WO2006046640A1 - ファイバーsoi基板及びこれを用いた半導体素子並びにその製造方法 - Google Patents
ファイバーsoi基板及びこれを用いた半導体素子並びにその製造方法 Download PDFInfo
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- WO2006046640A1 WO2006046640A1 PCT/JP2005/019779 JP2005019779W WO2006046640A1 WO 2006046640 A1 WO2006046640 A1 WO 2006046640A1 JP 2005019779 W JP2005019779 W JP 2005019779W WO 2006046640 A1 WO2006046640 A1 WO 2006046640A1
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- 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]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6758—Thin-film transistors [TFT] characterised by the insulating substrates
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- 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
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- 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
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- 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
- H10D86/80—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 characterised by multiple passive components, e.g. resistors, capacitors or inductors
- H10D86/85—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 characterised by multiple passive components, e.g. resistors, capacitors or inductors characterised by only passive components
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- 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
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
- H10P14/2901—Materials
- H10P14/2921—Materials being crystalline insulating materials
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- 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
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/29—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by the substrates
- H10P14/2924—Structures
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- 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
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/34—Deposited materials, e.g. layers
- H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
- H10P14/3404—Deposited materials, e.g. layers characterised by the chemical composition being Group IVA materials
- H10P14/3411—Silicon, silicon germanium or germanium
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- 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
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/38—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by treatments done after the formation of the materials
- H10P14/3802—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H10P14/3808—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams
- H10P14/3816—Pulsed laser beam
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- 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
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/04—Apparatus for manufacture or treatment
- H10P72/0402—Apparatus for fluid treatment
- H10P72/0418—Apparatus for fluid treatment for etching
- H10P72/0421—Apparatus for fluid treatment for etching for drying etching
Definitions
- the present invention relates to a fiber SOI substrate, a semiconductor element using the fiber SOI substrate, and a manufacturing method thereof, and more specifically, a fiber SOI substrate using quartz fiber, a semiconductor element formed using the fiber SOI substrate, and It relates to the manufacturing method.
- Microprocessors MPU (Micro Processing Unit)
- MCU microcontroller unit
- logic memory
- MOS Metal Oxide Semiconductor
- CMOS Complementary Metal Oxide Semiconductor
- the IC section has a relatively simple circuit configuration, but requires relatively large passive elements such as an antenna, inductance, and capacitance.
- SOI semiconductor on insulator
- MOS transistor characteristics excellent characteristics can be realized by using a fully depleted SO I (folly depleted SOI) substrate.
- SOI substrates for the disadvantages such as self-heating effect, substrate floating effect, device breakdown voltage, etc.
- Patent Document 1 high-speed logic circuits and DRAMs can be used. (dynamic random access memory) has been prototyped. Since the SOI substrate is an insulating substrate under the semiconductor layer, high-performance passive elements can be easily made on-chip.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-228206
- the problem with SOI substrates is the cost of substrate manufacture, which is currently more than an order of magnitude more expensive than wafers. This is because the SOI substrate manufacturing method goes through various steps to form an insulating substrate using a Si wafer. Therefore, a semiconductor device using an SOI substrate has the above-mentioned effectiveness, but it is difficult to put it to practical use.
- the object of the present invention is to form various MOS semiconductor devices, and moreover, composite devices of MOS integrated circuits and passive elements as compared with the conventional two-dimensional substrate, and reduce the size and manufacturing cost of the semiconductor device. The object is to provide a fiber SOI substrate, a semiconductor device using the same, and a method of manufacturing the same.
- a first aspect of the present invention for solving the above-described problem is a fiber having a fiber having a polygonal cross section and a semiconductor thin film crystallized after film formation on at least one surface of the fiber. It is an SOI substrate.
- a plurality of the semiconductor thin films are arranged on the surface of the fiber so as to extend in the linear direction of the fiber and at intervals in the width direction. It is characterized by being formed on the groove.
- a third aspect of the present invention is the fiber SOI substrate according to the first or second aspect, further comprising a thin film made of any one of an insulating material and a semiconductor formed between the fiber and the semiconductor thin film. It is characterized by having.
- an insulating film is formed on the semiconductor thin film.
- a fiber SOI substrate having a semiconductor thin film crystallized after being formed on a fiber having a polygonal cross section, and the semiconductor thin film on at least one surface of the fiber are formed.
- a sixth aspect of the present invention is characterized in that in the semiconductor element according to the fifth aspect, a circuit chip is connected to at least one surface of the fiber.
- the receiving element is at least one of an inductance and a capacitance.
- an eighth aspect of the present invention there is provided a step of forming an amorphous, microcrystalline, or polycrystalline semiconductor thin film on at least one surface of a fiber having a polygonal cross section, and the semiconductor thin film And a step of crystallizing the substrate by either heat or laser annealing.
