Abstract: A universal cableless drive adapter by which a removable carrier can be electrically coupled to a portable computer data storage (e.g. a disk or tape drive) so that the data storage device can communicate with an SCSI bus in a small computer system network while avoiding the common use of ribbon cable and the effects caused by the corresponding stub length on the bus. The universal cableless adapter is attached to the removable drive and includes a fixed I/O connector and a DC power plug, the position of which is adjustable relative to the position of the power connector on the data storage device. Accordingly, the removable carrier can be efficiently coupled to a variety of different computer data storage devices, regardless of the manufacturer of the data storage device, the position of the power connector thereof and the distance between the data storage device and its removable carrier.

Abstract: A liquid cooling system has a structure which permits easy filling, replenishment, or recovery of a cooling liquid for the system, and an electronic device incorporates such a liquid cooling system. The electronic device comprises a heat generating component. The cooling system comprises a jacket connected with the heat generating component, a heat sink, a circulation path through which the cooling liquid circulates between the jacket and the heat sink, and a pump which causes the cooling liquid to circulate through the circulation path. A reservoir tank or pipe incorporates an inner wall which divides the circulation path into two paths. A door enables opening and closing of the inner wall. An opening allows replenishments of the cooling liquid to one of the circulation paths divided in two.

Abstract: A thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support, which may be controlled in a closed-loop manner. Interfacing between circuits, circuit mounting structure, and the support provide for greatly enhanced cooling. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

Abstract: Certain exemplary embodiments of the present invention provide a system for substantially containing a flame, comprising an electrical device enclosure comprising at least one heat-generating electrical device; a substantially planar baffle plate suspended in an aperture defined by said electrical device enclosure, said baffle plate oriented substantially perpendicular to an outlet of a heat-exhausting blower mounted in said electrical device enclosure; and wherein said system meets fire resistance requirements R4-21 and R4-22 of Telcordia standard GR-63-CORE. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. This abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: A heat spreader includes a plate having a first and second ends and a plurality of channels between the ends. A reservoir is located at the first end. A fluid oscillator oscillates a fluid between the first and second ends with a reciprocating flow. The oscillator is integrally contained within the plate.

Abstract: The invention provides for cooling a semiconductor die. The die has plurality of micro-channels. A condenser is in fluid communication with the micro-channels such that the die heats vaporizes fluid at the die to force fluid towards the condenser, and such that gravity pressurizes cooler condenser fluid towards the die. A semiconductor plate such as glass may couple with the die to seal the micro-channels and to form a plurality of fluid conduits for the fluid. Generally, the fluid is alcohol. A first fluid conduit and a second fluid conduit couple between the die's micro-channels and the condenser to form a closed loop thermosyphon system. The condenser is preferably constructed and arranged above the die such that gravity forces cooler fluid to the micro-channels. The micro-channels may be shaped for preferential fluid flow along one direction of the die. The condenser may contain fins to enhance heat transfer to air adjacent the condenser.

Abstract: A heat dissipation device includes a vaporizing portion (10), a condensing portion (20), and a pair of pipes (50a, 50b). The vaporizing portion is attached to a heat-generating electronic chip (40) and contains liquid having great heat conductivity. The condensing portion receives vapor from the vaporizing portion, and cools the vapor to back to liquid form. The pipes are engaged with the vaporizing portion and the condensing portion, thus forming a circulatory route for the vapor from the vaporizing portion to the condensing portion, and for the liquid from the condensing portion to the vaporizing portion.

Abstract: A heat-dissipating member sandwiched between a heat dissipating electronic component which reaches a higher temperature than room temperature due to operation, and a heat-dissipating component for dissipating the heat produced from this heat dissipating electronic component. The heat-dissipating member of this invention has an interlayer comprising a metal foil and/or metal mesh having a thickness of 1-50 &mgr;m and heat conductivity of 10-500 W/mK, and a layer comprising a thermally-conducting composition containing 100 wt parts of a silicone resin and 1,000-3,000 wt parts of a thermally-conducting filler formed on both surfaces of the interlayer such that the overall thickness is within the range of 40-500 &mgr;m.

