E.i. Dupont De Nemours and Company

Other

John Graeme Pepin

Steven Dale Ittel

Howard W Jacobson

Haixin Yang

Michael F Barker

Christopher John Roach

Pedro A Jimenez

Cherng Y Wang

Vincent Wen-Yuan Yeh

A conductive paste composition contains a source of an electrically conductive metal, a fusible material, a synthetic clay additive, and an optional etchant additive, dispersed in an organic medium. An article such as a photovoltaic cell is formed by a process having the steps of deposition of the paste composition on a semiconductor substrate by a process such as screen printing and firing the paste to remove the organic medium and sinter the metal and fusible material. The synthetic clay additive aids in establishing a low resistance electrical contact between the front side metallization and underlying semiconductor substrate during firing.

Conductive paste composition with synthetic clay additive and its use in the manufacture of semiconductor devices

The invention is directed to a process and more particularly, to utilizing polymer solutions to make thick film compositions. In one embodiment the process is directed to the formation of photoimageable thick film compositions for use in photo-patterning methods to make photoimageable electrodes in flat panel display applications, including plasma display panels (PDP). Polymer solutions are obtained by directly polymerizing desired monomers in a desired solvent to form a desired polymer, rather than by dissolving a pre-made polymer in a desired solvent. Other ingredients are added to the polymer solution to directly form thick film pastes, including photoimageable thick film pastes.

Polymer solutions, aqueous developable thick film compositions, processes of making and electrodes formed thereof

The invention is directed to a magnetic thick film composition comprising particles of permanent magnetic materials dispersed in organic medium wherein the medium comprises a polymer selected from polyurethane, phenoxy and mixtures thereof, and organic solvent.

Thick film composition yielding magnetic properties

A thick film conductor composition suitable for use in forming terminations for titanate-based MLCs comprising finely divided particles of: (a) electrically conductive precious metal and (b) metal oxide-based glass having a Dilatometer softening point of 400-700 C. comprising at least one glass modifier having an ionic field strength higher than the ionic field strength of the titanate cation, both (a) and (b) being dispersed in an organic medium.

Thermal shock cracking resistant multilayer ceramic capacitor

The invention is directed to an MLC manufacturing process in which the electrode paste is cast or printed onto a rigid substrate. The dried surface of the electrode is rendered smooth to remove surface asperities and the prints are then transferred to the dielectric substrate through a mask which patterns the electrode print on the surface.

Multilayer ceramic capacitor manufacturing process

Finely divided particles of electrically conductive metal having a coating thereon a refractory metal oxide which is insoluble in the electrically conductive metal and non-reducing in the present of the electrically conductive metal, (2) the coating being sufficiently thick that the Isoelectric Point of the coated conductive metal particles is at least 1 unit higher than the Isoelectric Point of particles of the refractory metal oxide, (2) the tap density of the coated metal particles is at least 90% as high as the tap density of the uncoated metal particles, and (3) the metal oxide coating constitutes at least 0.05% by weight of the coated particles.

Metal oxide-coated electrically conductive powders and compositions

A thick film conductor composition suitable for use for electrodes in multilayer capacitors comprising (a) finely divided particles of electrically conductive metal, metal oxide precursors or alloys of the conductive metals, or mixtures thereof, dispersed in (b) an organic medium comprising

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Raleigh, NC, United States of America

John Graeme Pepin