15 results about "Radiation tolerance" patented technology

A Hybrid Switched Capacitor Converter (HSCC) topology is presented that is suitable for high conversion ratio Point-of-Load (PoL) applications. The topology specifically targets 48V to 1V power delivery in space-based high-performance computing systems, where size and weight are important considerations, along with device de-rating for radiation tolerance. One implementation merges an initial 2:1 switched capacitor conversion stage with a symmetric dual inductor hybrid (SDIH) conversion stage, reaping benefits of both. The SDIH stage offers reduced component count and an excellent switch stress figure of merit, while the initial 2:1 voltage reduction stage significantly reduces the volume of flying capacitors, enabling compact size and low weight.

A radiation tolerant data storage apparatus and method. The radiation tolerant data storage apparatus and method can direct and store redundant copies of data in different physical locations to reduce the likelihood that a single radiation particle damages corresponding portions of the multiple copies of data. The radiation tolerant data storage apparatus and method includes a controller that arranges for multiple copies of data to be stored in a manner that reduces collinearity and detect if one copy has been damaged. The copies are preferably stored at physical locations that minimize or otherwise completely avoid the ability for a single radiation particle to damage or flip the same bit in each of the multiple copies of data. Most preferably, numerous other radiation hardening techniques can also be used to provide further radiation tolerance to the system and method.

The present invention relates to the technical field of daily chemicals, specifically to an essence with whitening, beauty-enhancing and radiation-resistant functions and a preparation method thereof. Ferric citrate is added to the essence prepared by the present invention, and ferric citrate can enhance the antioxidant capacity of the skin, reduce the damage of oxygen free radicals to the skin, maintain the elasticity and luster of the skin, and achieve the effect of beauty. Soybean polysaccharides are natural and environmentally friendly, can remove free radicals, and improve cell vitality and cell radiation tolerance. Taxifolin has good radiation resistance and antioxidant properties. The essence with whitening, beauty-enhancing and radiation-resistant functions provided by the present invention adopts a variety of natural active ingredients, has good biocompatibility and safety, can effectively improve skin quality, and protect the skin from radiation and oxidation damage.

The utility model relates to the technical field of film heaters, in particular to an irradiation-resistant heater, which comprises an electric heating layer, a pair of leads and a pair of insulating layers. The electric heating layer is fixedly arranged between the pair of insulating layers; the head ends of the pair of wires are electrically connected with the positive electrode of the electric heating layer and the negative electrode of the electric heating layer respectively. According to the utility model, the thermoplastic connecting layer made of the thermoplastic polyimide material is adopted to replace a bonding layer of a film heater in the prior art, so that the total radiation-resistant dose of the device is improved to 1.0 * 1010rad (SI), and the device can meet the requirements of the use environment outside a spacecraft cabin; the defect that a film heater in the prior art is poor in environment adaptability is overcome.

An electronic device and method for adaptively storing data in bundle form. An aspect of the present disclosure provides an electronic device comprising: a processor; a memory storing instructions; a first storage storing data; and a second storage having a radiation tolerance higher than that of the first storage, wherein, when executed by the processor, the instructions cause the electronic device to transfer data stored in the first storage to the second storage when a deterioration of a space weather environment of a region of space in which the electronic device is located occurs, and to transfer data stored in the second storage to the first storage when the deterioration of the space weather environment is resolved, and wherein the data stored in the first storage or the data stored in the second storage is data that is transmitted to another electronic device via space communications in bundle form.