Abstract: An operating device (10) for detaching a heat sink (40) from a heat-generating electronic device (30) includes a bracket (12) and four handles (14) rotatably connected to the bracket. The bracket includes a pair of first beams (16) and a pair of second beams (18). The second beams perpendicularly connect with the first beams. An opening (21) is thereby defined in a central section of the bracket. A pair of symmetrically opposite pivots (20) extends from each end of each first beam. The handles each include an operating portion (22), and a pressing portion (24) perpendicular to the operating portion. A pair of pivot holes (26) is defined in two junctions of the operating portion and the pressing portion, pivotably receiving corresponding pivots of the bracket.

Abstract: A multi-opening heat-dissipation device for high-power electronic components includes a body, an extension extended from the body, and a radial fan. The radial fan is mounted on a bottom aperture of the body. The body further comprises a primary opening on a first face and a cavity communicating between the bottom aperture and the primary opening as a wind path. The body further includes at least one additional opening on a second face of the body. The at least one additional comprises a second opening faces a circuit board on which a high-power electronic component is mounted. The cool air can flow to at least one of the topside and bottom side of the circuit board through the second opening and cool the high-power electronic components directly.

Abstract: A card connector for electrically connecting a card (21) and a circuit board comprises a housing (22) for accommodating the card detachably in a back-and-forth direction, an ejector (38) provided in the housing and movable with the card in the back-and-forth direction, ejector locking means (45 and 46) for locking the ejector with respect to the housing at an insertion position, card locking means (49) for locking the card with respect to the ejector, and a spring member (44) having a resilient force to the card locking means such that the resilient force becomes stronger as the card and the ejector move forwardly.

Abstract: A flexible printed circuit board of the present invention directly relays connecting portions of a magnetic head placed on a suspension to connecting portions of a base end of a carriage arm in a head suspension assembly of a magnetic disk apparatus. The flexible printed circuit board includes a laminate composed of at least a base layer, a plurality of conductive circuits formed on the base layer, a cover layer covering the conductive circuits, and a conductive polymer layer formed in the insulating material portion in the surface of the laminate. The flexible printed circuit board includes a stainless layer below the base layer or on a lower side of the conductive polymer layer on the base layer side.

Abstract: An apparatus in one example comprises a first card guide base portion and a card guide end portion. The first card guide base portion is connected with a second card guide base portion in a side-by-side relationship. The card guide end portion is employable with the first card guide base portion to comprise one or more portions of a card guide path. The card guide end portion comprises a face of a color that is different from a color of the first card guide base portion.

Abstract: A decorative device includes a decorative laminate for providing luminescence and a driving element for powering and controlling the decorative laminate to provide various ways of luminescence. The decorative laminate includes a first electrode layer, a second electrode layer, a light-emitting layer sandwiched between the electrode layers, a decorative layer covering the first electrode layer, and a protective layer attached to the second electrode layer. The decorative laminate includes a plug connected with a number of wires extended therefrom. The driving element includes a socket for engagement with the plug. The driving element includes a power control unit for providing various voltages to the decorative laminate, a logical control unit for transforming physical conditions into signals, and a central control unit. The central control unit receives the signals from the logical control unit in order to instruct the power control unit to provide various voltages to the decorative laminate.

Abstract: A substrate having a conductive plane and a via passing through the conductive plane is provided. The conductive plane contacts the via to electrically interconnect the via and the conductive plane. A gap in the conductive plane separates a surface of the via from the conductive plane to provide an uninterrupted path for electrical current flowing substantially on the surface of the via.

Abstract: Briefly, in accordance with one embodiment of the invention, an electromagnetic interference (EMI) reduction device may include a circuit and at least one heatsink. The circuit may include analog devices coupled to reduce EMI signals received by the heatsink. The devices may be specifically adapted to substantially invert or phase-shift by 180° the EMI signals received by the heatsink.

Abstract: An instrument panel includes a base on which indicators are movably mounted and a transparent cover positioned above the base. An illuminating device includes a board interposed between the base and the cover. The board defines a number of recesses in a bottom surface thereof for respectively and movably accommodating the indicators therein. The board defines a number of cavities in an end thereof for receiving illuminators, such as light emitting diodes, of different colors therein. The illuminators are connected to and controlled by a control circuit whereby the illuminators are selectively actuated to light the instrument panel with light of different colors by conducting light through the board. Scales of first unit system are formed by means of etching or other suitable manners on the board. Scales of second unit system are formed on the base. The base is provided with an additional light source.

