DE102007021911A1 - Sensor element for measuring infrared radiation in predetermined wavelength range, has filter element fastened on upper side of cap substrate by adhesive layer, where upper side of cap substrate is free from anti-reflection coating - Google Patents
Sensor element for measuring infrared radiation in predetermined wavelength range, has filter element fastened on upper side of cap substrate by adhesive layer, where upper side of cap substrate is free from anti-reflection coating Download PDFInfo
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- DE102007021911A1 DE102007021911A1 DE200710021911 DE102007021911A DE102007021911A1 DE 102007021911 A1 DE102007021911 A1 DE 102007021911A1 DE 200710021911 DE200710021911 DE 200710021911 DE 102007021911 A DE102007021911 A DE 102007021911A DE 102007021911 A1 DE102007021911 A1 DE 102007021911A1
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- cap substrate
- substrate
- layer
- adhesive layer
- filter element
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 69
- 239000012790 adhesive layer Substances 0.000 title claims abstract description 34
- 230000005855 radiation Effects 0.000 title claims abstract description 28
- 239000011248 coating agent Substances 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title claims abstract description 25
- 239000010410 layer Substances 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 230000000873 masking effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 3
- 238000001020 plasma etching Methods 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 150000004767 nitrides Chemical class 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 229910052681 coesite Inorganic materials 0.000 description 8
- 229910052906 cristobalite Inorganic materials 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 8
- 229910052682 stishovite Inorganic materials 0.000 description 8
- 229910052905 tridymite Inorganic materials 0.000 description 8
- 239000006117 anti-reflective coating Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002210 silicon-based material Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
Classifications
-
- 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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02162—Coatings for devices characterised by at least one potential jump barrier or surface barrier for filtering or shielding light, e.g. multicolour filters for photodetectors
- H01L31/02164—Coatings for devices characterised by at least one potential jump barrier or surface barrier for filtering or shielding light, e.g. multicolour filters for photodetectors for shielding light, e.g. light blocking layers, cold shields for infrared detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- 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
- H01L31/02—Details
- H01L31/0203—Containers; Encapsulations, e.g. encapsulation of photodiodes
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
Die Erfindung betrifft ein Sensorelement zur Messung infraroter Strahlung, das insbesondere für spektroskopische Messungen einer oder mehrerer Gaskonzentrationen einsetzbar ist, und ein Verfahren zu dessen Herstellung.The The invention relates to a sensor element for measuring infrared radiation, in particular for spectroscopic measurements of or multiple gas concentrations can be used, and a method to its production.
Stand der TechnikState of the art
Die
Auf der Oberseite und Unterseite des Filterelementes sowie auf der Oberseite und Unterseite des Kappensubstrates ist jeweils eine Antireflexionsschicht ausgebildet, um die Transmission für die von oben einfallende Infrarot-Strahlung zu erhöhen. Das Filterelement ist durch eine Kleberschicht auf der Oberseite des Kappensubstrates befestigt; diese Kleberschicht ist somit zwischen der Antireflexionsschicht auf der Oberseite des Kappensubstrates und derjenigen an der Unterseite des Filterelementes angeordnet.On the top and bottom of the filter element and on the top and underside of the cap substrate is an antireflection layer, respectively designed to withstand the transmission for the incident from above To increase infrared radiation. The filter element is through an adhesive layer attached to the top of the cap substrate; this adhesive layer is thus between the antireflection layer on top of the cap substrate and those on the bottom arranged the filter element.
