Patent ID: 8128448

Claim:
A manufacturing method for an organic electroluminescent device including: an effectively optical area including a common electrode and display pixels for display, each display pixel having a first electrode and an organic electroluminescent layer; and a dummy area surrounding the effectively optical area, the dummy area including dummy pixels not for display, the dummy pixels having no transistors, the manufacturing method comprising: forming the first electrodes in the display pixels; forming the organic electroluminescent layers in the display pixels and in the dummy pixels by vapor depositing an organic electroluminescent material using a mask, the mask including apertures in a row direction and in a column direction, the apertures corresponding to the display pixels and the dummy pixels which are arranged in a matrix; and forming the common electrode above the organic electroluminescent layers, the common electrode covering the organic electroluminescent layers in the display pixels and the organic electroluminescent layers in the dummy pixels.