Abstract: The present invention provides keyboard members that can glow in the dark for illuminating a keyboard.

Abstract: A controller for a lighting system is integrated with a light or other device. The controller operates in a local mode to control the integrated light only and in a remote mode to function as a serial network protocol controller for a series of connected devices. In remote mode, an IR/RF remote control is used to change settings for any device connected to the controller. The controller generates a fast serial network protocol instruction sequence, such as a DMX-512 protocol instruction sequence, from the commands received relatively slowly from the IR/RF remote control. The controller can include an hours of operation counter for the integrated light and a global setting function for changing all connected devices simultaneously to a single setting.

Abstract: A combination cap and shoe set is provided wherein each of the cap and shoe include illuminated regions. For example, the brim of the hat may be illuminated in its entirety in a particular color and the sole of the shoe may be illuminated in a complementary color such that a person wearing the cap and shoe of the invention in low light situations may be readily visible. The sole of the shoe may also be substantially uniformly illuminated and the illumination may be controlled independent of any walking motion by the wearer by a manual push-button switch.

Abstract: A display seat for displaying glass and crystal articles of display includes a seat body which is a plate or a layered plate formed from a transparent plastic material or glass. The seat body has a bottom portion formed with a recess. A circuit substrate board having a plurality of light emitting diodes is insertably disposed in the recess. The display seat can be connected to an external power source or a battery source to establish electrical connection for activating the light emitting diodes. Shallow grooves can be formed in a top portion of the seat body for placement of round or curved articles of display. Beams of light emitting from the light emitting diodes penetrate through the plastic or glass seat body toward the articles of display on the seat body.

Abstract: The present invention is a device, which illuminates light inside of a tractor trailer truck van and other loading vehicles at a loading dock during loading and unloading procedures. As professionals working with such vehicles understand, natural lighting is simply not enough to prevent serious loading and unloading accidents, primarily at the deep end of the truck trailer van body. The loading dock spot light of the present invention with its short body design helps prevent fork trucks from hitting and destroying it. The overall short body of the light structure is designed to stay out of the primary main path of the fork truck traffic, allowing the light emitted from the light bulb to just peek beyond the loading dock door seal edge. The present invention is a simple mechanical device, which reduces loading dock operator confusion during loading and unloading operation, maintenance, and repair.

Abstract: The present invention is a bracket assembly for supporting a traffic signal dock light, comprising of a three-dimensional offset face mounting bracket to be mounted to the building exterior loading dock door jamb. The load of the traffic signal light is transferred to the exterior door jamb of the building. The bracket assembly of the present invention has adequate distance between the door jamb and traffic signal dock light to provide proper installation for the dock door seal.

Abstract: A flashlight particularly useful by safety personnel such as a firefighter and capable of operation with rechargeable battery means or non-rechargeable battery means. The flashlight includes a one-piece plastic casing having a tubular body portion defining a battery compartment and a right angled head portion in which a light bulb is mounted. The battery compartment is closed by an end cap on which electrical conductive means is mounted to form a part of the battery circuit when non-rechargeable batteries are placed in the compartment. A plurality of charging contacts are mounted on the rear wall of the body portion of the flashlight for enabling rechargeable batteries to be recharged while in the compartment. The charging contacts are recessed within the rear wall of the battery compartment so that they can not be engaged by non-rechargeable batteries within the compartment.

Abstract: A printed circuit board (PCB) for mounting LEDs in an LED flashlight and a flashlight incorporating the PCB. The PCB includes a circuit board having first and second conductors. The first conductor includes a first section and at least a second section at least partially surrounding the first section. The second conductor includes a first section positioned between the first and second sections of the first conductor and, according to one embodiment, a second section at least partially surrounding the second section of the first conductor. The flashlight includes a housing for receiving a power source, the PCB, LEDs mounted on the PCB, and a switch for turning the flashlight on and off.

Abstract: A switch as for a flashlight selectively connects, for example, a solid state light source and a battery in the flashlight in circuit for causing the solid state light source to produce light. The switch comprises a pushbutton and a metal contact having a periphery that selectively contacts a housing, and a spring. Pressing the pushbutton moves the pushbutton and the metal contact to contact the housing. The metal contact may include a feature for centering the metal contact with respect to the pushbutton and thus with respect to the housing end. The switch may be disposed in a tail cap attached to a flashlight housing.

