Support member for display device, display device comprising thereof, and method for manufacturing thereof

A display device comprising:

• a display panel including a first non-folding area, a second non-folding area, and a folding area between the first non-folding area and the second non-folding area;
• and
• a support member disposed under the display panel and including:
• a first support layer having a first surface facing the display panel and a second surface opposite to the first surface;
• and
• a second support layer directly contacting the second surface of the first support layer, wherein the second support layer includes a material different from a material of the first support layer,
• wherein the second support layer includes a stretchable portion, and
• wherein the stretchable portion overlaps the folding area, and at least one opening is defined in the stretchable portion.

A method of manufacturing a support member for a display device, the method comprising:

• directly disposing a second support layer including a material different from a material of a first support layer on the first support layer, the first support layer including a first area, a second area, and a third area between the first area and the second area;
• bonding the first support layer and the second support layer to each other via thermocompression bonding;
• forming a photoresist layer on the second support layer, wherein the photoresist layer overlaps the third area and includes a pattern portion, in which at least one opening is defined;
• forming a stretchable portion in the second support layer by selectively etching the second support layer using the photoresist layer as an etching mask, wherein the stretchable portion overlaps the third area and at least one opening is formed in the stretchable portion;
• and
• removing the photoresist layer.