WO2000044050A1 - Reseau de detecteurs thermiques de rayonnements electromagnetiques et procede de fabrication de celui-ci - Google Patents
Reseau de detecteurs thermiques de rayonnements electromagnetiques et procede de fabrication de celui-ci Download PDFInfo
- Publication number
- WO2000044050A1 WO2000044050A1 PCT/FR2000/000120 FR0000120W WO0044050A1 WO 2000044050 A1 WO2000044050 A1 WO 2000044050A1 FR 0000120 W FR0000120 W FR 0000120W WO 0044050 A1 WO0044050 A1 WO 0044050A1
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- WIPO (PCT)
- Prior art keywords
- layer
- mechanical
- detector
- micro
- detectors
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005670 electromagnetic radiation Effects 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 20
- 238000005530 etching Methods 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 8
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 5
- 238000000206 photolithography Methods 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 230000036961 partial effect Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 description 18
- 238000011049 filling Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 239000012705 liquid precursor Substances 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000005546 reactive sputtering Methods 0.000 description 1
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- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- G01J5/02—Constructional details
-
- 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
- G01J5/02—Constructional details
- G01J5/0225—Shape of the cavity itself or of elements contained in or suspended over the cavity
- G01J5/023—Particular leg structure or construction or shape; Nanotubes
-
- 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
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components 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
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14665—Imagers using a photoconductor layer
- H01L27/14669—Infrared imagers
Definitions
- the present invention relates to a device for thermal detection of electromagnetic radiation, 0 and to a method of manufacturing the same.
- An electromagnetic radiation detector based on the principle of thermal detection as shown diagrammatically in FIG. 1 generally consists of different sub-assemblies which carry out the four essential functions necessary for the detection of radiation, namely: - a function absorption:
- the absorption function converts the energy of the incident electromagnetic wave, which is characteristic of the temperature and emissivity of the scene observed, into a heating of the detection structure.
- the parameters that characterize this function are:
- the relative absorption (Ar) which defines the ratio of the luminance of the incident radiation to the luminance actually absorbed by the absorbing structure.
- a quarter-wave resonant optical cavity makes it possible to obtain a relative absorption close to the ideal value of 100%.
- the filling factor (Fr) which is the ratio of the useful surface actually participating in the heating of the detector to the total area of it. Filling factors of the order of 50% are thus obtained.
- Optimizing the absorption function therefore essentially consists in maximizing these parameters Fr and Ar.
- thermometer function
- thermometer is an element of which one of the physical characteristics is sensitive to temperature. It can be the electrical resistivity of the material in the case of resistive bolometers, the conductivity of semiconductor devices, the residual polarization in the case of a pyroelectric detector, the dielectric constant in the case of a ferroelectric detector, etc.
- the essential quality factor that characterizes the function of a thermometer is the relative variation of the physical quantity observed with temperature. For a resistive bolometer with resistance R, this quality factor is expressed by dR / R.dT, otherwise noted TCR. Optimizing the thermometer consists of maximizing this parameter.
- thermometer is thermally isolated from its environment, for example by placing the thermometer on a membrane suspended above a substrate, according to an architecture called "micro-bridge", which is thermally isolated on the one hand by integrating the detector into an environment under reduced gas pressure and on the other hand, by inserting a specific thermal insulation device between the micro-bridge supporting the thermometer and the downstream signal processing circuit.
- the characteristic thermal parameters are on the one hand the thermal impedance Rth which must be maximized in order to improve the sensitivity of the detector and on the other hand, the capacity calorific Cth which translates the thermal inertia of the thermometer which must be minimized in order to reduce the response time of the detector to a variation in the incident flux.
- the response time which is proportional to the product Rth x Cth is typically from a few milliseconds to a few tens of milliseconds. In order to achieve a sensitive and rapid detector at the same time, it is sought to maximize the efficiency of the thermal insulation and to minimize the volume of the thermometer. This optimization involves the production of structures in thin layers.