Abstract: The specification and drawings describe and show one embodiment of the present invention in the form of a sparkle light bulb with a plurality of different colored LED bulbs controlled by a circuit that selectively operates the LED bulbs in color wash mode or color dance mode. The controller circuit also has memory for further selectively locking the LED bulbs in a desired color pattern. The sparkle light housing has guides for aligning and guiding the lamp bulb into a multi-pin receptacle. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope of meaning of the claims. 37 CFR 1.72(b).

Abstract: An apparatus and method for increasing operational life and performance of an arc tube or lamp. The method includes operating the arc tube and applying steps to encourage isothermal conditions around the arc tube. In one embodiment of the method, the arc tube (12) is rotated (40/41) during operation. Another embodiment includes directing air (32/34/26) onto the operating arc tube (12). An exemplary embodiment relates to a substantially high wattage HID unjacketed double ended arc lamp (12) operated in a substantially horizontal position, but the invention is not limited to the same.

Abstract: A system and method of cooling a bulb of a type that requires cooling in one part, but not in others. A deflector assembly is coupled through a reflector, to the bulb, to cool only one part.

Abstract: Disclosed is a mounting structure for a lamp comprising a lamp having a funnel, a frame attached to a front end of the funnel and a connecting bolt provided at a rear portion of the funnel a lamp holder, which is adapted to hold the lamp therein while maintaining a desired lateral gap at each side of the frame of the lamp, have a bottom plate, a front plate and a pair of side plates. The lamp mounting structure maintains an alignment of the optical axis of the lamp while effectively preventing the lamp from being damaged due to a thermal expansion thereof.

Abstract: A lamp head with multiple luminous modes has a frame body. A lateral side of the frame body having a through hole. An inner wall of the through hole has a plurality of clamp seats. Each clamp seat has a positioning pin and an elastomer. Masks are installed on the positioning pin and are clamped by the clamp seat so as to be positioned in the frame body. Thereby, the assembly of the lamp head is formed. The masks are made of material with the same or different transparencies. Thereby, when the light is emitted, by the arrangement of the masks, the lamp present a luminous modes selected from same transparency at two sides different transparencies at two sides, and only one side being transparent.

Abstract: The present invention provides an assembling structure for replaceably assembling a lamp to an image output device. The image output device includes a housing and a lens. The housing includes a first surface having an opening. The lens is positioned on the first surface. The structure of the present invention includes a body being movably disposed within the housing via the opening and a cover corresponding to the opening. The cover is positioned at a first position for covering the opening, and, as the cover is moved to a second position, the opening is exposed allowing the body to move into or move out of the housing through the opening.

Abstract: A do-it-yourself lamp rod is formed by a retaining seat and an inserting rod inserting into the retaining seat. The retaining seat is locked to the inner side of a wire connecting box, and a rectangular inserted hole of the retaining seat has a positioning block therein. Thereby, an inserted hole and the positioning block can be engaged. A limiting ring is locked to the inserting portion of the retaining seat. As the limiting ring is released, then the inserting rod can be pulled out. The wire connecting box and inserting rod can be detached so as to reduce the volume for storing, transferring and packaging. Thereby, the user need only insert the inserting rod into the wire connecting box and then lock the limiting ring and thus the assembly of the present invention is completed. Therefore, the present invention can be assembled by users.

Abstract: An assembly for providing illumination to an automobile wheel having an at least partially transparent wheel covering. The assembly includes a bracket for securing to the a non-rotating portion of an automobile wheel and a light emitting diode or diode array operationally connected to the bracket. A rechargeable battery is electrically connected to the light emitting diode and the light emitting diode, when energized, shines light through the at least partially transparent wheel covering when the wheel covering is rotating.

Abstract: The present invention provides a solution to where many types of vehicle lamps used on and off roads is subject to considerable vibration and impact, which the lamps shifts, rotates, come loose or pop out of the mounting fixture, flange or application where they are secured to. With the use of the Lamp Alignment-Locking Assembly features will secure the lamps to the fixture or direct to the application and can also secure to the fixture to the application if a fixture is used, which will solve the many problems when vehicle lamps are subject to vibration or impact in vehicle or non-vehicle applications used on and off the roadways.

