EP1711803A1 - Sensor und verfahren zu dessen herstellung - Google Patents
Sensor und verfahren zu dessen herstellungInfo
- Publication number
- EP1711803A1 EP1711803A1 EP05707905A EP05707905A EP1711803A1 EP 1711803 A1 EP1711803 A1 EP 1711803A1 EP 05707905 A EP05707905 A EP 05707905A EP 05707905 A EP05707905 A EP 05707905A EP 1711803 A1 EP1711803 A1 EP 1711803A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicon
- sensor
- containing components
- silanization
- fet
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance
- G01L9/0073—Transmitting or indicating the displacement of flexible diaphragms using variations in capacitance using a semiconductive diaphragm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/414—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS
- G01N27/4141—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS specially adapted for gases
- G01N27/4143—Air gap between gate and channel, i.e. suspended gate [SG] FETs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/0802—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/005—H2
Definitions
- the invention relates to a sensor, for example gas sensor, acceleration sensor or pressure sensor with silicon-containing components, by means of which electrical signals can be read out in the presence of analyte or in the event of mechanical deformation, and a manufacturing method.
- the moisture contained in the air forms a thin film of water on the surface of silicon-containing material, which leads to increased surface conductivity.
- the leakage currents caused by this increase represent a problem with regard to stability and signal behavior for many sensors that are in contact with air.
- the invention has for its object to provide a sensor with a semiconductor body, the sensitivity to moisture or whose leakage currents is / are significantly reduced. A manufacturing process must also be specified.
- the invention is based on the knowledge that the method of silanization known from glass coating also can be transferred to semiconductor technology. This creates a monolayer of the common, hydrophobic molecular chains on the silicon-containing surface, which prevent the adsorption of water molecules. All hydrophobic molecular chains that form a stable connection with the surface are suitable for this. Thus, up to high air humidity, almost 100%, no closed water film can arise, which favors the undesirable surface conductivity.
- silicon-containing components can be operated unheated and unencapsulated in ambient air without any disturbing influences from surface currents induced by moisture.
- the semiconductor body used as the basis in this silicon technology is silanized. Both pure silicon and superficial silicon compounds can be treated.
- silicon-based semiconductor sensors which are insensitive to moisture are, for example, gas sensors, pressure sensors or generally all sensors which come into contact with essentially atmospheric moisture during operation. Therefore, analytes such as target gases are detected in gas sensors and mechanical shape changes in pressure or acceleration sensors.
- FIG. 1 shows a comparison between a silanized hydrogen sensor and one without a hydrophobic cover layer
- FIG. 2 shows a representation with different moisture values and additional gases
- Figure 3 shows the prior art in the form of a floating gate FET.
- FGFET floating gate field effect transistor
- Other types of FETs can also be used, such as suspended gate FETs.
- 3 shows the schematic structure of the FGFET used.
- the potential change at the sensitive layer, caused by the application of gas, is conducted to the MOSFET via the voltage control spanned by the floating gate and capacitive well (electrode) and leads there to a
- the strong drift and "deformation" of the hydrogen signals is effectively prevented by the silanization.
- the remaining small moisture levels in the silanized signal are caused by the dipole signal of the water on the sensitive platinum layer and are no longer a problem.
- the above FGFET with surfaces without a hybrid gate was both silanized and unsilanized.
- the sensitivity of the floating gate was used.
- the guard ring was controlled with a rectangular generator and the moisture-dependent coupling to the transistors was measured.
- the frequency was chosen to be very low (0.1 Hz) in order to exclude frequency-dependent effects in the RC elements.
- the representation corresponding to FIG. 2 contains a comparison of these measurements with different humidities and additional gases.
- the current in the transistors is kept constant via feedback electronics. The resulting signals originate from the feedback control loop and thus reflect the potential present at the floating gate.