- the signal processing function consists in translating the electrical signal delivered by the thermometer into a video signal which can be used by a camera. This function is performed:
- this first solution which requires treating each component individually, is incompatible with a process where technological manufacturing operations are carried out simultaneously on a large number of components assembled flat on a substrate. This first solution therefore poses the problem of a high manufacturing cost.
- thermometer On the other hand, ensure the transmission of the electrical signal from the thermometer to the processing circuit.
- Figures 2 and 3 schematically represent the layout of the different functions necessary for detection.
- Figure 2 refers to an architecture where the detector is assembled above the processing circuit, while Figure 3 shows a configuration where these two elements are juxtaposed. These two figures are represented:
- thermometer which constitutes the thermometer and corresponds to the active zone of the detector which effectively collects the incident photons
- the zone 13 is not shown because it is located under the detector.
- the devices 11, 12 and 13 do not participate in the detection; to maximize the filling factor, we therefore seek to limit the area necessary for their realization, by:
- European patent application EP-0 354 369 thus describes an uncooled monolithic infrared detector network of bolometers manufactured on a silicon substrate.
- the bolometers include a stack of silicon oxide, TiN (titanium nitride), a-Si: H (hydrogenated amorphous silicon), TiN, silicon oxide.
- TiN titanium nitride
- a-Si: H hydrogenated amorphous silicon
- TiN titanium oxide
- the titanium nitride forms the infrared absorber and the resistance contacts, and the amorphous silicon the resistance with a high temperature coefficient of resistivity.
- the resistor is suspended above the silicon substrate by metallic interconnections and the associated processing circuit is formed in the silicon substrate below the resistor.
- a first solution consists in compensating for the stresses which develop in a thin layer by the provision of an additional layer in contact with this layer.
- a second solution consists in reducing the amplitude of the intrinsic stresses of the materials used by resorting to heat treatments at high temperatures in order to relax the stresses.
- this solution results in thermally constraining the electronic processing circuit placed under the detector and degrading the functionality of said circuit.
- FIG. 4 represents a perspective view of a unitary detector characterized by thermal insulation devices 12 of intermediate length.
- the structures most often- ' produced, illustrated in Figures 5, 6 and 7, represent a plan view of three neighboring detectors 16, 17 and 18 forming part of a generally more complex structure, linear strip or two-dimensional stamping detectors.
- thermal insulation is maximized by means of very long thermal insulation devices 12 associated with mechanical holding devices and electrical interconnection 11.
- This embodiment has the following drawbacks:
- the filling factor is maximized by limiting the area devoted to the thermal insulation devices 12; mechanical deformations are limited and a fine structure can be used.
- this embodiment has reduced thermal insulation and, consequently, limited detection sensitivity.
- thermal leaks can be divided into eight branches instead of two, resulting in a loss of sensitivity by a factor of 4.
- the object of the invention is to propose a device for the thermal detection of electromagnetic radiation comprising thermal micro-bridge detectors using the thinnest and most plane suspended active layers possible.
- the present invention relates to a device for the thermal detection of electromagnetic radiation comprising at least two micro-bridge detectors having mechanical holding devices with a circuit for processing the signal supplied by the detectors, characterized in that the suspended layers of the micro-bridges two neighboring detectors are connected together by additional mechanical connections, separate from the mechanical holding devices.
- each mechanical connection is an extension of at least one of the suspended layers of the micro-bridges.
- each mechanical connection comprises a material with low heat conductivity.
- the (or) mechanical connection (s) is (are) in alignment with two mechanical holding devices, each belonging to one of two neighboring detectors.
- the device of the invention can be connected to one or more neighboring devices by forming a repetitive configuration of said detector according to a linear or matrix architecture suitable for producing images of sources of electromagnetic waves.
- the invention relates more particularly to the field of infrared detectors based on the principle of thermal detection as opposed to quantum detection, and advantageously operating at room temperature.
