Method of Fabricating a Microweld Tip
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
In a microweld apparatus a DC electrical pulse of high power and short duration is applied to a wire positioned across two spaced electrodes that form the microweld tip. The dielectric material used to space the electrodes, normally an epoxy polymer resin, is subjected to high temperature and degrades with use. In this process a glass dielectric material is formed to hold the tip electrodes in accurately spaced relation and to provide a durable dielectric material that will withstand the operating temperatures of the tip. In this process a glass sheet is formed by tape casting a mixture of glass frit and a binder resin. The sheet can be cast to a thickness that is twice the desired spacing, with the density of the mixture ranging 50% of the theoretical. The thickness can be varied with the density of the material.