- a ninth aspect of the present invention in the eighth aspect, before forming the semiconductor thin film, a plurality of grooves extending in the linear direction of the fiber and spaced apart in the width direction are formed in the fiber. It further has a step of forming on the surface.
- a tenth aspect of the present invention is a method for manufacturing a fiber SOI substrate according to the ninth aspect, wherein a plurality of initial grooves are formed in advance on the surface of a base material for forming the fiber; And forming the fiber by drawing the base material, and at the same time, narrowing the initial groove of the fiber to a predetermined width to form the groove of the fiber.
- the surface of the fiber having the groove is insulative. And a step of forming a thin film of semiconductor! /.
- a twelfth aspect of the present invention is the method for manufacturing a fiber SOI substrate according to any one of the eighth to eleventh aspects, wherein a silicon dioxide film is formed on the semiconductor film after crystallization of the semiconductor thin film.
- the method further includes the step of:
- the step of forming the silicon dioxide silicon film forms a thermal oxide film in a thermal oxidation furnace. Further, the process is characterized in that it is a process of continuously vapor-deposited silicon dioxide and annealing at a high temperature.
- a fourteenth aspect of the present invention provides a fiber SOI substrate having a semiconductor thin film crystallized after film formation on at least one surface of a fiber having a polygonal cross section, and at least one surface of the fiber SOI substrate A process for forming an active element on the semiconductor thin film, and a process for forming a passive element on either side of the fiber.
- a fifteenth aspect of the present invention is characterized in that the semiconductor device manufacturing method according to the fourteenth aspect further includes a step of connecting a circuit chip to at least one surface of the fiber SOI substrate.
- the first lead is formed in a state where a fiber SOI substrate having a semiconductor thin film on at least one surface of a fiber having a polygonal cross section is covered with a protective film.
- the first reel force is also bowed out of the fiber soi substrate, and after the processing for manufacturing the semiconductor element on the fiber SOI substrate in the region, the protective film,
- a method of manufacturing a semiconductor device comprising: winding a fiber SOI substrate covered with a protective film on a second reel.
- the protective film is a resist
- the treatment includes resist stripping, cleaning, drying, film formation, and resist coating. . It is characterized by at least one of pre-beta, exposure, development, and etching.
- a low-cost "one-dimensional" SOI substrate is possible by crystallization of a semiconductor thin film formed on a fiber having a polygonal cross-sectional shape. This makes it possible to form composite devices with active and passive elements, reducing the costs of SOI substrates, manufacturing processes, and manufacturing equipment.
- the “one-dimensional” SOI substrate is an SOI substrate having a sufficient length of, for example, 10 times or more compared to the cross-sectional dimensions such as width, thickness, and diameter.
- each surface of the fiber can be exposed and processed.
- the device size is reduced by the three-dimensional layout by using four sides of the fiber at the same time as the cost reduction of the MOS integrated circuit manufactured by these, and the composite device of the MOS integrated circuit and the passive element.
- FIG. 1A and FIG. 1B are a perspective view and a crystal showing a method of single crystallization by laser annealing crystallization of a Si film formed on a square fiber according to an embodiment of the present invention. It is a figure which shows the aspect of chemical conversion typically.
- FIG. 2A and FIG. 2B are characteristic diagrams showing the principle of crystallization from the melt phase applied to the embodiment of the present invention
- FIG. 2C is the present invention showing a method of applying this principle to a fiber. It is a block diagram of the apparatus which concerns on embodiment of this.
- FIG. 3A to FIG. 3C are diagrams illustrating the principle of graphephepitaxy.
- FIG. 4A shows a state in which a preform is drawn to form a fiber in the embodiment of the present invention.
- 4B is a perspective view showing a fiber according to an embodiment of the present invention having fine grooves on the surface
- FIGS. 4C and 4D are cross-sectional views showing fine grooves on the fiber surface according to the embodiment of the present invention.
- FIG. 4A shows a state in which a preform is drawn to form a fiber in the embodiment of the present invention.
- 4B is a perspective view showing a fiber according to an embodiment of the present invention having fine grooves on the surface
- FIGS. 4C and 4D are cross-sectional views showing fine grooves on the fiber surface according to the embodiment of the present invention.
- FIG. 4A shows a state in which a preform is drawn to form a fiber in the embodiment of the present invention.
- 4B is a perspective view showing a fiber according to an embodiment of the present invention having fine grooves on the surface
- FIGS. 4C and 4D are cross-
- FIG. 5A is a perspective view showing an example of a circuit configuration of an IC tag according to an embodiment of the present invention
- FIG. 5B is an example of a layout on a fiber of the IC tag.
- FIG. 6A is a flowchart of a process of forming a MOS transistor formed on the fiber SOI substrate according to the embodiment of the present invention
- FIG. 6B shows a process of forming the MOS transistor according to the embodiment of the present invention. It is sectional drawing.