- the invention also relates to a method of manufacturing such a device starting from a treatment circuit showing on the surface metallic bonding pads, passive by an insulating layer in which openings are provided at the pads. This process includes the following steps:
- a reflector is produced on the surface of the treatment circuit by deposition of a metal layer and definition by photolithography;
- An optical cavity is produced by deposition and annealing of a sacrificial layer which is then removed; - at least two layers constituting the micro-bridge are deposited, namely
- connection pads, the sacrificial layer, the layer of temperature-sensitive material and the conductive layer • by etching the connection pads, the sacrificial layer, the layer of temperature-sensitive material and the conductive layer to the right
- the electrodes of the detector are defined by etching the conductive layer
- the layer of temperature-sensitive material, the conductive layer and the optional layers necessary for making the micro-bridge are simultaneously etched, using a mask to spare an area between the detectors.
- the layer of temperature sensitive material is a layer of amorphous silicon.
- the conductive layer constituting the electrodes of the detector is a layer of titanium nitride.
- the metal layer, which ensures electrical continuity between the electrical pads and the micro-bridge electrodes, is a layer of aluminum.
- the metallic layer, constituting the electrodes of the detector is removed, in the areas occupied by mechanical connections.
- a last layer can be deposited, which can be a layer of silicon oxide, silicon nitride, or amorphous silicon.
- connection devices are thinned by partial etching of the latter.
- the conductive layer and the optional layer can be eliminated at the connections.
- connection element made of a material other than those already present is reported on micro-bridges completely isolated from each other. in the icro-bridge and having a low heat conductivity: for example silicon nitride or a polymeric material.
- the signal processing circuit can thus advantageously be integrated into the detection circuit according to a monolithic structure, which is preferable to a hybrid structure, in terms of performance and costs.
- Figure 1 illustrates the block diagram of a conventional electromagnetic radiation thermal detector.
- FIGS 2 and 3 schematically represent the layout of the different functions necessary for detection.
- FIGS 4, 5, 6 and 7 illustrate several conventional detector structures.
- FIG. 8 illustrates a first embodiment of the detection device according to the invention.
- FIG. 9 illustrates a second embodiment of the detection device according to the invention.
- FIG. 10 shows the template of the filter suitable for processing a signal from a central detector having two connection elements to the neighboring detectors.
- FIGS. 11A and 11B illustrate two sectional views of a structure produced according to a preferred embodiment of the invention in the field of infrared detection.
- FIG. 12 illustrates the drawing of a mask which cuts out a micro-bridge according to the invention.
- the present invention relates to a device for the thermal detection of electromagnetic radiation comprising at least two micro-bridge detectors, in which the “suspended” layers of the micro-bridges are connected together by a mechanical connection. These suspended layers are the micro-bridge layers which are physically isolated from the substrate and held above the substrate by mechanical holding devices.
- This device represented in FIG. 8, comprises the following elements:
- Each mechanical connection 15, 15 ' can be an extension of at least one of the suspended layers micro-bridges. It can be made of a material with low heat conductivity.
- the device of the invention has mechanical stability reinforced by specific holding devices, which ensure mechanical continuity between each detector and its closest neighbors.
- the realization of a repetitive configuration of the detector of the invention according to a linear or matrix architecture leads to an assembly of detectors which will be described as related, whose mechanical strength is improved.
- Rcx L 2 / ( ⁇ 2. 2 .E) with:
- ⁇ , L ⁇ , ⁇ , E ⁇ being respectively the heat conductivity, the length, the width and the thickness of the thermal insulation devices 12 and ⁇ , L 2 , W 2 , E representing the same parameters relating to the mechanical connections 15, 15 '.
- the intermodulation between detectors can therefore be limited and adjusted according to the intended application, thanks to a suitable drawing of the devices 12, 15 and 15 '.
- values of the order of 20%, which make it possible to produce a good quality infrared retina, can be obtained for connections 15, 15 ′ having a double length of the thermal insulation arms 12, as illustrated in FIG. 9 .
