EP2419702A1 - Infrarotlichtsensor mit hoher signalspannung und hohem signal- rausch-verhältnis - Google Patents
Infrarotlichtsensor mit hoher signalspannung und hohem signal- rausch-verhältnisInfo
- Publication number
- EP2419702A1 EP2419702A1 EP10714629A EP10714629A EP2419702A1 EP 2419702 A1 EP2419702 A1 EP 2419702A1 EP 10714629 A EP10714629 A EP 10714629A EP 10714629 A EP10714629 A EP 10714629A EP 2419702 A1 EP2419702 A1 EP 2419702A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- infrared light
- sensor
- electrode
- detector
- light detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 230000008878 coupling Effects 0.000 claims abstract description 28
- 238000010168 coupling process Methods 0.000 claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 8
- 229910052451 lead zirconate titanate Inorganic materials 0.000 claims description 6
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 claims description 5
- 238000001931 thermography Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000007740 vapor deposition Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract 2
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
-
- 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
- G01J5/08—Optical arrangements
-
- 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
- G01J5/08—Optical arrangements
- G01J5/0846—Optical arrangements having multiple detectors for performing different types of detection, e.g. using radiometry and reflectometry channels
Definitions
- the invention relates to an infrared light sensor with high
- Signal voltage and high signal-to-noise ratio as well as an infrared light detector with the infrared light sensor.
- An infrared light detector for detecting hot radiation has, for example, a thin film pyroelectric infrared light sensor with two electrode layers and a pyroelectric layer of pyroelectric sensitive material arranged between the electrode layers.
- This material is ferroelectric lead zirconate titanate (PZT).
- the electrode layers are made of platinum or of a heat radiation absorbing chromium-nickel alloy. The layers are applied by a gas phase deposition method.
- the infrared light sensor is mounted on a support membrane made of silicon.
- a readout electronics m is provided to the infrared light detector.
- the readout electronics are realized by CMOS (complementary metal oxide semiconductors) technology, ASICs or discrete components.
- the readout electronics are operated in "voltage mode", with the readout electronics having a high impedance.
- the signal of the infrared light sensor is basically in
- Voltage Mode is not dependent on the flat extension of the pyroelectric layer.
- the Dielekt ⁇ zitats slaughter the pyroelectric layer of the infrared light sensor is high, whereby the capacity of the infrared light sensor is also high.
- the object of the invention is an infrared light sensor with high signal voltage and high signal-to-noise ratio and to provide an infrared light detector having the infrared light sensor.
- the infrared light detector according to the invention for an infrared light detector has a carrier membrane section and at least two sensor chips which are fastened next to one another on the carrier membrane section and each have a layer element made of pyroelectric sensitive material which is electrically contacted by a base electrode and a head electrode and arranged such that between the head electrode and in each case a differential voltage is applied to the base electrode of each layer element when the layer elements are irradiated with infrared light, and in each case for two adjacently arranged sensor chips a coupling line with which the head electrode of one sensor chip and the base electrode of the other sensor chip are electrically conductively coupled to one another in that the layer elements of the sensor chips are connected in a series circuit, one of the base electrodes at one end and one of the base electrodes at its other end
- the infrared light detector according to the invention has at least one of the infrared light sensors, wherein a carrier membrane of the infrared light detector is formed by the carrier membrane portion, and a readout electronics for each infrared light sensor whose total differential voltage value can be tapped with the readout electronics.
- the infrared light sensor is formed by the series connection of the sensor chips, so that the total capacity of the infrared light sensor is the reciprocal sum of the reciprocal individual capacitances of the sensor chips.
- the total capacity of the infrared light sensor is smaller than the capacitances of the individual sensor chips and yet sufficiently high to be advantageous with the readout electronics co.
- the total differential voltage of the infrared light sensor is higher than the individual differential voltages of the sensor chips, namely the sum of the individual differential voltages of the layer elements, so that with the readout electronics, the high total differential voltage at the reduced total capacity of the infrared light sensor is advantageously low noise readable.
