WO2004090982A1 - 電池搭載集積回路装置 - Google Patents
電池搭載集積回路装置 Download PDFInfo
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- WO2004090982A1 WO2004090982A1 PCT/JP2004/004881 JP2004004881W WO2004090982A1 WO 2004090982 A1 WO2004090982 A1 WO 2004090982A1 JP 2004004881 W JP2004004881 W JP 2004004881W WO 2004090982 A1 WO2004090982 A1 WO 2004090982A1
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- diffusion layer
- battery
- integrated circuit
- type impurity
- circuit device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/40—Printed batteries, e.g. thin film batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/58—Structural electrical arrangements for semiconductor devices not otherwise provided for, e.g. in combination with batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery-mounted integrated circuit device in which an integrated circuit and a solid-state battery coexist.
- a semiconductor substrate directly below the solid-state battery It has been proposed to form a diffusion layer in which an N-type impurity is doped, and to apply a high potential equal to or higher than the potential of the positive electrode of the solid-state battery to the diffusion layer (see, for example, See JP-A-33420).
- the diffusion layer to which a higher potential than the potential of the positive electrode of the solid state battery is applied can prevent positive ions, for example, lithium ions, which perform charge and discharge of the solid state battery, from diffusing into the semiconductor substrate. For this reason, it is possible to prevent the characteristics of the semiconductor element from deteriorating or the semiconductor element from malfunctioning due to the ions that perform charge and discharge.
- the contact resistance between the diffusion layer and the potential application electrode increases. To reduce this contact resistance, it is necessary to increase the concentration of N-type impurities in the diffusion layer immediately below the solid-state battery.
- the region of the diffusion layer to be formed can be reduced. Therefore, the amount of N-type impurities required for increasing the concentration of N-type impurities in the diffusion layer is small.
- the area occupied by the solid-state battery on the substrate is large, the area of the diffusion layer to be formed becomes large. Therefore, the amount of N-type impurities required to increase the concentration of N-type impurities in the diffusion layer also increases. Furthermore, the required amount of N-type impurities increases the time required to form the diffusion layer. As described above, as the size of the solid-state battery formed on the semiconductor substrate increases, the problem that the production efficiency decreases occurs.
- an object of the present invention is to provide a battery-mounted integrated circuit device capable of efficiently preventing deterioration in characteristics of a semiconductor element and malfunction of the semiconductor element without using a large amount of N-type impurities.
- the present invention is a.
- the present invention also relates to a battery-mounted integrated circuit device including a second diffusion layer containing an N-type impurity overlapping with the first diffusion layer.
- the solid-state battery includes a positive electrode, a negative electrode, and a solid electrolyte disposed between the positive electrode and the negative electrode.
- the concentration of the N-type impurity in the first diffusion layer is higher than the concentration of the N-type impurity in the second diffusion layer.
- the concentration of the N-type impurity in the first diffusion layer is lXlOiSatomsZcm3 or more.
- the ratio of the concentration of the N-type impurity in the first diffusion layer to the concentration of the N-type impurity in the second diffusion layer is:
- X 1 is preferably 0 5 or less.
- the first diffusion layer and the second diffusion layer have a positive potential.
- the positive potential is equal to or higher than the potential of the positive electrode with respect to the negative electrode.
- the first diffusion layer surrounds a region where the solid-state battery is mounted.
- the battery-mounted integrated circuit device further includes a wiring layer for conducting the first diffusion layer to the outside.
- the battery-mounted integrated circuit device further includes a potential control section that controls a potential applied to the first diffusion layer and the second diffusion layer.
- FIG. 1 is a longitudinal sectional view showing a main part of a battery-mounted integrated circuit device according to one embodiment of the present invention.
- FIG. 2 is a plan view of a battery-mounted integrated circuit device according to another embodiment of the present invention.
- FIG. 3 is a sectional view taken along line III-III in FIG.
- FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D are vertical cross-sectional views illustrating the manufacturing process of the battery-mounted integrated circuit device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows a battery-mounted integrated circuit device according to an embodiment of the present invention.
- the battery-mounted integrated circuit device 10 of FIG. 1 includes a semiconductor substrate 11, a solid-state battery 12 mounted on the semiconductor substrate 11, and an integrated circuit (not shown).
