摘要:
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.
摘要:
The present inventive concept relates to a high conductive paste composite which can minimally undergo effects of a negative temperature resistance coefficient (e.g., heat radiation effect 5 to 10 times larger than that of copper or aluminum, high field emission effect, black body radiation, etc.) that the carbon nano tube has in the case of products using the carbon nano tube (MWNT or SWNT), which can solve problems (negative temperature resistance coefficient and high resistance) of a heating part (conductive carbon paste) that converts electric energy of a heating body into thermal energy.
摘要:
A capacitive/resistive device (101) provides both resistive and capacitive functions. The capacitive/resistive device (101) may be embedded within a layer of a printed wiring board (1000). The capacitive/resistive device (101) comprises a first electrode (110); a dielectric (120) disposed over the first electrode (110); a resistor element (140) formed on and adjacent to the dielectric (120); a conductive trace (145); and a second electrode (130) disposed over the dielectric (120) and in electrical contact with the resistor element (140), wherein the dielectric is disposed between the first electrode (110) and the second electrode (130) and wherein the dielectric (120) comprises a polymer filled with a high dielectric constant powder phase.
摘要:
Conductive plastic resistance element having particles of conductive material embedded therein and projecting therefrom for reducing variations in contact resistance in potentiometric device in which the element is employed. The element is made by processing carbon powder, resin, solvent and conductive phases to form a paste, applying the paste to a substrate, and curing the paste to drive off the solvent and form a film, with the conductive phases rising to the surface of the film and becoming embedded therein.
摘要:
A conductive composite is formed which consists of a host polymer and polypyrrole ("P") deposited on and within the host polymer. Instead of using a conductor as a starting substrate, an insulating polymer is at least partially impregnated with sufficient pyrrole (PY) monomer to become conductive after the PY is polymerized. The polymerization is a chemical oxidative polymerization ("dip-polymerization") which, if carried out under anhydrous conditions, transforms the insulating polymer into a semiconductive composite consisting essentially of the host polymer containing a first species of conductive PP and a Group VIII metal halide counterion; thereafter, the semiconductive composite, containing the counterion, is used to electrodeposit on it a second species of conductive PP. The composite with the two species of PP and anions is used for EMI shielding, and in a host of applications where a lightweight organic resistance heating element is desired, for example in de-icers forthe wings of an airplane, to melt snow on roof-tops and in gutters, and to warn a frigid seat in a vehicle.
摘要:
A conductive composite is formed which consists of a host polymer and polypyrrole ("P") deposited on and within the host polymer. Instead of using a conductor as a starting substrate, an insulating polymer is at least partially impregnated with sufficient pyrrole (PY) monomer to become conductive after the PY is polymerized. The polymerization is a chemical oxidative polymerization ("dip-polymerization") which, if carried out under anhydrous conditions, transforms the insulating polymer into a semiconductive composite consisting essentially of the host polymer containing a first species of conductive PP and a Group VIII metal halide counterion; thereafter, the semiconductive composite, containing the counterion, is used to electrodeposit on it a second species of conductive PP. The composite with the two species of PP and anions is used for EMI shielding, and in a host of applications where a lightweight organic resistance heating element is desired, for example in de-icers forthe wings of an airplane, to melt snow on roof-tops and in gutters, and to warn a frigid seat in a vehicle.
摘要:
Es wird ein Verfahren zur Herstellung von Widerstände und/oder Potentiometerbahnen und/oder Schaltkontaktstellen und/oder Kodierschaltanordnungen integriert enthaltenden Schaltungen beschrieben. Zunächst werden ausgehend von einer als vorläufiger Träger dienenden Metallschicht auf dieser aus einer geeigneten Widerstands- bzw. Leitfähigkeitspaste im gewünschten Lay-out Widerstandsschichten entsprechend den zu integrierenden passiven Schaltungsbauteilen erzeugt, vorzugsweise durch Aufdrucken einer oder mehrerer entsprechender Widerstandspaste (n) im Siebdruckverfahren; im weiteren Verlauf wird das mit dem Widerstands- Lay-out und ggf. mit dem Leitermuster versehene Gebilde zur Aushärtung des Polymer-Widerstandsmaterials einer Wärmebehandlung bei einer ausreichend hohen Temperatur vorzugsweise im Bereich von 180-250°C unterworfen, welche eine optimale mechanische und elektrische Stabilisierung der Widerstandsschichten ergibt; danach wird das ausgehärtete Gebilde aus der mit dem Widerstands-Lay-out und ggf. dem Leitungsmuster versehenen Metallschicht mit der beschichteten Seite auf eine als permanenter Schaltungsträger dienende Isolierstoffplatte vorzugsweise aus einem faserverstärkten Hartpapiermaterial auflaminiert, unter Verwendung eines Epoxydharzklebers; in einem abschließenden Verfahrensschritt wird die als vorläufige Trägerschicht dienende Metallschicht schließlich vollständig oder selektiv abgeätzt. Die Erzeugung der Leiterbahnen kann entweder im additiven Verfahren auf der beschichteten Seite der als vorläufiger Träger dienenden Metallschicht vor deren Umkehr-Laminierung erfolgen, wobei in dem abschließenden Verfahrensschritt nach der Umkehr-Laminierung die ursprüngliche Träger-Metallschicht vollständig entfernt wird. Alternativ kann die Erzeugung der Leiterbahnen jedoch auch im subtraktiven Verfahren nach der Umkehr-Laminierung des vorläufigen Gebildes auf die permanente Isolierstoff-Trägerplatte erfolgen, und zwar durch abschließende selektive Ätzung der ursprünglichen, als vorläufiger Träger dienenden Metallschicht.
摘要:
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) .025 -20 wt. % carbon nanoparticles, wherein all of (a), (b), (c) and (d) are dispersed in a 60-80 wt. % organic solvent.