- the strength of the differential voltage in "voltage mode" operation of each of the sensor chips is basically independent of the areal extent of the layer element of the respective sensor chip.
- the sensor chips can advantageously be made small in their areal extent, for example such that the sum of the surfaces of the layer elements of the sensor chips is the surface of a sensor chip
- Infrared light sensor advantageously designed targeted.
- the pyroelectrically sensitive material is preferably lead zirconate titanate.
- the layer element is preferably a thin film. The thin film is preferred with a
- Gasphasenabscheideclar in particular from the group PVD (physical vapor deposition) and / or CVD (chemical vapor deposition) produced.
- PVD physical vapor deposition
- CVD chemical vapor deposition
- a PVD method for example, a sputtering or sputtering in question.
- pyroelectric active lead zirconate titanate with perovskite structure is formed in the layer elements.
- the sensor chips are preferably connected to one another in a thermally conductive manner via the carrier membrane section and the coupling lines. As a result, thermal crosstalk is high between the sensor chips, as a result of which the sensor chips react uniformly under infrared light irradiation, so that the differential voltages of the sensor chips are as substantially as possible substantially equal.
- the total capacitance value of the series connection corresponds at least three times to the input capacitance value of the readout electronics.
- the infrared light sensors are preferably in a grid arrangement on the support membrane of the
- the infrared light sensors are preferably arranged thermally insulated from one another.
- thermal crosstalk from one of the infrared light sensors to another of the infrared light sensors is small, whereby the infrared light detector has high measurement accuracy.
- the infrared light detector is used according to the invention as a thermal imaging camera, a presence detector, a motion detector, a gas detector, a spectroscope and / or a Terrahertzdetektor.
- the infrared light detector is equipped with the plurality of infrared light sensors such that the infrared light detector has 240 ⁇ 320 infrared light sensors in a grid arrangement.
- Fig. 1 shows a cross section of the embodiment of the infrared light detector and Fig. 2 detail A from FIG. 1 .
- an infrared light detector 1 has a support membrane 2 which is spanned by a support frame 3. On the support membrane 2, a first infrared light sensor 4, a second infrared light sensor 5, and a third infrared light sensor 6 are mounted.
- the infrared light sensors 4 to 6 are adapted to detect infrared light, wherein the infrared light sensors 4 to 6 depending on the infrared light and the configuration of the
- the read-out electronics has an amplifier for amplifying the signal of the respective infrared light sensor and is integrated in the infrared light detector.
- the second infrared light sensor 5 has a first sensor chip 7, a second sensor chip 8, a third sensor chip 9 and a fourth sensor chip 10.
- Each of the sensor chips 7 to 10 is formed by a pyroelectric layer element 11, which is formed of pyroelectric sensitive material, such as lead zirconate titanate.
- each sensor chip 7 to 10 has a base electrode 12, which is fastened on the carrier membrane 2.
- the layer element 11 is arranged on the base electrode 12, so that the layer element 11 contacts the base electrode 11. On the layer member 11 this contacting a head electrode 13 is attached.
- the sensor chips 7 to 10 are arranged side by side on the carrier membrane 2 on an imaginary straight line.
- the base electrode 12 of each sensor chip 7 to 10 is on one side, in Fig. 1 and 2 left, formed by the layer member 11 above, so that the base electrode 12 from outside the sensor chip 7 to 10 can be contacted.
- a first coupling line 14 Between the first sensor chip 7 and the second sensor chip 8 is a first coupling line 14, between the second sensor chip 8 and the third sensor chip 9 is a second coupling line 15 and between the third sensor chip 9 and the fourth sensor chip 10, a third coupling line 16 is provided.
- the coupling lines 14 to 16 are designed to be comparable to one another, wherein the first coupling line 14 is described below as representative of the coupling lines 15, 16.
- the first coupling line 14 contacts the top electrode 13 of the first sensor chip 7, the coupling line 14 being fixed on the top electrode 13.
