498results about "Thick film resistors" patented technology

Devices capable of protecting electronic components during the occurrence of a disturbance event using printed circuit board manufacturing techniques. A three (3) layer structure is formed comprising a polymer-based formulation sandwiched between two electrode layers. The devices can be manufactured in panel form providing high quantities of devices which can be removed from the panel and applied directly to the component to be protected. Desired patterns can be formed on either one of the electrode layers by photo-etch techniques thereby providing a process that can be tailored to a large number of applications.

Resistive elements include a patterned region of nanofabric having a predetermined area, where the nanofabric has a selected sheet resistance; and first and second electrical contacts contacting the patterned region of nanofabric and in spaced relation to each other. The resistance of the element between the first and second electrical contacts is determined by the selected sheet resistance of the nanofabric, the area of nanofabric, and the spaced relation of the first and second electrical contacts. The bulk resistance is tunable.

An improved electrical circuit that includes an embedded electrical component and an embedded voltage variable material (“VVM”) is provided. In one embodiment, the embedded VVM is provided as a voltage variable substrate, which is used in combination with an embedded electrical component, such as an embedded resistive material or an embedded capacitive material.

A resistive composition for screen printing onto a substrate. The resistive composition, based on total composition has a) 5-30 wt. % of polymer resin, b) greater than 0 up to and including 10 wt. % of thermosetting resin, c) 10-30 wt. % conductive particles selected from the group consisting of carbon black, graphite and mixtures thereof and d) 0.025 -20 wt. % carbon nanoparticles, wherein all of (a), (b), (c) and (d) are dispersed in a 60-80 wt. % organic solvent.

The invention is directed to a method to embed a thick film resistor composition into a printed wiring board comprising the steps of applying a reinforcing composition onto a resistor composition disposed on a metallic substrate forming an assembly wherein the resistor composition is at least partially coated with the reinforcing composition; processing the assembly; and applying the assembly onto at least one side of an organic substrate forming a component wherein the organic substrate is at least partially coated with an adhesive layer and wherein the reinforcing composition side of the assembly is embedded into the adhesive layer. The reinforcing composition allows laser trimming of the fired resistor and also eliminates cracking during lamination steps of the invention.

A composite magnetic material including a resin and generally spherical magnetic metal particles of at least one type dispersed in the resin and consisting essentially of single crystal grains, the metal particles having a mean particle size of 0.1 to 10 μm and each having an insulating coating layer at least partially coated thereon.

The present invention provides electronically conducting polymer films formed from photosensitive formulations of pyrrole and an electron acceptor that have been selectively exposed to UV light, laser light, or electron beams. The formulations may include photoinitiators, flexibilizers, solvents and the like. These solutions can be used in applications including printed circuit boards and through-hole plating and enable direct metallization processes on non-conducting substrates. After forming the conductive polymer patterns, a printed wiring board can be formed by sensitizing the polymer with palladium and electrolytically depositing copper.

Resistive elements include a patterned region of nanofabric having a predetermined area, where the nanofabric has a selected sheet resistance; and first and second electrical contacts contacting the patterned region of nanofabric and in spaced relation to each other. The resistance of the element between the first and second electrical contacts is determined by the selected sheet resistance of the nanofabric, the area of nanofabric, and the spaced relation of the first and second electrical contacts. The bulk resistance is tunable.

Resistance or side electrodes of a chip resistor is prevented from being lost due to chemical reaction with NaCl contained in human sweat and so on when human sweat, seawater, etc. are adhered thereto. The chip resistor comprises an insulating substrate, thick-film upper surface electrodes formed at opposite ends of the top surface of the insulating substrate, a thin-film resistance made of a constituent material not reacting with NaCl, and formed so as to be extended over the upper surface of the insulating substrate and respective portions of the upper surface of the thick-film upper surface electrodes, thick-film back surface electrodes formed at spots on the back surface of the insulating substrate, corresponding to the thick-film upper surface electrodes, respectively, and thick-film side surface electrodes connecting the thick-film back surface electrodes with respective portions of the thick-film upper surface electrodes, exposed out of the thin-film resistance, respectively.

A chip resistor (R1) includes a resistor element (1) having a first surface (1a) and a second surface (1b) opposite to the first surface. Two main electrodes (21), spaced from each other, are provided on the first surface (1a), while two auxiliary electrodes (22), spaced from each other, are provided on the second surface (1b). The auxiliary electrodes face the main electrodes (21) via the resistor element (1). The main electrodes (21) and the auxiliary electrodes (22) are made of the same material.

A chip resistor (R1) includes a resistor element (1) having a first surface (1a) and a second surface (1b) opposite to the first surface. Two main electrodes (21), spaced from each other, are provided on the first surface (1a), while two auxiliary electrodes (22), spaced from each other, are provided on the second surface (1b). The auxiliary electrodes face the main electrodes (21) via the resistor element (1). The main electrodes (21) and the auxiliary electrodes (22) are made of the same material.

