摘要:
A combination of a radio frequency identification transponder (RFID Tag) and to a magnetic electronic article surveillance (EAS) device is disclosed.
摘要:
A radio frequency (RF) multibit tag structure useful for identifying objects of interest is described. An array of thin cantilevers of slightly different lengths produced by differential etching are coated with a soft magnetic material which upon interrogation with an RF magnetic field vibrate at their resonant frequencies in the presence of an appropriate bias or direct current (DC) field. The oscillating magnetic fields generated by the vibrating bars and the stationary DC field can be readily detected by a receiver and processed to determine the code of the tag and thus provide information related to the object.
摘要:
A programmable tag for being readable remotely and in a manner which does not require that the tag be held in a particular orientation, includes a first layer of material with electron spin resonance absorption, a second layer of hard magnetic material, and a third layer of soft permeable magnetic material. The second layer and third layer are in close proximity to the first layer. The second layer and the third layer impose a magnetic bias field on the first layer.
摘要:
Provides protection to wireless portable transponders from an unauthorized interrogation by employing a mechanical member. Transponders include: cards, fobs and RFID tags that a persons may carry. Such transponders generally have means for receiving and storing electronic and other information, commonly in binary form using memories as in electronic circuits, etc. The invention is designed to provide privacy of electronic information and yet permit the information to be queried at the users discretion. The cards and tags can be protected from receiving or providing unauthorized or unwanted information. The invention provides the mechanical member with means that permit the owner to decide when reception/interrogation of personal or other information is desirable by employing the provided mechanical enable/disable control means.
摘要:
A bonding pad for a semiconductor device is provided with a mechanical supportive structure substantially surrounding the pad. The mechanical supportive structure prevents cracking of passivation material over the pad when a lead is compression bonded to the pad.
摘要:
Silicon and germanium containing materials are used at surface of conductors in electronic devices. Solder can be fluxlessly bonded and wires can be wire bonded to these surfaces. These material are used as a surface coating for lead frames for packaging integrated circuit chips. These materials can be decal transferred onto conductor surfaces or electrolessly or electrolytically disposed thereon.
摘要:
The present invention is an RF tag having a non laminated coating for protecting the semiconductor chip, antenna, and chip antenna connections, and methods for applying the non-laminated coating.
摘要:
A radio frequency (RF) transponder (RF tag) is proposed, where a high dielectric constant material is used in operative cooperation with a tag antenna so that the distance of the tag antenna from conducting or absorbing surfaces may be reduced, and so the tag dimensions may be reduced.
摘要:
A novel thin and flexible radio frequency (RF) tag has a semiconductor circuit with logic, memory, and a radio frequency circuits, connected to an antenna with all interconnections placed on a single plane of wiring without crossovers. The elements of the package (substrate, antenna, and laminated covers) are flexible. The elements of the package are all thin. The tag is thin and flexible, enabling a unique range of applications including: RF ID tagging of credit cards, passports, admission tickets, and postage stamps.
摘要:
A semiconductor chip carrying integrated circuits has lead lines terminating in conductive terminal pads exposed to the exterior through openings in a passivation layer. The pads include pedestals or bumps extending up from them. Each of the pedestals includes a thin metallic adhesion layer deposited on the pad. A thick metallic layer of aluminum or an alloy of aluminum is deposited upon said thin metallic adhesion layer. The thick metallic layer includes at least one metal selected from the group consisting of aluminum, aluminum plus a small percentage of Cu, Ni, Si, or Fe. Several other alternative metals can be added to aluminum to form an alloy. The thick metallic layer forms the bulk of the height of the pedestal. An adhesion layer is deposited on the bump of aluminum composed of a thin film of titanium or chromium. A barrier layer is deposited on the adhesion layer composed of copper, nickel, platinum, palladium or cobalt. A noble metal consisting of gold, palladium, or platinum is deposited on the barrier layer. In a variation of the top surface, a thick cap of a reworkable bonding metal is deposited above the metallic bump as the top surface of said bump. The bump can be composed of a number of metals such as gold, copper, nickel and aluminum in this case with aluminum being preferred. In place of the adhesion and barrier metals one can employ a layer of titanium nitride deposited on said thick layer of metal.