Sealing substrate, method of fabricating the same, display device, and electronic instrument

1. A sealing member comprising:

a first substrate having a first surface and a second surface that is the opposite surface of the first surface, the first substrate having a hollow portion formed in the first surface, a plate portion forming a bottom surface of the hollow portion and a frame portion forming an inner wall surface of the hollow portion; and

a second substrate attached to the second surface of the first substrate,

wherein the second substrate is formed of a material of a specific gravity lower than a specific gravity of the first substrate, and the plate portion is thinner than the frame portion.

2. The sealing member according to claim 1 ,

wherein the first substrate is formed of an inorganic oxide.

3. The sealing member according to claim 2 ,

wherein the second substrate is formed of resin.

4. The sealing member according to claim 3 ,

wherein the second substrate is a single layer.

5. The sealing member according to claim 3 ,

wherein the second substrate is formed of a material including a resin selected from a group of polyolefine, polyester, an ethylene vinyl acetate copolymer, an ethylene methyl methacrylate copolymer, and an ionomer resin.

6. The sealing member according to claim 3 ,

wherein the second substrate comprises a plurality of layers.

7. The sealing member according to claim 6 ,

wherein the second substrate comprises a base material layer and a layer for bonding or adhesion.

8. The sealing member according to claim 7 , wherein:

the base layer is formed of a material including a resin selected from a group of polyethylene terephthalate, a polyamide, polyolefine, a polycarbonate, a polyimide, polyethel sulfonic acid, an epoxy compound, polystyrene, and a cellulose resin; and

the layer for bonding or adhesion is formed of a material including a resin selected from a group of silicone, an acrylic resin, a metacrylic resin, an epoxy compound, polyurethane, an ethylene vinyl acetate copolymer, and styrene-butadiene rubber.

9. The sealing member according to claim 7 ,

wherein the second substrate further comprises a buffer layer.

10. The sealing member according to claim 9 ,

wherein the buffer layer is formed of a material including a resin selected from a group of styrene-butadiene rubber, silicon rubber, latex, and polyurethane.

11. The sealing member according to claim 2 ,

wherein the first substrate is formed of an inorganic oxide selected from a group of glass, quartz, and ceramic.

12. The sealing member according to claim 11 ,

wherein the first substrate is formed of a glass selected from a group of soda-lime glass, borosilicate glass, aluminosilicate glass, and silicate glass.

13. The sealing member according to claim 1 , wherein:

the thickness of the first substrate is within the range of greater than or equal to 0.1 mm but less than or equal to 1.1 mm;

the height of the inner wall surface of the hollow portion is within the range of greater than or equal to 0.05 mm but less than or equal to 0.8 mm; and

the thickness of the plate portion is within the range of greater than or equal to 0.01 mm but less than or equal to 0.9 mm.

14. The sealing member according to claim 13 ,

wherein the thickness of the second substrate is within the range of greater than or equal to 0.01 mm but less than or equal to 0.4 mm.

15. The sealing member according to claim 14 ,

wherein the total thickness of the first and second substrates is within the range of greater than or equal to 0.1 mm but less than or equal to 1.5 mm.

16. A display device comprising:

the sealing member as defined in claim 1 ; and

a display section encapsulated with the sealing member.

17. An electronic instrument comprising the display device as defined in claim 16 .