WO2006003791A1 - サーミスタ薄膜及びその形成方法 - Google Patents
サーミスタ薄膜及びその形成方法 Download PDFInfo
- Publication number
- WO2006003791A1 WO2006003791A1 PCT/JP2005/011021 JP2005011021W WO2006003791A1 WO 2006003791 A1 WO2006003791 A1 WO 2006003791A1 JP 2005011021 W JP2005011021 W JP 2005011021W WO 2006003791 A1 WO2006003791 A1 WO 2006003791A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thin film
- film
- thermistor
- thermistor thin
- metal oxide
- Prior art date
Links
- 239000010409 thin film Substances 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000010408 film Substances 0.000 claims abstract description 163
- 238000010438 heat treatment Methods 0.000 claims abstract description 104
- 239000013078 crystal Substances 0.000 claims abstract description 88
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims abstract description 62
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 61
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 34
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
- 238000004544 sputter deposition Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims description 102
- 229910052710 silicon Inorganic materials 0.000 claims description 43
- 239000010703 silicon Substances 0.000 claims description 43
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 42
- 229910052748 manganese Inorganic materials 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 238000009826 distribution Methods 0.000 claims description 17
- 229910018663 Mn O Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- FRIKWZARTBPWBN-UHFFFAOYSA-N [Si].O=[Si]=O Chemical compound [Si].O=[Si]=O FRIKWZARTBPWBN-UHFFFAOYSA-N 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- LKTAGGFTWLWIJZ-UHFFFAOYSA-N dioxosilane Chemical compound O=[Si]=O.O=[Si]=O LKTAGGFTWLWIJZ-UHFFFAOYSA-N 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 33
- 230000015572 biosynthetic process Effects 0.000 abstract description 25
- 229910000314 transition metal oxide Inorganic materials 0.000 abstract description 6
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 20
- 239000004065 semiconductor Substances 0.000 description 18
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 15
- 230000003647 oxidation Effects 0.000 description 14
- 238000007254 oxidation reaction Methods 0.000 description 14
- 230000008859 change Effects 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 241000652704 Balta Species 0.000 description 6
- 238000005336 cracking Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000003917 TEM image Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 4
- HKVFISRIUUGTIB-UHFFFAOYSA-O azanium;cerium;nitrate Chemical compound [NH4+].[Ce].[O-][N+]([O-])=O HKVFISRIUUGTIB-UHFFFAOYSA-O 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- -1 compound metal oxide Chemical class 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000000682 scanning probe acoustic microscopy Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000000992 sputter etching Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910018669 Mn—Co Inorganic materials 0.000 description 1
- 229910018651 Mn—Ni Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- IVUXTESCPZUGJC-UHFFFAOYSA-N chloroxuron Chemical compound C1=CC(NC(=O)N(C)C)=CC=C1OC1=CC=C(Cl)C=C1 IVUXTESCPZUGJC-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
- H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
- H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
- H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
- H01C17/06533—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/008—Thermistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
- H01L31/0264—Inorganic materials
- H01L31/0296—Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe
- H01L31/02966—Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe including ternary compounds, e.g. HgCdTe
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/09—Devices sensitive to infrared, visible or ultraviolet radiation
Definitions
- the present invention relates to a thermistor thin film used for an infrared detection sensor and a method for forming the thermistor thin film.
- thermopile type with thermocouples connected in series thermocouples connected in series
- pyroelectric type using the pyroelectric effect of a specific material thermocouples connected in series
- thermistor type using the resistivity temperature dependence of a specific metal oxide thermopile type using the pyroelectric effect of a specific material
- thermistor-type infrared detection elements are known to be able to obtain a high DC output, and to be suitable for downsizing and high integration, and can be expected to be low in price.
- Widely used as a temperature sensor for devices see, for example, Patent Document 4)
- a sensor formed by forming a thermistor thin film on a semiconductor substrate and applying various wirings has begun to attract attention. (For example, refer to Patent Document 5.) 0
- a thermistor thin film is formed on a semiconductor substrate, and various wirings are applied to produce an infrared detection sensor. Began to attract attention.
- the general structure of an infrared detection sensor using the thermistor thin film is as follows: a substrate, a thermal insulating film formed on the upper surface of the substrate, a thermistor thin film formed on the upper surface of the thermal insulating film, and an upper surface of the thermistor thin film. And a pair of electrodes.
- the resistance of the thermistor changes, and this resistance change is detected by a pair of electrodes so that the infrared light can be detected.
- an infrared absorption film is provided on the surface.
- the substrate is an insulating material other than SiZSiO.
- an (Al 2 O 3) substrate may be used.
- an (Al 2 O 3) substrate may be used.
- Thermistors include transition metal oxides such as Mn O, NiO, CoO, and Fe O, and Mn—Ni.
- a composite metal oxide, a Mn—Co composite metal oxide, a Mn—Co—Fe composite metal oxide, a Mn—Co—M composite metal oxide, or the like is used. Further, semiconductor such as polycrystalline silicon or amorphous silicon have also been used (e.g., see Patent Document 6.) 0 [0008] Then, per cent Te, the infrared detector of the thermistor type, suppress self-heating of the thermistor thin film It is hoped to do. Self-heating is a phenomenon in which the thermistor itself generates heat due to the current that flows through the electrode cap to measure resistance when the thermistor film is thin.