Der Einsatz einer Antireflexionsschicht ermöglicht grundsätzlich eine Erhöhung der Transmission und Verringerung der Reflexion der einfallenden IR-Strahlung. Es zeigt sich bei einem derartigen System jedoch, dass sich insgesamt nicht die gewünschte Antireflexwirkung ergibt.Of the Use of an antireflection coating basically allows an increase in transmission and reduction in reflection the incident IR radiation. It shows up in such a System, however, that in total not the desired Antireflection effect results.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß wird erkannt, dass die Ausbildung einer Antireflexionsschicht auf dem Kappensubstrat unterhalb des Klebers eher nachteilhaft ist, da aufgrund der prozessbedingten Schichtdickentoleranzen der Antireflexionsschicht und der auf dieser angebrachten Kleberschicht auch destruktive Wirkungen auf die Transmissionseigenschaften zu Stande kommen können. Es ergeben sich bereits bei relativ geringen Toleranzen deutliche Änderungen des Transmissionsverhaltens, die sogar zu einer Verschlechterung des Transmissionsverhaltens gegenüber einem System ohne jegliche Antireflexions-Wirkung führen können. Dies wird durch die Ausbildung einer weiteren Antireflexionsschicht auf der Unterseite des Filterelementes noch verstärkt, da hierdurch ein vielschichtiges optisches System erzeugt wird, dessen Interferenzwirkung sehr komplex ist und bei geringfügigen Änderungen deutlich geänderte optische Eigenschaften zeigt. Da bereits das Filterelement mit seinem mehrschichtigen Aufbau, z. B. als Fabry-Perot-Filter bereits ein komplexes Transmissionsverhalten aufgrund der Vielzahl verschiedener Schichten aufweist, kann durch die Antireflexionsschicht auf der Unterseite dieses Filterelementes, die nachfolgende Kleberschicht mit prozessbedingten Toleranzen, und die auf dem Kappensubstrat ausgebildete Antireflexionsschicht letztlich ein sehr komplexes Interferenzverhalten gebildet werden.According to the invention realized that the formation of an antireflection coating on the Cap substrate below the adhesive is rather disadvantageous because due the process-related layer thickness tolerances of the antireflection layer and the adhesive layer applied thereto also destructive effects on the transmission properties can be made. There are already significant changes in the case of relatively small tolerances Transmission behavior, which even leads to a deterioration of the Transmission behavior compared to a system without any Antireflection effect can result. this will by the formation of a further antireflection coating on the Underside of the filter element reinforced, as a result multilayer optical system is generated, its interference effect is very complex and minor changes shows clearly changed optical properties. There already the filter element with its multilayer structure, for. B. as a Fabry-Perot filter already a complex transmission behavior due to the multitude different layers, can by the anti-reflection layer on the underside of this filter element, the subsequent adhesive layer with process-related tolerances, and those on the cap substrate trained antireflection coating ultimately a very complex Interference behavior are formed.
Erfindungsgemäß wird erkannt, dass die Transmissionseigenschaft dieses Systems auf überraschend einfache Weise verbessert werden kann, indem sowohl die Oberseite des Kappensubstrates als auch die Unterseite des Filterelementes frei von einer Antireflexionsschicht sind, wobei die Kleberschicht selbst als Antireflexionsschicht ausgebildet wird.According to the invention realized that the transmission characteristic of this system is surprising Simple way can be improved by both the top the cap substrate as well as the underside of the filter element are free of an anti-reflection layer, wherein the adhesive layer itself is formed as an antireflection layer.
Die Antireflexionsschicht wirkt hierbei in an sich bekannter Weise durch destruktive Interferenz des an seiner oberen und unteren Grenzfläche reflektierten Strahlungsanteils, so dass die an den Grenzschichten erzeugten Strahlungsanteile der reflektierten IR-Strahlung sich ganz oder zumindest weitge hend aufheben und somit nach dem optischen Prinzip der Entspiegelung eine weitgehende Transmission erreicht wird.The Antireflection layer acts in this way in a conventional manner destructive interference of at its upper and lower interface reflected radiation fraction, so that at the boundary layers generated radiation components of the reflected IR radiation itself completely or at least largely cancel and thus after the optical Principle of anti-reflection achieved a substantial transmission becomes.
Somit wird die Schichtdicke der Kleberschicht in Abhängigkeit der Brechungsindizes des Kappensubstrat-Materials, d. h. insbesondere Silizium, der Kleberschicht selbst sowie des Filterelementes gewählt. Erfindungsgemäß wird hierbei erkannt, dass eine gute Modellierung erreicht werden kann, indem ein mittlerer Brechungsindex des Filterelementes gewählt wird, insbesondere bei einem vielschichtigen Filterelement, wie es z. B. ein Fabry-Perot-Filter darstellt.Consequently the layer thickness of the adhesive layer is dependent the refractive indices of the cap substrate material, d. H. especially Silicon, the adhesive layer itself and the filter element selected. According to the invention, it is recognized here that a Good modeling can be achieved by having a mean refractive index the filter element is selected, in particular in a multilayer filter element, as z. B. a Fabry-Perot filter represents.
Auf besonders vorteilhafterweise ist zwar nicht auf der Oberseite, aber auf der Unterseite des Kappensubstrates eine Antireflexbeschichtung ausgebildet, die z. B. durch lokale thermische Oxidierung oder durch Nitridisierung des Siliziumsubstrates ausgebildet werden kann. Erfindungsgemäß hat sich gezeigt, dass eine derartige Anordnung mit genau einer Antireflexionsschicht durch Ausbildung der Kleberschicht auf der Oberseite des Kappensubstrates und der zusätzlichen, auf der Substratunterseite vorgesehenen Antireflexionsschicht eine sehr gute Antireflexionswirkung in einem gewünschten Wellenlängenbereich ermöglicht.On most advantageously, though not on the top, but on the underside of the cap substrate an antireflection coating trained, the z. B. by local thermal oxidation or by Nitridization of the silicon substrate can be formed. Has according to the invention It has been shown that such an arrangement with exactly one antireflection layer by forming the adhesive layer on top of the cap substrate and the additional, provided on the substrate base Antireflection coating a very good antireflection effect in one desired wavelength range allows.
