Use of dispersions in making electronic devices

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 C8-20-alkylene and/or C8-20-alkenylene;
• B is C1-6-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.