Semiconductor device having thin film transistor for supplying current to driven element
AssigneeSanyo Electric Co., Ltd.
InventorsTsutomu Yamada, Katsuya Anzai
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Abstract
Thin film transistors TFT2a and TFT2b for driving elements are formed in parallel between a power source line and an organic EL element, and active layers of the transistors TFT2a and TFT2b are spaced apart in a scanning direction of a laser used for annealing for polycrystallization. As a result, the annealing conditions for the transistors TFT2a and TFT2b will not be exactly the same, thereby reducing the chance of a same problem being caused in both transistors TFT2a and TFT2b.
Claims12
A semiconductor device having on a substrate a plurality of thin film transistors using a semiconductor layer annealed with a line pulsed laser as a channel region, comprising:
- at least one element driving thin film transistor for supplying a driving current from a power source line to a corresponding driven element;
- and
- a switching thin film transistor for controlling said element driving thin film transistor based on a data signal supplied when selected;
- wherein
- said element driving thin film transistor is disposed such that a longitudinal direction of an area irradiated with said line pulsed laser traverses said element driving thin film transistor in a channel width direction thereof.
A semiconductor device having on a substrate a plurality of thin film transistors using a semiconductor layer annealed with a pulsed laser as a channel region, comprising:
- at least one element driving thin film transistor for supplying a driving current from a power source line to a corresponding driven element;
- and
- a switching thin film transistor for controlling said element driving thin film transistor based on a data signal supplied when selected;
- wherein
- said element driving thin film transistor is disposed such that a channel length direction thereof runs substantially parallel to a scanning direction of said pulsed laser.
Dependencies are inferred from the claim text.