- the film thickness of the temperature sensitive part in the infrared detecting element using the silicon semiconductor is set to 0 .: m to: L m.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2000-121431 (Fig. 1)
- Patent Document 2 Japanese Patent Laid-Open No. 2000-121432 (FIG. 1)
- Patent Document 3 Japanese Patent Laid-Open No. 2000-131147 (Fig. 2)
- Patent Document 4 JP-A-6-137939
- Patent Document 5 JP-A-6-281750
- Patent Document 6 Japanese Unexamined Patent Publication No. 2000-49004
- Patent Document 7 Japanese Patent Laid-Open No. 2001-76903 (paragraph number 0010, FIG. 1)
- Patent Document 8 Japanese Unexamined Patent Publication No. 2000-348911 (paragraph number 0013, FIG. 1)
- Patent Document 9 Japanese Unexamined Patent Publication No. 2000-348903 (paragraph number 0016, FIG. 1)
- Patent Document 10 JP-A-6-29104 (Claims, Fig. 1)
- Patent Documents 1 to 3 the force of forming a thermistor thin film having a thickness of 0.6 m on a substrate by sputtering film formation while heating at 200 ° C.
- a thermist made of a transition metal oxide is used. Since the thermal resistance of the thin film is about 600 ° C after deposition, the characteristic values such as the resistance value and B constant necessary for an infrared sensor are appropriately given. It is confirmed that it does not become the value of the characteristic level of the bulk thermistor that has been baked at a high temperature (1000 ° C to 1100 ° C) after the thermistor powder has been baked and hardened.
- thermistor-type infrared detection elements are used in a temperature sensor that has a thermistor thin film formed on a semiconductor substrate and various functional elements are integrally formed on the same semiconductor substrate, thereby reducing the size and increasing the integration.
- a silicon substrate is used most often as a semiconductor substrate, it is mechanically deformed or cracked due to the difference in thermal expansion coefficient between the underlying insulating film formed on the silicon substrate and the composite metal oxide. Damage has occurred! It is difficult to obtain a healthy composite metal oxide thin film. That is, although the thermal expansion coefficient of the silicon substrate 4. a 15 X 10 _6 ZK, the thermal expansion coefficient of the silicon oxide to be used as the insulating film is about 0. 6 ⁇ 10 _6 ⁇ , contrast, Myuita- The coefficient of thermal expansion of Co-based composite metal oxides is about 13 X 10 _6 ZK, which is 20 times larger.
- a thermistor film having a transition metal oxide / physical strength is a force that appropriately imparts characteristic values such as resistivity and B constant necessary for an infrared sensor by heat treatment at around 600 ° C after film formation. If a mister thin film is sputtered at room temperature and then heat-treated at around 600 ° C, deformation, cracks, etc. due to the difference in thermal expansion coefficient between the underlying insulating film formed on the silicon substrate and the composite metal oxide As a result, mechanical damage occurs and it is difficult to obtain a good thermistor thin film.
- the thermistor thin film may be formed on the entire surface by sputtering as in Patent Document 7 to L0 described above.
- the thermistor thin film has predetermined electrical characteristics (such as resistivity and B constant (temperature coefficient between a resistance value at a certain temperature and a resistance value at a reference temperature)).
- the film forming conditions to obtain sufficient characteristics corresponding to the level of Balta thermistor that is, thermistor baked at a high temperature of about 1000 ° C to 1100 ° C after thermistor powder is baked and hardened) Is not found.
- the present invention has been made in view of the above-described problems.
- the occurrence of self-heating is suppressed, the mechanical strength and film uniformity are excellent, and a highly accurate pattern can be formed.
- a thermistor thin film capable of obtaining the electrical characteristics required for an external line detection sensor and a method for forming the thermistor thin film. It is an object to provide a method for reliably forming without causing mechanical breakage.
- the present invention employs the following configuration in order to solve the above problems.
- the thermistor thin film of the present invention comprises an Mn 2 O ⁇ film formed directly on a silicon dioxide (SiO 2) layer.
- a thermistor thin film comprising a crystal having a film thickness of 0.05-0.2 ⁇ m and the thermistor thin film comprising 90% or more of crystal grains having an aspect ratio of more than 0.5 and less than 2.0.
- an optimum thermistor film for an infrared detection sensor can be reliably obtained without causing mechanical damage such as deformation or cracking.
- the silicon dioxide silicon layer has a thickness of 0.1 to 0.5 m. Insufficient function as an insulating layer and plastic flow action This is to relieve the stress caused by the thermal expansion difference and to obtain a healthy thermistor thin film.
- thermistor thin film of the present invention it is preferable to use a thermistor thin film formed by using a silicon substrate as a substrate and forming the silicon substrate surface through the silicon dioxide-silicon layer.
- the thermistor thin film of the present invention is a MnO-CoO or MnO-CoO-FeO-based composite film formed by sputtering on a silicon dioxide layer at a temperature of 550 ° C or higher and 650 ° C or lower.
- 3 4 3 4 3 4 3 4 3 4 2 3 It consists of a mixed metal oxide film, and its film thickness is 0.2 m or more and 1.0 m or less.
- the silicon dioxide layer preferably has a thickness of 0.1 ⁇ m or more and 2.0 m or less. According to the present invention, a satisfactory thin film thermistor can be obtained by exerting a sufficient function as an insulating layer and relieving the stress caused by the difference in thermal expansion coefficient by utilizing the plastic flow action.
- the method for manufacturing a thin film thermistor and the thin film thermistor of the present invention are preferably formed on the surface of the silicon dioxide layered silicon substrate.
- a silicon substrate having a surface formed with a thermal oxide film is widely used as a substrate for manufacturing a semiconductor element, and can be easily obtained.
- a high-performance infrared detection element in which various semiconductor elements are integrally formed and various functions are added can be obtained.
- the thermistor thin film of the present invention is a Mn O—Co directly formed on an Al 2 O substrate.
- the film is characterized in that it is made of a crystal having a film thickness of 0.05 to 0.0 and an aspect ratio distribution of crystal grains having a standard deviation of 0.84 or less.
- thermistor thin film a crystal in which the difference in thermal expansion coefficient from the alumina substrate is taken into account by making the crystal within the above-mentioned film thickness setting range and the crystal grain aspect ratio distribution not more than the above standard deviation. Excellent in mechanical strength, and can obtain the same electrical characteristics as a NOREX thermistor At the same time, it is possible to obtain a film quality suitable as an infrared detection sensor capable of high-accuracy patterning.