The utility model discloses a high-power low-density silicon carbide MOSFET device, which relates to the technical field of semiconductor power devices and comprises a drain electrode, a silicon carbide substrate arranged above the drain electrode, a silicon carbide epitaxial layer arranged above the silicon carbide substrate and a conductive base region arranged on the silicon carbide epitaxial layer. A conductive contact layer and a P well region are arranged on the two sides of the upper end of the conductive base region respectively, a conductive shielding layer and an N-drift region are arranged above the P well region and the conductive contact layer respectively, conductor regions are arranged above the N-drift region and the conductive shielding layer respectively, and conductive metal layers are arranged above the two conductor regions respectively. According to the high-power and low-density silicon carbide MOSFET device, better radiation tolerance and electrical performance can be provided for the silicon carbide MOSFET device, the anti-radiation intensity of the silicon carbide MOSFET device is improved, the conduction efficiency, the safety and the reliability of the silicon carbide MOSFET device are improved, and the high-power and low-density characteristics are achieved.

The invention provides a method for analyzing the influence of a barrier layer defect of a high-mobility device on electrical characteristics, and relates to the technical field of electronic components, and the method comprises the steps: carrying out the numerical simulation of a physical process of a particle with preset energy entering an AlGaN / GaN HEMTs device, and obtaining a displacement energy loss spectrum; determining irradiation experiment parameters, and testing the AlGaN / GaN HEMTs device based on the irradiation experiment parameters to obtain a test sample and corresponding electrical performance data before and after irradiation; performing I-DLTS test and EDS scanning on the test sample to obtain a test result; the displacement energy loss spectrum, the corresponding electrical performance data before and after irradiation and the test result are analyzed, the influence of the AlGaN barrier layer defects on the electrical characteristics of the AlGaN / GaN HEMTs device is obtained, and a theoretical basis is provided for improving the radiation tolerance and reliability of the device through deep analysis of a radiation damage mechanism.

To provide a vertical semiconductor device with improved radiation tolerance.SOLUTION: A vertical semiconductor device has a substrate having a first doping type, a drift layer on the substrate having a first doping type, and a diffusion layer on the drift layer having a first doping type, the substrate and drift layer contain silicon carbide, the maximum doping concentration of the diffusion layer is greater than the maximum doping concentration of the drift layer, and the doping concentration of the substrate is greater than the doping concentration of the drift layer.SELECTED DRAWING: Figure 3

The preparation method comprises the following steps: taking silicon as a substrate layer, growing Si3N4 passivation layers on the upper surface and the lower surface of the silicon substrate by adopting a chemical vapor deposition technology, spin-coating a negative photoresist layer on the Si3N4 passivation layer on one surface by utilizing a spin coater, exposing and developing the negative photoresist layer, and repeating the steps on the other surface, thereby obtaining the radiation-resistant ultrafast response silicon detector. Hole patterns formed after photoetching of the front face and the back face are mutually nested, photoresist is washed away through photoresist removing liquid after the exposed part of the Si3N4 passivation layer is removed, then the silicon substrate is soaked in etching liquid to be subjected to constant-temperature and ultrasonic treatment, the silicon substrate is etched to form a three-dimensional hole structure, the residual Si3N4 passivation layer on the surface is removed, and the three-dimensional hole structure is obtained. And finally depositing metal electrodes on the front and back surfaces of the sample respectively. According to the three-dimensional rhombic hole structure provided by the invention, the radiation resistance and ultrafast response capability of the silicon detector can be effectively improved, the selective wet etching quality is high, and the etching cost is low.

The present invention belongs to the technical field of air filtration, and provides an application of a hydrophobic polyethersulfone microporous membrane in air filtration, including a hydrophobic polyethersulfone microporous membrane as a filter membrane of a sterile respirator; the hydrophobic polyethersulfone microporous membrane is prepared by the following method: preparing a modification liquid: the modification liquid includes the following raw materials in mass fractions: 5 to 20 parts of a modifier, 30 to 94.5 parts of a diluent, and 0.5 to 3 parts of an additive, wherein the modifier is one or more of a C6 waterproofing agent, a C8 waterproofing agent, a polyurethane fluorine-free waterproofing agent, and an acrylic fluorine-free waterproofing agent; using a hydrophilic polyethersulfone membrane as a base membrane, soaking the base membrane in the modification liquid, and then drying to obtain a hydrophobic polyethersulfone microporous membrane. The hydrophobic polyethersulfone microporous membrane of the present invention is the best choice material for a respirator in a filter because of its excellent air permeability and hydrophobicity and good gamma irradiation tolerance.