- FIG. 10 thus represents the template of a filter suitable for processing a signal from a central detector 16 having two connection elements to neighboring detectors 17 and 18 and characterized by an intermodulation rate of 10%.
- FIGS. 11A and 11B show two sectional views of a structure produced according to a preferred embodiment of the invention, showing two neighboring detectors 16 and 17.
- the first section (FIG. 11A) is produced outside the connection devices 15 and 15 ', while the second ( Figure 11B) crosses them.
- the method of manufacturing such a device starts from a processing circuit 19 already completed, obtained according to known techniques, for example microelectronics on silicon, showing on the surface metal bonding pads 20 which make it possible to make the electrical connections between the detectors and the inputs of the processing circuit.
- These connecting pads 20 are usually passive by an insulating layer 21 in which openings have been arranged at the pads.
- the role of this reflector is to optimize the absorption of the infrared wave by improving the efficiency of the quarter-wave resonant cavity constituted by the reflector 22, the micro-bridge 29 and the space between these two elements.
- the thickness of this layer is generally 2.5 micrometers, which makes it possible to produce a sensitive detector in a wavelength range of the order of 10 micrometers.
- the layers constituting the micro-bridge, which are then deposited on the sacrificial layer 23, are at least two in number:
- a layer 24 of temperature-sensitive material which may be amorphous silicon deposited according to a conventional process
- a conductive layer 25 constituting the electrodes of the detector which may be titanium nitride deposited by reactive sputtering.
- the mechanical holding and electrical interconnection devices are those of a micro-bridge in the infrared domain. The stages of obtaining them are specific to them, independent of the preceding stages described and can be replaced by the stages of obtaining other holding and interconnection devices.
- connection pads 20 An etching, according to photolithography methods, of the layers 23, 24, 25 in line with the connection pads 20; - Then, the deposition of one or more metallic layers 26 which ensure electrical and mechanical continuity between the connection pads and the electrodes of the micro-bridge.
- This metallic layer consists, for example, of aluminum.
- This layer 26 is defined and etched according to conventional methods, so as to limit the size of these interconnection devices to the only surface necessary for good resumption of contact with the electrode 25 of the detector.
- the electrodes of the device of the invention are then defined by etching the metal layer 25 according to a configuration adapted to the electrical characteristics which it is desired to give to the detector.
- This layer 25 is advantageously removed from the zones which will subsequently be occupied by the connection members, so as to avoid electrical short circuits between detectors and to improve the thermal impedance of the connections.
- This layer 28 can be either an electrically active material, possibly of the same nature as the temperature-sensitive material 24, or an electrically neutral material which can be a material with low heat conductivity because it can increase the thermal leaks of the micro-bridge. Therefore, silicon oxide, silicon nitride or amorphous silicon are preferably used.
- a final photolithographic level makes it possible to define the perimeter of the detectors by simultaneous etching of the layers 24, 25, 28, which makes it possible: - to isolate the detectors from each other;
- thermal insulation devices 12 cut in the micro-bridge 29 proper, so as to achieve between the mechanical holding device and electrical interconnection on the one hand and the detector on the other hand, a reduced section, long length and good mechanical strength.
- connections between detectors can also be made during this last step.
- the etching of the layers 24, 25, 28 spares a particular area, of limited extent and located between the detectors, the spared material constituting the connection devices.
- the spared area has a small section, typically 0.5 to 3 micrometers wide for a thickness equal to the thickness of the micro-bridge.
- the geometric ratio of the connection to the total perimeter of the detector is then very limited, which makes it possible to produce detectors having a low thermal intermodulation.
- a first variant of the invention consists in thinning the connection devices by partially etching them.
- One can either completely engrave one of the layers of the connection elements, or substantially thin one of its components by controlling the etching time.
- the metal layer 25 and the optional layer 28 can be eliminated at the connections, without limiting the mechanical strength of the assembly.
- This local etching process calls for the use of a particular mask and the usual photolithography techniques.
