KEMET Electronics Corporation

Provided is a monolithic multilayered ceramic capacitor comprising multiple capacitive couples encased in a continuous ceramic. The continuous ceramic further comprises a ceramic separator between adjacent capacitive couples. Each capacitive couple comprises active electrodes wherein first active electrodes of adjacent active electrodes of each capacitive couple are in electrical contact with a first external termination and second active electrodes of adjacent active electrodes of each capacitive couple are in electrical contact with a second external termination.

Provided is a capacitor and method of forming the capacitor. The capacitor comprises a first capacitive couple comprising a first dielectric on a first anode and a first cathode on the first dielectric. The first anode and first cathode are connected to a lead frame comprising a discontinuous surface coating wherein the discontinuous surface coating comprises a contact region and a discontinuous region. At least one of the first anode or the first cathode is in electrical contact at the contact region. An encapsulant is in contact with the lead frame at the discontinuous region.

An improved process for forming powder, an anode of the powder and a capacitor comprising the powder is provided. The process comprises forming a dense aggregate comprising a powder and solvent in a pendular, funicular or capillary state and freeze drying the powder comprising high surface area.

Provided is an improved method for forming a solid electrolytic capacitor. The method includes forming a first dielectric oxide on a tantalum anode by applying a first formation electrolyte on the anode; forming a second dielectric oxide on the first dielectric oxide by applying a second formation electrolyte on the anode; wherein at least one of the first formation electrolyte or the second formation electrolyte comprises a derivative of inositol as defined by Formula 1: Wherein each of R 1 -R 6 is defined.

An improved dispersion, which is particularly suitable for use in forming a hybrid capacitor, and improved method for forming a hybrid capacitor, and an improved capacitor is provided. The method comprises forming a dispersion comprising a conductive polymer, a dispersing agent, a monomer of the conductive polymer and a molar excess of anionic counterion per mole of conductive polymer and monomer. The dispersion is homogenized to form a homogenized dispersion. A capacitor is formed comprising a conductive layer formed from the homogenized dispersion.

An improved process for forming powder, an anode of the powder and a capacitor comprising the powder is provided. The process comprises forming a dense aggregate comprising a powder and solvent in a pendular, funicular or capillary state and freeze drying the powder comprising high surface area.

Provided is a process for providing a flake powder characterized by a particle size of −40 mesh to +200 mesh; a Scott density of at least 1.458 g/cm 3 ; and a flow of at least 1 g/s. The process includes introducing a milled flake powder in a solvent to a first dryer; removing the solvent at a temperature below a melting point of the solvent under a reduced atmosphere to obtain a partially dry flake powder; and introducing the partially dry flake powder to a second dryer to form flake powder wherein particles of partially dry flake powder are heated and simultaneously subjected to an uncorrelated motion relative to adjacent particles.

Provided is an improved method for preparing an electrolytic capacitor comprising: forming an anode with a dielectric on the anode; forming a conductive polymer layer on the dielectric wherein the forming of the conductive polymer layer comprises sequential applying multiple layers of a conductive polymer on the dielectric; applying a treatment to the conductive polymer layer wherein the treatment comprises applying a dopant wherein the dopant comprises: a carboxylic acid compound defined by the formula: R 2 —(C(O)OX 3 ) m ; and a compound selected from the group consisting of: an aromatic sulfonate compound defined by the formula: R 1 —(S(O) 2 OX 1 ) n and a phosphorus containing compound defined by: R 3 —(O x P(O)(OX 4 ) 2 ) p wherein all groups are defined.

Provided is a solid electrolytic capacitor with an improve capacitance stability. The capacitor comprises an anode with a dielectric on the anode. A cathode is on the dielectric wherein the cathode comprises a first solid electrolyte layer wherein the first solid electrolyte layer preferably comprises a first polymer and has a first glass transition temperature. A second solid electrolyte layer is on the first solid electrolyte layer wherein the second solid electrolyte layer preferably comprises a second polymer and has a second glass transition temperature which is higher than the first glass transition temperature.

An improved dispersion, which is particularly suitable for use in forming a hybrid capacitor, and improved method for forming a hybrid capacitor, and an improved capacitor is provided. The method comprises forming a dispersion comprising a conductive polymer, a dispersing agent, a monomer of the conductive polymer and a molar excess of anionic counterion per mole of conductive polymer and monomer. The dispersion is homogenized to form a homogenized dispersion. A capacitor is formed comprising a conductive layer formed from the homogenized dispersion.