Abstract: The invention concerns a disposable small-size light-emitting device (1) comprising a light source (3); an integrated electronic control module (4), and a power source (5), said electronic control module including means (6) for reducing power consumption of said electronic module and or of said light-emiitting elements, when stored and not in use, and optionally means (7), reducing their inertia on being switched on, and means (8) for switching on/off said light sources. The invention is adaptable and capable of being integrated in all types of disposable light-emitting articles, for fun or not such as for instance glasses, lighters, decorative objects.

Abstract: Synchronous rectifier self drive mechanisms are revealed which are universally applicable to zero voltage switching power converters which rely on an auxiliary inductor to drive the critical turn on transition of the main switch of the power converter. The voltage wave form generated by the auxiliary inductor is well suited to synchronous rectifier self drive. Voltage limiting circuits that reduce the voltage swing of synchronous rectifier gates are also revealed. These voltage limiting circuits reduce the energy circulated into and out of the synchronous rectifier gates and protect the synchronous rectifier gate circuits from negative over voltage.

Abstract: The present invention provides a switching power supply which includes a main rectifying and smoothing circuit (40) and a secondary rectifying and smoothing circuit (50) for rectifying and smoothing an output obtained at a secondary coil (22) of a converter transformer (20) whose primary coil (21) is supplied with a switching output from a switching element (30) which switches a direct input.

Abstract: A DC power converter enclosing a regulated AC power supply within the overall design topology. The power transfer function incorporates a process wherein a portion of the negative AC signal, generated across the input winding of a power transformer, is intercepted by a power switch transitional state. The volt-second product of the intercepted AC signal is reflected into the DC input line voltage as an additive element allowing a resonant inductor to absorb the sum of both components. Thus peak voltage transferred to a resonant capacitor is two times the sum of voltage absorbed by the resonant inductor as opposed to simply doubling the DC input line voltage. Voltage across the resonant capacitor remains constant for variations in DC input line voltage within the limits of the input voltage regulating band. This is due to an inverse relationship between the DC input line voltage and voltage yielded by the negative AC signal, at point of interception by the timing pulse.

Abstract: The present invention relates to an inductive contactless power transmitter having a primary side including a first inductor (LP) on the primary side and an oscillator for producing an alternating signal which is supplied to the inductor (LP) on the primary side, and having a secondary side which includes an inductor on the secondary side that can be coupled to the inductor (LP) on the primary side, a load (RL) which is variable in time, and a detection means (42) for determining a power demand of the load on the secondary side, the first oscillator being a voltage-controlled oscillator having a frequency that is adjustable in response to the power demand determined by the detection means (42).

Abstract: An object of the present invention is to provide a small size output transformer capable of producing sine wave oscillation at stability and high efficiency. A drive circuit including a switching circuit is connected to DC power source input units 12a, 12b, and an output transformer 10 is connected to the drive circuit. At the drive circuit, the switching circuit is turned on and off on the basis of a feedback signal of the primary side resonance voltage induced in the input side primary winding of the output transformer. The energizing direction of the DC power source to the output transformer is converted in clockwise and counter-clockwise direction by the on and off of the switching circuit, and the power source is applied as the AC signal to the input side primary winding of the output transformer. The phase detecting means detects the phase of the resonance waveform at the primary side of the output transformer 10 and outputs the phase signal.

Abstract: A control circuit for current converter valves includes at a user-specific request unit, a digital transmission unit, and at least one interchangeable system-specific control unit. The control unit includes at least one control circuit with a digital interface, a digital processor and analog components for directly controlling the at least one current converter valve.

Abstract: A DC-DC converter in which no operational instability occurs and ranges of input and output voltages are wide, an electric appliance using such DC-DC converter, and a duty-ratio setting circuit in which no operational instability occurs and ranges of input and output voltages of a converter circuit can be widen in controlling the converter circuit are provided. A DC-DC converter 10 has a converter circuit 110, an output voltage detection circuit 120 and a duty-ratio setting circuit 20. An error amplifier circuit 21 compares Vref1 with Vd to output a control voltage Vfb. A pulse-width modulator circuit 25 compares a triangular-wave voltage Vct with the control voltage Vfb to output a first pulse signal PWO. A second-pulse generator circuit 26 outputs a second pulse signal PSO having a predetermined on-duty ratio.