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004005927 | 2004-02-06 | ||
| DE102004035551A DE102004035551A1 (de) | 2004-02-06 | 2004-07-22 | Sensor und Verfahren zu dessen Herstellung |
| PCT/EP2005/050418 WO2005075969A1 (de) | 2004-02-06 | 2005-02-01 | Sensor und verfahren zu dessen herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1711803A1 true EP1711803A1 (de) | 2006-10-18 |
Family
ID=34839585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05707905A Withdrawn EP1711803A1 (de) | 2004-02-06 | 2005-02-01 | Sensor und verfahren zu dessen herstellung |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7719004B2 (de) |
| EP (1) | EP1711803A1 (de) |
| WO (1) | WO2005075969A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005046944A1 (de) * | 2005-09-30 | 2007-04-05 | Micronas Gmbh | Gassensitiver Feldeffekttransistor zur Detektion von Chlor |
| EP2006668B1 (de) | 2007-06-22 | 2014-05-07 | Micronas GmbH | Gassensor |
| US8878257B2 (en) * | 2010-06-04 | 2014-11-04 | Freescale Semiconductor, Inc. | Methods and apparatus for an ISFET |
| GB2484339B (en) | 2010-10-08 | 2016-12-21 | Dnae Group Holdings Ltd | Electrostatic discharge protection |
| JPWO2015155983A1 (ja) * | 2014-04-08 | 2017-04-13 | パナソニックIpマネジメント株式会社 | センサ |
| DE102014226816A1 (de) | 2014-12-22 | 2016-06-23 | Robert Bosch Gmbh | Halbleiterbasierte Gassensoranordnung zum Detektieren eines Gases und entsprechendes Herstellungsverfahren |
| DE102017215310A1 (de) * | 2017-09-01 | 2019-03-07 | Robert Bosch Gmbh | Gassensorvorrichtung und Verfahren zum Herstellen einer Gassensorvorrichtung |
| JP7552177B2 (ja) * | 2020-09-15 | 2024-09-18 | セイコーエプソン株式会社 | 物理量センサー及び慣性計測ユニット |
| CN113447534B (zh) * | 2021-07-06 | 2023-01-06 | 重庆大学 | 一种氨气传感器及其制备方法 |
| TWI808541B (zh) * | 2021-11-22 | 2023-07-11 | 財團法人工業技術研究院 | 晶片封裝結構的透氣封裝蓋及其製造方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4020830A (en) * | 1975-03-12 | 1977-05-03 | The University Of Utah | Selective chemical sensitive FET transducers |
| JPS5825221B2 (ja) | 1977-12-12 | 1983-05-26 | 株式会社クラレ | Fet比較電極 |
| JPS56100350A (en) | 1980-01-11 | 1981-08-12 | Kuraray Co Ltd | Fet comparison electrode |
| NL8400916A (nl) | 1984-03-22 | 1985-10-16 | Stichting Ct Voor Micro Elektr | Werkwijze voor het vervaardigen van een isfet en een aldus vervaardigde isfet. |
| JPS63171355A (ja) * | 1987-01-09 | 1988-07-15 | Seitai Kinou Riyou Kagakuhin Shinseizou Gijutsu Kenkyu Kumiai | 半導体化学センサ |
| US5182005A (en) | 1990-06-01 | 1993-01-26 | Basf Aktiengesellschaft | Reference electrode for chemical sensors |
| DE4017905A1 (de) * | 1990-06-02 | 1991-12-05 | Basf Ag | Referenzelektrode fuer chemische sensoren |
| JP3384900B2 (ja) * | 1995-01-09 | 2003-03-10 | 長野計器株式会社 | 圧力センサ |
| DE19621997C1 (de) * | 1996-05-31 | 1997-07-31 | Siemens Ag | Elektrochemischer Sensor |
| DE19814855C1 (de) | 1998-04-02 | 1999-11-04 | Siemens Ag | Gassensor nach dem Prinzip der Messung der Austrittsarbeit bzw. des Kontaktpotentiales |
| DE10163567A1 (de) * | 2001-12-21 | 2003-07-17 | Endress & Hauser Gmbh & Co Kg | Drucksensor mit hydrophober Beschichtung |
| DE10246283B3 (de) * | 2002-10-02 | 2004-03-25 | Infineon Technologies Ag | Verfahren zur Herstellung von Kanälen und Kavitäten in Halbleitergehäusen und elektronisches Bauteil mit derartigen Kanälen und Kavitäten |
| DE10335163B3 (de) * | 2003-07-30 | 2005-03-03 | Micronas Gmbh | Gassensor |
-
2005
- 2005-02-01 EP EP05707905A patent/EP1711803A1/de not_active Withdrawn
- 2005-02-01 US US10/588,559 patent/US7719004B2/en not_active Expired - Fee Related
- 2005-02-01 WO PCT/EP2005/050418 patent/WO2005075969A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005075969A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005075969A1 (de) | 2005-08-18 |
| US7719004B2 (en) | 2010-05-18 |
| US20070262358A1 (en) | 2007-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20060828 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI NL |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BURGMAIR, MARKUS Inventor name: EISELE, IGNAZ Inventor name: KNITTEL, THORSTEN |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB IT LI NL |
|
| 17Q | First examination report despatched |
Effective date: 20080925 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20110901 |