- the battery-mounted integrated circuit device 10 further includes an N-type impurity formed between a region 18 of the semiconductor substrate 11 on which the solid state battery 12 is mounted and a region 19 of the semiconductor substrate 11 on which the integrated circuit is mounted. It has a first diffusion layer 13 and a second diffusion layer 14 containing an N-type impurity formed below a region 18 of the semiconductor substrate 11 on which the solid state battery 12 is mounted.
- an insulating layer 15 is formed on the surface of the semiconductor substrate 11.
- the wiring layer 16 formed on the semiconductor substrate 11 is connected to the first diffusion layer 13.
- the first diffusion layer 13 and the second diffusion layer 14 overlap each other. Further, the first diffusion layer 13 may be formed in the second diffusion layer 14.
- the solid-state battery 12 includes a negative electrode current collector film 12 1, a negative electrode film 12 2, a solid electrolyte film 12 3, a positive electrode film 12 4, and a positive electrode current collector, which are sequentially stacked on the semiconductor substrate 11. It consists of body membrane 1 25. Further, the positions of the positive electrode and the negative electrode may be reversed.
- the solid state battery 12 is protected by the surface protection layer 17.
- Various substrates can be used as the semiconductor substrate 11. Examples include a silicon substrate, a sapphire substrate, and a substrate made of silicon nitride, alumina, quartz, or the like.
- the insulating layer 15 on the surface of the semiconductor substrate 11 a material that can insulate the semiconductor substrate 11 from the negative electrode current collector film 121 can be used.
- the insulating layer 15 include a layer made of a silicon oxide film, a layer made of a resin such as silicon nitride, alumina, quartz, or polyimide.
- an insulating layer made of a silicon oxide film can be formed on the silicon substrate by using a plasma CVD method.
- silicon oxide film In the case of silicon oxide film,
- a pentavalent element such as phosphorus arsenic can be used.
- the negative electrode current collector film 121 a film made of a negative electrode current collector material capable of forming a thin film can be used.
- the negative electrode current collector material include copper and Nigel.
- the negative electrode film 122 a film made of a negative electrode material capable of forming a thin film can be used.
- the negative electrode material include graphite and lithium metal.
- the positive electrode film 124 a film made of a positive electrode material capable of forming a thin film can be used.
- the cathode material LiCo2,
- the positive electrode current collector film 125 a film made of a positive electrode current collector material capable of forming a thin film can be used.
- Aluminum positive electrode current collector material Palladium nickel and the like.
- solid electrolyte membrane 123 a lithium ion conductive solid electrolyte, a silver ion conductive solid electrolyte, a copper ion conductive solid electrolyte, or the like can be used depending on the electrode material.
- Li 2 S—Si S 2 Li 2 S—Si S 2
- L il, L il —A l 2 ⁇ 3, L i sN, L is N— L i I _ L i OH, L i 2 O-S i O 2> L i 2 O-B 2 O 3, L i I-L i 2 S-P 205, L il — L l 2 S — B 2 S 3> L i 3.6 S i o.6 P o.4 O 4,
- LiI-Li3P04-P2S5 or the like can be used.
- Organic dry polymers such as polyethylene oxide can also be used as the lithium ion conductive solid electrolyte.
- Li x Mo S 2, Li x Mo 2, Li x V 2 O 5, Li x Vs O i 3, metallic lithium, Li 3/4 Ti 5 / 3 ⁇ 4, etc. usually lithium Compounds used for batteries can be used in combination to obtain a desired battery voltage. In the above compounds, 0 ⁇ x ⁇ 2.
- CuI—Cu20—Mo3, Rb4Cu16I7C113, etc. can be used.
- metals such as metal Cu, C12S, CuxTis2, C2M06S7.8 can be used as the electrode material.
- ⁇ As the silver ion conductive solid electrolyte, ⁇ ; — A gl, Ag 6 I 4WO4, C sH 5 NHA g 5 l6, Ag I — Ag 2 O— Mo 3, AgI-Ag2O-B2O3, AgI-Ag2 ⁇ V2O5 and the like can be used.
- the negative electrode current collector film, the positive electrode current collector film, the negative electrode film, the positive electrode film, and the solid electrolyte film can be manufactured by a vacuum evaporation method, a sputtering method, or the like.
- the wiring layer 16 may be made of a conductive material. Examples of the conductive material include aluminum.
