Patent ID: 9307649
Filing Date: 2016-04-05
CPC Classification: H01B,H05K

Claim Text:
1. A process to produce a composition for forming transition vias and transition line conductors comprising the steps of: a. providing a first layer comprising inorganic components selected from the group consisting of 20-45 wt % gold and 80-55 wt % silver dispersed in organic medium; b. providing a second layer comprising 100 wt % silver-gold solid solution alloys dispersed in organic medium; c. applying the first layer to partially fill a via; d. applying the second layer to the first layer to fill the via; and e. co-firing the first layer and the second layer in the via, wherein the first layer and the second layer are in electrical contact with each other, wherein the wt % of gold in the inorganic component of the first layer is greater than the wt % of gold in the inorganic component of the second layer, wherein the difference in diffusion coefficients of the first layer and the second layer is negligible.