The present invention discloses a color filter by copper and silver film, comprising: a lower copper layer; a lower silver layer formed on the lower copper layer; a medium formed on the lower silver layer; an upper copper layer formed on the medium; and an upper silver layer formed on the upper copper...http://www.google.co.uk/patents/US8221888?utm_source=gb-gplus-sharePatent US8221888 - Color filter by copper and silver film and method for making same