- the first diffusion layer 13 is disposed between the area for mounting the solid state battery on the semiconductor substrate and the area for mounting the integrated circuit
- the second diffusion layer 14 is disposed between the area for mounting the solid state battery. It is located below. Further, the first diffusion layer 13 and the second diffusion layer 14 overlap each other. Therefore, when a positive potential is applied to the first diffusion layer 13 through the wiring layer, the second diffusion layer below the region where the solid state battery is mounted on the semiconductor substrate also has a positive potential.
- lithium ions which are cations
- charge and discharge the solid battery Since the first diffusion layer 13 and the second diffusion layer 14 have a positive potential, lithium ions, which are cations, electrically repel the first diffusion layer 13 and the second diffusion layer 14. become. Therefore, it is possible to prevent lithium ions from diffusing in the semiconductor substrate beyond the first diffusion layer 13 and the second diffusion layer 14. Therefore, even if pinholes and cracks are formed in the current collector film 121 and the insulating layer 15, cations responsible for charging and discharging such as lithium ions are discharged from the solid state battery when charging and discharging the solid state battery. It is possible to prevent diffusion to the circuit formation region.
- the concentration of the N-type impurity in the first diffusion layer is higher than the concentration of the N-type impurity in the second diffusion layer.
- the wiring layer The contact resistance between the first diffusion layer 13 and the first diffusion layer 13 electrically connected to the wiring layer 16 is reduced. For this reason, unlike the conventional case, it becomes possible to apply a positive potential to the second diffusion layer 14 through the first diffusion layer.
- the first diffusion layer 13 having a high concentration of the N-type impurity, it is not necessary to increase the concentration of the N-type impurity in the second diffusion layer 14. Can be reduced.
- the concentration of the N-type impurity in the first diffusion layer is the concentration of the N-type impurity in the first diffusion layer.
- the concentration of the N-type impurity in the first diffusion layer is higher than 1 ⁇ 10 23 atoms Z cm 3, it is necessary to further increase the concentration of the second diffusion layer. The amount of impurities increases.
- the ratio of the concentration of the N-type impurity in the first diffusion layer to the concentration of the N-type impurity in the second diffusion layer is preferably 1 ⁇ 10 1 to 1 ⁇ 10 5 , and 1 ⁇ 10 2 It is more preferable that the number is 1 to 10 3 .
- the ratio of the concentration of the N-type impurity in the first diffusion layer to the concentration of the N-type impurity in the second diffusion layer is 1 ⁇ 101 or more, when a solid-state battery composed of a single cell is mounted, cations Diffusion to the semiconductor substrate can be reliably prevented, and a highly reliable integrated circuit device with a battery can be obtained.
- the ratio of the concentration becomes larger than 1 X 1 0 5, the breakdown voltage of the first diffusion layer 1 3 or the second diffusion layer 1 4 decreases, it becomes impossible to apply a desired voltage.
- the N-type impurity contained in the first diffusion layer and the N-type impurity contained in the second diffusion layer may be the same element or different elements. Further, a mixture of a plurality of pentavalent elements as described above may be used as the N-type impurity.
- the size and depth of the first diffusion layer 13 and the second diffusion layer 14 are appropriately determined depending on the size of the semiconductor substrate used, the size of the solid state battery mounted on the semiconductor substrate, and the like.
- the positive potential applied to the first diffusion layer 13 and the second diffusion layer 14 is preferably equal to or higher than the potential of the positive electrode with respect to the negative electrode. This is because ions that charge and discharge the solid state battery from the positive electrode, such as metal ions such as Li + ions, tend to be pulled below the positive electrode potential, such as the negative electrode. It is.
- a positive potential equal to or higher than the potential of the positive electrode with respect to the negative electrode may be applied only when the solid-state battery is being charged or discharged, or may be constantly applied.
- a positive potential can be applied up to the breakdown voltage of the first diffusion layer 13 or the second diffusion layer 14 without affecting the characteristics of the battery or the semiconductor circuit.
- the above-described solid-state battery may be used, or another power supply may be used.
- a solid battery formed by stacking a plurality of single cells or a solid battery composed of a single cell connected in series or in parallel may be used instead of the solid battery 12 composed of a single cell.
- a solid battery formed by stacking a plurality of single cells or a solid battery composed of a single cell connected in series or in parallel may be used instead of the solid battery 12 composed of a single cell.
- the voltage of the solid state battery changes depending on the number of layers and the like, it is preferable to apply a positive potential higher than the voltage of the solid state battery to the first diffusion layer 13 and the second diffusion layer 14.
- Such control of the positive potential may be performed by a potential control unit.
