper wiring. As a result, a large current and high driving capability of the semiconductor device can be realized. Further, by improving the conventional STI structure, as shown in FIG. 2 and FIG. 3, in the SOI type MISFET excellent in low power consumption and high speed, the diffusion layer regions of the N conduction type MISFET region and the P conduction type MISFET region are formed. While being shared, the well diffusion layer to which the substrate potential was applied could be separated by the STI layer. In the prior art, as shown in FIGS.
- the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region and the well diffusion layer to which the substrate potential is applied are separated by STI. Therefore, according to the present invention, it is possible to reduce at least the minimum pitch and the area corresponding to one pitch at each technology node for manufacturing a semiconductor element. Further, the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region which become the output part of the CMISFET are made common and directly connected by metal silicide. For this reason, the wiring resistance can be reduced as compared with the conventional case where the wiring connection hole metal / wiring is used. As described above, in the SOI type MISFET having low power consumption and high speed operation, the element area of the transistor can be reduced.
- the thin buried insulating film 4 be as thin as possible within a film thickness range in which leakage current is negligible, and it is preferably 10 nm or less, more preferably about the same as the gate insulating film 5.
- a film thickness of about 2 nm is desirable.
- the gate electrode material is not limited to the Ni silicide film, but is a metal such as Ni, Co, Ti, W, Ta, Mo, Cr, Al, Pt, Pa, Ru, or a metal silicide film.
- any material may be used as long as the work function of the metal nitride film is approximately in the center of the forbidden band of the single crystal Si thin film.
- FIG. 25 is a cross-sectional view of a semiconductor device showing Example 2 of the fifth embodiment according to the present invention.
- the semiconductor device is basically manufactured according to the above embodiment. However, as shown in FIG. 25, the diffusion layer region 21 stacked on the source / drain is higher than the gate electrode 20. It is formed.
- the gate electrode 20 needs to be silicided in the entire region to be a silicided gate electrode.
- the stacked Si film on the source / drain diffusion layer is not entirely silicided, and a low-resistance polycrystalline Si film is left in the bottom region, so that the source / drain diffusion of the very shallow N conductivity type in the thin single crystal Si is performed.
- the layers 8 and 9 and the shallow P conductivity type source / drain diffusion layers 10 and 11 need to be preserved. In this case, if the entire bottom surface region is silicified, the contact area between the channel region and the source / drain diffusion layer decreases, and the resistance increases.
- the height of the gate electrode 20 is set lower than that of the diffusion layer region 21 stacked on the source / drain. Therefore, even if the entire region of the gate electrode 20 is silicided, The entire stacked Si film on the drain diffusion layer is not silicided, and a low-resistance polycrystalline Si film is left in the bottom region.
- this embodiment it is possible to provide a method for manufacturing a semiconductor device with a better yield.
- the gate electrode 20 is composed of a metal silicide film.
- the threshold voltage value can be set to almost 0 V in both the N conductivity type MISFET and the P conductivity type MISFET, regardless of the fully depleted type SOIIGFET.
- the single crystal Si thin film 3 constituting the channel is finally formed to be as thin as 10 nm, the source and drain regions have a stacked structure, and most of the stacked structure is the metal silicide film 20. Therefore, it was possible to solve the problem of increase in contact resistance between the semiconductor and the metal silicide film and increase in series resistance.
- an ion implantation process for reducing the parasitic capacitance of the source and drain diffusion layer regions in the SOI MISFET region and the resistance of the source and drain diffusion layer regions in the bulk MISFET region are reduced.
- the ion implantation process for the common process under the same conditions, it is possible to realize a large drive current for the SOI type MISFET and at the same time to reduce the bottom parasitic capacitance of the well diffusion layers 6 and 7. .
- the parasitic capacitance can be reduced by about one digit even in the same well occupation area configuration as compared with the well structure in the case where ion implantation for reducing the capacitance is not performed.
- the connection region can be set regardless of the upper wiring. As a result, a large current and high driving capability of the semiconductor device can be realized.
- the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region are formed. While being shared, the well diffusion layer to which the substrate potential was applied could be separated by the STI layer.
- the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region and the well diffusion layer to which the substrate potential is applied are separated by STI. Therefore, according to the present invention, it is possible to reduce at least the minimum pitch and the area corresponding to one pitch at each technology node for manufacturing a semiconductor element.
- the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region which become the output part of the CMISFET are made common and directly connected by metal silicide. For this reason, the wiring resistance can be reduced as compared with the conventional case where the wiring connection hole metal / wiring is used. As described above, in the SOI type MISFET having low power consumption and high speed operation, the element area of the transistor can be reduced.
- the thin buried insulating film 4 be as thin as possible within the range where the leakage current is negligible, and it is preferably 10 nm or less, more preferably about the same as the gate insulating film 5.
- a film thickness of about 2 nm is desirable.
- the gate electrode material is not limited to the Ni silicide film, but is a metal such as Ni, Co, Ti, W, Ta, Mo, Cr, Al, Pt, Pa, Ru, or a metal silicide film.
- any material may be used as long as the work function of the metal nitride film is approximately in the center of the forbidden band of the single crystal Si thin film.
- FIG. 27 is a cross-sectional view of a semiconductor device showing Example 3 of the third embodiment of the present invention.
- the semiconductor device is basically manufactured in accordance with the above-described embodiment.
- the threshold voltage values of the N conductivity type MISFET and the P conductivity type MISFET are set to desired values.
