163 results about "Microheater" patented technology

The present disclosure relates to an electronic smoking article that provides for improved aerosol delivery. Particularly, the article comprises one or more microheaters. In various embodiments, the microheaters provide for improved control of vaporization of an aerosol precursor composition and provide for reduced power requirements to achieve consistent aerosolization. The present disclosure further relates to methods of forming an aerosol in a smoking article.

A microheater and a microheater array are provided. The microheater includes a substrate, a column disposed on the substrate and a bridge supported by the column. A width of a portion of a bridge formed on the column is less than a width of a portion of the bridge that does not contact the column. The bridge may include a spring component.

A nanoelectronic sensing device includes a substrate, a nanostructure element disposed adjacent the substrate, and at least a conductive element electrically connected to the nanostructure element. The device is configured to heat at least a portion of the sensor structure including the nanostructure element. In certain embodiments, the nanostructure element comprises at least one nanotube, the nanotube being electrically connected to at least two conductors so as to permit an electric current on the order of 10 microAmps or greater to be passed through the nanotube, causing the nanotube to heat up relative to the substrate. In alternative embodiments, the sensing device includes a platform or membrane which is at least partially thermally isolated by one or more cavities, the platform supporting at least the nanostructure element adjacent to a microheater element. The heating of the sensor structure may be employed, for example, for thermoregulation, to accelerate and/or increase sensor response, and to improve other sensor characteristics.

Devices for enhancing the sensitivity of a microsensor or any other micro device by providing on-line preconcentration. Microconcentrators that can be integrated with a sensor or a micromachined GC to enhance the signal to noise ratio can include a miniaturized sorbent trap fabricated on a microchip. The microconcentrator can be made on a silicon substrate so that a sensor can be integrated on the same chip. The microconcentrator is composed of at least one microchannel lined with a microheater for in-situ heating. Preconcentration may be achieved on a thin-film polymeric layer deposited above the heater in the microchannel. Rapid heating by the channel heater generates a “desorption pulse” to be injected into a detector or a sensor.

Provided are a micro gas sensor for measuring a gas concentration configured to achieve a high heating and cooling rate of a gas sensitive layer, achieve temperature uniformity, and achieve durability against thermal impact and mechanical impact; and a method for manufacturing the micro gas sensor. The micro gas sensor includes: a vacuum cavity disposed in a substrate; a support layer covering the vacuum cavity; a sealing layer sealing the support layer and the vacuum cavity; a micro heater disposed on the sealing layer; a plurality of electrodes disposed on the micro heater, insulated from the micro heater; and a gas sensitive layer covering the electrodes.

The invention relates to a non-refrigerant thermopile infrared detector and a manufacturing method thereof. The invention is characterized in that a micro heater is arranged in the infrared absorption area of a non-refrigerant thermopile infrared detector. Because the manufacturing process of the micro heater is completely compatible with that of the thermopile, the two processes are integrated on one chip. By using the micro heater to measure the thermal conduction of the encapsulated infrared detector, the invention realizes the measurement of the vacuum degree of an encapsulated device; and by using the micro heater to simulate the operation state of the thermopile infrared detector, the invention realizes the wafer level self-test of the infrared performance of the detector. The invention can be used for mass production, can monitor the key process step of wafer level bonding and vacuum encapsulation, and can realize the wafer level measurement of the infrared performance of the detector. Besides, the invention improves the device-testing efficiency, reduces the testing cost, and can realize a low-cost and high-performance non-refrigerant thermopile infrared detector.

The invention discloses a three-dimensional graphene/carbon nanotube network flexible multifunctional strain sensor preparation method. According to the invention, the three-dimensional network of three-dimensional graphene and a one-dimensional carbon nanotube grows through two-step chemical vapor deposition; and the three-dimensional network and an elastic polymer as a flexible substrate are solidified and combined to acquire a flexible wearable multifunctional electronic strain sensor based on the three-dimensional network of the graphene and the carbon nanotube. According to the invention, the electronic strain sensor breaks the limitation relationship between the strainability and the sensitivity of the strain sensor, has an excellent electronic strain sensing performance and the function of a micro heater, realizes high sensitivity detection of human physiological signals and physical activities, shows excellent electronic skin simulation capabilities and a micro heating source application performance, has the advantage of simple process, and can be widely used in many fields such as clinical diagnosis, health monitoring, a robot, an electronic screen, electronic skin, a flexible micro heater and intelligent home.