- the magnitude of the positive potential is controlled by setting in advance the magnitude of the positive potential applied to the diffusion layers 13 and 14 in the potential control unit. be able to.
- the potential of the positive electrode with respect to the negative electrode may be detected, and a positive potential higher than that potential may be applied.
- the potential control unit may include a power supply unit for applying a positive potential.
- the potential control unit may be configured so that a positive potential is always applied to the diffusion layers 13 and 14, or only when the solid state battery is charged and discharged, the diffusion layers 13 and 1 are not applied. A positive potential may be applied to 4. Further, this potential control unit may be provided in the battery-mounted integrated circuit device, or may be provided outside the battery-mounted integrated circuit device.
- the first diffusion layer 13 containing an N-type impurity forms an N-type impurity between an integrated circuit mounting region and a solid-state battery mounting region when an integrated circuit including a semiconductor element is formed on a semiconductor substrate. It can be formed by ion implantation. For example, N-type impurity acceleration voltage 40 keV, dose amount
- a 0.2 m first diffusion layer can be formed.
- the second diffusion layer 14 containing an N-type impurity can be formed, for example, as follows. Before forming the first diffusion layer, N-type impurities are ion-implanted in a region where the solid state battery is formed. The implantation conditions at this time are, for example, an acceleration voltage of 100 keV for the N-type impurity and a dose of 5.0 ⁇ 10 15 / cm 2 . Thereafter, heat treatment is performed at 100 ° C. for 60 minutes. Thus, the second diffusion layer 14 having a width of 10 mm and a thickness of 3 zm can be formed.
- the second diffusion layer 14 since the second diffusion layer 14 requires heat treatment, it is preferable to form the second diffusion layer 14 before forming the first diffusion layer.
- the concentration of the N-type impurity in the first diffusion layer 13 and the second diffusion layer 14 depends on the acceleration of the N-type impurity when the first diffusion layer 13 and the second diffusion layer 14 are formed. By adjusting the voltage and dose, it can be controlled appropriately it can.
- the battery-mounted integrated circuit device in which the first diffusion layer is formed so as to surround the region where the solid-state battery is mounted will be described with reference to FIGS.
- the battery-mounted integrated circuit device 20 in FIG. 2 has a solid state battery 22 and an integrated circuit (not shown) mounted on a semiconductor substrate 21.
- a first diffusion layer 2 containing an N-type impurity is provided between a region 28 of the semiconductor substrate 21 where the solid state battery is mounted and a region 29 where the integrated circuit is mounted. 3 is formed.
- a second diffusion layer 24 containing an N-type impurity is formed below a region 28 of the semiconductor substrate 21 on which the solid state battery 22 is mounted.
- the insulating layer 25 is formed on the surface of the semiconductor substrate 21 as in the case of the first embodiment.
- the wiring layer 26 formed on the semiconductor substrate 21 is connected to the first diffusion layer 23.
- the first diffusion layer 23 and the second diffusion layer 24 overlap each other. Further, the first diffusion layer 23 may be formed in the second diffusion layer 24.
- the concentration of the N-type impurity in the first diffusion layer 23 is higher than the concentration of the N-type impurity in the second diffusion layer 24. Further, the concentration of the N-type impurity in the first diffusion layer 23 and the ratio of the concentration of the N-type impurity in the first diffusion layer 23 to the concentration of the N-type impurity in the second diffusion layer 24 are determined in the above-described embodiment. Same as 1
- the solid-state battery 22 includes a negative electrode current collector film 22 1, a negative electrode film 22 2, a solid electrolyte film 22 3, a positive electrode film 22 4, and a positive electrode current collector, which are sequentially stacked on the semiconductor substrate 21. It consists of body membrane 2 25. Further, the positions of the positive electrode and the negative electrode may be reversed. As the semiconductor substrate 21, the solid-state battery 22, the N-type impurities, and the like, those similar to those in the first embodiment can be used.
- the first diffusion layer 23 is formed so as to surround a region where the solid state battery is mounted. Therefore, a positive potential can be applied not only directly below the solid-state battery but also around the solid-state battery by applying a potential higher than the potential of the positive electrode with respect to the negative electrode. This makes it possible to further suppress the movement of ions responsible for charging / discharging of the solid-state battery from the region surrounded by the first diffusion layer 23, and to arrange the integrated circuit freely around the region. It becomes.