- the thermistor thin film forming method of the present invention comprises a MnO-CoO or MnO-CoO-FeO-based composite having a film thickness of 0.05 to 0.2 ⁇ m on a silicon dioxide-silicon layer.
- a thermistor thin film formation method was adopted in which heat treatment was performed at a temperature of 550 ° C to 650 ° C in an air atmosphere or a mixed atmosphere of nitrogen and oxygen.
- a thermistor film having optimum characteristics for an infrared detection sensor can be reliably obtained without causing mechanical damage such as deformation or cracking.
- a silicon substrate having a silicon dioxide layer on the surface can be used.
- the rate of temperature rise during the heat treatment is set.
- the temperature is 8-12 ° CZmin and the temperature drop rate is 2-6 ° CZmin.
- a composite metal oxide film having internal stresses of compression and tension is formed on a silicon dioxide layer in the as-sputtered state, and then a composite having only tensile internal stress by heat treatment. It is preferable to use a metal oxide film. This is to obtain a healthy thermistor thin film without distortion or cracks.
- a composite metal oxide comprising a crystal in which 90% or more of crystal grains having an aspect ratio of more than 1.0 and less than 5.0 are present on a silicon dioxide layer in the as-sputtered state. It is preferable to form a composite metal oxide film composed of crystals in which 90% or more of the crystal grains having an aspect ratio of more than 0.5 and less than 2.0 are formed by heat treatment after forming the material film.
- a thermistor thin film having a thickness of 0.2 m or more and 1.0 ⁇ m or less can be reliably obtained without causing mechanical damage such as deformation or cracking. Therefore, it is possible to obtain a thermistor film having the same resistance value and B constant as a bulk thermistor, suppressing self-heating, and having optimum characteristics for an infrared detection sensor.
- a metal mask layer forming step of forming a metal mask layer having a predetermined opening on the silicon dioxide layer, and the metal mask layer after the sputtering step is preferable that the metal mask layer be formed of a metal material having a melting point higher than 650 ° C. /.
- a thermistor thin film having a desired shape can be formed by using a metal mask having heat resistance to a heating temperature of 550 ° C or higher and 650 ° C or lower in the sputtering process. . This is because Mn O -Co O or even on the silicon dioxide layer
- An MnO-CoO-FeO-based composite metal oxide film is formed and etched.
- the shape of the end face of the thermistor thin film is smooth, and it is easy to suppress disconnection when the wired electrode descends the stepped portion.
- the metal mask layer is formed of Cr! /.
- Cr has a melting point of 1860 ° C. and has heat resistance to the temperature heated in the sputtering process.
- the metal mask layer can be removed without dissolving the silicon dioxide layer formed as the underlayer.
- the thermistor thin film forming method and thermistor thin film of the present invention are preferably formed on the surface of the silicon dioxide layered silicon substrate.
- a silicon substrate having a surface formed with a thermal oxide film is widely used as a substrate for manufacturing a semiconductor element, and can be easily obtained.
- a high-performance infrared detection element in which various semiconductor elements are integrally formed and various functions are added can be obtained.
- the film thickness is 0.05 to 0.3 on the Al 2 O substrate.
- heat treatment is performed at a temperature of 550 ° C. to 650 ° C. in an air atmosphere or a mixed atmosphere of nitrogen and oxygen.
- the heat treatment is performed within the above temperature range, so the aspect ratio distribution of the crystal grains has a standard deviation of 0.84 or less. Crystals with little variation in crystal grain size can be obtained, with excellent mechanical strength considering the difference in thermal expansion coefficient from the alumina substrate, and electrical characteristics similar to Balta's thermistors (resistivity and B constant) Etc.).
- the method for producing the thermistor thin film of the present invention is characterized in that the temperature rising rate during the heat treatment is 8 to 12 ° C Zmin and the temperature lowering rate is 2 to 6 ° C Zmin. That is, in this method of manufacturing the thermistor thin film, heat treatment is performed by controlling the rate of temperature rise and temperature fall within the above ranges, thereby preventing the occurrence of damage such as cracks and the necessary resistance for the infrared detection sensor. Rate and B constant can be obtained. If the temperature rise and fall temperature are out of the above ranges, the heat treatment efficiency is deteriorated and thermal stress is generated, making it difficult to obtain a good thermistor thin film.
- the method for forming the thermistor thin film of the present invention is a sputter-like method on the Al 2 O substrate.
- the aspect ratio distribution of the crystal grains is standard deviation by the heat treatment.
- the composite metal oxide film is composed of 0.8 or less crystals. That is, in this method of forming the thermistor thin film, the thermal expansion coefficient with the alumina substrate is obtained by forming a composite metal oxide film composed of crystals having a crystal grain aspect ratio distribution of 0.84 or less by the heat treatment. Excellent mechanical strength considering the difference between the two, preventing the occurrence of damage such as cracks, and obtaining the necessary resistivity and B constant for infrared detection sensors
- FIG. 1 shows a silicon substrate on which a thermistor thin film is formed according to an embodiment of the present invention. It is a schematic perspective view which shows.
- FIG. 2 is a graph showing the relationship between the heat treatment temperature and resistivity of the thermistor thin film of the present invention.
- FIG. 3 is a graph showing the relationship between the heat treatment temperature and the B constant of the thermistor thin film of the present invention.
- Figure 4 shows the relationship between the film thickness of the thermistor thin film and the crack generation rate.
- FIG. 5 is a diagram showing an example of internal stress in the film in the as-sputtered state.
- FIG. 6 is a diagram showing an example of internal stress in the film after heat treatment.
