터치 스크린 패널용 광학 접착소재 - cheric.org

1 26 4 2015 8 313 2009 ( )2009- ( ) 1987 ( )1989 ( )1995 The University of Tokyo ( )1995-1996 Virginia Polytechinic Institute & State Univ., Center for Adhesive & Sealant Science 1996-1999 State Univ. of New York at Stony Brook , NSF-Center for Polymer at Engineered Interface 2013 State Univ. of New York at Stony Brook Adjunct Professor1996-1998 Brookheven National Lab. 1999- Optical Bonding Materials for Touch Screen Panel | Cho-Hee Park Hyun-Joong KimLab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, College of Agriculture and Life Sciences, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-921, Korea,E-mail: ( )1.

2 , (touch screen panel, TSP) . 2007 (iPhone) (smart phone) PC(tablet PC) , PC(all-in-one PC), TV, , , , , TSP ( 1).1 TSP 2 2, TSP .TSP (cover window) (display module) , 3a (air gap) 3b (full lamination) ( (direct bonding) ) . (layer) optically clear adhesive(OCA) optically clear resin(OCR liquid optically clear adhesive, LOCA) | 314 Polymer Science and Technology Vol.

3 26, No. 4, August 2015 1. TSP .1 2..2 3. (a) (air gap), (b) (full lamination) .3(a)(b) 4. (a) (b) .3 5. OCA/OCR .5 . optically clear 90% , . (acryl) , (silicone) , (urethane) UV(ultraviolet) 4. , (soft segment) (hard segment) .. (backlight unit) . ( 4).3 (gap filling).

4 5 TSP .5 OCA OCR 6 OCR . 7 OCA 8 OCR . 26 4 2015 8 315 7..8 8. OCA .9 6. TSP OCA OCR .5 9. / ( : (glass)/ / (glass), 85 C, 85 %RH 120 ).8 OCR (over flow) . (flexible display) , OCR OCA (hybrid) OCA .6,72. OCA OCR . OCA OCR.

5 ( )Optically clear , . TSP . 9 .8 (cloud point-resistant adhesives and laminates) , , (hydrophilic segment) .10 (haze) , 10 | 316 Polymer Science and Technology Vol. 26, No. 4, August 2015 10..10 11. / ITO .11 1. TSP ( : nm)12 12. 2-phenoxyehtyl acrylate .13 (continuous adhesive phase).

6 , . TSP , TSP . , (acryl) (site) (acrylic acid) (carboxyl group) . , TSP . indium tin oxide(ITO) TSP .11 11 , ITO . N-vinyl caprolactam acrylamide . 1 , PET . 12 TSP , TSP.

7 TSP . , 26 4 2015 8 317 2. (biphenyl group) 14 Example formulaMonomer (g)Solvent (g)Initiator (g)Refractive index (RI)IOAAABPAIOA/AA/BPA 78/2/2039110 Ethyl 58/2/4029120 Ethyl 38/2/6019130 Ethyl 18/2/809140 Ethyl 13. UV .13 14. (zirconium carboxyethylacrylate, ZrCEA) (a) (methyl aziridine derivatives) (b) .15 . (benzene ring) 13, 12 . , 2-phenyl ethyl acrylate . UV , ( 13). (biphenyl group) 14, 2 (biphenyl group).

8 (zirconium carboxyethyl acrylate)15 (TiO2)16, (hafnium carboxyethyl acrylate)17 (blending) . 14 (zirconium) , 15 (TiO2) . (hafnium) 16 . (TiO2) (filler) ( 17). (Blister Resistance) (flexible) | 318 Polymer Science and Technology Vol. 26, No. 4, August 2015 18. (flexible display) .19 19. (blister resistance) ( : 80 C, 240 ).8 15. (TiO2) .16 16. (hafnium carboxyethyl acrylate).

9 17 17. (TiO2) (TIO2) .18 polymethyl methacrylate (PMMA), polycarbonate(PC) ( 18).19 19 .8,20 Tg .21 , (blister) , X-ray photoelectron spectroscopy (XPS) (blending) (tackifier) . (Reworkability)OCA (mismatch), (misalignment) . (display module) OCA , OCA.

10 20 (Nitto Denko) OCA , 20a , 20b OCA .22 (hydroxyl) (carboxyl) , .23 26 4 2015 8 319 20. (glass) OCA : (a) , (b) .22 21. UV .7 22. UV .6 23. (black matrix) OCR UV .6 24..6 25. 60 C . (Black Matrix) TSP OCR , UV OCR (bezel) UV . OCA , OCR UV.