An add-on card which has a flat surface on the top side on which a plastic quad flat pack integrated circuit packaged integrated circuit can be soldered upon. The other side of the add-on card has downwardly protruding pins that can plug into a pin grid array integrated circuit socket. A method of manufacturing...http://www.google.es/patents/US5486723?utm_source=gb-gplus-sharePatente US5486723 - Packaged integrated circuit add-on card