- FIG. 7 is a diagram showing the internal stress in the film in the as-sputter state of the present invention.
- FIG. 8 is a diagram showing the internal stress in the film after the heat treatment of the present invention.
- FIG. 9 is a process diagram showing the method for forming the thermistor thin film of the present invention.
- FIG. 10 is a diagram showing a cross section of the thin film in the as-sputtered state of the present invention.
- FIG. 11 is a diagram showing the crystal grain size in the as-sputter state of the present invention.
- FIG. 12 is a diagram showing the aspect ratio of crystals in the as-sputtered state of the present invention.
- FIG. 13 is a view showing a cross section of the thin film after the heat treatment of the present invention.
- FIG. 14 is a graph showing the crystal grain size after the heat treatment of the present invention.
- FIG. 15 is a view showing the aspect ratio of the crystal after the heat treatment of the present invention.
- FIG. 16 is a schematic perspective view showing an alumina substrate on which a thermistor thin film according to one embodiment of the present invention is formed.
- FIG. 17 is a graph showing the relationship between the heat treatment temperature and the resistivity during sputtering in the thermistor thin film and method for forming the thermistor according to the present embodiment.
- FIG. 18 is a graph showing the relationship between the heat treatment temperature during sputtering and the B constant in this embodiment.
- FIG. 19 is a graph showing the relationship between the film thickness of the thermistor thin film and the crack generation rate in this embodiment.
- FIG. 20 is an enlarged cross-sectional view showing the thin film in the as-sputtered state in this embodiment.
- FIG. 21 is a graph showing the crystal grain size in the as-sputtered state in the present embodiment.
- FIG. 22 shows the aspect ratio of the crystal in the as-sputtered state in this embodiment. It is a graph.
- FIG. 23 is an enlarged cross-sectional view showing a thin film after heat treatment in the present embodiment.
- FIG. 24 is a graph showing the crystal grain size after heat treatment in the present embodiment.
- FIG. 25 is a graph showing the aspect ratio of the crystal after heat treatment in the present embodiment.
- the thermistor thin film 1 according to the present embodiment is used for an infrared detection element.
- SiO layer A compound metal oxide, a silicon dioxide layer formed on the silicon substrate 2 (hereinafter referred to as SiO layer).
- the thermistor thin film 1 is composed of (Mn, Co) O.
- the molar ratio of Mn to Co is about 4: 6.
- the thermistor thin film 1 is composed of (Mn, Co, Fe) O, Mn
- the appropriate molar ratio of Co: Fe is (20 to 60): (2 to 65): (9 to 40).
- These composite metal oxide thin films have the properties of a semiconductor, and have a property that resistance decreases as temperature rises.
- a composite metal oxide thermistor thin film exhibits optimum electrical characteristics for an infrared detection sensor by performing a predetermined heat treatment after film formation.
- Figure 2 shows the heat treatment temperature and resistance of Mn O— Co 2 O (40 mol%: 60 mol%) composite metal oxide.
- Figure 3 also shows the relationship between the heat treatment temperature and the B constant.
- Figure 2 Figure 3 shows a 1-hour heat treatment of a 0.2 m thick sputtered film of silicon dioxide (SiO 2) layer.
- the electrical characteristics expected of the thermistor thin film are the same as the Balta level.
- the resistivity R is 3.5 kQ, cm or less. 2.
- B constant is B25Z50 value 3, 500-3, 60
- this composite metal oxide thermistor thin film has a resistivity R of 10 to 20 k Q 'cm in the as-sputtered state, and the resistivity R decreases as the heat treatment temperature increases.
- the B constant is 4,000-4,500K. The higher the heat treatment temperature, the lower the B25Z50 value.
- the target electrical characteristics can be obtained by heat treatment in a temperature range of 600 ° C. ⁇ 50 ° C.
- a composite metal oxide thermistor thin film is formed on the surface of a semiconductor substrate such as a silicon substrate by a sputtering method through an insulating film made of a silicon oxide film. After that, a predetermined heat treatment is performed to achieve desired electrical characteristics.
- the silicon dioxide layer as the underlayer and (Mn, Co) 2 O or (Mn, Co, Fe)
- the present inventors have a thermal expansion coefficient of (1 to: L0) X 10 — 6 ZK and a composite metal oxide thermistor thin film on the surface of a silicon substrate having an oxide film. And a composite metal oxide thermistor thin film through an acid-aluminum (Al ⁇ ) film, which is only a few times different from
- a (Mn, Co) O-based composite metal oxide thermistor thin film is formed on the surface of the Al layer.
- (Mn, Co) O-based composite metal oxidation is carried out through the silicon dioxide layer on the silicon substrate surface.
- a thermistor thin film was directly formed, it was found that a healthy composite metal oxide thermistor thin film capable of withstanding a heat treatment temperature of 600 ° C was obtained. In this case, it was also found that cracks tend to occur as the composite metal oxide thermistor thin film becomes thicker.
- Fig. 4 shows a (Mn, Co) O-based complex metal oxide thermistor thin film directly on the silicon dioxide layer.
- the film thickness should be kept below 0. It has been found that it may be formed directly on the silicon layer by sputtering.
- a film thickness of 0.05 / zm or more is required. If the film thickness is less than 0.05 ⁇ m, a uniform and healthy film cannot be obtained.
- a silicon dioxide film having a thickness of 0.5 m is formed on a silicon substrate having a diameter of 100 mm by thermal oxidation, and that a silicon substrate having a diameter of 100 mm is also thick.
- a silicon dioxide film having a thickness of 0.5 / zm was formed by thermal oxidation, and a thickness of 0.1 l / zm AlO was further formed thereon by spin coating.
- a 2 m (Mn, Co) O film was formed and heat-treated at 600 ° C for 60 minutes in the as-sputtered state.