- FIG. 7 is a diagram showing a process flow in which formation of a MOS transistor is divided by a reel-to-reel process using a fiber SOI substrate in the embodiment of the present invention.
- FIG. 8A and FIG. 8B are configuration diagrams showing the principle of an apparatus for realizing a reel-to-reel process in the embodiment of the present invention.
- FIG. 9A and FIG. 9B are diagrams showing the principles of the optical system and servo control system of the fiber substrate exposure apparatus used in the embodiment of the present invention.
- FIG. 10A to FIG. 10D are views showing a mode of exposure of four sides of a cross-sectional square fiber
- FIG. 11A and FIG. 11B are block diagrams showing the principle of the exposure optical system and the method for making the illumination light incoherent in the embodiment of the present invention.
- FIG. 12 is a table showing the process rate of each step in the embodiment of the present invention.
- FIG. 13 is a configuration diagram showing the principle of a thermal CVD apparatus used in an embodiment of the present invention.
- FIG. 14A is a block diagram showing the principle of a dry etching apparatus used in an embodiment of the present invention
- FIGS. 14B and 14C are cross-sectional views showing fibers and electrodes in the dry etching apparatus.
- FIG. 15A is a block diagram of a resist coating apparatus used in an embodiment of the present invention
- FIG. 15B is a block diagram of a wet process apparatus used in an embodiment of the present invention.
- differential exhaust chamber or dry peeling chamber or ashing chamber 3 process chamber
- the SOI substrate according to the embodiment of the present invention is, for example, the following three forms.
- a quartz fiber with a square or rectangular cross section, or a thin film of silicon nitride (Si N) as an insulating material or silicon carbide (SiC) as a semiconductor on the quartz fiber First, a quartz fiber with a square or rectangular cross section, or a thin film of silicon nitride (Si N) as an insulating material or silicon carbide (SiC) as a semiconductor on the quartz fiber.
- Si N silicon nitride
- SiC silicon carbide
- An amorphous, microcrystalline, or polycrystalline silicon (Si) thin film with a thickness of lOOnm or less is formed on at least a part of the surface on which the film is formed, or on one side of which the cross-sectional force is also seen, and this is formed by heat or laser annealing. Lateral growth crystallized in the fiber line direction.
- a fine groove having a spacing of several / zm or less in the linear direction of the quartz fiber is formed on at least a part of one or both sides of the quartz fiber having a square or rectangular cross section as viewed from the cross section.
- An amorphous, microcrystalline, or polycrystalline Si thin film with a thickness of lOOnm or less is formed on the surface on which the silicon nitride or silicon carbide thin film is formed, or on the surface, and this is heated or lasered. Lateral growth crystallization was performed in the fiber linear direction by annealing.
- a gate oxide film is formed over the entire surface of the SOI substrate by thermal oxidation. Depending on the thickness of the gate oxide film, a thermal oxide film is formed. Subsequently, silicon dioxide (SiO 2) was deposited at a high temperature.
- the following three modes can be applied as the semiconductor device structure using the above SOI substrate.
- the first structure is one or more MOS 'ICs on one side as seen from at least a part or cross-sectional surface of the quartz fiber, and any part of the quartz fiber, used in combination with the MOS' IC.
- Wiring and passive elements such as inductance and capacitance. This passive element can be formed on the same or different part as the MOS 'IC, or on the same side (surface) or other side (surface).
- passive elements such as wiring and inductance, capacitance, resistance, etc. are formed on the fiber, and another IC chip such as a Si wafer is loaded on this.
- a reel-to-reel method is proposed. This is a method for a single long fiber, and the starting point is a fiber wound on a reel, and this is a method in which one photolithography process is performed on a reel 'to' reel.
- the resist removal, washing, drying for example, film formation, resist coating, pre-beta, exposure, development, etching, washing Proceed with the photo process in order, stop before stripping the resist, wind it up on a reel, send it to the next process, and repeat the same process.
- Fig. 1A shows insulation made of silicon nitride or silicon carbide formed as a base film on the entire surface of a fiber 1 made of quartz with a square cross section used for a substrate or on a part of the surface of the fiber 1.
- a thermal CVD chemical vapor deposition
- SiCl silicon tetrachloride
- a polycrystalline silicon film 3 is formed, and an XeC less excimer laser 10 having a wavelength of 308 nm and a pulse width of 20 ns is uniformly irradiated onto a region 4 on one surface thereof to melt and crystallize the silicon film 3.
- the fiber 1 and the insulating thin film 2 and the silicon (semiconductor) film 3 on the fiber 1 constitute a fiber-one SOI substrate 5.