- a metal film such as TiN is applied. Specifically, after forming a 1.8 nm oxide film and nitriding the surface with NO gas to form a 0.2 nm nitride film on the main surface, a metal film such as TiN of about 5 to 20 nm is formed. Later, a polycrystalline Si film is deposited to form a gate electrode structure (FIG. 28).
- N and P conductivity type impurities may be implanted into the N conductivity type MISFET and the P conductivity type MISFET, respectively, by ion implantation, as in the conventional MISFET formation method.
- a polycrystalline Si film doped with the above impurities may be used.
- the difference from Example 1 is the film thickness when the Ni (nickel) film is changed to the nickel silicide film 20 in the step of FIG.
- the polycrystalline Si film of the gate electrode is entirely made of nickel silicide, whereas in the case of this example, the polycrystalline Si film of the gate electrode is not necessarily made of nickel silicide.
- the thickness may be about 20 nm.
- the gate insulating film is a rare earth oxide film such as Al, Zr, Hf, Y, La or a rare earth silicate film, or a rare earth oxide such as Zr, Hf, Y, La formed on the Al oxide film and the Al oxide film. There is no problem even if a laminated film of a material film or a rare earth silicate film is used.
- the metal film used for setting the threshold voltage value to a desired value is not limited to TiN, and the work function of a metal such as Ti or TaN or a metal nitride film is a forbidden band of a single crystal Si thin film. Any material can be used as long as it is located at the center of the center.
- the gate electrode 20 is composed of a metal nitride film such as TiN.
- the threshold voltage value can be set to almost 0 V in both the N conductivity type MISFET and the P conductivity type MISFET, regardless of the fully depleted type SOIIGFET.
- the single crystal Si thin film 3 constituting the channel is finally formed to be as thin as 10 nm, the source and drain regions have a stacked structure, and most of the stacked structure is the metal silicide film 20. Therefore, it was possible to solve the problem of increase in contact resistance between the semiconductor and the metal silicide film and increase in series resistance.
- an ion implantation process for reducing the parasitic capacitance of the source and drain diffusion layer regions in the SOI MISFET region and the resistance of the source and drain diffusion layer regions in the bulk MISFET region are reduced.
- the ion implantation process for the common process under the same conditions, it is possible to realize a large drive current for the SOI type MISFET and at the same time to reduce the bottom parasitic capacitance of the well diffusion layers 6 and 7. .
- the parasitic capacitance can be reduced by about one digit even in the same well occupation area configuration as compared with the well structure in the case where ion implantation for reducing the capacitance is not performed.
- the connection region can be set regardless of the upper wiring. As a result, a large current and high driving capability of the semiconductor device can be realized.
- the diffusion layer regions of the N conduction type MISFET region and the P conduction type MISFET region are formed. While being shared, the well diffusion layer to which the substrate potential was applied could be separated by the STI layer.
- the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region and the well diffusion layer to which the substrate potential is applied are separated by STI. Therefore, according to the present invention, it is possible to reduce at least the minimum pitch and the area corresponding to one pitch at each technology node for manufacturing a semiconductor element.
- FIG. 33 is a sectional view of a semiconductor device showing a fourth embodiment example 4 according to the present invention.
- the structure of the element isolation layer 27 having a height different from that of the STI element isolation layer 2 formed in the area where the diffusion layer areas of the N conductivity type MISFET region and the P conductivity type MISFET region are made common is described above. It is characterized by being different from Example 1. The manufacturing process will be described with reference to FIG.
- the semiconductor device is manufactured up to FIGS. From this state, Si films 52 and 53 with a thickness of, for example, 60 nm were selectively deposited on the exposed single crystal Si region by using the selective epitaxial method. (FIG. 30).
- the STI element isolation layer 2 is etched to expose the Si layers on the side surfaces of the diffusion layer regions of the N-conducting MISFET region and the P-conducting MISFET region, and the single-crystal Si layer is formed using the selective epitaxial method. Grow.
- the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region are connected by utilizing the lateral growth of the Si layer by the conventionally known ELO (Epitaxial Lateral Overgrowth).
- the process is further simplified than in the first embodiment, and the semiconductor device is manufactured. Can be produced. The process can be simplified.
- impurity implantation of N conductivity type and P conductivity type is performed by using the ion implantation method in the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region formed by using the selective epitaxial method.
- the silicon nitride film 37 is selectively removed with hot phosphoric acid (FIG. 31), the silicon gate polycrystalline Si film 38 is exposed, and then a 30 nm thick Ni (nickel) film is formed by sputtering.
- the entire area of the exposed gate electrode and at least the upper area of the N-conductivity type and P-type high concentration accumulation area are selectively silicided by heat treatment at 450 ° C.
- Metal silicide source / drain region 20 Metal silicide source / drain region 20.
- the silicon gate electrode to which no impurities were added was converted into a nickel silicide film up to the region in contact with the gate insulating film, and the resistance was reduced.
- the stacked Si film on the source / drain diffusion layer is not entirely silicided, and a low-resistance polycrystalline Si film is left in the bottom region, and the very shallow N conductivity type source / drain diffusion layer 8 in the thin single crystal Si is left. , 9 and the shallow P-conductivity type source / drain diffusion layers 10, 11 were preserved.
- the silicidation treatment only the unreacted Ni film on the insulating film was selectively removed with an etching solution using a mixed aqueous solution of hydrochloric acid and hydrogen peroxide (FIG. 32).
- a wiring interlayer insulating film was deposited and planarized and polished, and a wiring process including the wiring interlayer insulating film 31 was performed, and a semiconductor device was manufactured through a second wiring process (FIG. 33).
- the gate electrode 20 was composed of a metal silicide film.