- a positive potential equal to or higher than the potential of the positive electrode with respect to the negative electrode may be applied only when charging / discharging the solid-state battery, or may be always applied. Further, the control of the positive potential can be performed by using the potential control unit as in the first embodiment.
- the size and depth of the first diffusion layer 23 and the second diffusion layer 24 are the same as in the first embodiment, and the size of the semiconductor substrate used and the solid state battery mounted on the semiconductor substrate are similar to those of the first embodiment. Depending on the size, etc., is determined as appropriate.
- FIGS. 4A to 4D a battery-mounted integrated circuit device as shown in FIG. 1 was manufactured.
- 4A to 4D mainly show a method of manufacturing the first diffusion layer, the second diffusion layer, and the solid-state battery.
- a silicon oxide film 32 having a thickness of 150 ⁇ was formed on the silicon substrate 31 shown in FIG. 4A (1) by a plasma CVD method.
- the silicon substrate 31 a 4-inch diameter, 525 m thick, P-type silicon substrate having a specific resistance of 10 to 15 ⁇ ⁇ cm was used.
- SiH4 and ⁇ 2 ⁇ were used as reaction gases, and the frequency was 50 Plasma was generated by irradiating the reaction gas at a low frequency of 4 kHz with a low frequency of kHz.
- the growth temperature of the silicon oxide film 32 was set at 380.
- a photosensitive resist was applied on the silicon oxide film 32.
- the thickness of the applied photosensitive resist was set to 300 angstrom using a spinner having a rotational speed of 2000 rpm.
- a heat treatment was performed at 100 for 15 minutes to form a resist film 33 (FIG. 4A (2)).
- the resist film 33 was irradiated with short-wavelength light (wavelength: 436 nm) using an exposure apparatus.
- a quartz mask 34 patterned to have an opening 35 was used.
- the resist film 33 was patterned by immersion in a developing solution composed of organic alcohol (tetramethylammonium hydroxide).
- a developing solution composed of organic alcohol (tetramethylammonium hydroxide).
- the silicon oxide film 32 not covered by the resist film 33 is etched by RIE (Reactive Ion Etching) dry etching, and the silicon oxide film covered by the resist film is etched on the silicon substrate. Only membrane 36 was left.
- a high frequency of 13.56 MHz and CHF 3 was used as an etching gas for dry etching.
- a mask alignment mark was also formed.
- mask alignment was performed using this mark as a reference. As a result, the films formed and patterned in a later step were prevented from shifting.
- the resist film remaining on the silicon oxide film 36 was immersed in a resist stripping solution and removed.
- phosphorus was ion-implanted into portions of the silicon substrate 31 that were not covered with the silicon oxide film 36 using an ion implanter (FIG. 4A (4)).
- the accelerating voltage of phosphorus was lOOK e V, and the dose was 5 ⁇ 10 12 Z cm 2 .
- heat treatment was performed at 100 ° C. for 1 hour to form a second diffusion layer 37 containing N-type impurities (FIG. 4B (5)).
- the formed second diffusion layer 37 has a depth of 3 zm and an area of 100 mm 2
- a silicon oxide film 38 having a thickness of 150 ⁇ was formed on the silicon oxide film 36 and the second diffusion layer 37 by using a plasma CVD method (FIG. 4B (6)).
- a plasma CVD method SiH4 and N2 ⁇ are used as reaction gases, and plasma is generated by irradiating the reaction gas with a low frequency of 50 kHz with an output of 4 kW. I let it.
- the growth temperature of the silicon oxide film 38 was set at 380.
- a photosensitive resist was applied so as to have a thickness of 30000 angstroms.
- a spin core having a rotational speed of 200 rpm was used.
- a heat treatment was performed at 100 for 15 minutes to form a resist film 39 (FIG. 4B (7)).
- the resist film 39 was irradiated with short-wavelength light using a quartz mask 40 patterned so as to have an opening 41 (FIG. 4B (8)). At this time, an exposure apparatus was used for irradiation with short-wavelength light. Thereafter, the resist film 39 was patterned by immersion in a developing solution composed of an organic alkali (tetramethylammonium hydroxide). As a result, the resist film 39 where the first diffusion layer was to be formed was removed.
- a developing solution composed of an organic alkali (tetramethylammonium hydroxide).
- the silicon oxide film 38 at the portion where the resist film 39 was removed was removed by RIE dry etching. By this removal, a portion of the silicon substrate where the first diffusion layer was formed was exposed. This Thereafter, the remaining resist film 39 was immersed in a resist stripping solution and removed.
