| Patent application number | Description | Published |
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| 20080237654 | Device for Detecting a Gas or Gas Mixture - A device for detecting a gas or gas mixture having at least one first gas sensor designed as an SGFET and at least—one second, additional gas sensor designed as a Lundström-FET. The gas sensors are connected to a processing device designed to analyze the measurement signals from both types of gas sensors in order to detect the gas or gas mixture. | 10-02-2008 |
| 20090078026 | Gas Sensor - A gas sensor has at least one gas sensitive layer, which has at least one surface area in which the work function is dependent upon the concentration of a target gas capable of being brought into contact with the surface zone. At least one electric potential sensor is capacitatively coupled to the surface zone over an air gap. The surface zone of the gas sensitive layer is covered with an electrically insulating coating which is inert to the target gas and which is adhesively bound to the gas sensitive layer. The coating is configured so that it is permeable to the target gas and so that when the target gas contacts the surface zone of the gas sensitive layer, it prevents or at least impedes an alteration of the bound state of atoms and/or molecules bound to the surface zone and differing from the target gas. | 03-26-2009 |
| 20090246084 | Gas Sensor - A gas sensor has a gas-sensitive layer with a surface area where the electron affinity depends on the concentration of a target gas brought in contact with the surface area. An electrical potential sensor is capacitively coupled to the surface area via an air gap. The surface area of the gas-sensitive layer is covered by an electric insulating layer that is inert to the target gas and is bonded to the gas-sensitive layer. The coating is designed in such a way that it is permeable for the target gas and a different, non-target gas that can be adsorbed on the surface area. The coating has different diffusion constants for the target gas and the non-target gas. The diffusion constants are coordinated with each other in such a way that the sensitivity of the gas sensor to the target gas increases when the target gas concentration exceeds a predetermined concentration threshold in the presence of the non-target gas. | 10-01-2009 |
| 20090272175 | Procedure for Measuring the Concentration of a Gas - In a procedure for measuring the concentration of a target gas, a gas sensor is provided whose sensor signal at constant temperature is dependent on a target gas concentration and has a lower measurement sensitivity in a first modulation range than in a second modulation range. The position of the modulation ranges is dependent on the temperature. The temperature of the gas sensor is controlled so that the sensor signal is essentially independent of the target gas concentration and lies within the second modulation range. The temperature of the gas sensor is then a measurement for the target gas concentration. | 11-05-2009 |
| 20100176826 | Moisture Sensor and Method for Measuring Moisture of a Gas-Phase Medium - The invention relates to a moisture sensor which comprises a receiving area on its surface for a moisture film, the layer thickness of which is dependent on the relative humidity in the surrounding of the receiving area. The moisture sensor has a signal source which is connected to at least one control electrode at at least one infeed, the electrode abutting the receiving area, for providing a control voltage to the moisture film. The moisture sensor comprises at least one potential sensor which has at least one sensor area, under the receiving area, which is spaced apart from the at least one infeed. The sensor area is electrically insulated from the receiving area by an insulation layer, located between the sensor area and the receiving area, in such a way that an electrical potential can be capacitively detected by means of the potential sensor, the potential being dependent on the layer thickness of the moisture film and the control voltage. | 07-15-2010 |
| 20100270595 | Device for Detection of a Gas or Gas Mixture and Method for Manufacturing Such a Device - A device for detecting a gas or gas mixture has a first and a second gas sensor. The first gas sensor is a MOSFET, which comprises a first source, a first drain, a first channel zone disposed between the latter elements, and a first gas sensitive layer capacitively coupled to the first channel zone that contains palladium and reacts to a change in the concentration of the gas to be detected with a change in its work function. The second gas sensor has, in a semiconductor substrate, a second source, a second drain, and a second channel zone between the latter elements, which is capacitively coupled via an air gap to a suspended gate. The latter comprises a second gas sensitive layer that reacts to a change in the concentration of the gas to be detected with a change in its work function. The second gas sensitive layer is arranged on a support layer and faces the air gap. The support layer is formed by another semiconductor substrate, and the first gas sensor is integrated in the front side of the second semiconductor substrate facing away from the air gap. | 10-28-2010 |
| 20110088466 | HUMIDITY SENSOR - A humidity sensor has, on a substrate, at least one voltage sensor with a sensor region and at least one control electrode. The control electrode is connected to a signal source which is designed such that a variable control voltage can be applied to the control electrode. A moisture-permeable sensor layer whose dielectric constant depends on humidity is located on the sensor region. The control electrode is adjacent to the sensor layer in such a manner that the measured voltage signal of the voltage sensor depends on the control voltage and the humidity. The voltage sensor is connected to an analysis unit for ascertaining the humidity on the basis of the measured voltage signal. In the vertical projection onto the plane in which the substrate extends, the control electrode is located laterally next to the sensor region. | 04-21-2011 |
| Patent application number | Description | Published |
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| 20090050257 | Method and Device for Producing a Tread for a Vehicle Tire - A tread for a vehicle tire, such as a pneumatic vehicle tire, is provided with an electrically conducting layer axially inside a portion of a first, radially outer rubber layer of the tread. The electrically conductive layer extends from a second, radially inner rubber layer of the tread on the radially inner side of the tread rubber material up to a ground contact surface of the tread. The rubber material of the electrically conducting layer and the rubber material of the radially inner rubber layer of the tread have a higher electrical conductivity than the rubber material of the radially outer rubber layer. First, a first rubber layer of higher electrical conductivity is formed over the circumference of the vehicle tire, and an accumulation of rubber material of higher electrical conductivity is built to extend over the circumference of the vehicle tire in a position in the region of axial extent of the layer of rubber material of higher electrical conductivity that is intended to extend up to the ground contact surface in the finished vehicle tire. Then the accumulation of rubber material is shaped to form a web, radially outwards from the inner rubber layer, and in its cross-sectional planes containing the axis of the vehicle tire a predetermined cross-sectional contour. Then the outer rubber layer of lower electrical conductivity is built on the radially outer surface of the first rubber layer, which adjoins the shaped web of rubber material of higher conductivity axially on both sides, and the tread profile is shaped and vulcanized. | 02-26-2009 |
| 20090095390 | Method for Producing a Tread Rubber for a Vehicle Tire, in Particular a Pneumatic Vehicle Tire - A process for producing a tread for a tire with a radially inner layer composed of a first rubber material and with a radially outer second layer composed of a second rubber material and forming the ground-contact surface of the pneumatic tire. The first rubber material has higher electrical conductivity than the second rubber material, and where, in a form of a web axially dividing the second layer around the periphery of the tire, the first rubber material extends radially outwards through the second layer as far as the ground-contact surface. A ply of the first and second layers are constructed radially one on the other, on a rotationally symmetric construction surface, on one of the two axial sides of the web to be produced. | 04-16-2009 |