- the role of the silicon nitride or silicon carbide thin film 2 is to improve the wettability of the silicon melt in the crystallization process, resulting in passivation of the substrate Si crystal interface.
- the laser irradiation position is fixed, and the fiber 1 is moved in the longitudinal direction at a constant speed.
- the first region a is polycrystalline.
- the timing of laser pulse application is synchronized with the movement of the quartz fiber 1, and the laser is irradiated so that the laser is irradiated so that it overlaps the portion of the polycrystalline Si film 3 that has been crystallized slightly. Shoot. By repeating this operation several times, the regions b and C and the crystal grains become gradually larger, and finally a single crystal is formed as in the region d.
- Such a crystal growth method is the result of vigorous research on laser annealing from the late 1970s to the early 1980s, and is a well-known fact that US patent 96/07730 by James S. Im et al. (W097 / 45828) is disclosed as ACSLG (Artificially controlled super later al growth).
- the method of Im et al. Is to apply a slit excimer laser light as described above to a general “two-dimensional” substrate, and to increase the particle size. Is not controlled. In other words, with a normal two-dimensional substrate, the degree of freedom in the crystal growth direction increases as nucleation occurs, and it is very difficult to control this.
- a heat flow from the liquid phase to the solid phase is required for crystallization from the silicon melt. This situation is schematically illustrated in FIG. 2A.
- the temperature of the liquid phase In the vicinity of the solid-liquid interface, the temperature of the liquid phase must be below the melting point (Tm), that is, in a supercooled state.
- Tm melting point
- the temperature rise at the solid-liquid interface is due to the latent heat of the transition from the liquid phase to the solid phase.
- a sufficient temperature gradient must be formed in the solid phase to release the latent heat generated!
- the growth rate of the solid phase is a function of supercooling ( ⁇ ) as shown in the interface response function in FIG. 2B. This supercooling is determined by the amount of heat injected by the laser and the temperature gradient of the solid phase silicon film. These two factors determine the cooling rate, and the cooling rate and the crystal growth rate are logarithmically proportional.
- a "one-dimensional" substrate such as quartz fiber 1
- an arbitrary part of quartz fiber 1 as a substrate is formed by temperature controller 11 and temperature adjusting medium 12 such as a refrigerant as shown in FIG. 2C. Since the minute can be controlled to an arbitrary temperature with high accuracy, the temperature gradient, which is an external parameter of crystal growth, can be completely controlled along with the heat of laser injection. Therefore, when a “one-dimensional” substrate is used, this controllability makes the content essentially different from the Im et al. Patent.
- the width of the quartz fiber 1 considered for practical use is 200 ⁇ m or more. Growth of seed crystals of at least 200 m and length of at least several mm Need to grow.
- a groove forming method as shown in FIG. 4A, as shown in FIG. 4A, a base material 6 used at the time of drawing for forming a fiber 1 made of quartz is used.
- a similar refined groove 7 can be formed on the surface of the fiber 1 as shown in FIG. 4B. .
- the groove 7 has a width on the fiber surface where the base material 6 is drawn to a side of 0.3 mm. Is 3 ⁇ m.
- a groove 8a having a square cross section as shown in FIG. 4C or a groove 8b having a triangular cross section as shown in FIG. 4D can be formed.
- a base film of silicon nitride or silicon carbide is formed on the pattern of the groove 8 in some cases.
- the silicon thin film 3 is formed on the surface of the fiber 1 in which such a groove 7 is formed, and then the silicon thin film 3 is irradiated with a pulse laser as shown in FIG. It can be converted into a crystalline silicon thin film, which can be used as a fiber SOI substrate 5!
- the XeCl excimer laser 10 is used, but the same effect can be obtained by using a KrF excimer laser.
- the continuous wave YAG laser triple harmonic (wavelength 35 3nm) can be made panoramic with an EO modulator (electro-optic modulator).
- EO modulator electro-optic modulator
- the base material 6 shown in FIG. 4A is heated in a drawing furnace, placed on a capstan, drawn at a predetermined speed, and becomes a fiber 1. And in the area between the drawing furnace and A silicon film is formed on the surface of the fiber 1.
- a method for forming a silicon film there are a thermal CVD method as described later, a method of baking after applying silicon paste, a method of annealing after applying molten silicon, and the like.
- the fiber SOI substrate 5 is used as an IC tag as an example of an active-passive composite device in which the effect is remarkable in this embodiment.
- One example is described below.
- FIG. 5A is a block diagram of an example of an IC tag circuit.
- the smoothing capacitor in the rectifier circuit (not shown) of the antenna 14 and the transmission / reception circuit 15 is the main passive element occupying the area.
- the transmission / reception circuit 15 has a radio frequency (RF) circuit and an analog interface (IF), and transmits data from the digital signal processing circuit 16 to the outside or sends in external data. It is ideal to integrate all of these at once, but usually there are many examples where these circuits are separated into chips.
