Abstract: An ink composition is provided for forming an ultra-thick thick film which is suitable for conducting heat laterally from a heat generating device supported on a substrate. The ink composition is formulated to enable the ultra-thick thick film to be formed as a single layer, such that only a single print, dry and fire cycle is required to form the film. Advantageously, ultra-thick thick films having thicknesses of about 125 micrometers (about 0.005 inch) and greater can be formed by a single layer of the ink composition.

Abstract: An improved squeegee for screen printing a thick film ink onto a substrate of a microelectronics circuit in order to form a thick film on the substrate. The squeegee is specifically configured to eliminate the creation of voids in a thick film deposited using the squeegee by enhancing the flow characteristics of the thick film ink as it is forced through a printing screen by the squeegee. Improved flow characteristics are achieved be appropriately configuring the cross-sectional profile of the squeegee in order to localize the printing forces on the ink at the working edge of the squeegee, in order to prevent ink ahead of the working edge from prematurely filling the openings in the screen.