The invention discloses a continuous gas in-tube solid phase microextraction device combined with gas chromatography (GC) for use. The continuous gas in-tube solid phase microextraction device comprises a continuous gas in-tube solid phase microextraction device and a sampling device, wherein the continuous gas in-tube solid phase microextraction device is composed of an in-tube solid phase microextraction needle, a semiconductor condenser, a microheater and an inert gas connecting pipe, and the sampling device is composed of the in-tube solid phase microextraction needle, and a stop valve, a carrier gas flow controller and a gas source which are connected in sequence through a connector connected with a port of an extraction needle on one end of the in-tube solid phase microextraction needle and are used with the gas chromatography. According to the invention, the extraction needle performs thermal desorption at a GC sample inlet without changing the GC sample inlet and thus the continuous gas in-tube solid phase microextraction device is applied to the GC with any brand. The invention has the advantages of simple operating method, high extraction rate, accurate quantification, hydrophilic environment, convenient automatic operation and the like and also provides a sample pretreatment method integrated with extraction, separation and concentration. The continuous gas in-tube solid phase microextraction device can greatly promote the combination use of the SPME (solid phase microextraction) technology and the GC/MS (mass spectra) technology and applications of micro constituents in complex samples in aspects of on-site analysis, on-line analysis and in-situ analysis.

The present invention provides a micro thermoelectric gas sensor having a thermoelectric conversion section, a microheater, a catalyst layer formed on the microheater and to be heated by the microheater, which acts as a catalyst for catalytic combustion of a combustible gas, and a sensor detection section with an electrode pattern therefore formed on a membrane of a predetermined thickness, and a method for forming a micropattern of a functional material of a catalyst or resistor in a predetermined position on a substrate in a state in which the microstructure of the functional material remains controlled.

The invention relates to a three-dimensional micro heater with a groove-shaped heating film region and a manufacturing method thereof. The three-dimensional micro heater is characterized in that: the groove-shaped heating film region of which the cross section is in a V-shaped or an inverse trapezoid-shaped structure is connected with a substrate framework through a supporting suspended beam; a heat resistance wire is distributed inside a groove of the heating film region in the form of fold line and is connected with the electrode on the substrate framework through a lead wire on the supporting suspended beam; and a heat insulation cavities formed by a silicon anisotropic wet etching method is arranged below the heating film region and the supporting suspended beam. The heat resistance wire of the three-dimensional micro heater is distributed inside the groove of the heating film region with a three-dimensional structure, has low heat loss caused by heat convection and is favorable for reducing power consumption of the heater. The groove structure concentrates heat, improves the heating efficiency and is favorable for application of the heater in the fields of infrared light sources and sensing.

A tissue mimicking phantom is disclosed, in which the tissue-mimicking phantom comprises: at least an upper gelatin layer, each configured with at least a sunken area; at least a lower gelatin layer, each disposed beneath the at least one upper gelatin layer while being configured with at least a microchannel network having blood-mimicking fluid flowing therein; and at least a micro-heater. By the use of the sunken area of the at least one upper gelatin layer to simulate shapes and depths of different trauma wounds, the healing of anyone of the trauma wounds can be accessed clinically through a physical properties test while subjecting the trauma wound under different negative pressures and different dressings.

The invention relates to a low-power consumption micro-heater with a mesh-structured heating film and a fabrication method thereof, and the micro-heater is characterized in that the micro-heater comprises the heating film with a mesh structure formed by regular arrangement of special-shaped meshes according to certain rules, the heating film is connected with a substrate frame through a support cantilever beam, and heating resistance wires are arranged on the heating film in the fold line way and connected with an electrode for a lead wire on the substrate frame through the support cantileverbeam. The structure can not only effectively reduce the heat conduction from the area of the heating film of the heater to the support cantilever beam, further reduce the power consumption of the device and expand the fabrication methods of the heater. The heater is particularly applicable to applications in the field of gas detection.

A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ_(T) of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·λ_(T)] between a thermal conductivity λ_(T) of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th−To)/2].

The invention discloses a field programmable gate array (FPGA)-based temperature control and temperature compensation circuit device for a silicon microgyroscope. The FPGA-based temperature control and temperature compensation circuit device comprises a microgyroscope integrated with a miniature heater and a temperature sensor, an interface circuit and an FPGA processing circuit; a temperature control loop, a drive control loop and a detection control loop are formed by mutual connection. The chip-level temperature control and temperature compensation of the silicon microgyroscope are achieved by using the temperature sensor and the miniature heater integrated inside the microgyroscope. The FPGA-based temperature control and temperature compensation circuit device has the advantages of high sensitivity, good repeatability, small inertia, high reliability of temperature information, small power consumption, high control accuracy and the like, the effect of temperature drift of an analogue circuit is reduced by an FPGA-based digital temperature control and temperature compensation platform, meanwhile, a digitalized platform is flexible to adjust parameters, and strong in function, kinds of complicated temperature control and temperature compensation algorithms can be flexibly achieved, and optimization of the performance of the system is facilitated.

A microheater and a method of manufacturing the same are disclosed. The microheater includes a substrate, graphene disposed on the substrate and formed in a pattern; and a passivation layer disposed on the graphene. The method of manufacturing a microheater involves transferring graphene to a substrate, forming a first pattern for supplying electric power to the graphene, forming an electrode on the first pattern, forming a second pattern for focusing heating in the graphene, and forming a passivation layer on the graphene having the electrode and the second pattern formed therein.