- the threshold voltage value can be set to almost 0 V in both the N conductivity type MISFET and the P conductivity type MISFET, regardless of the fully depleted type SOIIGFET.
- the single crystal Si thin film 3 constituting the channel is finally formed to be as thin as 10 nm, the source and drain regions have a stacked structure, and most of the stacked structure is the metal silicide film 20. Therefore, it was possible to solve the problem of increase in contact resistance between the semiconductor and the metal silicide film and increase in series resistance.
- an ion implantation process for reducing the parasitic capacitance of the source and drain diffusion layer regions in the SOI MISFET region and the resistance of the source and drain diffusion layer regions in the bulk MISFET region are reduced.
- the ion implantation process for the common process under the same conditions, it is possible to realize a large drive current for the SOI type MISFET and at the same time to reduce the bottom parasitic capacitance of the well diffusion layers 6 and 7. .
- the parasitic capacitance can be reduced by about one digit even in the same well occupation area configuration as compared with the well structure in the case where ion implantation for reducing the capacitance is not performed.
- the connection region can be set regardless of the upper wiring. As a result, a large current and high driving capability of the semiconductor device can be realized.
- the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region are formed. While being shared, the well diffusion layer to which the substrate potential was applied could be separated by the STI layer.
- the diffusion layer region of the N conductivity type MISFET region and the P conductivity type MISFET region and the well diffusion layer to which the substrate potential is applied are separated by STI.
- the present invention it is possible to reduce at least a minimum pitch and an area corresponding to one pitch at each technology node for manufacturing a semiconductor element. Further, the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region which become the output part of the CMISFET are made common and directly connected by metal silicide. For this reason, the wiring resistance can be reduced as compared with the conventional case where the wiring connection hole metal / wiring is used. As described above, in the SOI type MISFET having low power consumption and high speed operation, the element area of the transistor can be reduced.
- the thin buried insulating film 4 be as thin as possible within the range where the leakage current is negligible, and it is preferably 10 nm or less, more preferably about the same as the gate insulating film 5.
- a film thickness of about 2 nm is desirable.
- the gate electrode material is not limited to the Ni silicide film, but is a metal such as Ni, Co, Ti, W, Ta, Mo, Cr, Al, Pt, Pa, Ru, or a metal silicide film.
- any material may be used as long as the work function of the metal nitride film is approximately in the center of the forbidden band of the single crystal Si thin film.
- FIG. 34 shows a static memory (SRAM) memory cell circuit using the present invention. In this embodiment, one memory cell is composed of four transistors. In FIG.
- Driving transistors 65 and 66 are storage nodes for storing data
- WL is a word line
- BL and BLB are bit lines
- Vss is an “L” power supply line.
- the transfer transistor 61 is in a state where a forward bias is applied because the back gate is “L”, and Vth is lowered. Therefore, a leakage current flows from the bit line BL to the storage node 65 through the transfer transistor 61, and the “H” potential of the storage node is maintained. Since the back gate of the driving transistor 63 has the same potential as the source electrode, Vth does not change and the leakage current is small, so that the “H” level of the storage node 65 is maintained. Since the drive transistor 64 is in a state where the back gate potential is “H” and the forward bias is applied, Vth is lowered and the “L” level of the storage node 66 can be held strongly.
- this memory cell is a memory cell that is stable and has a small leakage current that flows unnecessarily.
- FIG. 35 The layout of this memory cell is shown in FIG. In FIG. 35, 71 is a contact, 72 is a gate electrode, 73 is a diffusion layer, 61 and 62 are transfer transistors, 63 and 64 are drive transistors, and a dotted line represents one memory cell.
- FIG. 36 shows a memory cell layout showing gate electrodes, contacts, and well layers.
- 67 is a well layer.
- the wells of the transfer transistor 61 and the drive transistor 63, and the transfer transistor 62 and the drive transistor 64 are integrally formed and connected to the storage node. In this memory cell, the wells of the transfer transistor 62 and the drive transistor 64 are integrally formed.
- FIG. 37 shows a layout diagram of the diffusion layer regions of the N conductivity type MISFET region and the P conductivity type MISFET region of this memory cell.
- the N conductivity type MISFET region 69 and the diffusion layer region 68 of the P conductivity type MISFET region are shared by the element isolation region (STI).
- STI element isolation region
- Example 6> 38 and 39 show an SRAM memory cell circuit using the present invention and a layout diagram thereof.
- BL and BLB are bit lines
- WL is a word line
- Vdd is a power supply line
- Vss is a ground potential line
- 81 and 82 are transfer transistors for accessing the memory cells
- 83 and 84 are memory cell data.
- Drive transistors for driving the storage node to hold data load transistors 85 and 86 for supplying charges for holding memory cell data, and reference numerals 87 and 88 for storage data.
- the layout of the SRAM memory cell according to the present invention is different from the layout of the conventional SRAM memory cell shown in FIG.
- the diffusion layer regions 84 and 85 are separated by using the present invention as shown in FIG. It is shared without being separated by STI) (region 75 in FIG. 39). This region is directly connected by metal silicide. Therefore, the wiring resistance of the memory cell can be reduced as compared with the conventional case where the wiring connection hole metal / wiring is used. As a result, it is possible to improve each performance such as speeding up the writing time of the memory cell.