- Fig. 5 shows the condition in the as-sputtered state when a (Mn, Co) 2 O film is formed on the surface of the Al 2 O layer.
- the horizontal axis is the distance from the substrate center (unit: mm), and the vertical axis is the stress (arbitrary unit).
- the horizontal axis is the distance from the substrate center (unit: mm)
- the vertical axis is the stress (arbitrary unit).
- Figure 6 shows the results measured after heat treatment. When heat treatment is applied, a high tensile stress is obtained that is almost constant in the radial direction of the substrate.
- Figs. 7 and 8 directly form a (Mn, Co, Fe) O film on the surface of the silicon dioxide silicon film.
- FIG. 7 shows the results of the as-sputtered state
- FIG. 8 shows the measurement results after the heat treatment.
- the film is formed directly on the surface of the silicon dioxide silicon film
- the internal stress is changed from the tensile stress to the compressive stress due to the radial inner force of the substrate being directed outward in the as-sputtered state.
- this is heat-treated, as shown in FIG. 8, it becomes a substantially constant tensile stress in the radial direction of the substrate.
- the stress level is slightly lower than the sample with the Al 2 O layer.
- the sample without Al O layer is almost constant in the radial direction of the substrate.
- the stress level is slightly lower than that of the sample with the Al 2 O layer. That is,
- the silicon dioxide silicon film undergoes plastic flow (reflow) during heat treatment, and (Mn, Co) O
- the thickness of the silicon dioxide layer that causes such plastic flow (reflow) needs to be 0.1 to 0.5 m. With such a thickness, a sufficient function as an insulating layer can be exhibited, and a stress caused by a difference in thermal expansion can be relieved using a plastic flow action to obtain a healthy thermistor thin film.
- the silicon dioxide (SiO 2) layer is formed by thermally oxidizing the silicon substrate surface.
- an SiO film is formed as an insulating film on the surface of the silicon substrate, and various elements are formed on the SiO film to provide electrical connection between the elements.
- hydrochloric acid method in which hydrochloric acid gas is added together with oxygen gas.
- the thickness of the SiO layer formed by the thermal oxidation method depends on the oxidation treatment temperature and time.
- the silicon dioxide (SiO 2) layer is formed not only on the silicon substrate but also on an alumina or glass substrate.
- This method for forming the thermistor thin film comprises a metal mask layer forming step, a sputtering step, and a lift-off step! RU
- a metal mask forming step is performed.
- a SiO layer 3 is formed on the surface of the silicon substrate 2 by a thermal oxidation method (see FIG. 9 (a)), and further, an upper surface of the SiO layer 3 is formed by a sputtering method.
- a (Mn, Co) 2 O film is formed by sputtering while heating to 50 ° C (see Fig. 9 (f)).
- the thermistor thin film 1 is left in the part (see Fig. 9 (g)).
- the thermistor thin film 1 is manufactured as described above, and the electric resistance for electric resistance measurement is further formed thereon. Wire the poles. After that, the protective film and other thin films necessary for the sensor structure are sequentially stacked.
- FIG. 10 shows a TEM image of a cross section of the thermistor thin film 1 in the as-sputtered state.
- the thermistor thin film 1 of the present invention is deposited on the surface of the SiO layer 3
- Figure 11 shows the results of measuring the dimensions of this fine crystal.
- curve (a) shows the crystal dimensions of a cross section parallel to the substrate surface
- curve (b) shows the crystal dimensions of a vertical cross section perpendicular to the substrate surface (that is, the growth direction of the thermistor thin film).
- the crystal dimensions of the cross section parallel to the substrate surface are concentrated to 40 nm or less, and the crystal dimensions of the vertical cross section perpendicular to the substrate surface are scattered from 40 nm to 140 nm.
- the aspect ratio shown in FIG. 12 is indicated by the value obtained by dividing the crystal grain size in the depth direction of the substrate by the crystal grain size in the diameter direction of the substrate.
- the thermistor thin film in the as-sputtered state is mainly composed of crystals with an aspect ratio greater than or equal to the direction of the film growth.
- FIG. 14 shows the results of measuring the crystal dimensions
- FIG. 15 shows the aspect ratio.
- the crystal grows greatly and becomes rounded by heat treatment.
- each direction of the crystal grains extends from about 40 nm to about 180 nm.
- the aspect ratio shown in Fig. 15 the average is 1.34, and the crystal grains with an aspect ratio of more than 0.5 and less than 2.0 account for 90% or more, and there are many crystal grains that are almost square. ing.
- the resistivity R is equal to or less than Balta 'thermistor R: 3.5 k ⁇ ⁇ cm or less 2.
- Balta 'thermistor R 3.5 k ⁇ ⁇ cm or less 2.
- the sputter film formation is performed while heating within the range of 600 ° C. ⁇ 50 ° C.
- the thermistor thin film 1 which is a thick film can be reliably obtained without causing mechanical damage such as deformation or cracking. Therefore, it is possible to obtain a thermistor film having the same resistance value and B constant as the bulk thermistor, suppressing self-heating, and having optimum characteristics for an infrared detection sensor.
- the shape of the end face of the thermistor thin film 1 becomes smoother, and the wired electrode has a stepped portion. It becomes easy to suppress disconnection when getting down.
- the metal mask layer 6 is formed of Cr which is soluble in the cerium nitrate ammonium solution, the SiO layer 3 is not melted in the lift-off process.
- the heating rate is 8 to 12 ° C. Zmin and the cooling rate is 2 to 6 ° C. Zmin during the heat treatment after film formation. If the rate of temperature rise or fall is outside the above range, the heat treatment efficiency will deteriorate, and thermal stress will occur, making it difficult to obtain a healthy thermistor film.
- the thermistor thin film when the heat treatment temperature is changed is dug by sputter etching.