- a clock circuit 17 is connected to the digital signal processing circuit 16, and a power supply circuit 18 is connected to the transmission / reception circuit 15 and the clock circuit 17.
- FIG. 5B is a perspective view schematically showing a layout of an IC tag formed using a fiber SOI substrate.
- Fiber SOI substrate with square cross-section 5 One side of the circuit is composed of three active circuits 25 to 27 on one side, and two types of antennas or inductors 20a and 2b are formed on the other side. Has been. On the remaining surface, a smoothing capacitor 21, which is a passive element, is formed. As can be seen from this structural force, each passive element and active element are separated from each other and formed on a complete insulating substrate, and can have a high-performance function.
- each of the integrated circuits 25 to 27 is formed on the fiber SOI substrate 5, but the fiber 1 is regarded as a kind of printed wiring board and necessary passive elements, wirings, etc. are formed in advance.
- An IC tag may be configured by bonding a separately manufactured silicon chip.
- FIG. 6A shows a process flow for forming a transistor on a fiber
- FIG. 6B shows a cross-sectional view of the formation process.
- FIG. 6A and FIG. 6B are diagrams showing an example of a MOS transistor formation process when the fiber SOI substrate 5 is used.
- the silicon film 3 is patterned to form an island of the silicon film 3.
- the surface of the silicon film 3 is gate-oxidized by means such as plasma oxide, thermal oxidation, and oxide film formation. Covering with the film 9a, the gate electrode 9b is formed on the gate oxide film 9a.
- a metal such as tungsten or tandane silicide, or a metal silicide was used.
- impurity ion implantation is performed on both sides of the gate electrode 9b to form the first impurity introduction region 3s and the second impurity introduction region 3d constituting the source and drain (S ZD). Form.
- a first interlayer insulating film 9c is formed by, for example, a thermal CVD method, and further, the first layer is etched by using a resist mask.
- Contact holes 9d to 9f were opened on the gate electrode 9b and the first and second impurity introduction regions 3s and 3d in the insulating film 9c to form a gate wiring 9g, a source wiring 9i, and a drain wiring 9h.
- titanium (Ti) was used as the lower metal of these wirings 9g, 9i, and 9h
- aluminum (A1) was used as the metal layer above it.
- the second interlayer insulating film is formed using the resist mask.
- Through holes 9k, 9m, and 9n are formed on the gate wiring 9g, source wiring 9i, and drain wiring 9h, respectively, and further on the second interlayer insulating film and in the through holes 9k, 9m, and 9n.
- An aluminum film is formed.
- the resist film is used to etch the aluminum film, and through each of the through-holes 9k, 9m, and 9n, multiple second-layer wirings connected separately to the gate electrode 9g, source wiring 9i, and drain wiring 9h 9p, 9r, 9s are formed.
- the resist mask is removed after etching.
- the reel-to-reel method is a method in which a fiber is unwound by a reel and a predetermined process is performed, and thereafter, the fiber is wound again on a reel and transferred to the next process.
- FIG. 7 shows a flow of forming a fiber SOI substrate, which is a one-dimensional substrate, an island forming flow of a silicon film, a gate electrode forming flow, a source Z drain (SZD) forming flow, and a first interlayer insulating film.
- the first category in principle, corresponds to a process that does not require a vacuum chamber.
- Fig. 7 the process part with a circle in the lower right corner of the block.
- the second category is the process in the vacuum chamber, and the reel is a process that is installed in the chamber, and the process part with the mark in the block in Fig. 7 corresponds to this.
- the third is the exposure process, which is the part marked with ⁇ in the block in FIG.
- FIGS 8 and 9 show the image of these three categories of devices.
- the fiber 1 drawn out from the take-up reel 30a passes through the various process devices 32-36 and is finally taken up on the take-up reel 30b.
- the traveling direction of the fiber 1 is changed by another reel 31a to 31d or the like depending on the process and the device configuration in each of the process devices 32 to 36.
- the reels 40a and 40b disposed before and after the process chamber 43 are unwound and wound in the vacuum chambers 41a and 41b.
- a sputtering electrode, a dry etching electrode or an ion gun component 44 is arranged in the process chamber 43.
- the fiber 1 travels in a straight line without changing its direction.
- Processes that employ this method include film formation, dry etching, and implantation.
- the film forming process includes a process of completely removing the resist applied before film formation by ashing, ultraviolet irradiation or the like in a vacuum chamber.
- the resist in this case is just a protective film, and a material that can be easily peeled off is selected.
- the dry etching and implantation processes include a process of removing a hardened portion of the resist generated in the process.
- fiber 1 has several Since different working gases pass continuously through different stages, it is necessary to separate the different tanks by differential exhaust.