- a second variant consists in attaching to micro-bridges completely isolated from each other, a connection element made of a material possibly other than those already present in the micro-bridge and chosen for its favorable thermal characteristics, for example nitride of silicon or polymeric materials that have low heat conductivity.
- Polymers of the PVDF type are particularly favorable since they have a heat conductivity lower by an order of magnitude than the heat conductivity of silicon oxide.
- the usual deposition techniques, in particular PECVD, LPCVD deposition, sputtering, spreading of solution containing a liquid precursor, etc. can be used.
- the invention can also be applied to connection devices of geometric shape other than rectangular.
- a design that maximizes the length is favorable since it limits the intermodulation between detectors.
- FIG. 12 shows the drawing of a mask which cuts the micro-bridge according to the concept of the invention and which maximizes the length of the connections.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00900622A EP1147560A1 (fr) | 1999-01-21 | 2000-01-20 | Reseau de detecteurs thermiques de rayonnements electromagnetiques et procede de fabrication de celui-ci |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9900632A FR2788885B1 (fr) | 1999-01-21 | 1999-01-21 | Dispositif de detection thermique de rayonnements electromagnetiques et procede de fabrication de celui-ci |
FR99/00632 | 1999-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000044050A1 true WO2000044050A1 (fr) | 2000-07-27 |
Family
ID=9541069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/000120 WO2000044050A1 (fr) | 1999-01-21 | 2000-01-20 | Reseau de detecteurs thermiques de rayonnements electromagnetiques et procede de fabrication de celui-ci |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1147560A1 (fr) |
FR (1) | FR2788885B1 (fr) |
WO (1) | WO2000044050A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2411521A (en) * | 2004-02-27 | 2005-08-31 | Qinetiq Ltd | Fabrication method for micro-sensor device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007509315A (ja) * | 2003-10-09 | 2007-04-12 | オカス コーポレーション | 2層構造のボロメータ型赤外線センサ及びその製造方法 |
FR2930639B1 (fr) | 2008-04-29 | 2011-07-01 | Ulis | Detecteur thermique a haute isolation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2200246A (en) * | 1985-09-12 | 1988-07-27 | Plessey Co Plc | Thermal detector array |
EP0354369A2 (fr) * | 1988-08-12 | 1990-02-14 | Texas Instruments Incorporated | Détecteur infrarouge |
JPH08261832A (ja) * | 1995-03-20 | 1996-10-11 | Fujitsu Ltd | 赤外線センサ及びその製造方法 |
EP0828145A1 (fr) * | 1996-08-08 | 1998-03-11 | Commissariat A L'energie Atomique | Détecteur infrarouge et procédé de fabrication de celui-ci |
-
1999
- 1999-01-21 FR FR9900632A patent/FR2788885B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-20 EP EP00900622A patent/EP1147560A1/fr not_active Ceased
- 2000-01-20 WO PCT/FR2000/000120 patent/WO2000044050A1/fr not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2200246A (en) * | 1985-09-12 | 1988-07-27 | Plessey Co Plc | Thermal detector array |
EP0354369A2 (fr) * | 1988-08-12 | 1990-02-14 | Texas Instruments Incorporated | Détecteur infrarouge |
JPH08261832A (ja) * | 1995-03-20 | 1996-10-11 | Fujitsu Ltd | 赤外線センサ及びその製造方法 |
EP0828145A1 (fr) * | 1996-08-08 | 1998-03-11 | Commissariat A L'energie Atomique | Détecteur infrarouge et procédé de fabrication de celui-ci |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 02 28 February 1997 (1997-02-28) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2411521A (en) * | 2004-02-27 | 2005-08-31 | Qinetiq Ltd | Fabrication method for micro-sensor device |
Also Published As
Publication number | Publication date |
---|---|
EP1147560A1 (fr) | 2001-10-24 |
FR2788885A1 (fr) | 2000-07-28 |
FR2788885B1 (fr) | 2003-07-18 |
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