- the change of oxygen concentration in the thin film was investigated. As a result, even if the heat treatment temperature was changed, the oxygen concentration profile was not changed from that immediately after film formation, and the oxygen composition was not changed by the heat treatment.
- the thickness of a silicon substrate 2 having a diameter of 100 mm is 0.5 by dry O thermal oxidation.
- a SiO layer 3 of / z m was formed.
- the thermistor thin film 1 composed of The sputtering film formation conditions were as follows: the target was placed on the lower side, the silicon substrate 2 was placed on the upper side with a spacing of 60 mm, the atmospheric pressure was lOmTorr, and a high frequency current of 150 W was applied at an argon flow rate of 50 sccm.
- the obtained thermistor thin film 1 was uniform over the entire surface of the substrate, and no cracks were observed.
- the resistance force was 4879-5367kQ-cm, the B constant (B25 / 50 value) force was 3770-3849K.
- a silicon dioxide (SiO 2) layer was formed.
- this silicon substrate was mounted on a normal sputtering apparatus, and had a diameter of 125 mm and MnO.
- a complex oxide target with a molar ratio of 0% to 60% for Co O, a thickness of 0.
- a (Mn, Co) O composite oxide thermistor thin film was formed. Sputter deposition conditions are the target
- a silicon substrate was placed on the lower side with a spacing of 60 mm on the upper side, the atmospheric pressure was lOmTorr, the argon flow rate was 50 SCCM, and 150 W of high frequency power was applied to form a film.
- Heat treatment was performed for 60 minutes in an atmosphere controlled to a temperature range of 600 ⁇ 5 ° C.
- the resistivity was 3. OkQ ⁇ cm and the B constant (B25Z50 value) was 3,550K.
- the thermistor thin film 1 of this embodiment is formed on an alumina (Al 2 O 3) substrate 12 as shown in FIG.
- the molar ratio of Mn to Co is suitably about 4: 6.
- the molar ratio of Mn: Co: Fe is (20-60): (2-65) : (9-40) is appropriate.
- This thermistor thin film 1 has the properties of a semiconductor, and has a negative characteristic in which the resistance decreases as the temperature rises, that is, a so-called NTC thermistor (Negative Temperature Coefficient Themistor) property.
- a thermistor thin film that is a composite metal oxide exhibits electrical characteristics suitable for an infrared detection sensor by performing a predetermined heat treatment after film formation.
- a composite metal oxide of Mn O Co O (40 mol%: 60 mol%) is formed on the alumina substrate 2.
- the film is formed by sputtering to a thickness of 0. and subjected to heat treatment for 1 hour.
- the sputtering film forming conditions for example, in this embodiment, the film was formed by applying an atmospheric pressure of 10 mTorr, an argon flow rate of 50 SCCM, and a high frequency power of 150 W.
- FIG. 17 shows the relationship between the heat treatment temperature and the resistivity of the composite metal oxide film at this time.
- Figure 18 also shows the relationship between the heat treatment temperature and the B constant.
- the heat treatment is performed in an air atmosphere or a mixed atmosphere of nitrogen and oxygen. In the heat treatment, the rate of temperature rise is 8 to 12 ° CZmin and the rate of temperature drop is 2 to 6 ° CZmin.
- the temperature rise and fall temperature of the heat treatment is set in the above range. If the temperature is out of the set range, the heat treatment efficiency is deteriorated and thermal stress is generated to obtain a good thermistor thin film 1. This is because it cannot be done.
- the electrical characteristics of the thermistor thin film for the infrared detection sensor used in the experiment in this embodiment are similar to the level of Balta 'thermistor, and the resistivity is 3.5 k Q' cm or less 2. Ok Q • cm In the range, the B constant is about 3500-3600K with B25Z50 value.
- this thermistor thin film 1 has a resistivity of about 9 to 17 k Q 'cm in the as-sputtered state, and the resistivity decreases as the heat treatment temperature increases up to about 600 ° C.
- the B constant is about 4000 to 4500K in the as-sputtered state, and the higher the heat treatment temperature, the higher the constant ( ⁇ 25 ⁇ 50 value).
- the present inventors have been able to find a film thickness range in which cracks and the like do not occur even in the heat treatment in the above temperature range in consideration of the influence of the difference in thermal expansion coefficient.
- Fig. 19 shows a thermistor thin film of (Mn, Co) O-based mixed metal oxide on an alumina substrate 12 1
- the relationship between the thickness of the thermistor thin film and the rate of occurrence of cracks is shown when the film is directly formed and heat-treated at 600 ° C.
- a film thickness of not less than 0 is required. Furthermore, if the film thickness is set to an extremely thin thickness of less than 0.05 m, self-heating of the thermistor thin film becomes prominent and greatly affects the detection accuracy, so the film thickness should be 0.05 ⁇ m or more. Favored ,.
- FIG. 20 An electron microscope (transmission electron microscope) image is shown in FIG.
- the band-shaped cross section is the cross section of the thermistor thin film 1 in the as-sputtered state
- the lower cross section is the alumina substrate 12.
- Figure 21 shows the results of measuring the size of the fine crystal observed in the TEM image.
- the curve (a) in FIG. 6 shows the crystal dimension of a cross section parallel to the substrate surface
- the curve (b) shows the crystal dimension of a vertical section (that is, the film growth direction) perpendicular to the substrate surface. Is shown.
- the crystal dimensions of the cross section parallel to the substrate surface are concentrated to 40 nm or less, and the crystal dimensions of the vertical cross section perpendicular to the substrate surface vary from 40 nm to 140 nm. ing.
- the results are shown in Fig. 7 in terms of aspect ratio. Note that the aspect ratio shown in FIG. 22 is a value obtained by dividing the crystal grain size in the depth direction of the substrate by the crystal grain size in the diameter direction of the substrate.
- FIG. 23 shows a TEM image of the crystal after the composite metal oxide film was heat-treated at 600 ° C. for 1 hour in the same manner as described above.