- the coupling line 14 is guided past the layer element 11 and the base electrode 12 to the support membrane 2, the coupling line 14 contacting neither the layer element 11 nor the base electrode 12.
- the coupling line 14 is guided to the base electrode of the second sensor chip 8, so that the base electrode of the second sensor chip 8 is contacted by the coupling line 14.
- an electrically conductive connection between the head electrode 13 of the first sensor chip 7 and the base electrode of the second sensor chip 8 is produced by the coupling line 14.
- the head electrode 13 of the first sensor chip 7 is electrically conductively connected to the base electrode of the second sensor chip 8 by the first coupling line 14.
- the head electrode of the second sensor chip 8 is electrically conductively connected to the base electrode of the third sensor chip 9 by the second coupling line 15
- the head electrode of the third sensor chip 9 is electrically conductively connected to the base electrode of the fourth sensor chip 10 by the third coupling line 16.
- Coupling lines 14 to 16 connected in series The one end of the series connection is formed by the base electrode 12 of the first sensor chip 7, and the other end of the series circuit is formed by the head electrode of the fourth sensor chip 10.
- the sensor chips 7 to 9 of the second infrared light sensor 5 are irradiated with infrared light during operation of the infrared light detector 1, a difference voltage is applied to the layer elements 11 between the head electrode 13 and the base electrode 12 of each of the sensor chips 7 to 10 due to a pyroelectric effect.
- Characterized in that of the coupling lines 14 to 16, the sensor chips 7 to 10 are connected in series with their base electrodes 12 and head electrodes 13, between the first connection point 17 and the second connection point 18 is a total differential voltage as the sum of the individual differential voltages of the sensor chips 7 to 10 at.
- the total differential voltage is tapped at the first connection point 17 and the second connection point 18 of the evaluation and further processed. Further, the total capacity of the infrared light sensors 4 to 6 is lower than that due to the series connection of the sensor chips 7 to 10 with the coupling lines 14 to 16
- each read-out electronics associated with the respective infrared light sensors 4 to 6 has a high total voltage difference with a small total capacity of the infrared light sensors 4 to 6, thereby increasing the signal-to-noise ratio of the infrared light sensor 4 to 6 ,
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910017845 DE102009017845B4 (de) | 2009-04-17 | 2009-04-17 | Infrarotlichtsensor mit hoher Signalspannung und hohem Signal-Rausch-Verhältnis, sowie Infrarotlichtdetektor mit dem Infrarotlichtsensor |
PCT/EP2010/055062 WO2010119131A1 (de) | 2009-04-17 | 2010-04-16 | Infrarotlichtsensor mit hoher signalspannung und hohem signal- rausch-verhältnis |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2419702A1 true EP2419702A1 (de) | 2012-02-22 |
Family
ID=42235441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10714629A Ceased EP2419702A1 (de) | 2009-04-17 | 2010-04-16 | Infrarotlichtsensor mit hoher signalspannung und hohem signal- rausch-verhältnis |
Country Status (6)
Country | Link |
---|---|
US (1) | US8963087B2 (de) |
EP (1) | EP2419702A1 (de) |
KR (1) | KR101692837B1 (de) |
CN (1) | CN102449453B (de) |
DE (1) | DE102009017845B4 (de) |
WO (1) | WO2010119131A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2888631C (en) * | 2012-10-19 | 2021-01-26 | Picometrix, Llc | System for calculation of material properties using reflection terahertz radiation and an external reference structure |