The radiation tolerant software defined radio device for multi-band radio applications in space systems comprising components for terrestrial application not qualified officially for use in space, the components comprisinga power supply,a base band processor, such as e.g. a processor of the Xilinx SoC (system-on-chip) product family Zynq-7000,volatile and non-volatile memories, such as e.g. SDRAM and NAND flash memories,a radio frequency transceiver, such as e.g. the RF agile transceiver AD9361 from Analog Devices, allowing for software-based reconfiguration of various radio frequency characteristics, such as local oscillator frequency, analog filter band width, gain control of input and output amplifiers, sample rates of analog-to-digital converters and digital-to-analog converters, andmitigation mechanisms on hardware and software level for autonomously recovering to a nominal state.

The present invention discloses a rare earth ion-doped borosilicate scintillator glass and its preparation method and application. The rare earth ion-doped borosilicate scintillator glass, by mass percentage, comprises: 23-27% of silicon dioxide; 7-10% of boron trioxide; 1-3% of aluminum fluoride; 1-3% of aluminum oxide; 11-15% of strontium oxide; 9-13% of calcium oxide; 35-38% of gadolinium oxide; 1-3% of cerium dioxide. The rare earth ion-doped borosilicate scintillator glass prepared by the present invention has an average transmittance of 84%-87% at 300-600 nm, a light yield of 1206-1296 ph / MeV, a density of 5.81-5.96 g / cm<supgt;3< / supgt;, a decay time of 100-128 ns, and a radiation tolerance time of 173-198 h.

A system for improving radiation tolerance of memory senses an amount of radiation exposure and, based on the sensed amount of radiation exposure, determines whether to perform one or more techniques for mitigating the effects of the radiation exposure. As an example, the system may perform a data refresh operation by re-writing data that has been corrupted by radiation, or the system may adjust the reference voltage used to read memory cells. In another example, the system may perform a fault repair operation by re-programming cells that have erroneously transitioned from a program state to an erase state. The system may selectively perform different radiation-mitigation techniques in a tiered approach based on the sensed amount of radiation in order to limit the adverse effects of the more invasive techniques.

A system for improving radiation tolerance of memory senses an amount of radiation exposure and, based on the sensed amount of radiation exposure, determines whether to perform one or more techniques for mitigating the effects of the radiation exposure. As an example, the system may perform a data refresh operation by re-writing data that has been corrupted by radiation, or the system may adjust the reference voltage used to read memory cells. In another example, the system may perform a fault repair operation by re-programming cells that have erroneously transitioned from a program state to an erase state. The system may selectively perform different radiation-mitigation techniques in a tiered approach based on the sensed amount of radiation in order to limit the adverse effects of the more invasive techniques.

The invention discloses an erbium-ytterbium co-doped silica optical fiber anti-radiation treatment method based on high-temperature induced phase separation and an optical fiber product. According to the method, three-step high-temperature gradient annealing treatment is carried out on the erbium-ytterbium co-doped silica fiber containing P2O5 under specific conditions, a nanoscale P2O5 phase separation phenomenon is induced in a fiber core in an argon environment, and the stability and radiation resistance of the erbium-ytterbium co-doped silica fiber in a radiation environment are remarkably enhanced. Specifically, the annealing process effectively improves the microstructure characteristics of the fiber core glass, reduces the damage of radiation to the internal structure of the fiber core, and remarkably improves the radiation tolerance of the optical fiber. The erbium-ytterbium co-doped silica fiber prepared by the method is suitable for the fields with high radiation requirements such as space laser communication, laser radar, satellite remote sensing and the like, the service life of the erbium-ytterbium co-doped silica fiber in a space radiation environment can be remarkably prolonged, the fiber performance requirements in an extreme environment are met, and an efficient and controllable technical solution is provided for related applications.