- differential exhaust chambers, dry stripping chambers or ashing chambers 42a to 42d around the process chamber 43 for film formation, ion implantation, dry etching, and the like correspond to these tanks.
- the reel 40b When winding the fiber 1 coated with resist on the reel 40b, the reel 40b has a diameter of 300mm or more.
- the diameter of Le 40b shall be 600mm or more.
- FIG. 9A is a diagram showing the principle of miniaturized reduction projection exposure optical systems 50 arranged in a line on the fiber 1.
- the imaging lens 51 has the size of an objective lens of a microscope, and the exposure mask 52 illuminated by the Koehler illumination optical system 53 is reduced and projected onto the fiber 1 at 5: 1. Do.
- the alignment of the fiber 1 is performed by the servo control computer 55 that processes the signal of the detection system 57 that performs the position, linearity, etc. of the fiber 1 and feeds it back to each individual imaging lens control system 56 and the single fiber control system 58. Do it.
- the concept of the fiber 1 alignment system is shown in FIG. 9B.
- the alignment diameter is determined by detecting the position and angle of the fiber 1 using the fiber one-surface position detection optical system 60 to 62 and mirrors 6 7a and 67b using three surfaces other than the exposure surface of the fiber 1.
- the fiber 1 is positioned.
- Alignment 'Fiber 1 is stationary during the exposure process, and fiber 1 feeding during the exposure process is stepwise.
- FIG. 10 the exposure on each of the four surfaces of the square fiber 1 is easily performed by changing the placement of the exposure machine and the reel.
- Fig. 10A shows the state where the top surface of the fiber 1 is directed toward the coupling lens 51 of the exposure optical system 50, and the reels 70a and 70b for winding are arranged.
- Fig. 10B shows the coupling of the bottom surface of the fiber 1. Turn each lens so that it faces the lens 51.
- 10C shows a state in which the reels 70a and 70b are arranged so that the side surface adjacent to the upper surface of the fiber 1 faces the coupling lens 51.
- FIG. 10A shows the state where the top surface of the fiber 1 is directed toward the coupling lens 51 of the exposure optical system 50, and the reels 70a and 70b for winding are arranged.
- Fig. 10B shows the coupling of the bottom surface of the fiber 1. Turn each lens so that it faces the lens 51.
- 10C shows a state in which the reels 70a and 70b are arranged so that the
- the positions of the reels 70a and 70b are fixed, and the coupling lenses 51 of the plurality of exposure optical systems 50 are arranged facing the four surfaces of the fiber 1. That is, the plurality of exposure optical systems 50 are arranged in four directions around the fiber 1 by changing the direction so that the coupling lenses 51 face different surfaces of the fiber 1. Also in this case, a plurality of exposure optical systems 50 may be arranged in the longitudinal direction of each surface.
- the standard investment processing capacity of the current semiconductor production line is 9,000 wafers per month when using a 200 mm semiconductor wafer, and 300 mm ⁇ is the most advanced large-scale investment. There is also a plan to use 20,000 wafers per month when using the same semiconductor wafer.
- the tact time is 200 seconds Z wafer in the former case and 90 seconds Z wafer in the latter case.
- a 0.3 mm wide square fiber 1 is used, and the effective width of one side is 0.2 mm.
- the first example of the exposure machine is one in which the fiber 1 is made to correspond to a semiconductor wafer of 200 mm ⁇ (diameter 8 inches). That is, the length of the fiber corresponding to this semiconductor wafer is 157 m, and when exposure is performed in units of 50 cm in FIG. 9A, 314 exposures 'alignment in 200 seconds, that is, 1 exposure' alignment time is 0. 6 seconds.
- the current standard excimer stepper has an exposure time of approximately 1 second, of which exposure time is 0.1 to 0.3 seconds, and alignment time is 0.9 to 0.7 seconds. For one-dimensional fibers, the mechanical-alignment time was 0.5 seconds and the exposure time was 0.1 seconds.
- the current excimer exposure machine is changed to the configuration shown in Fig. 9A.
- the second example related to an exposure machine is for a 300 mm ⁇ (12 inch diameter) semiconductor wafer.
- the length of the fiber is about 350 m, and when exposed in units of 50 cm in FIG. 9A, it takes 90 seconds.
- 700 exposures / alignment that is, one exposure / alignment time is about 0.1 second. Therefore, the power to reduce the one-exposure 'alignment time of the current standard excimer stepper by one digit It is possible enough.
- the exposure time includes a dose amount side and an incoherent side.
- FIG. 11A is a principle diagram of the exposure optical system.
- the light 80 having the light source power is converted into a secondary light source by the first split lens 81a, passes through the incoherent unit 82, and is uniformly illuminated on the exposure mask 85 by the second split lens 8 lb and the condenser lens 83.
