Display device including reinforcement and barrier layers

1 . A display device comprising:

a substrate having a tensile force;

a reinforcement layer on the substrate; and

a display layer comprising a barrier layer on the reinforcement layer,

wherein a number of hydrogen atoms of the reinforcement layer per unit volume is less than a number of hydrogen atoms of the barrier layer per unit volume such that the reinforcement layer has a compressive force offsetting the tensile force of the substrate.

2 . The display device of claim 1 , wherein the reinforcement layer has a stress resistance of 650 MPa or less.

3 . The display device of claim 1 , wherein a number of hydrogen atoms contained in the reinforcement layer per unit volume is 6.42×10 20 or less.

4 . The display device of claim 1 , wherein the reinforcement layer comprises a silicon oxide.

5 . A display device comprising:

a substrate having a tensile force;

a reinforcement layer on the substrate; and

a display layer comprising a barrier layer on the reinforcement layer,

wherein the reinforcement layer comprises a silicon nitride, and

a ratio of a bond between nitrogen and hydrogen of the silicon nitride to a bond between silicon and hydrogen per unit volume is 22 or less such that the reinforcement layer has a compressive force offsetting the tensile force of the substrate.

6 . The display device of claim 5 , wherein a ratio of the nitrogen to the silicon per unit volume is 1.1 or less.

7 . The display device of claim 1 or 5 , wherein the reinforcement layer comprises:

a first reinforcement layer on the substrate; and

a second reinforcement layer between the first reinforcement layer and the barrier layer.

8 . The display device of claim 1 or 5 , wherein a thickness of the reinforcement layer is 5,000 Å or less.

9 . The display device of claim 1 or 5 , wherein a thickness of the reinforcement layer is less than a thickness of the barrier layer.