Patent ID: 7195949
Filing Date: 2007-03-27
Classification: G09G,H01L

Abstract:
1. A method of making a current type active matrix OLED device, comprising: a) providing a semiconductor layer over a substrate; b) providing a conductive layer over the substrate; c) providing an insulator layer between the semiconductor layer and the conductive layer; d) providing an organic light emitting diode over either the semiconductor layer or over the conductive layer for each pixel for producing light emission; e) forming a first transistor having a channel region formed in the semiconductor layer and a gate formed in the conductive layer for each pixel for receiving a first current data signal for adjusting the emission brightness in its corresponding pixel; f) forming a second transistor for each pixel for regulating current through the organic light emitting diode in response to the first current wherein each second transistor has a gate formed in the conductive layer and a channel region formed in the semiconductor layer; and g) annealing regions of the semiconductor layer before or after formation of the first and second transistors by using a pulsed laser providing one or more laser pulses provided by a source that irradiates such regions of the semiconductor layer associated with a portion of the channel region of the first transistor and a portion of the channel region of the second transistor.