- P-type high concentration ultra-thin source diffusion layer 16 P-type high concentration ultra-thin drain diffusion layer, 20 ... Metal silicide gate electrode, 21 ... Semiconductor with stacked source and drain, 25, 26 ... threshold voltage control diffusion layer, 30: Metal wire for connection hole, 31 ... Insulation film of wiring layer building, 35 ... resist mask, 36 ... silicon oxide film, 37 ... silicon nitride film, 38 ... polycrystalline silicon film, 39 ... thick silicon oxide film, 40: Gate wiring connection hole, 42 ... diffusion layer wiring connection hole, 52, 53 ... Stacked Si layers, 61 ... Transfer transistor, 63, 64 ... driving transistor, 85, 86 ... load transistors, 65, 66, 87, 88 ...
- Gate electrode 100 ... N-type MISFET region, 200 ... P-type MISFET region, WL ... word line, BL, BLB ... bit lines, Vdd: power line, Vss: Ground potential line.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Thin Film Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
- Element Separation (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Semiconductor Memories (AREA)
Abstract
Description
また、通常基板に作製したMISFETの場合、上述した短チャネル効果の問題があるが、完全空乏型SOI-MISFETの場合は酸化膜で基板と素子が分離されており、空乏層が広がることがないため、完全空乏型SOI-MISFETでは、基板濃度を低くすることができる。従って、不純物散乱の増大に伴うキャリアの移動度の低下が抑制されるため、高駆動電流化を図ることができる。
上述のごとく、SOI型MISFETは、低消費電力・高速という優れた特徴を有している。
また、以下の実施例において、要素の数等(個数、数値、量、範囲等を含む)に言及する場合、特に明示した場合および原理的に明らかに特定の数に限定される場合を除き、その特定の数に限定されるものではなく、特定の数以上でも以下でも良い。
<実施例1>
図1に、本発明の第一の実施例1の形態に係るMISFETの完成断面図である。また、その製造工程を、図7以降を用いて説明する。説明の都合上半導体基板、及び半導体膜の導電型を固定して説明するが導電型の組み合わせは任意でよく、本実施例記載の導電型に限定されない。面方位(100)、P導電型、抵抗率10ohm・cm、直径20cmの単結晶Siよりなり、主表面が鏡面研磨された半導体基板1に10nm厚のシリコン酸化膜4を形成して第一の半導体基板とした。上記第一の基板に公知の超薄膜SOI基板の製造法に基づき水素のイオン注入を実施した。注入量は5x1016/cm2とした。イオン注入の結果、単結晶Si基板主表面からおよそ40nmの深さの半導体Si薄膜3中に結晶欠陥層が形成された。
この状態より、配線層間絶縁膜の堆積と平坦化研磨、及び配線層間絶縁膜31を含む配線工程等を実施し、更に第二の配線工程を経て半導体装置を製造した(図24)。
更に、従来STI構造を改良することにより、図2および図3に示す通り、低消費電力性・高速性に優れるSOI型MISFETにおいて、N導電型MISFET領域とP導電型MISFET領域の拡散層領域を共通化する一方、基板電位を印加するウエル拡散層は、STI層によって分離させることができた。従来技術では、図4~6に示す通り、N導電型MISFET領域とP導電型MISFET領域の拡散層領域、基板電位を印加するウエル拡散層は、STIにより分離されていた。従って、本発明により、少なくとも半導体素子を作製する各々技術ノードにおける最小ピッチ、1ピッチ分の面積を低減することができる。更に、CMISFETの出力部となる上記N導電型MISFET領域とP導電型MISFET領域の拡散層領域は共通化され、珪化金属にて直接接続されている。そのため、従来のような配線接続孔金属・配線にて接続させるよりも、配線抵抗を低減することが出来る。このように、低消費電力・高速動作を有するSOI型MISFETにおいて、トランジスタの素子面積の縮小を実現することが出来た。
本実施例に基づく半導体装置において、薄い埋め込み絶縁膜4としては漏洩電流が無視できる膜厚範囲内で可能な限り薄膜化されることが望ましく、10nm以下更に好ましくはゲート絶縁膜5と同程度の2nm程度の膜厚であることが望ましい。
<実施例2>
図25は本発明による第5の実施の形態実施例2を示した半導体装置の断面図である。本実施例においては基本的に前記実施例に準じて半導体装置を製造したが、図25に示した通り、ソース・ドレイン上に積み上げられた拡散層領域21の方が、ゲート電極20よりも高く形成されていることを特徴とする。これは、第1の実施例1の図16のゲート電極を形成する工程において、堆積するシリコンゲート多結晶Si膜38およびシリコン窒化膜37の膜厚比を変えることにより実現される(図26)。ここで、本発明に置いては、ゲート電極20は、全領域を珪化させて、珪化ゲート電極にする必要がある。
このように、本実施例を適用することで、より良品歩留まりの良い半導体装置の製造方法を提供することが出来る。
<実施例3>
図27は本発明による第3の実施の形態実施例3を示した半導体装置の断面図である。本実施例においては基本的に前記実施例に準じて半導体装置を製造したが、第3の実施例3では、N導電型MISFETとP導電型MISFETの閾電圧値を所望の値に設定するために、TiN等の金属膜を適用していることを特徴とする。具体的には、酸化膜1.8nmの形成とその表面をNOガスにより窒化することにより0.2nmの窒化膜を主表面に積層形成後、5~20nm程度のTiN等の金属膜を形成した後に、多結晶Si膜を堆積して、ゲート電極構造とする(図28)。多結晶Si膜は、従来のMISFET形成方法と同様、イオン注入によって、N導電型MISFETとP導電型MISFETに各々、NおよびP導電型の不純物を注入しても良いし、NおよびP導電型の不純物がドーピングされた多結晶Si膜を用いても良い。ゲート電極形成後は、実施例1と同様の工程を経ることで、半導体装置が製造される。
