58results about How to "Electric field strength" patented technology

An insulated-gate semiconductor device includes: an n+-type current spreading layer disposed on an n−-type drift layer; a p-type base region disposed on the current spreading layer; a n+-type main-electrode region arranged in an upper portion of the base region; an insulated-gate electrode structure provided in a trench; and a p+-type gate-bottom protection-region being in contact with a bottom of the trench, including a plurality of openings through which a part of the current spreading layer penetrates, being selectively buried in the current spreading layer, wherein positions of the openings cut on both sides of a central line of the trench are shifted from each other about the central line in a longitudinal direction of the trench in a planar pattern.

The present invention provides a liquid crystal device and electric device. The liquid crystal device includes a liquid crystal layer having liquid crystal which demonstrates an optically isotropic property when no electric field is applied and demonstrates an optically anisotropic property which is proportional to the square of the electric field strength when electric field is applied, and a pair of substrates which sandwich the liquid crystal layer, including sub-pixel areas (9') each including a reflective display area for reflective display and a transmissive display area for transmissive display; and first and second electrodes (9, 19) provided in both of the reflective display area and the transmissive display area, wherein the liquid crystal layer is driven by an electric field generated between the first electrode (9) and the second electrode (19), and wherein the distance between the first electrode (9) and the second electrode (19) in the transmissive display area is smaller than the distance between the first electrode (9) and the second electrode (19) in the reflective display area.

RF electric fields produced by electric potential differences in NMR probe coil windings may penetrate the NMR sample and sample tube causing sensitivity loss and noise in NMR spectroscopy. Counter-wound spiral coils placed on the opposite surfaces of a planar substrate or on two adjacent planar substrates produce electric potentials that minimize the electric field over the sample region, thereby increasing the sensitivity of the NMR probe. Alternatively counter-wound spiral coils placed adjacent to each other on the outer surface of two concentric cylindrical surfaces that surround the NMR sample minimize the electric field over the sample region. The electric potential of the spiral coils is reduced by adjusting a length of at least one coil.

The invention provides a self-powered electrorheological elastomer damper which comprises an insulating shell, a pressing rod, an upper pressing plate, piezoelectric ceramic, a lower pressing plate, multiple electrode plates and electrorheological elastomers. A through hole is formed in the top of the insulating shell, the pressing rod penetrates the through hole, the upper pressing plate, the lower pressing plate, the electrode plates and the electrorheological elastomers are mounted in an inner cavity of the insulating shell, insulating paper is arranged between the pressing rod and the upper pressing plate, the piezoelectric ceramic is disposed between the upper pressing plate and the lower pressing plate, the electrode plates are disposed in the inner cavity of the insulating shell, insulating paper is arranged between the lower pressing plate and the electrode plates, one electrorheological elastomer is arranged between each two adjacent electrode plates, the upper pressing plate and the lower pressing plate are connected with the electrode plates through leads respectively, and the two electrode plates corresponding to a same electrorheological elastomer are connected with the upper pressing plate and the lower pressing plate respectively. The piezoelectric ceramic which is cylindrical is adopted for power generation, so that a strong electric field can be provided for the electrorheological elastomers, and self powering of the damper is realized; the self-powered electrorheological elastomer damper can adapt to vibrating environment better to realize vibration inhibiting.

The present disclosure provides a flow-through electroporation device configured for use in an automated multi-module cell processing environment and configured to decrease cell processing time and the risk of clogging.

An optical modulator is provided with a stripe-shaped optical waveguide, which has an upper clad layer, a lower clad layer formed between the upper clad layer and a substrate, and an undoped core layer which is arranged between the upper clad layer and the lower clad layer and has a complex refractive index that changes corresponding to the intensity of an applied electric field, to a signal light propagating inside. On both sides of the stripe-shaped optical waveguide, conductor walls are configured by arranging a pair of parallel blocking flat boards with an insulating wall in between. Thus, the semiconductor optical modulator having a high optical modulation efficiency is provided.

The invention belongs to the field of structural and mechanical vibration isolation. For shock absorbing devices adopting intelligent materials, it is needed to apply external magnetic field or electric field excitation, it is needed to extra supply energy for shock absorbers, a corresponding control algorithm is designed, so that a vibration isolation system becomes complicated. The invention provides an electrorheological elastomer shock absorber with a self-coupling function. A plurality of power generating pull rods are installed between a shock absorbing pressing rod and the inner cavitytop surface of an upper shell, and an dielectric elastomer stack for power generation is on the upper portions of the power generating pull rods; flexible electrodes between dielectric elastomer thinpieces are in spaced connection with positive and negative electrode extraction electrodes; electrode pieces between electrorheological elastomer single bodies are in spaced connection with positive and negative electrodes of the dielectric elastomer stack; the shock absorbing pressing rod transmits vibration energy to the dielectric elastomer power generating pull rods and the dielectric elastomer stack therein is driven to undergo tension and compression deformation; the dielectric elastomer stack and an electrorheological elastomer laminated construction below the shock absorbing pressing rod are good in rigidity matching performance; and a strong electric field can be provided, and the self-coupling function is achieved.

