Heavy Gold Rack (Wire Mesh Type)
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
One of the process steps in manufacturing multilayer ceramic substrates is the heavy Au plating process step. Conventionally, in such process a heavy Au rack is used to have conductive paste screened onto the I/O pads of the substrate. However, by using a flexible wire mesh assembly in the rack, the same process may simply be achieved. With the new method, no screening of the conductive paste is required. Also, no removal of the paste including cleaning of the substrate is required. Tooling cost for the screener and screening mask, cleaning tank and chemicals is also eliminated. As shown in the figure, cover 1 presses on substrate 2 after the substrate is loaded into rack 3. By pressing on the substrate, the I/O pads make contact with the wire mesh assembly 4 which is connected to rod 5. The rod is electrically charged.