ゲート絶縁膜は、Al,Zr,Hf,Y,Laなどの希土類酸化物膜又は希土類シリケート膜、もしくは、Al酸化膜とAl酸化膜上に形成されるZr,Hf,Y,Laなどの希土類酸化物膜又は希土類シリケート膜の積層膜を用いても何ら問題ない。また、閾電圧値を所望の値にするために用いる金属膜は、TiNに限定されることなく、Ti、TaN等の金属、又は金属窒化膜のうちその仕事関数が単結晶Si薄膜の禁制帯のほぼ中央に位置する材料であれば良い。
<実施例4>
図33は、本発明による第5の実施の形態実施例4を示した半導体装置の断面図である。本実施例では、N導電型MISFET領域とP導電型MISFET領域の拡散層領域を共通化する領域に形成されるSTI素子分離層2とは高さの異なる素子分離層27の構造が、前記実施例1とは異なることを特徴とする。その製造工程を、図29以降を用いて説明する。
<実施例5>
図34に本発明を用いたスタティックメモリ(SRAM)メモリセル回路を示す。本実施例では、1つのメモリセルが4つのトランジスタで構成されている。図34において、61および62はビット線から記憶ノードにアクセスする機能と記憶ノードを“H”にチャージするための機能を兼ね備えた転送トランジスタ、63および64は“L”の記憶ノードを駆動するための駆動トランジスタ、65および66はデータを記憶するための記憶ノード、WLはワード線、BLおよびBLBはビット線、Vssは“L”の電源線である。本回路で、記憶ノード65に“H”のデータを記憶ノード66に“L”のデータを記憶している場合のデータ保持動作について説明する。データ保持動作中は、ワード線WL、ビット線BLおよびBLBはすべて“H”電位に駆動されている。転送トランジスタ61はバックゲートが“L”となっているためフォワードバイアスが印加された状態となっており、Vthが低下している。このため、転送トランジスタ61を通してビット線BLから記憶ノード65にリーク電流が流れ記憶ノードの“H”電位が維持される。駆動トランジスタ63のバックゲートはソース電極と等しい電位となっているため、Vthは変化しておらずリーク電流も少ないため記憶ノード65の“H”レベルが保たれる。駆動トランジスタ64はバックゲート電位が“H”の電位となりフォワードバイアスが印加された状態となるためVthが低下し、記憶ノード66の"L"レベルを強く保持できる。転送トランジスタ62のバックゲートは“H”レベルとなるためリーク電流が少なく記憶ノード66の“L”レベルに与える影響は少ない。このように本メモリセルは安定でありかつ不必要に流れるリーク電流が少ないメモリセルとなっている。
<実施例6>
図38および図39に、本発明を用いたSRAMメモリセル回路、および、そのレイアウト図を示す。図38において、BLおよびBLBはビット線、WLはワード線、Vddは電源線、Vssは接地電位線、81および82はメモリセルにアクセスするための転送トランジスタ、83および84はメモリセルのデータを保持するために記憶ノードを駆動する駆動トランジスタ、85および86はメモリセルデータを保持するために電荷を供給する負荷トランジスタ、87および88はデータを記憶するための記憶ノードを示している。本発明によるSRAMメモリセルのレイアウトが、図40に示す従来SRAMメモリセルのレイアウトと異なるのは、例えば拡散層領域84および85が、図39に示す通り、本発明を用いて、素子分離領域(STI)で分離されることなく共通化されている(図39中75の領域)。この領域は、珪化金属にて直接接続されている。そのため、従来のような配線接続孔金属・配線にて接続させるよりも、メモリセルの配線抵抗を低減することが出来る。その結果、メモリセルの書き込み時間も高速化等、各性能を向上させることが可能となる。
2…素子間分離絶縁膜、
3…単結晶半導体薄膜、
4…埋め込み酸化膜、
5…ゲート絶縁膜、
6…N型ウエル拡散層、
7…N型ウエル拡散層、
8…N型高濃度極薄ソース拡散層、
9…N型高濃度極薄ドレイン拡散層、
10…P型高濃度極薄ソース拡散層、
11…P型高濃度極薄ドレイン拡散層、
12…ゲート側壁絶縁膜、
13…N型高濃度極薄ソース拡散層、
14…N型高濃度極薄ドレイン拡散層、
15…P型高濃度極薄ソース拡散層、
16…P型高濃度極薄ドレイン拡散層、
20…金属珪化膜物ゲート電極、
21…ソース,ドレイン積上げ半導体、
25,26…閾電圧制御拡散層、
30…配線接続孔金属、
31…配線層館絶縁膜、
35…レジストマスク、
36…シリコン酸化膜、
37…シリコン窒化膜、
38…多結晶シリコン膜、
39…厚いシリコン酸化膜、
40…ゲート配線接続孔、
42…拡散層配線接続孔、
52,53…積み上げSi層、
61…転送トランジスタ、
63,64…駆動トランジスタ、
85,86…負荷トランジスタ、
65,66,87,88…メモリセル内のデータ記憶ノード、
72…ゲート電極、
100…N型MISFET領域、
200…P型MISFET領域、
WL…ワード線、
BL,BLB…ビット線、
Vdd…電源線、
Vss…接地電位線。
Claims (21)
- 半導体支持基板上に設けられた第1の半導体素子および第2の半導体素子を有し、
前記第1の半導体素子は、
前記半導体支持基板に設けられた第1の導電型を有する第1の半導体層と、
前記第1の半導体層上に埋め込み絶縁体薄膜を介して設けられた単結晶半導体薄膜と、
前記半導体層中に設けられた前記第1の導電型と逆導電型の第2の導電型を有する第1のソース領域および第1のドレイン領域と、
前記第1のソース領域と前記第1のドレイン領域との間にそれぞれの領域と接するように設けられた第1のチャネル領域と、
前記第1のチャネル領域上に設けられた第1のゲート絶縁膜を介して設けられた第1のゲート電極とを備え、
前記第2の半導体素子は、
前記半導体支持基板に設けられた前記第2の導電型を有する第2の半導体層と、
前記第2の半導体層上に埋め込み絶縁体薄膜を介して設けられた単結晶半導体薄膜と、
前記単結晶半導体薄膜中に設けられた前記第1の導電型を有する第2のソース領域および第2のドレイン領域と、
前記第2のソース領域と前記第2のドレイン領域との間にそれぞれの領域と接するように設けられた第2のチャネル領域と、
前記第2のチャネル領域上に設けられた第2のゲート絶縁膜を介して設けられた第2のゲート電極とを備え、
前記埋め込み絶縁体薄膜と接して前記第1の半導体層に設けられた前記第1導電型を有する第1の不純物領域と、前記埋め込み絶縁体薄膜と接して前記第2の半導体層に設けられた前記第2導電型を有する第2の不純物領域とが、素子分離層により電気的に分離され、