To provide a microheater which gives a desired temperature and starts an exothermic reaction upon immediate contact with air and in which plural microheaters can be chained or incorporated in a packaging material.

A microheater having a heat generating composition molded body made of a moldable heat generating composition containing surplus water as a connecting substance accommodated in an air-permeable accommodating bag, which is characterized in that the accommodating bag is made of a heat seal layer-containing substrate and a covering material and has an exothermic part as formed by laminating a heat generating composition molded body as molded on the substrate which is substantially planar and does not have a pocket, an accommodating division and an accommodating section, covering by the covering material and heat sealing the periphery of the heat generating composition molded body; that the moldable heat generating composition contains, as essential components, an iron powder, a carbon component, a reaction accelerator and water, has a content of water in the moldable heat generating composition of from 1 to 60%, does not contain a flocculant aid, a flocculant, an agglomeration aid, a dry binder, a dry binding agent, a dry binding material, a sticky raw material, a thickener and an excipient, contains surplus water so as to have a water mobility value of from 0.01 to 20, with the water in the heat generating composition not functioning as a barrier layer, and is capable of causing an exothermic reaction upon contact with air; that a volume of the heat generating composition molded body is from 0.1 to 30 cm³, and a ratio of a capacity of the exothermic part to the volume of the heat generating composition molded body is from 0.6 to 1.0; and that a maximum height of the exothermic part is from 0.1 to 10 mm.

The invention relates to a micro electro mechanical system (MEMS) gyroscope, a chip level temperature control method thereof and a processing method thereof. A microheater and a temperature sensor are processed on a glass substrate by a micromachining technique; the glass substrate is bonded with an MEMS gyroscope structure chip; the MEMS gyroscope chip is heated by applying voltage at the two ends of the microheater; and the integrated temperature sensor monitors the temperature of the MEMS gyroscope chip in real time so as to drive a peripheral circuit to adjust the voltage at the two ends of the heater and keep the temperature of the gyroscope chip constant and a little higher than the upper limit of the temperature of the working environment. The heater and the temperature sensor are integrated on the glass substrate, the volume is small and the temperature sensitivity is high. The chip level temperature control method has the characteristics of low power consumption, small volume, high applicability and high repeatability, can be compatible with the micromachining process, can realize batch production, and can be widely applied to chip level temperature control of other MEMS chips.

A humidity sensing apparatus and method includes a humidity sensor capable of measuring relative humidity and a heater located about and proximate to the humidity sensor wherein a portion of the heater comprises a material that permits a diffusion of air through the material of the heater. A sensing area is generally formed between the heater and the humidity sensor, wherein the heater provides a heated environment within the sensing area in order to evaporate water droplets that form within the sensing area and reduce relative humidity to a measurable level and measure supersaturated air within the sensing area.

Provided are a real-time PCR monitoring apparatus and method. The real-time PCR monitoring apparatus includes a microchip-type PCR tube that has a PCR solution-containing PCR chamber, a micro-heater that applies heat to the PCR chamber of the PCR tube, a detection unit that detects a PCR product signal based on the amount of a PCR product of the PCR solution, a plurality of modules, each of which includes a cooling fan for lowering the inside air temperature and a control unit for adjusting the temperature of the PCR chamber of the PCR tube by controlling the micro-heater and the cooling fan, and receives the PCR tube, the micro-heater, and the detection unit, a base instrument that includes a power supply unit electrically connected to the modules for power supply and a data communication unit electrically connected to the modules for data communication with the control unit of each of the modules, and a display unit that displays data received from the data communication unit, wherein the control unit of each of the modules independently controls at least one of both the detection unit and the temperature of the PCR chamber of the PCR tube received in each of the modules. Therefore, co-amplification of different samples at different temperature conditions can be carried out and monitored in real time.

The invention discloses a continuous gas liquid phase microextraction device in conjunction with a gas chromatography, which consists of the continuous gas liquid phase microextraction device and a sampling device, wherein the continuous gas liquid phase microextraction device consists of a liquid phase microextraction syringe, a semiconductor condenser, a miniature heater and a gas flow controller for communicating with inert gas; and the sampling device in conjunction with the gas chromatography consists of the liquid phase microextraction syringe, a solvent tank, a waste liquid bottle, a four-way sampling valve connected with a stepping motor, a gas flow controller, a pressure-regulating valve and a gas source. The continuous gas liquid phase microextraction device has the beneficial effects that the continuous gas liquid phase microextraction device is the extension of liquid phase microextraction, the sample pretreatment time is shortened, the error generated by manual operation is eliminated, and the continuous gas liquid phase microextraction device has the advantages of convenience in use, accuracy in quantifying, good experimental result reproducibility, automation realization and the like. The conjunction of a liquid phase microextraction technology with the gas chromatography and the application of on-line analysis of trace components in a complicated sample are realized.