One aspect relates to a method for producing an electrical bushing for an implantable medical device. The method includes generating an insulation element green compact for an insulation element from an insulating composition of materials. The insulation element green compact is partially sintered. At least one cermet-containing conduction element green compact for a conduction element is formed. The at least one conduction element green compact is introduced into the insulation element green compact. The insulation element green compact and the at least one conduction element green compact are fired to obtain an insulation element with at least one conduction element.

Method of producing a cermet-containing bushing for an implantable medical device

A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a microemulsion on the surface of the metal substrate. The microemulsion is a thermodynamically stable, isotropic liquid mixture that contains a precursor monomer, sulfonic acid, nonionic surfactant, and solvent.

Wet capacitor cathode containing a conductive coating formed anodic electrochemical polymerization of a microemulsion

A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating is formed through anodic electrochemical polymerization (“electro-polymerization”) of a precursor colloidal suspension on the surface of the substrate. The colloidal suspension includes a precursor monomer, ionic surfactant, and sulfonic acid, which when employed in combination can synergistically improve the degree of surface coverage and overall conductivity of the coating.

Wet Capacitor Cathode Containing a Conductive Coating Formed Anodic Electrochemical Polymerization of a Colloidal Suspension

A capacitor for use in ultrahigh voltage environments is provided. During formation of the capacitor, the forming voltage employed during anodization is generally about 300 volts or more and at temperatures ranging from about 10° C. to about 70° C. Such conditions can substantially improve the quality and thickness of the dielectric without adversely impacting the uniformity and consistency of its surface coverage. In addition, the solid electrolyte is also formed from a dispersion of preformed conductive polymer particles. In this manner, the electrolyte may remain generally free of high energy radicals (e.g., Fe2+ or Fe3+ ions) that can lead to dielectric degradation, particularly at the ultrahigh voltages noted above.

Ultrahigh voltage solid electrolytic capacitor

A solid electrolytic capacitor that contains an anode body, dielectric overlying the anode body, adhesion coating overlying the dielectric, and solid electrolyte overlying the adhesion coating. The solid electrolyte contains an inner conductive polymer layer and outer conductive polymer layer, at least one of which is formed from a plurality of pre-polymerized conductive polymer particles. Furthermore, the adhesion coating contains a discontinuous precoat layer containing a plurality of discrete nanoprojections of a manganese oxide (e.g., manganese dioxide).

Solid electrolytic capacitor containing conductive polymer particles

A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The present inventors have discovered a technique that is believed to substantially improve the uniformity and consistency of the manganese oxide layer. This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric. Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner. This improves the quality of the resulting oxide as well as its surface coverage, and thereby enhances the electrical performance of the capacitor.

Solid Electrolytic Capacitor for Use in High Voltage Applications

A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, an electrolyte, and a cathode containing a metal substrate on which is disposed a conductive coating is provided. Prior to application of the conductive coating, the metal substrate is blasted with abrasive particles to enhance the ability of the substrate to adhere to the coating. The micro-roughened metal substrate can be treated after blasting so that substantially all of the abrasive particles are removed. This is accomplished by contacting the metal substrate with an extraction solution to remove the particles, and also by selectively controlling the nature of the abrasive particles so that they are dispersible (e.g., soluble) in the solution.

Abrasive Blasted Cathode of a Wet Electrolytic Capacitor

A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided The powder has a high specific charge and in turn a relative dense packing configuration Despite being formed from such a powder, the present inventors have discovered that a manganese precursor solution (eg, manganese nitrate) can be readily impregnated into the pores of the anode This is accomplished, in part, through the use of a dispersant in the precursor solution that helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric Instead, the precursor solution can be better dispersed so that the resulting manganese oxide has a “film-like” configuration and coats at least a portion of the anode in a substantially uniform manner This improves the quality of the resulting oxide as well as its surface coverage, and thereby enhances the electrical performance of the capacitor

David Masheder

Papers

Wet capacitor cathode containing a conductive coating formed anodic electrochemical polymerization of a microemulsion

Wet Capacitor Cathode Containing a Conductive Coating Formed Anodic Electrochemical Polymerization of a Colloidal Suspension

Solid Electrolytic Capacitor for Use in High Voltage Applications

Abrasive Blasted Cathode of a Wet Electrolytic Capacitor

Solid Electrolytic Capacitor Containing an Improved Manganese Oxide Electrolyte