前記第1のソース領域と前記第2のドレイン領域、又は前記第1のドレイン領域と前記第2のソース領域は、互いに該領域の一端と接して前記単結晶半導体薄膜中に設けられ、かつ前記単結晶半導体薄膜上に設けられた導電体層により電気的に接続されていることを特徴とする半導体装置。 - 前記単結晶半導体薄膜を介して設けられた前記導電体層と電気的接続されたコンタクト層が、前記素子分離層の上方に、前記導電体層上の層間絶縁層を貫通して設けた貫通孔に設けられていることを特徴とする請求項1記載の半導体装置。
- 前記埋め込み絶縁体薄膜の厚さが20nm以下であり、前記単結晶半導体薄膜の厚さが20nm以下であることを特徴とする請求項1記載の半導体装置。
- 前記第1のゲート電極及び前記第2のゲート電極は、Ni、Co、Ti、W、Ta、Mo、Cr、Al、Pt、Pa、Ru、又はこれらの珪化膜、或いは窒化膜のいずれかまたはそれらの組み合わせで構成されていることを特徴とする請求項1記載の半導体装置。
- 前記第1の不純物領域は、電圧供給源と電気的に接続されていることを特徴とする請求項1記載の半導体装置。
- 前記第2の不純物領域は、電圧供給源と電気的に接続されていることを特徴とする請求項1記載の半導体装置。
- 前記第1の不純物領域の不純物濃度は、前記第1の半導体層の不純物濃度より高いことを特徴とする請求項1記載の半導体装置。
- 前記第2の不純物領域の不純物濃度は、前記第2の半導体層の不純物濃度より高いことを特徴とする請求項1記載の半導体装置。
- 半導体支持基板と、該半導体支持基板上に形成された埋め込み絶縁体薄膜と、該埋め込み絶縁体薄膜上に形成された単結晶半導体薄膜とから構成されたSOI基板を準備する工程と、
第1の素子形成予定領域と第2の素子形成予定領域とを分離する溝を前記SOI基板上に選択的に形成する工程と、
前記溝中にシリコン酸化膜を埋め込むことにより素子分離層を形成する工程と、
前記半導体支持基板中の前記第1の素子形成予定領域に第1の導電型を有する第1のウエル拡散層と、前記第2の素子形成予定領域に前記第1の導電型と逆の導電型の第2の導電型を有する第2のウエル拡散層を形成する工程と、
前記第1および前記第2の素子形成予定領域の所定の位置に第1および第2のゲート電極を形成する工程と、
前記第1および第2のゲート電極を不純物導入のマスクとして、前記第1および第2のゲート電極周辺の前記単結晶半導体薄膜に前記第2および第1の導電型を有する不純物を導入し、それぞれ第1のソース層/ドレイン層と、第2のソース層/ドレイン層を形成する工程と、
前記第1のソース層および前記第2のドレイン層又は前記第2のソース層および前記第1のドレイン層を電気的に接続する導電層を形成する工程とを有することを特徴とする半導体装置の製造方法。 - 前記素子分離層の上端部を前記単結晶半導体薄膜の表面より前記半導体支持基板側に凹むようにエッチングし、第1のソース層/ドレイン層と第2のソース層/ドレイン層の一端面を露出させる工程と、
第1のソース層/ドレイン層および前記第2のソース層/ドレイン層の表面、前記素子分離層の表面、露出した前記第1のソース層/ドレイン層および前記第2のソース層/ドレイン層の一端面のそれぞれを覆うように、選択エピタキシャル成長を行う工程と、
前記選択エピタキシャル成長した領域表面に金属を堆積し、その後、熱処理を施すことによりシリサイド層を形成し、前記第1のソース層および前記第2のドレイン層又は前記第2のソース層および前記第1のドレイン層を電気的に接続する導電層を形成する工程とを有することを特徴とする請求項9記載の半導体装置の製造方法。 - 前記第1のゲート電極及び前記第2のゲート電極は、Ni、Co、Ti、W、Ta、Mo、Cr、Al、Pt、Pa、Ru、又はこれらの珪化膜、或いは窒化膜で構成されていることを特徴とする請求項9記載の半導体装置の製造方法。
- 前記第1および第2のゲート電極の下面よりも高くなるまで、前記選択エピタキシャル成長を行うことを特徴とする請求項9記載の半導体装置の製造方法。
- 前記第1のゲート電極及び前記第2のゲート電極は、TiN、TaN等の金属又はこれらの珪化膜、或いは窒化膜のいずれかまたはそれらの組み合わせで構成されていることを特徴とする請求項9記載の半導体装置の製造方法。
- データを保持するための一対の記憶ノードと、
一対の転送トランジスタおよび一対の駆動トランジスタとを有するスタティック型メモリセルを備え、
前記一対の駆動トランジスタは、請求項1に記載の半導体素子で構成され、
前記一対の駆動トランジスタのそれぞれのソース電極が、接地電位線に接続され、前記駆動トランジスタのそれぞれを構成する埋め込み絶縁体薄膜の下に設けられた半導体層が、前記駆動トランジスタのそれぞれのゲート電極に接続されていることを特徴とする半導体記憶装置。 - 前記埋め込み絶縁体薄膜下に設けられた前記半導体層が前記ゲート電極の下に設けられたコンタクト層によって前記ゲート電極と接続されることを特徴とする請求項14記載の半導体記憶装置。
- 前記スタティック型メモリセルは、メモリにアクセスするためのビット線と記憶ノード間に接続される1対の転送トランジスタと、接地電位線にソース電極が接続されている1対のnチャネル型駆動トランジスタの4つのトランジスタで構成される請求項15記載の半導体記憶装置。
- 前記転送トランジスタはpチャネル型トランジスタで構成される請求項16記載の半導体記憶装置。
- データを保持するための第1および第2の記憶ノードと、
一対の転送トランジスタ、一対の駆動トランジスタ、および一対の負荷トランジスタとを有するスタティック型メモリセルを備え、
前記一対の転送トランジスタ、駆動トランジスタおよび負荷トランジスタは、請求項1に記載の半導体素子で構成され、
前記一対の転送トランジスタは、前記第1の記憶ノードにソース電極が接続された第1の転送トランジスタと、前記第2の記憶ノードにソース電極が接続された第2の転送トランジスタとを有し、
前記一対の駆動トランジスタは、前記第1の記憶ノードにドレイン電極が接続された第
1の駆動トランジスタと、前記第2の記憶ノードにドレイン電極が接続された第2の駆動トランジスタとを有し、
前記第1の転送トランジスタを構成する埋め込み絶縁体薄膜下に設けられた第1の半導体層は前記第2の記憶ノードに接続され、前記第2の転送トランジスタの埋め込み絶縁体薄膜下に設けられた第2の半導体層は前記第1の記憶ノードに接続されていることを特徴とする半導体記憶装置。 - 前記スタティック型メモリセルにおいて、前記第1の転送トランジスタと前記第1の駆動トランジスタのウエルノードが、前記第1の半導体層に一体化して設けられ、前記第2の転送トランジスタと前記第2の駆動トランジスタのウエルノードが、前記第2の半導体層に一体化して設けられていることを特徴とする請求項18記載の半導体記憶装置。
- 前記スタティック型メモリセルにおいて、
前記第1の転送トランジスタと前記第1の駆動トランジスタのウエルノードは、前記第1の駆動トランジスタのゲート電極と金属配線を接続するコンタクトの下に設けられたコンタクトによって前記第1の駆動トランジスタのゲート電極と接続され、