Prozesstechnisch lässt sich die erfindungsgemäße Einstellung der gewünschten Schichtdicke der Kleberschicht insbesondere durch Ausbilden eines Abstandsmittels zwischen Kappensubstrat und Filterelement, z. B. durch Abstandsnoppen bzw. andere Bereiche auf der Oberseite des Kappensubstrates erreichen, so dass die Klebeschicht aufgetragen und der Filterchip unter Verdrängung des Klebers aufgesetzt wird, bis er auf die Abstandsnoppen gelangt.In terms of process technology, the adjustment according to the invention of the desired layer thickness of the adhesive layer can be achieved, in particular, by forming a spacer means between the cap substrate and the filter element, e.g. B. by spacer knobs or other areas on the top of the cap substrate, so that the adhesive layer applied and the filter chip is placed under displacement of the adhesive until it reaches the spacer knobs.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Beschreibung der AusführungsformenDescription of the embodiments
Ein
mikrostrukturiertes Sensorelement
Das
Sensorelement
Auf
dem Sensorsubstrat
Auf
dem Kappenchip
Von
oben einfallende IR-Strahlung IR tritt somit durch das Filterelement
Erfindungsgemäß ist
an der Unterseite
Erfindungsgemäß ist
die Dicke d13 der Kleberschicht
Das
Sensorelement
Die
Antireflexionsschicht
Eine
besonders vorteilhafte Ausführungsform der Antireflexionsschicht
Der
Verlauf des Reflexionsgrades R und des Transmissionsgrades T durch
das Schichtsystem aus dem Kappenchip
Der
Kappenchip
Die
Abstandsmittel
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10339319 A1 [0002] - DE 10339319 A1 [0002]
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710021911 DE102007021911A1 (en) | 2007-05-10 | 2007-05-10 | Sensor element for measuring infrared radiation in predetermined wavelength range, has filter element fastened on upper side of cap substrate by adhesive layer, where upper side of cap substrate is free from anti-reflection coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710021911 DE102007021911A1 (en) | 2007-05-10 | 2007-05-10 | Sensor element for measuring infrared radiation in predetermined wavelength range, has filter element fastened on upper side of cap substrate by adhesive layer, where upper side of cap substrate is free from anti-reflection coating |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007021911A1 true DE102007021911A1 (en) | 2008-11-20 |
Family
ID=39868632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200710021911 Ceased DE102007021911A1 (en) | 2007-05-10 | 2007-05-10 | Sensor element for measuring infrared radiation in predetermined wavelength range, has filter element fastened on upper side of cap substrate by adhesive layer, where upper side of cap substrate is free from anti-reflection coating |
Country Status (1)
Country | Link |
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DE (1) | DE102007021911A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009045302A1 (en) | 2009-10-02 | 2011-04-07 | Robert Bosch Gmbh | Microstructured sensor e.g. infra red thermometer for detection of infra red radiation, has thermopile measuring structure for measuring temperature difference between measuring membrane and reference membrane |
GB2523841A (en) * | 2014-03-07 | 2015-09-09 | Melexis Technologies Nv | Infrared sensor module |
GB2532733A (en) * | 2014-11-25 | 2016-06-01 | Melexis Technologies Nv | Radiation detector comprising a compensating sensor |
DE102019206407A1 (en) * | 2019-05-03 | 2020-11-05 | Siemens Aktiengesellschaft | Measurement method and measurement arrangement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10339319A1 (en) | 2003-08-27 | 2005-03-24 | Robert Bosch Gmbh | Sensor element for determining the carbon dioxide concentration inside a vehicle comprises a hollow chamber with an edge having a window element, and an intensity detection element for radiation passing through the window element |
-
2007
- 2007-05-10 DE DE200710021911 patent/DE102007021911A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10339319A1 (en) | 2003-08-27 | 2005-03-24 | Robert Bosch Gmbh | Sensor element for determining the carbon dioxide concentration inside a vehicle comprises a hollow chamber with an edge having a window element, and an intensity detection element for radiation passing through the window element |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009045302A1 (en) | 2009-10-02 | 2011-04-07 | Robert Bosch Gmbh | Microstructured sensor e.g. infra red thermometer for detection of infra red radiation, has thermopile measuring structure for measuring temperature difference between measuring membrane and reference membrane |
US8465202B2 (en) | 2009-10-02 | 2013-06-18 | Robert Bosch Gmbh | Microstructured sensor for the detection of IR radiation |
GB2523841A (en) * | 2014-03-07 | 2015-09-09 | Melexis Technologies Nv | Infrared sensor module |
GB2532733A (en) * | 2014-11-25 | 2016-06-01 | Melexis Technologies Nv | Radiation detector comprising a compensating sensor |
US10096724B2 (en) | 2014-11-25 | 2018-10-09 | Melexis Technologies Nv | Radiation detector comprising a compensating sensor |
DE102019206407A1 (en) * | 2019-05-03 | 2020-11-05 | Siemens Aktiengesellschaft | Measurement method and measurement arrangement |
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