Patent ID: 7442327

Claim:
The use of a dispersion in the manufacture of an electrical device comprising the steps of: a) dispersing an electronic particulate solid in a liquid carrier utilizing a dispersant of formula 1 or formula 2 forming a dispersion, said electronic particulate solid comprising a dielectric material or a conductive material, b) applying said electronic particulate solid from said dispersion as a layer forming a dielectric layer or a electrically conductive track, and c) optionally firing said electronic particulate solid at 600-1200° C., wherein said dispersion comprises an electronic particulate solid, a carrier and a dispersant of formula 1 or formula 2 R—(O-A-CO) x (O—B—CO) y -Z 1 wherein R is hydrogen or a polymerisation terminating group; A is C 8-20 -alkylene and/or C 8-20 -alkenylene; B is C 1-6 -alkylene or a lactone thereof; Z is hydroxyl or a basic group or a moiety containing a basic group; x is from 2 to 45; y is from 0 to 15; the ratio of x:y is not less than 3:1: X-x-x-X represents the polyamine or polyimine; Y represents the polyester chain moiety R—(O-A-CO) x (O—B—CO) y —; and q is from 4 to 2,000 wherein said electrical device comprises various patterns of conductive channels from conductive particulate material separated by a dielectric material formed from dielectric particulate.