32 results about "Silver ion transport" patented technology

The invention provides an improved electrotransport drug delivery system for analgesic drugs, namely fentanyl and sufentanil. The fentanyl / sufentanil is provided as a water soluble salt (eg, fentanyl hydrochloride) dispersed in a hydrogel formulation for use in an electrotransport device (10). In accordance with one aspect of the invention, the concentration of fentanyl / sufentanil in the donor reservoir (26) solution is above a predetermined minimum concentration, whereby the transdermal electrotransport flux of fentanyl / sufentanil is maintained independent of the concentration of fentanyl / sufentanil in solution. In accordance with a second aspect of the present invention, the donor reservoir (26) of the electrotransport delivery device (10) is comprised of silver and the donor reservoir (26) contains a predetermined “excess” loading of fentanyl / sufentanil halide to prevent silver ion migration with attendant skin discoloration. In accordance with a third aspect of the present invention, a transdermal electrotransport delivered dose of fentanyl / sufentanil is provided which is sufficient to induce analgesia in (eg, adult) human patients suffering from moderate-to-severe pain associated with major surgical procedures.

The invention provides an improved electrotransport drug delivery system for analgesic drugs, namely fentanyl and sufentanil. The fentanyl / sufentanil is provided as a water soluble salt (eg, fentanyl hydrochloride) dispersed in a hydrogel formulation for use in an electrotransport device (10). In accordance with one aspect of the invention, the concentration of fentanyl / sufentanil in the donor reservoir (26) solution is above a predetermined minimum concentration, whereby the transdermal electrotransport flux of fentanyl / sufentanil is maintained independent of the concentration of fentanyl / sufentanil in solution. In accordance with a second aspect of the present invention, the donor reservoir (26) of the electrotransport delivery device (10) is comprised of silver and the donor reservoir (26) contains a predetermined “excess” loading of fentanyl / sufentanil halide to prevent silver ion migration with attendant skin discoloration. In accordance with a third aspect of the present invention, a transdermal electrotransport delivered dose of fentanyl / sufentanil is provided which is sufficient to induce analgesia in (eg, adult) human patients suffering from moderate-to-severe pain associated with major surgical procedures.

A capacitor that is capable of exhibiting good properties under humid conditions is provided. The ability to perform under such conditions is due in part to selective control over the particular nature of the solid electrolyte and cathode coating that overlies the solid electrolyte. For example, the solid electrolyte contains pre-polymerized conductive polymer particles, which can help act as a blocking layer for any silver ions migrating through the capacitor. Likewise, the cathode coating also contains conductive metal particles (e.g., silver particles) that are dispersed within a resinous matrix. The resinous matrix includes a polymer that absorbs only a small amount of water, if any, when placed in a humid atmosphere.

A test circuit for a touch screen sensor, connected to a DC voltage and a reference voltage, including a first interface, a second interface, a combination switch, a voltage comparison module and an indication module, the first interface and the second interface connect the touch screen sensor to the Odd-numbered silver paste leads and even-numbered silver paste leads are connected to the combination switch, and the combination switch is connected to the DC voltage, reference voltage and voltage comparison module; the combination switch is applied through the first interface and the second interface. The DC voltage or reference voltage is detected on the touch screen sensor, and then the detection voltage is output to the voltage comparison module for comparison, and the indication module presents whether silver paste occurs on the silver paste line according to the comparison result of the voltage comparison module Migration instructions. It can accurately test the silver ion migration status between adjacent lines on the touch screen sensor, adjust the test electrical conditions, and has strong flexibility. Only two lead wires are needed for wiring, and it has the advantages of simple operability and high operability.

A touch screen sensor test circuit, connected to a DC voltage, including a first interface, a second interface, a self-excited oscillation module, a combination switch, a voltage comparison module and an indication module, the first interface and the second interface respectively connect the touch screen The odd-numbered silver paste leads and the even-numbered silver paste leads on the device are connected to the combination switch, and the self-excited oscillation module converts the DC voltage into an AC voltage and then inputs it to the combination switch; the combination switch passes through the first The interface and the second interface apply the AC voltage or DC voltage to the touch screen sensor for detection, and then output the detection voltage to the voltage comparison module for comparison, and the comparison result presents an indication of whether silver paste migration occurs in the silver paste line. It can accurately test the silver ion migration status between adjacent lines on the touch screen sensor, adjust the test electrical conditions, and has strong flexibility. Only two lead wires are needed for wiring, and it has the advantages of simple operability and high operability.

The invention belongs to the technical field of material chemistry, relates to conductive ink, and particularly relates to nano copper-tin alloy conductive ink and a preparation method and usage of the nano copper-tin alloy conductive ink. Nano copper-silver alloy is replaced by nano copper-tin alloy to be used as conductive filler in the conductive ink, sintering temperature of the conductive ink is lowered, and when the nano copper-tin alloy conductive ink is compared with nano copper-silver alloy conductive ink, antioxidant capacity of the conductive ink during sintering is improved, mechanical property and solderability of a conductive circuit formed after sintering of the conductive ink are improved, and the problem of silver ion migration is avoided. Further, since rare earth metal elements are doped in the nano copper-tin alloy, grain boundary of the nano copper-tin alloy is increased, electron scattering power is increased, and conductivity is improved as compared with that of nano copper alloy. On the other hand, tin is much cheaper than silver, so that raw material cost of the nano copper-tin alloy conductive ink is reduced.

A tooling device for detecting the migration of silver ions, comprising a rotary table and a support frame base; the rotary table includes a four-layer structure, the first layer is circular, the second layer is semi-cylindrical, and the third layer is circular , the fourth layer is hemispherical, the first layer, the second layer, the third layer and the fourth layer of the rotating table are sequentially connected; the base of the support frame is stepped cylindrical, and the center of the support frame base is provided with a through hole; the fourth layer of the turntable is detachably installed in the through hole of the support frame base; the diameter of the fourth layer of hemisphere of the turntable is greater than the diameter of the through hole of the support frame base; the turntable can be Rotate horizontally or tiltingly or a combination of both on the base of the support frame.

The invention relates to a preparation method of an antibacterial ceramic thin film and belongs to the technical field of preparation of the antibacterial ceramic thin film. Aiming at the problems that silver ions are heated to be decomposed and discolored easily and then appearance of a ceramic product is influenced due to need of high-temperature firing of an existing silver antibacterial ceramic thin film as well as the antibacterial endurance of the silver antibacterial ceramic thin film is affected by fast release of the silver ions, the antibacterial ceramic thin film is provided and is characterized in that copper and silver ions are composited, the strength of the copper and silver composite particles is enhanced through composition with polylactic acid, and by means of composition of copper and silver, the silver ion migration capacity is reduced, the silver ions are prevented from being released too fast, and the action endurance of the antibacterial ceramic thin film is enhanced. The action time of the antibacterial ceramic thin film prepared with the method is prolonged by 15%-20%, the antibacterial ratio is as high as 85%, and besides, the preparation process is simple, green, environment-friendly and pollution-free.

A composition for forming a silver ion diffusion-suppressing layer includes an insulating resin and a compound including: a structure selected from the group consisting of a triazole structure, a thiadiazole structure and a benzimidazole structure; a mercapto group; and at least one hydrocarbon group optionally containing a heteroatom, with the total number of carbon atoms in the hydrocarbon group or groups being 5 or more. The composition for forming a silver ion diffusion-suppressing layer allows formation of a silver ion diffusion-suppressing layer capable of suppressing silver ion migration between metal interconnects containing silver or a silver alloy to improve the reliability on the insulation between the metal interconnects.