US9939323B2 (en) * | 2012-12-28 | 2018-04-10 | Illinois Tool Works Inc. | IR sensor with increased surface area |
DE102013204763A1 (de) | 2013-03-19 | 2014-09-25 | Robert Bosch Gmbh | Mikromechanische Sensorvorrichtung und entsprechendes Herstellungsverfahren |
DE102014106680B4 (de) * | 2013-05-24 | 2023-11-16 | Avago Technologies International Sales Pte. Ltd. | Schalterbetätigungseinrichtung, mobiles Gerät und Verfahren zum Betätigen eines Schalters durch eine nicht-taktile "Push"-Geste |
CN106328754B (zh) * | 2015-07-03 | 2018-08-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | 一种组合式太赫兹波探测器 |
JP2019007749A (ja) * | 2017-06-20 | 2019-01-17 | ヤマハ株式会社 | 圧力センサー |
US11148675B2 (en) * | 2018-08-06 | 2021-10-19 | Qualcomm Incorporated | Apparatus and method of sharing a sensor in a multiple system on chip environment |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3842276A (en) * | 1973-06-15 | 1974-10-15 | Rca Corp | Thermal radiation detector |
US3877308A (en) * | 1974-01-02 | 1975-04-15 | Minnesota Mining & Mfg | Pyroelectric temperature compensated sensing apparatus |
US4441023A (en) * | 1981-07-29 | 1984-04-03 | Eltec Instruments, Inc. | High output differential pyroelectric sensor |
JPS6018730A (ja) * | 1983-07-11 | 1985-01-30 | Murata Mfg Co Ltd | 焦電型検出器 |
US5600143A (en) * | 1994-12-02 | 1997-02-04 | Litton Systems, Inc. | Sensor including an array of sensor elements and circuitry for individually adapting the sensor elements |
JPWO2006043384A1 (ja) | 2004-10-18 | 2008-05-22 | 松下電器産業株式会社 | 赤外線センサ及び赤外線センサアレイ |
JPWO2006132155A1 (ja) | 2005-06-06 | 2009-01-08 | 松下電器産業株式会社 | 電子デバイス及びその製造方法 |
DE102006057974B4 (de) * | 2006-12-04 | 2010-03-04 | Technische Universität Dresden | Richtungsempfindlicher pyroelektrischer Infrarotsensor mit sichelförmiger Elektrodenstruktur |
DE102007024902B8 (de) * | 2007-05-29 | 2010-12-30 | Pyreos Ltd. | Vorrichtung mit Membranstruktur zur Detektion von Wärmestrahlung, Verfahren zum Herstellen und Verwendung der Vorrichtung |
US7732770B2 (en) | 2007-06-19 | 2010-06-08 | The Board Of Trustees Of The University Of Alabama | Thin film multi-layered pyroelectric capacitor |
-
2009
- 2009-04-17 DE DE200910017845 patent/DE102009017845B4/de active Active
-
2010
- 2010-04-16 CN CN201080024199.1A patent/CN102449453B/zh active Active
- 2010-04-16 EP EP10714629A patent/EP2419702A1/de not_active Ceased
- 2010-04-16 WO PCT/EP2010/055062 patent/WO2010119131A1/de active Application Filing
- 2010-04-16 KR KR1020117027420A patent/KR101692837B1/ko active IP Right Grant
- 2010-04-16 US US13/264,908 patent/US8963087B2/en active Active
Non-Patent Citations (3)
Title |
---|
ANGELO RIVETTI: "Front-End Electronics for Radiation Sensors", 1 January 2015 (2015-01-01), pages 430 - 432, XP055306013 * |
O'CONNOR P ET AL: "Prospects for charge sensitive amplifiers in scaled CMOS", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A: ACCELERATORS, SPECTROMETERS, DETECTORS, AND ASSOCIATED EQUIPMENT, ELSEVIER BV * NORTH-HOLLAND, NL, vol. 480, no. 2-3, 21 March 2002 (2002-03-21), pages 713 - 725, XP004345484, ISSN: 0168-9002, DOI: 10.1016/S0168-9002(01)01212-8 * |
See also references of WO2010119131A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101692837B1 (ko) | 2017-01-05 |
US20120132807A1 (en) | 2012-05-31 |
CN102449453B (zh) | 2014-01-01 |
DE102009017845A1 (de) | 2010-10-21 |
US8963087B2 (en) | 2015-02-24 |
KR20120022975A (ko) | 2012-03-12 |
WO2010119131A1 (de) | 2010-10-21 |
CN102449453A (zh) | 2012-05-09 |
DE102009017845B4 (de) | 2011-07-21 |
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