Method of manufacturing adhesive member, method of manufacturing display device including the same, and display device manufactured by the method of manufacturing display device

1. A method of manufacturing an adhesive member, comprising:

providing, on a substrate, a resin composition having a viscosity of about 5 cP to about 50 cP (exclusive of 50), as measured according to a JISK2283 method, at about 25° C.;

exposing the resin composition to a first light to form a preliminary adhesive member having a curing rate of about 80% to about 98% (exclusive of 80 and 98); and

exposing the preliminary adhesive member to a second light having a light integral that is greater than a light integral of the first light to form an adhesive member,

wherein the preliminary adhesive member has a loss tangent (tan δ) of about 0.2 to about 0.6 (exclusive of 0.6), and the adhesive member has a glass transition temperature of about −70° C. to about −30° C. (exclusive of −30).

2. The method of claim 1 , wherein the resin composition is provided by an inkjet printing method or a dispensing method.

3. The method of claim 1 , wherein the resin composition includes at least one (meth)acrylate monomer containing a (meth)acryloyl group, at least one urethane (meth)acrylate oligomer, and at least one photoinitiator.

4. The method of claim 3 , wherein the curing rate of the preliminary adhesive member satisfies Equation 1 below:

Z 1 =[( X 1 −Y 1 )/ X 1 ]×100%  [Equation 1]

wherein, in Equation 1 above,

X 1 is an absorption amount of the (meth)acryloyl group measured by Fourier-transform infrared spectroscopy (FT-IR) in the resin composition, Y 1 is an absorption amount of the (meth)acryloyl group as measured by FT-IR in the preliminary adhesive member, and Z 1 is the curing rate of the preliminary adhesive member.

5. The method of claim 3 , wherein a weight average molecular weight of the (meth)acrylate monomer is about 100 to about 500.

6. The method of claim 3 , wherein a weight average molecular weight of the urethane (meth)acrylate oligomer is about 10,000 to about 40,000 (exclusive of 40,000).

7. The method of claim 3 , wherein the urethane (meth)acrylate oligomer includes a plurality of acrylic groups.

8. The method of claim 3 , wherein the photoinitiator includes a radical polymerization initiator.

9. The method of claim 1 , wherein a light integral of the first light is about 200 mJ/cm 2 to about 1,000 mJ/cm 2 , and a light integral of the second light is about 3,500 mJ/cm 2 to about 4,500 mJ/cm 2 .

10. The method of claim 1 , wherein the adhesive member has a 180 degree peel strength of about 800 gf/25 mm or more with respect to a polymer substrate.

11. The method of claim 1 , wherein the adhesive member has a curing rate of greater than 90%.

12. A method of manufacturing a display device comprising:

providing, on a substrate, a resin composition having a viscosity of about 5 cP to about 50 cP (exclusive of 50), as measured according to a JISK2283 method, at about 25° C.;

exposing the resin composition to a first light to form a preliminary adhesive member having a curing rate of about 80% to about 98% (exclusive of 80 and 98);

providing a protective member on the preliminary adhesive member; and

exposing the preliminary adhesive member to a second light having a light integral that is greater than that of the first light to form an adhesive member,

wherein the preliminary adhesive member has a loss tangent (tan δ) of about 0.2 to about 0.6 (exclusive of 0.6), and the adhesive member has a glass transition temperature of about −70° C. to about −30° C. (exclusive of −30).

13. The method of claim 12 , wherein the second light passes through the protective member and exposes the preliminary adhesive member.

14. The method of claim 12 , wherein the resin composition includes at least one (meth)acrylate monomer, at least one urethane (meth)acrylate oligomer, and at least one photoinitiator.