The invention discloses a microwave sensor for measuring the biological sample dielectric property. The microwave sensor comprises a coplanar waveguide transmission line and multiple open-ended slot line stubs which are connected in series and loaded on a conduction band in the middle of the coplanar waveguide transmission line, the open-ended slot line stubs are used for gathering electric fieldsso as to improve the accuracy and sensitivity of detection, the open-ended slot line stubs are provided with test areas used for placing tested biological samples, and an input port and an output port of the coplanar waveguide transmission line are connected with a vector network analyzer through SMA connectors respectively. The testing device is simple in structure and high in sensitivity, the open-ended slot line stubs on the sensor are machined through a traditional etching process, the price is low, the machining difficulty is low, batch production is facilitated, and online real-time wide-band detection can be achieved.

A biosensor of the present invention comprises a first microelectrode and a second microelectrode, each provided in the form of a hair comb and disposed in an alternating fashion on a substrate; and aplurality of receptors fixed in a space between the microelectrodes and reactive specifically to a target biological material, wherein, in particular, a micropattern made of a conductive material isformed in the space between the microelectrodes. Accordingly, the biosensor of the present invention can obtain a larger magnetic field strength than a biosensor with no micropattern, and can concentrate the target biological material even more efficiently with a dielectrophoretic force. Furthermore, the biosensor can protect biological molecules from damage by reducing the strength of voltage fordielectrophoresis, and can be easily applied, such as being commercialized as a healthcare sensor for disease diagnosis.

Stripe-shaped surface transistor structures of a power MOSFET are disposed over an array of parallel-extending P type Buried Stripe-Shaped Charge Compensation Regions (BSSCCRs). The power MOSFET has two and only two epitaxial semiconductor layers, and the BSSCCRs are disposed at the interface between these layers. Looping around the area occupied by these parallel-extending BSSCCRs is a P type ring-shaped BSSCCR. At the upper semiconductor surface are disposed three P type surface rings. The inner surface ring and outer surface ring are coupled together by a bridging metal member, but the center surface ring is floating. The bridging metal member is disposed at least in part over the ring-shaped BSSCCR. The MOSFET has a high breakdown voltage, a low RDS(ON), and is acceptable and suitable for manufacture at semiconductor fabrication plants that cannot or typically do not make superjunction MOSFETs.

The invention provides a self-powered electrorheological elastomer damper which comprises an insulating shell, a pressing rod, an upper pressing plate, piezoelectric ceramic, a lower pressing plate, multiple electrode plates and electrorheological elastomers. A through hole is formed in the top of the insulating shell, the pressing rod penetrates the through hole, the upper pressing plate, the lower pressing plate, the electrode plates and the electrorheological elastomers are mounted in an inner cavity of the insulating shell, insulating paper is arranged between the pressing rod and the upper pressing plate, the piezoelectric ceramic is disposed between the upper pressing plate and the lower pressing plate, the electrode plates are disposed in the inner cavity of the insulating shell, insulating paper is arranged between the lower pressing plate and the electrode plates, one electrorheological elastomer is arranged between each two adjacent electrode plates, the upper pressing plate and the lower pressing plate are connected with the electrode plates through leads respectively, and the two electrode plates corresponding to a same electrorheological elastomer are connected with the upper pressing plate and the lower pressing plate respectively. The piezoelectric ceramic which is cylindrical is adopted for power generation, so that a strong electric field can be provided for the electrorheological elastomers, and self powering of the damper is realized; the self-powered electrorheological elastomer damper can adapt to vibrating environment better to realize vibration inhibiting.

The invention discloses non-oil-stick paint and application thereof. The non-oil-stick paint is prepared from the following raw materials in part by weight: 40 to 60 parts of barium carbonate, 30 to 50 parts of nano-titanium dioxide and 90 to 120 parts of thinner. The non-oil-stick paint is sprayed on an electrode plate and pollutants, such as oil smoke are repelled by an electric field produced by the paint, so that an electrode is effectively protected from being polluted and discharge normally under the action of the electric field.