- a high frequency of 13.56 MHz and CHF 3 was used as an etching gas.
- Arsenic which is an N-type impurity, was ion-implanted into the exposed portion of the silicon substrate formed as described above using an ion implanter. At this time, the acceleration voltage of arsenic was set to 40 KeV, and the dose was set to 4 ⁇ 10 is / cm 2 (FIG. 4C (9)).
- a first diffusion layer 42 containing an N-type impurity was formed (FIG. 4C (10)).
- the first diffusion layer 42 had a depth of 0.2 m and an area of 4.75 mm 2 (0.5 mm (length) ⁇ 9.5 mm (width)).
- the concentration of the N-type impurities (in this case, phosphorus and arsenic) contained in the first diffusion layer 42 was measured using SIMS, and as a result, the impurity concentration was
- the silicon oxide films 36 and 38 were removed by immersion in a hydrofluoric acid aqueous solution (5 V o 1%) for 10 minutes.
- the polyimide film 43 is formed to a thickness of lm using a spinco at a rotation speed of 100 rpm. (FIG. 4C (11)).
- the polyimide film 43 was patterned to 15 mm (length) ⁇ 15 mm (width) (area: 25 mm 2 ) using the photolithography technique as described above. As a result, the silicon substrate portion on which the first diffusion layer 42 was formed was exposed. Next, on the silicon substrate portion on which the first diffusion layer 42 is formed and on the polyimide film 43, using a vacuum deposition apparatus with a chamber internal pressure of 10 mTorr, the thickness is 1 Xm and the area is 81 mm. 2 (9 mm (vertical) X 9 mm
- the metal aluminum film was formed. This metal aluminum film was patterned using the photolithography technology and the RIE dry etching apparatus described above to form a positive electrode current collector film 45 and a wiring layer 44 connected to the first diffusion layer 42 (see FIG. 4D (1 2)).
- a film made of LiCoO2 was formed.
- a predetermined metal mask made of SUS304
- the output of the irradiation beam to the target was 200 W
- the sputtering gas The introduction volume was 20 SCCM and the chamber pressure was 2 OmTorr.
- the film made of LiC002 was annealed at 400 for 2 hours to form a positive electrode film 46.
- Thickness composed of Li 2 S-Si S 2-Li 3 P O 4 on positive electrode film 46
- a 2 xm solid electrolyte membrane 47 was formed.
- a 5 m-thick negative electrode film 48 made of graphite was formed on the solid electrolyte film 47.
- the solid electrolyte film 47 and the negative electrode film 48 were formed by a laser ablation method. In the laser ablation over Chillon method, a chamber internal pressure 1 0 - a 2 T orr, the temperature of the silicon substrate 3 1 and 8 0 0 ° C.
- the laser has a wavelength of 2666 nm and an energy density of 205
- m with Y AG laser is J / cm 2.
- the repetition frequency of this YAG laser was set to 10 Hz, and the number of shots was set to 360,000.
- the solid electrolyte membrane 47 and the negative electrode membrane 48 are respectively formed by the photo Using lithography technology and RIE dry etching equipment, patterning was performed so that the area was 49 mm 2 (7 mm (vertical) X 7 mm (horizontal)).
- a negative electrode current collector film 49 made of metallic copper was formed on the negative electrode film 48 by a vacuum evaporation method (FIG. 4D (13)). At this time, the thickness of the negative electrode current collector film 49 was set to 1 xm and the area was set to 49 mm 2 (7 mm (vertical) X) using a metal mask (manufactured by SUS304) patterned into a predetermined shape. 7 mm (horizontal)). Here, the capacity of the obtained battery was 300 Ah.
- Liquid epoxy resin manufactured by Hitachi Chemical Co., Ltd .: CEL-C-1102
- a spinco at a rotation speed of 150 rpm. was applied to a thickness of 1 m.
- the applied liquid epoxy resin was thermally cured at 150 for 3 hours to form a surface protective layer 50.
- the surface protection layer 50 is patterned using the photolithography technique and the RIE dry etching apparatus as described above as shown in FIG. 4D (14) to obtain a battery-mounted integrated circuit device.
- the obtained battery-mounted integrated circuit device was designated as device 1.
- Example 2 The obtained battery-mounted integrated circuit device was designated as device 1.