前記第2の転送トランジスタと前記第2の駆動トランジスタのウエルノードは前記第2の駆動トランジスタのゲート電極と金属配線を接続するコンタクトの下に設けられたコンタクトによって前記第2の駆動トランジスタのゲート電極と接続されていることを特徴とする請求項18記載の半導体記憶装置。 - 前記スタティック型メモリセルが設けられた半導体支持基板上に混載された論理回路を有し、
前記論理回路を構成するトランジスタにおいて、前記ゲート電極と前記埋め込み絶縁体薄膜下のウエルノードとが接続されていることを特徴とする請求項15記載の半導体記憶装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/145,108 US8643117B2 (en) | 2009-01-19 | 2010-01-18 | Semiconductor device, method for manufacturing same, and semiconductor storage device |
JP2010546603A JP5364108B2 (ja) | 2009-01-19 | 2010-01-18 | 半導体装置の製造方法 |
KR1020117016715A KR101287733B1 (ko) | 2009-01-19 | 2010-01-18 | 반도체 장치 및 그 제조 방법과 반도체 기억 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-008850 | 2009-01-19 | ||
JP2009008850 | 2009-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010082504A1 true WO2010082504A1 (ja) | 2010-07-22 |
Family
ID=42339757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/000236 WO2010082504A1 (ja) | 2009-01-19 | 2010-01-18 | 半導体装置およびその製造方法、並びに半導体記憶装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8643117B2 (ja) |
JP (1) | JP5364108B2 (ja) |
KR (1) | KR101287733B1 (ja) |
WO (1) | WO2010082504A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012161859A1 (en) * | 2011-05-24 | 2012-11-29 | International Business Machines Corporation | Improved structure for cmos etsoi with multiple threshold voltages and active well bias capability |
KR20130011995A (ko) | 2011-07-22 | 2013-01-30 | 르네사스 일렉트로닉스 가부시키가이샤 | 반도체 장치 |
JPWO2019097568A1 (ja) * | 2017-11-14 | 2020-10-22 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013182991A (ja) * | 2012-03-01 | 2013-09-12 | Renesas Electronics Corp | 半導体集積回路装置の製造方法 |
FR2999802A1 (fr) | 2012-12-14 | 2014-06-20 | St Microelectronics Sa | Cellule cmos realisee dans une technologie fd soi |
US9263349B2 (en) * | 2013-11-08 | 2016-02-16 | Globalfoundries Inc. | Printing minimum width semiconductor features at non-minimum pitch and resulting device |
US9349719B2 (en) * | 2014-09-11 | 2016-05-24 | Taiwan Semiconductor Manufacturing Company Limited | Semiconductor device |
KR102495516B1 (ko) * | 2018-05-08 | 2023-02-02 | 삼성전자주식회사 | 반도체 장치 및 그 제조 방법 |
FR3137209A1 (fr) * | 2022-06-22 | 2023-12-29 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Dispositif microélectronique à deux transistors à effet de champ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003078141A (ja) * | 2001-09-05 | 2003-03-14 | Sharp Corp | 半導体装置及びその製造方法と携帯電子機器 |
WO2007004535A1 (ja) * | 2005-07-05 | 2007-01-11 | Renesas Technology Corp. | 半導体装置およびその製造方法 |
JP2008288269A (ja) * | 2007-05-15 | 2008-11-27 | Mitsubishi Electric Corp | 薄膜トランジスタアレイ基板、その製造方法、及び表示装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5693975A (en) * | 1995-10-05 | 1997-12-02 | Integrated Device Technology, Inc. | Compact P-channel/N-channel transistor structure |
JP2000208770A (ja) | 1999-01-08 | 2000-07-28 | Toshiba Corp | 半導体装置及びその製造方法 |
JP5149617B2 (ja) * | 2004-04-01 | 2013-02-20 | エーアールエム リミテッド | 改良されたレイアウトのsramメモリセル |
-
2010
- 2010-01-18 WO PCT/JP2010/000236 patent/WO2010082504A1/ja active Application Filing
- 2010-01-18 US US13/145,108 patent/US8643117B2/en active Active
- 2010-01-18 JP JP2010546603A patent/JP5364108B2/ja active Active
