Patent ID: 7947518

Claim:
A method for forming electronic devices by using protecting layers, comprising the steps of: providing a substrate, for coating a first electroluminescent material onto a surface of the substrate to form a first light-emitting layer, and forming a first protecting layer onto the first light-emitting layer; performing a first patterning process, for forming a first photoresist layer on the first protecting layer and forming a first photomask to define a required pattern on the first photoresist layer, exposing to remove a portion of the first photoresist layer, and keeping a remaining first photoresist layer; removing a portion of the first protecting layer that is not sheltered by the first photoresist layer to etch the first light-emitting layer; removing the remaining first photoresist layer, such that the first light-emitting layer remains protected by the first protecting layer; coating a second electroluminescent material onto a surface of the substrate, the first light-emitting layer and the first protecting layer to form a second light-emitting layer, and forming a second protecting layer on the second light-emitting layer; performing a second patterning process, for forming a second photoresist layer on the second protecting layer, using an appropriate mask and an exposure process to define a pattern required by the second photoresist layer, exposing to remove a portion of the second photoresist layer, and keeping a remaining second photoresist layer; removing a portion of the second protecting layer that is not sheltered by the second photoresist layer to etch the second light-emitting layer; removing the remaining second photoresist layer, such that the second light-emitting layer remains protected by the second protecting layer; coating a third electroluminescent material onto a surface of the substrate, the first light-emitting layer, the first protecting layer, the second light-emitting layer and the second protecting layer to form a third light-emitting layer, and forming a third protecting layer on the third light-emitting layer; performing a third patterning process, for forming a third photoresist layer on the third protecting layer, using an appropriate mask and an exposure process to define a pattern required by the third photoresist layer, exposing to remove a portion of the third photoresist layer, and keeping a remaining third photoresist layer; removing a portion of the third protecting layer that is not sheltered by the third photoresist layer to each the third light-emitting layer; removing the remaining third photoresist layer, such that the third light-emitting layer remains protected by the third protecting layer; and forming a cathode layer on the first protecting layer, the second protecting layer, and the third protecting layer to form an optoelectronic device having the protecting layer.