A method for making a luminescent key. The key has a 3-dimensional shape and is extraordinarily thin. Besides, the key evenly emits luminescence. The key can be used in a mobile phone to save space so that more components can be put in to the mobile phone....http://www.google.fr/patents/US7294033?utm_source=gb-gplus-shareBrevet US7294033 - Method for fabricating luminescent solid key