- 2010-01-18 KR KR1020117016715A patent/KR101287733B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003078141A (ja) * | 2001-09-05 | 2003-03-14 | Sharp Corp | 半導体装置及びその製造方法と携帯電子機器 |
WO2007004535A1 (ja) * | 2005-07-05 | 2007-01-11 | Renesas Technology Corp. | 半導体装置およびその製造方法 |
JP2008288269A (ja) * | 2007-05-15 | 2008-11-27 | Mitsubishi Electric Corp | 薄膜トランジスタアレイ基板、その製造方法、及び表示装置 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012161859A1 (en) * | 2011-05-24 | 2012-11-29 | International Business Machines Corporation | Improved structure for cmos etsoi with multiple threshold voltages and active well bias capability |
US8552500B2 (en) | 2011-05-24 | 2013-10-08 | International Business Machines Corporation | Structure for CMOS ETSOI with multiple threshold voltages and active well bias capability |
CN103548140A (zh) * | 2011-05-24 | 2014-01-29 | 国际商业机器公司 | 具有多个阈值电压和有源阱偏置能力的cmos绝缘体上极薄硅的改进型结构 |
CN103548140B (zh) * | 2011-05-24 | 2016-04-13 | 国际商业机器公司 | 具有多个阈值电压和有源阱偏置能力的cmos绝缘体上极薄硅的改进型结构 |
KR20130011995A (ko) | 2011-07-22 | 2013-01-30 | 르네사스 일렉트로닉스 가부시키가이샤 | 반도체 장치 |
US9029951B2 (en) | 2011-07-22 | 2015-05-12 | Renesas Electronics Corporation | Semiconductor device having well regions with opposite conductivity |
US9142567B2 (en) | 2011-07-22 | 2015-09-22 | Renesas Electronics Corporation | SOI SRAM having well regions with opposite conductivity |
JPWO2019097568A1 (ja) * | 2017-11-14 | 2020-10-22 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
US20120018807A1 (en) | 2012-01-26 |
JP5364108B2 (ja) | 2013-12-11 |
KR101287733B1 (ko) | 2013-07-19 |
KR20110105826A (ko) | 2011-09-27 |
US8643117B2 (en) | 2014-02-04 |
JPWO2010082504A1 (ja) | 2012-07-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11695014B2 (en) | Semiconductor device and method for controlling semiconductor device | |
JP5364108B2 (ja) | 半導体装置の製造方法 | |
US8409936B2 (en) | Method for manufacturing a semiconductor device by forming portions thereof at the same time | |
JP4927321B2 (ja) | 半導体記憶装置 | |
US8629017B2 (en) | Structure and method to form EDRAM on SOI substrate | |
CN101160667B (zh) | 改进单元稳定性和性能的混合块soi 6t-sram单元 | |
JP4087107B2 (ja) | 半導体素子の薄膜トランジスタ製造方法 | |
US7323379B2 (en) | Fabrication process for increased capacitance in an embedded DRAM memory | |
US8624295B2 (en) | SRAM devices utilizing strained-channel transistors and methods of manufacture | |
JP5081394B2 (ja) | 半導体装置の製造方法 | |
JP2005251776A (ja) | 半導体装置とその製造方法 | |
US11894039B2 (en) | Fft-dram | |
US20080230838A1 (en) | Semiconductor memory device and manufacturing process therefore | |
JP6467472B2 (ja) | 半導体装置 | |
JP6203915B2 (ja) | 半導体装置 | |
JP2015164214A (ja) | 半導体装置および半導体装置の制御方法 | |
JP2009141296A (ja) | 半導体装置の駆動方法 |
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: 10731173 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2010546603 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20117016715 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13145108 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10731173 Country of ref document: EP Kind code of ref document: A1 |