- the Further, the mask pattern is Fourier-transformed twice by the field lens 84 and the imaging lens 86 arranged before and after the exposure mask 85, and an image is obtained on the imaging surface 87.
- the operation of the incoherent beam in the incoherent beam unit 82 is performed between the split lenses 81a and 81b, and the optical path differences of various lengths that are longer than the coherent length of each of the split beams as shown in FIG. 11B.
- the light is introduced into one end of the optical fiber 89 through the incident side lens 88a, and emitted from the other end of the optical path difference optical fiber 89 through the output side lens 88b so as to be aligned with the split lens 8 lb.
- lshot is incoherent.
- the effective exposure area of the imaging lens 51 is lm m X 5 mm, NA (numerical aperture) is 0.42, and resolution is 0.3 ⁇ m.
- This reduced projection exposure optical system 50 is composed of 17 pieces, arranged at a pitch of 30 mm and collectively exposing 500 mm.
- the circuit of the IC tag falls within the region of lmm 2 is designed in the wafer surface, in a case where this cross section is fabricated on the fiber 1 of 0. 3 mm square, the effective width 0. 2 mm, the length The depth is 5mm.
- the force that causes the size of the IC tag is 3 Omm. If longer than this, the pitch of the imaging lens 51 of the reduction projection exposure optical system 50 is widened. Reduces the number of imaging lenses 51 for exposure.
- the size of the IC tag is short, exposure is performed while adjusting the position between the imaging lenses 51 so as to be an integral multiple of the length of the IC tag and shifting the length by that length.
- the 8-inch wafer shown in the first example of the above exposure machine is used.
- a process consistent with 9,000 sheets per month was made.
- the fiber 1 is fed in a stepwise force. Otherwise, in principle, it is a constant speed process.
- the table shown in FIG. 12 shows a comparison of various process rates when using the current planar substrate and the fiber SOI substrate of this example.
- a thermal CVD apparatus as shown in FIG. 13 is used to grow a film such as a silicon oxide film or a silicon nitride film in the fiber.
- a deposition chamber 90 composed of a quartz tube whose pressure is reduced by exhaust is heated to a high temperature by an outer heater 91, and a deposition gas is introduced into the quartz tube 90 through the gas inlets 92a and 92b.
- Exhaust ports 93a and 93b arranged at a predetermined distance from the gas inlet ports 91a and 92b are discharged and decompressed, thereby forming a film on the surface of the fiber 1.
- the region between the gas inlets 9 la and 91b and the exhaust ports 93a and 93b, that is, the length of the film forming effective part is, for example, lm.
- Such a thermal CVD apparatus corresponds to the process chamber 43 shown in FIG. 8B, for example.
- RIE reactive ion etching
- the RIE apparatus introduces the etching gas into the tubular dry etching chamber 100 through the gas introduction ports 101a and 101b at a pressure of about atmospheric pressure, and keeps a predetermined distance from the gas introduction ports 101a and 101b.
- the pressure is reduced by exhausting through the exhaust ports 102a, 102b provided in the reaction tube 100.
- a structure in which a density plasma is generated in the reaction ring 100 is obtained.
- the electric power of the high-frequency power sources 105 and 106 is applied to the linear electrodes 103 and 104 disposed in parallel and close to the fiber 1, and the etching rate is increased by electric field concentration.
- the linear electrodes 103, 104 are separated into two in the gas flow direction and are adjacent to each other with a gap therebetween.
- One linear electrode 103 on the upstream side of the reaction gas flow path has a shape close to the fiber 1 and sharpened as shown in FIG. 14B, which is a cross-sectional view taken along the line II in FIG. 14A. Etching can be performed by increasing the etching rate by concentrating the electric field 107 on 1.
- the membrane is considerably etched under the linear electrode 103, and the downstream of the reaction gas channel.
- FIG. 14C which is a cross-sectional view taken along the line II-II in FIG.
- a metal film such as aluminum (A1) or tungsten (W) is formed on the fiber 11 by ion plating.
- a metal film such as aluminum (A1) or tungsten (W) is formed on the fiber 11 by ion plating.
- a metal film such as aluminum (A1) or tungsten (W) is formed on the fiber 11 by ion plating.
- a metal film such as aluminum (A1) or tungsten (W) is formed on the fiber 11 by ion plating.
- the film formation rate and the etching rate are insufficient, and thus 10 processes are performed in parallel.
- the reel diameter is 500mm ⁇ , one wafer is 100 turns and the reel width is 30mm. Even if 10 reels are arranged, the reel itself can fit in a 500mm width container. Fiber 1 is collected to a width of about 10mm in the process area. Normally, a lot of 25 lots are wound on one reel following a semiconductor. The reels that can not be handled by reels are the activation and H after activation.
- the wet process is divided into three types: resist coating, pre-beta, development, cleaning 'drying, stripping' cleaning 'and drying.