- a battery-mounted integrated circuit device as shown in FIG. 2 was produced in the same manner as in Example 1, except that the first diffusion layer and the wiring layer were formed so as to surround the solid-state battery mounting area.
- the battery-mounted integrated circuit device thus obtained was named device 2.
- the design values were the same as the design values of the 5 V N-type MOS transistor.
- the Vd-Id characteristics and the on-voltage characteristics were examined in the same manner as described above.
- the voltage (gate voltage) applied to the gate was increased in the negative direction, and the gate voltage at which the drain current reached 11 A was measured.
- the first diffusion layer has a different concentration of the N-type impurity in the second diffusion layer.
- the obtained devices were designated as device 3, device 4, device 5 and device 6, respectively.
- the concentration of the N-type impurity in the first diffusion layer was lX10i9 / cm3.
- the Vd-Id characteristics and the on-voltage characteristics of the MOS transistor were measured in the same manner as described above.
- the battery-mounted integrated circuit device of the present invention efficiently prevents the integrated circuit formed on the same substrate as the solid-state battery from being contaminated by ions that charge and discharge the solid-state battery. be able to.
- the integrated circuit including the semiconductor element and the solid-state battery are formed on the semiconductor substrate.
- the present invention can be used not only when an integrated circuit including a semiconductor element is mounted, but also when an integrated circuit including an electronic element is mounted.
- the present invention can be applied not only to a semiconductor substrate but also to a case where all substrates in which lithium ions diffuse are used. Further, the present invention can be applied to not only lithium ion batteries but also all solid-state batteries in which metal ions are charged and discharged. Industrial potential
- a battery-mounted integrated circuit device capable of effectively preventing deterioration of characteristics of a semiconductor element and malfunction of the semiconductor element caused by diffusion of ions responsible for charging and discharging of a solid-state battery to a semiconductor substrate. be able to.
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- Physics & Mathematics (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/541,465 US7253494B2 (en) | 2003-04-04 | 2004-04-02 | Battery mounted integrated circuit device having diffusion layers that prevent cations serving to charge and discharge battery from diffusing into the integrated circuit region |
EP04725521A EP1632999B1 (en) | 2003-04-04 | 2004-04-02 | Battery mounted integrated circuit device |
DE602004032023T DE602004032023D1 (de) | 2003-04-04 | 2004-04-02 | Integrierte schaltung mit darauf angebrachter batterie |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003101251 | 2003-04-04 | ||
JP2003-101251 | 2003-04-04 |
Publications (1)
Publication Number | Publication Date |
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WO2004090982A1 true WO2004090982A1 (ja) | 2004-10-21 |
Family
ID=33156753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004881 WO2004090982A1 (ja) | 2003-04-04 | 2004-04-02 | 電池搭載集積回路装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7253494B2 (ja) |
EP (1) | EP1632999B1 (ja) |
CN (1) | CN100358144C (ja) |
DE (1) | DE602004032023D1 (ja) |
WO (1) | WO2004090982A1 (ja) |
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- 2004-04-02 CN CNB2004800049309A patent/CN100358144C/zh not_active Expired - Fee Related
- 2004-04-02 US US10/541,465 patent/US7253494B2/en not_active Expired - Lifetime
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009513025A (ja) * | 2005-12-05 | 2009-03-26 | インダストリー−アカデミック コーオペレーション ファンデーション キョンサン ナショナル ユニバーシティ | ウェーハ裏面に電源供給装置が内蔵した半導体用シリコンウェーハ |
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US10290908B2 (en) | 2014-02-14 | 2019-05-14 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and electronic device |
US10862177B2 (en) | 2014-02-14 | 2020-12-08 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and electronic device |
US11342599B2 (en) | 2014-02-14 | 2022-05-24 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and electronic device |
US11848429B2 (en) | 2014-02-14 | 2023-12-19 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and electronic device |
US12266769B2 (en) | 2014-02-14 | 2025-04-01 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and electronic device |
Also Published As
Publication number | Publication date |
---|---|
US7253494B2 (en) | 2007-08-07 |
EP1632999A1 (en) | 2006-03-08 |
EP1632999A4 (en) | 2008-08-06 |
CN1754260A (zh) | 2006-03-29 |
EP1632999B1 (en) | 2011-03-30 |
DE602004032023D1 (de) | 2011-05-12 |
CN100358144C (zh) | 2007-12-26 |
US20060113652A1 (en) | 2006-06-01 |
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