Disclosed is a PCB including an embedded resistor and a method of fabricating the same. The PCB includes a plurality of circuit layers in which circuit patterns are formed. A plurality of insulating layers is each interposed between the circuit layers. The embedded resistor is made of a resistive material and received in a receiving hole formed in the plurality of circuit layers and the plurality of insulating layers such that walls defining the receiving hole extends from one of the circuit layers to another circuit layer. The receiving hole has a closed section, and a conductive material is plated on the opposite walls of the walls defining the receiving hole.

The present invention teaches formulations, apparatus and a method of applying high thixotropic index polymer thick-film resistive pastes for making polymer thick-film resistors with improved tolerances by providing a squeegee with a blade tilted at an angle of 10 to 85 to the surface of the printed circuit board thus causing a fluid rotational motion within the bead of the polymer thick-film resistive paste as the squeegee blade moves relative to the printed circuit board. This rotational motion increases the shear strain rate experienced by the paste within the bead and results in a more effective filling of the resistor-shaped cavity without including air bubbles, experiencing elastic recovery of the paste and, without surface fractures of the paste.

A chip resistor includes an insulating substrate 2 in the form of a chip having an upper surface and an opposite pair of side surfaces, a resistor film 4 formed on the upper surface of the insulating substrate 2, a pair of upper electrodes 5 formed on the upper surface of the insulating substrate 2 to flank the resistor film 4 in electrical connection thereto, a cover coat 6 covering the resistor film 4, an auxiliary upper electrode 7 formed on each of the upper electrodes 5 and including a first portion 7a adjoining the relevant side surface of the insulating substrate 2 and a second portion 7b overlapping the cover coat 6, and a side electrode 8 formed on each of the side surfaces of the insulating substrate 2 and electrically connected to at least the upper electrode 5 and the auxiliary upper electrode 7. The first portion 7a of the auxiliary upper electrode 7 has an obverse surface positioned higher than an obverse surface of the second portion 7b for projecting above an obverse surface of the cover coat 6.

Provided are: a ruthenium oxide powder which is produced, at low cost, as a material for electronic components such as a chip resistor, a hybrid IC and a resistive network each having a sufficient performance, even if the ruthenium content thereof is low; a composition for thick film resistor elements, which uses the ruthenium oxide powder; and a thick film resistor element. Specifically provided are: a ruthenium oxide (RuO2) powder having a rutile crystal structure, which is characterized in that the crystallite diameter of the (110) plane as determined by an X-ray diffraction method is 3-10 nm and the Ru content is 73% by mass or more; a composition for thick film resistor elements, which is obtained by blending a glass powder and conductive particles that are formed of the ruthenium oxide powder as main constituent elements; and a thick resistor element paste, which is obtained by dispersing the composition for thick film resistor elements in an organic vehicle that contains a fatty acid, and which is characterized in that the content of the fatty acid is 0.1-10 parts by weight per 100 parts by weight of the ruthenium oxide.

The resistor device is provided with a resistive plate (11) of metal plate material, which is used as a resistance body; a radiative plate (15) of metal plate material, which is spaced from the resistive plate and intercrossed on the resistive plate; a molded resin body (19), which encloses an intercrossing portion of the resistive plate and the radiative plate; terminal portions of the resistive plate (11a), which comprises so that both ends of the resistive plate extending from the molded resin body are bent along an end face and a bottom face of the molded resin body; and terminal portions of the radiative plate (15a), which comprises so that both ends of the radiative plate extending from the molded resin body are bent along an end face and a bottom face of the molded resin body. Accordingly, the surface-mountable resin-sealed metal plate resistor device is enabled to increase the power capacity drastically and to improve the reliability without changing most of the size.

A resistor device includes a resistor plate having a first aperture, a second aperture, a third aperture and a fourth aperture respectively arranged on a first side, a second side, a third side and a fourth side thereof. A first electrode plate is coupled to the first side of the resistor plate and includes a first measurement zone and a second measurement zone disposed at opposite sides of the first aperture; and a second electrode plate is coupled to the third side of the resistor plate and including a third measurement zone and a fourth measurement zone disposed at opposite sides of the third aperture, wherein the first measurement zone and the third measurement zone are disposed at opposite sides of the second aperture, and the second measurement zone and the fourth measurement zone are disposed at opposite sides of the fourth aperture.