- the resist coating 'pre-beta is a process similar to coating a protective film in the process of drawing an optical fiber because fiber 1 is continuously sent to the resist coating section 110 and the pre-bake furnace 111. It is.
- Development, washing, and peeling are typically in the form in which the fiber 1 is introduced into the liquid bath 112 as shown in FIG. 15B.
- the liquid is circulated, replaced, and temperature-controlled by the no-pass unit 113, and is controlled so as to be always in a constant condition.
- the drying is IPA drying using isopropyl alcohol (IPA) vapor
- the power outlet 114 adopting the same configuration as in FIG. 15B is the vapor phase of IPA.
- IPA isopropyl alcohol
- a 2.45 GHz high frequency semiconductor device (REID) as shown in Fig. 5 was fabricated.
- Fiber 1 is a square shape with a cross section of 0.3 mm in width, 60 mm in length, formed with rod-shaped antenna 20a (14) on one side, and SOI circuit 25-27 on the other side.
- a digital signal processing circuit 16 including a rectifier circuit, RF section, and EEPROM is built in.
- a 600 pF capacitor 21 for power supply is formed on the other side adjacent to the SOI structure forming surface on the back side of the antenna 20a.
- a fiber having a square cross section is used.
- a fiber having a triangular, pentagonal, or higher polygonal cross section may be used.
- the present invention makes it possible to use all types of semiconductor devices using an SOI substrate at a low price, and at the same time, enables the use of quartz fiber as a PCB.
Landscapes
- Thin Film Transistor (AREA)
- Recrystallisation Techniques (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/718,302 US20090001501A1 (en) | 2004-10-28 | 2005-10-27 | Fiber Soi Substrate, Semiconductor Device Using Same and Method for Manufacturing Same |
| US13/614,512 US8598017B2 (en) | 2004-10-28 | 2012-09-13 | Fiber SOI substrate, semiconductor device using this, and manufacturing method thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004314882A JP2006128414A (ja) | 2004-10-28 | 2004-10-28 | ファイバーsoi基板及びこれを用いた半導体素子並びにその製造方法 |
| JP2004-314882 | 2004-10-28 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/718,302 A-371-Of-International US20090001501A1 (en) | 2004-10-28 | 2005-10-27 | Fiber Soi Substrate, Semiconductor Device Using Same and Method for Manufacturing Same |
| US13/614,512 Division US8598017B2 (en) | 2004-10-28 | 2012-09-13 | Fiber SOI substrate, semiconductor device using this, and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006046640A1 true WO2006046640A1 (ja) | 2006-05-04 |
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ID=36227882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/019779 Ceased WO2006046640A1 (ja) | 2004-10-28 | 2005-10-27 | ファイバーsoi基板及びこれを用いた半導体素子並びにその製造方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US20090001501A1 (ja) |
| JP (1) | JP2006128414A (ja) |
| WO (1) | WO2006046640A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8698697B2 (en) * | 2007-06-12 | 2014-04-15 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
| US12550291B2 (en) | 2020-05-29 | 2026-02-10 | Tomoegawa Corporation | Temperature regulation unit and method for manufacturing temperature regulation unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004258206A (ja) * | 2003-02-25 | 2004-09-16 | Kenkichi Suzuki | アクティブマトリクス型led表示装置およびその要素 |
| JP2004273817A (ja) * | 2003-03-10 | 2004-09-30 | Semiconductor Energy Lab Co Ltd | 半導体装置及びその作製方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4352621B2 (ja) | 2001-03-05 | 2009-10-28 | パナソニック株式会社 | 透光性導電性線状材料、繊維状蛍光体及び織物型表示装置 |
| US20060257074A1 (en) * | 2004-09-21 | 2006-11-16 | The Furukawa Electric Co., Ltd. | Semiconductor device, display device and device fabricating method |
-
2004
- 2004-10-28 JP JP2004314882A patent/JP2006128414A/ja active Pending
-
2005
- 2005-10-27 US US11/718,302 patent/US20090001501A1/en not_active Abandoned
- 2005-10-27 WO PCT/JP2005/019779 patent/WO2006046640A1/ja not_active Ceased
-
2012
- 2012-09-13 US US13/614,512 patent/US8598017B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004258206A (ja) * | 2003-02-25 | 2004-09-16 | Kenkichi Suzuki | アクティブマトリクス型led表示装置およびその要素 |
| JP2004273817A (ja) * | 2003-03-10 | 2004-09-30 | Semiconductor Energy Lab Co Ltd | 半導体装置及びその作製方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130023090A1 (en) | 2013-01-24 |
| US20090001501A1 (en) | 2009-01-01 |
| US8598017B2 (en) | 2013-12-03 |
| JP2006128414A (ja) | 2006-05-18 |
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