A flexible film has electrical interconnections on each side. Through-film interconnects pass through openings in the film to connect the electrical interconnects on opposite sides of the film. Electrical contact patterns are formed on one side of the film to accomodate integrated circuit chips or other...http://www.google.com.tw/patents/US4933810?utm_source=gb-gplus-share專利 US4933810 - Integrated circuit interconnector