The invention discloses a rare earth thick film circuit controllable electroheat (resistor) element based on microcrystalline glass substrate and the preparation method thereof. The element includes a substrate and a series of electric slurry. The electric slurry is formed on the substrate and includes packaging slurry and electrode slurry. Each kind of the electric slurry is composed of three parts: a functional phase, an inorganic binding phase and an organic carrier phase. The electric slurry also includes rare earth resistor slurry. Also disclosed includes a microcrystalline glass substrate, and formulas for packaging slurry, rare earth resistor slurry, and rare earth electrode slurry. The invention has the advantages of vertical heat transmission, uniform and controllable heating temperature field, rapid respond speed, high power density, strong thermal impact resistance, no magnetic leakage, green, environment protection, energy saving, and high safety and reliability.

The invention discloses middle temperature sintering thick-film resistance paste based on a high-temperature-resistant flexible substrate and a preparation method thereof. The thick-film resistance paste comprises an inorganic bonding phase, a composite function phase, a TCR regulator and an organic carrier. The inorganic bonding phase is formed by SiO2, Bi2O3, B2O3, P2O5, Al2O3, Li2O and CaF2; the composite function phase is formed by micron flake silver powders, micron spherical silver powders and nanometer silver powders; and the organic carrier is formed by organic solvents, macromolecule thickeners, high-temperature-resistant organic resin, surfactants, plasticizers, dispersants, antifoaming agents and thixotropic agents. The preparation method comprises the steps of preparation of the inorganic bonding phase, preparation of the composite function phase, preparation of the organic carrier and preparation of the resistance paste. The thick-film resistance paste is low in sintering temperature, short in sintering time, large in adhesive force, resistant to aging, high in flexibility, adjustable in square resistance, low and adjustable in resistance temperature coefficient and excellent in printing characteristic and sintering characteristic, and can be matched with the high-temperature-resistant flexible substrate.

A chip-shaped electronic part includes: a substrate; a pair of upper surface electrodes formed on an upper surface of the substrate; a functional element formed to be electrically connected to the upper surface electrode pair; a pair of lower surface electrodes formed on a lower surface of the substrate at positions opposing the upper surface electrode pair; a pair of end surface electrodes formed on end surfaces of the substrate so that each of the end surface electrode pair is electrically connected to one of the upper surface electrode pair, and to one of the lower surface electrode pair corresponding to the one upper surface electrode; a protective film formed in such a manner as to cover at least the functional element; and a plated layer formed in such a manner as to cover at least each of the upper surface electrode pair, wherein the protective film or the plated layer has at least two points of application at which a load from above the substrate is exerted.

The present invention relates to a chip resistor and method for making the same. The chip resistor includes a substrate, a pair of bottom electrodes, a resistive film, a pair of main upper electrodes, a first protective coat, a pair of barrier layers, a second protective coat, a pair of side electrodes and at least one plated layer. The first protective coat is disposed over the resistive film, and covers part of the main upper electrodes. The barrier layers are disposed on the main upper electrodes, and cover part of the first protective coat. The second protective coat is disposed on the first protective coat, and covers part of the barrier layers. The plated layers cover the barrier layers, the bottom electrodes and the side electrodes. As a result, the chip resistor features high corrosion resistance.

A multilayer ceramic electronic component includes an electronic component body including a laminate and an external electrode, and a pair of metal terminals that are joined by a joining material. The pair of metal terminals includes a terminal joint portion, an extended portion and a mounting portion. The external electrode is provided only on both end surfaces of the laminate, and includes first and second external electrodes. The first external electrode and the second external electrode each include a saddle portion with a thickness larger than the thickness of a center portion of each end surface in the periphery of the first end surface and the second end surface of the laminate, respectively.

Surface-mountable conductive polymer electronic devices include at least one conductive polymer active layer laminated between upper and lower electrodes. Upper and lower insulation layers, respectively, sandwich the upper and lower electrodes. First and second planar conductive terminals are formed on the lower insulation layer. First and second cross-conductors are provided by plated through-hole vias, whereby the cross-conductors connect each of the electrodes to one of the terminals. Certain embodiments include two or more active layers, arranged in a vertically-stacked configuration and electrically connected by the cross-conductors and electrodes in parallel. Several embodiments include at least one cross-conductor having a chamfered or beveled entry hole through the upper insulation layer to provide enhanced adhesion between the cross-conductor and the insulation layer. Several methods for manufacturing the present surface-mountable conductive polymer electronic devices are also provided.

A resistive component suitable for detecting electric current in a circuit and a method of manufacturing the resistive component are provided. The resistive component includes a carrier, a resistive layer, an electrode unit, an upper oxide layer and a protective layer. The resistive layer comprises copper alloy and is disposed on the carrier. The electrode unit is electrically connected to the resistive layer. The upper oxide layer is disposed on a part of a surface of the resistive layer and includes oxides of the resistive layer. The protective layer covers at least a part of the upper oxide layer.