Abstract: A disconnection detecting circuit includes switches for setting a detection signal to be supplied for a signal line, a resistor for supplying the signal line with the detection signal set by the switches and control means for controlling the switches to set the detection signal to be supplied for the signal line and judging whether there is disconnection or not in the signal line on the basis of a change in the detection signal.

Abstract: A rectifier circuit powers three power conversion modules using a three phase AC input without a neutral connection. The rectifier circuit includes a first bridge rectifier that is connected to a first phase of the three phase AC input and that produces a first rectified waveform. A second bridge rectifier is connected to a second phase of the three phase AC input and produces a second rectified waveform. A third bridge rectifier is connected to a third phase of the three phase AC input and produces a third rectified waveform. A first inductor has one end that is connected to the first bridge rectifier. A second inductor has one end that is connected to the second bridge rectifier. A third inductor has one end that is connected to the third bridge rectifier. Opposite ends of the first, second and third inductors are connected to form a virtual neutral. A protection circuit prevents overvoltage when one of the DC outputs is shorted.

Abstract: A dual input AC/DC power converter (10) having dual inputs (12, 14) adapted to receive both an AC and DC input and provide a selectable DC voltage output (16) and a second DC output (18). The dual input AC/DC power converter (10) comprises a power converter circuit (20) having an AC-to-DC converter (22), a DC-to-DC booster converter (24), a feedback circuit (26), a filter circuit (25) and a DC-to-DC buck converter (28). Advantageously, the power converter (10) resolves many of system management problems associated with carrying all of the different interface components necessary to power a wide variety of mobile products from either an AC or DC power supply. In addition, the power converter (10) also advantageously includes dual output voltage terminals (16/18) to allow for multiple mobile devices of varying power requirements to be powered, simultaneously, by a single converter.

Abstract: A power supply apparatus is provide. The power supply apparatus includes a housing, an AC inlet for accepting an AC power supply, a circuit board for converting the AC power supply into a DC power supply, a power cord for transferring the DC power supply to an electrical appliance and having a first end electrically connected to the circuit board, a first plate detachably connected to a first surface of the housing, a second plate detachably connected to a second surface of the housing, the second plate being opposite to the first plate, and a locking element disposed in the vicinity of a second end of the power cord, wherein the power cord is wound around the housing and between the first plate and the second plate to as to secure the power cord for storage.

Abstract: The present invention provides a universal serial bus (USB) voltage transformer, which comprises a main body, a transformer circuit unit, and several connectors. The transformer circuit unit is disposed in or at the inside of the main body. The connectors are electrically connected to the transformer circuit unit directly or via a connection cable. A USB voltage transformer having travel charging function is thus formed. The USB voltage transformer of the present invention can simultaneously charge several portable electronic devices like mobile phones, personal digital assistants, electronic translators, and small cameras.

Abstract: An electronic system according to various aspects of the present invention includes a memory module configured to operate in multiple modes. The memory module includes at least one connection configured to perform different functions when the memory module is operating in different modes. In one embodiment, the memory operates in a normal mode and an SPD mode. While in SPD mode, the connection performs one or more SPD functions, such as operating as an SMBus interface connection. In normal mode, the connection serves a function associated with normal operation of the module, such as addressing functions.

Abstract: In a data storage apparatus comprising means for storing and retrieving data in respective write and read operations, and first and second set of addressing electrodes are provided, the latter set having electrodes that preferably are oriented orthogonally to the electrodes of the first set, and the electrodes (b, c) of the second set are provided as parallel twin electrodes located in parallel recesses or trenches (3) in the electrodes of the first set. The trenches compris a soft ferroelectric or electret memory material with piezoelectric properties such that memory cells (1) with two subcells (&agr;1, &agr;2) are formed in the trench (3) respectively between the electrodes (a) of the first set and the parallel twin electrodes (b, c) on either side of the latter. In a write operation data are encoded in the memory cells (1) by means of an applied voltage potential over the subcells (&agr;1, &agr;2).