- the band-shaped cross section is the cross section of the thermistor thin film 12 after the heat treatment, and the lower cross section is the alumina substrate 12.
- Figure 24 shows the results of measuring the size of the fine crystals observed in the TEM image.
- FIG. 25 shows the result of converting the result into an aspect ratio.
- the thermistor thin film 11 is also subjected to heat treatment so that the crystal grain aspect ratio distribution has a standard deviation ( ⁇ ) of 0.84 or less.
- ⁇ standard deviation
- the cross-sectional dimension is distributed to about 50 nm centered on 20 nm
- the vertical cross-sectional dimension is distributed to about 120 nm centered on 40 nm.
- the thermistor thin film 1 has an average aspect ratio of 2.52, a composite metal oxide comprising crystals in which the aspect ratio exceeds 1.0 and 91% of the grains are less than 4.0. It is a porcelain film.
- the in-plane concentration distribution of Mn, Co, Fe, C, and O elements was measured by X-ray photoelectron spectroscopy (XPS).
- XPS X-ray photoelectron spectroscopy
- the thermistor thin film 11 when the heat treatment temperature was changed was dug down by sputter etching, and the change in oxygen concentration in the thermistor thin film 1 was examined. As a result, it was found that even when the heat treatment temperature was changed, the oxygen concentration profile was not changed from that immediately after the film formation, and the oxygen composition was changed by the heat treatment.
- a Cr layer is first formed on the alumina substrate 12 by sputtering, and a photoresist layer is then patterned on the Cr layer by photolithography technology. To do. Then, the exposed portion of the Cr layer is selectively removed by wet etching to form a metal mask layer having a pattern that opens only in a predetermined region where the thermistor thin film 11 is formed, and then the photoresist layer is removed.
- the thermistor thin film 1 is formed by forming a composite metal oxide film on the exposed surface of the alumina substrate 12 and the metal mask layer surface under the sputtering conditions described above.
- the cerium nitrate solution is used as an etchant in the lift-off process to dissolve the Cr metal mask layer, and the thermistor thin film 1 is applied to the exposed surface of the alumina substrate 12 where the metal mask layer is not formed.
- the pattern of the thermistor thin film 11 is left.
- the thermistor thin film 11 of the present embodiment has a film thickness of 0.05-0.3 m, which is thinner than the conventional film, so that it is easy to remove unnecessary portions through the lift-off process.
- the thermistor thin film 11 can be removed.
- an electrode for measuring electrical resistance is wired on the thermistor thin film 11, and a protective film, an infrared absorption film, and the like are sequentially laminated as necessary to produce an infrared detection sensor.
- a crystal having a film thickness of 0.05 to 0. 0 and a crystal grain aspect ratio distribution exceeding the standard deviation of 1.00 in the as-sputtered state By forming a strong composite metal oxide film, it is possible to obtain the thermistor thin film 11 composed of crystals having an aspect ratio distribution of crystal grains of standard deviation of 0.84 or less.
- this thermistor thin film 11 since the aspect ratio distribution of the crystal grains is within the above standard deviation within the above film thickness setting range, the coefficient of thermal expansion with the alumina substrate 12 is low. In addition to being excellent in mechanical strength considering the difference, it is possible to obtain the same electrical characteristics as a Balta's thermistor and to obtain a film quality suitable as an infrared detection sensor. In addition, since the film thickness is thinner than conventional ones, it is possible to perform patterning with high accuracy.
- the thermistor thin film 11 of the present embodiment is used for an infrared detection sensor, it is possible to further improve the performance and size of the sensor.
- the SiO layer 3 is formed on the upper surface of the silicon substrate 2.
- the thermistor thin film of the present invention When used, it has electric characteristics (resistivity, B constant, etc.) equivalent to those of a bulk thermistor, and mechanical damage such as self-heating, deformation and cracking is suppressed.
- a thermistor thin film suitable for infrared detection sensors can be obtained, contributing to higher performance and miniaturization of the sensor.
- a thermistor excellent in mechanical strength and film uniformity capable of high-accuracy patterning, and excellent in reproducibility between deposition batches. A thin film is obtained.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Manufacturing & Machinery (AREA)
