A flexible thin film provides interior miniature conducting contact pads which mesh with the extension pins of a pin grid array to establish a tensioned reliable electrical contact. These contacts each connect to an exterior point which is available for probing even while the pin grid array is inserted...http://www.google.com.au/patents/US4703984?utm_source=gb-gplus-sharePatent US4703984 - Flexible access connector with miniature slotted pads