- Thermistors And Varistors (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067027852A KR101121399B1 (ko) | 2004-06-18 | 2005-06-16 | 서미스터 박막 및 그 형성 방법 |
CN2005800195136A CN1969345B (zh) | 2004-06-18 | 2005-06-16 | 热敏电阻薄膜及其形成方法 |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-181301 | 2004-06-18 | ||
JP2004181301 | 2004-06-18 | ||
JP2005041298 | 2005-02-17 | ||
JP2005-041298 | 2005-02-17 | ||
JP2005-144921 | 2005-05-18 | ||
JP2005144921A JP2006032910A (ja) | 2004-06-18 | 2005-05-18 | サーミスタ薄膜及びその形成方法 |
JP2005147142A JP2006324520A (ja) | 2005-05-19 | 2005-05-19 | サーミスタ薄膜及びその製造方法 |
JP2005-147142 | 2005-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006003791A1 true WO2006003791A1 (ja) | 2006-01-12 |
Family
ID=35782603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011021 WO2006003791A1 (ja) | 2004-06-18 | 2005-06-16 | サーミスタ薄膜及びその形成方法 |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR101121399B1 (ja) |
CN (1) | CN1969345B (ja) |
TW (1) | TW200605101A (ja) |
WO (1) | WO2006003791A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008084991A (ja) * | 2006-09-26 | 2008-04-10 | Mitsubishi Materials Corp | サーミスタ薄膜及び薄膜サーミスタ素子 |
CN108168723A (zh) * | 2017-12-22 | 2018-06-15 | 雷念程 | 一种薄膜温度传感器芯片及其制造方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101768168B1 (ko) | 2015-05-29 | 2017-08-17 | 한국세라믹기술원 | 유연성 박막 서미스터 제조방법 및 온도 센서 |
CN109484039B (zh) * | 2018-12-03 | 2020-03-24 | 山东华菱电子股份有限公司 | 一种热敏打印头用发热基板的制造方法 |
EP3854765A4 (en) * | 2018-12-28 | 2022-07-13 | Murata Manufacturing Co., Ltd. | COMPOSITE MATERIAL, STRUCTURE AND THERMISTOR WITH IT |
JP7134920B2 (ja) * | 2019-06-17 | 2022-09-12 | 日立Astemo株式会社 | 熱式センサ装置 |
CN112366052A (zh) * | 2020-11-09 | 2021-02-12 | 肇庆市金龙宝电子有限公司 | 一种医疗体温测量用高精度热敏电阻芯片及其制备方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08306508A (ja) * | 1995-05-08 | 1996-11-22 | Nippondenso Co Ltd | 薄膜型サーミスタ素子およびその製造方法 |
JP2000348905A (ja) * | 1999-06-03 | 2000-12-15 | Matsushita Electric Ind Co Ltd | 薄膜サーミスタ素子および薄膜サーミスタ素子の製造方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60208803A (ja) | 1984-04-02 | 1985-10-21 | 株式会社日立製作所 | 薄膜サ−ミスタの製造方法 |
CN1046049C (zh) * | 1996-12-14 | 1999-10-27 | 中国科学院新疆物理研究所 | 氧化物半导体热敏电阻器的制造方法 |
JPH10256004A (ja) | 1997-03-11 | 1998-09-25 | Shibaura Denshi:Kk | 薄膜サーミスタ |
JP4279399B2 (ja) * | 1999-06-03 | 2009-06-17 | パナソニック株式会社 | 薄膜サーミスタ素子および薄膜サーミスタ素子の製造方法 |
-
2005
- 2005-06-16 KR KR1020067027852A patent/KR101121399B1/ko active IP Right Grant
- 2005-06-16 CN CN2005800195136A patent/CN1969345B/zh not_active Expired - Fee Related
- 2005-06-16 WO PCT/JP2005/011021 patent/WO2006003791A1/ja active Application Filing
- 2005-06-17 TW TW094120307A patent/TW200605101A/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08306508A (ja) * | 1995-05-08 | 1996-11-22 | Nippondenso Co Ltd | 薄膜型サーミスタ素子およびその製造方法 |
JP2000348905A (ja) * | 1999-06-03 | 2000-12-15 | Matsushita Electric Ind Co Ltd | 薄膜サーミスタ素子および薄膜サーミスタ素子の製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008084991A (ja) * | 2006-09-26 | 2008-04-10 | Mitsubishi Materials Corp | サーミスタ薄膜及び薄膜サーミスタ素子 |
CN108168723A (zh) * | 2017-12-22 | 2018-06-15 | 雷念程 | 一种薄膜温度传感器芯片及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1969345A (zh) | 2007-05-23 |
KR20070029219A (ko) | 2007-03-13 |
CN1969345B (zh) | 2011-10-05 |
KR101121399B1 (ko) | 2012-03-21 |
TW200605101A (en) | 2006-02-01 |
TWI371762B (ja) | 2012-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2006324520A (ja) | サーミスタ薄膜及びその製造方法 | |
WO2006003791A1 (ja) | サーミスタ薄膜及びその形成方法 | |
WO2016138840A1 (zh) | 一种铜热电阻薄膜温度传感器芯片及其制备方法 | |
KR101886400B1 (ko) | 박막 서미스터 소자 및 그 제조 방법 | |
CN110132445B (zh) | 一种负温度系数电阻型深低温温度传感器及制备方法 | |
JP4811316B2 (ja) | 薄膜サーミスタ素子及び薄膜サーミスタ素子の製造方法 | |
JP2008084991A (ja) | サーミスタ薄膜及び薄膜サーミスタ素子 | |
JP4811552B2 (ja) | 超伝導素子を用いた中性子検出装置 | |
JP2007232669A (ja) | 温度センサおよびその製造方法 | |
KR100990798B1 (ko) | 산화성 가스센서 | |
JP2006032910A (ja) | サーミスタ薄膜及びその形成方法 | |
JPH11271145A (ja) | ボロメータ用検知膜とその製造方法、及びボロメータ素子 | |
JP2018169248A (ja) | 温度センサ及びその製造方法 | |
KR101078208B1 (ko) | 볼로미터용 니켈 산화막 및 그의 제조방법, 니켈 산화막을 이용한 적외선 감지소자 | |
JP5029885B2 (ja) | 薄膜サーミスタ素子及びその製造方法 | |
US6602428B2 (en) | Method of manufacturing sensor having membrane structure | |
JP2007287812A (ja) | サーミスタ薄膜及び赤外線検出用センサ並びにこれらの製造方法 | |
JP2019096805A (ja) | サーミスタ及びその製造方法並びにサーミスタセンサ | |
JP2006261655A (ja) | 薄膜サーミスタの製造方法及び薄膜サーミスタ | |
TWI809689B (zh) | 微測輻射熱計和其製造方法 | |
JP2002008905A (ja) | 感温抵抗材料とその製造方法及び感温抵抗材料を用いた赤外線センサ | |
JP2007109781A (ja) | サーミスタ薄膜及びその製造方法 | |
JP2002267530A (ja) | 赤外線検知素子の製造方法及び赤外線検知素子 | |
JP2008258387A (ja) | 薄膜サーミスタ及び薄膜サーミスタの製造方法 | |
JP2011171596A (ja) | 薄膜サーミスタ素子 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 200580019513.6 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020067027852 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 1020067027852 Country of ref document: KR |
|
122 | Ep: pct application non-entry in european phase |