PSR Ink for LED

● Applicable products

● Applications

PSR, IR and spray type paints of high reflectivity to enhance optical efficiency of LED

● Features

World-top reflectivity
Heat emission effects
Stability at high temperature

● Specifications (defined by customer)

Reflection ≥91% @450 nm (thickness 24 um)
Comparison of reflectivity (PSR type paint)

Wavelength band(nm)	Referencd	Deviceon	Company A (foreign company)	Company B (foreign company)	Company C (foreign company)
도막두께		21um	21um	21um	21um
400	100.46	44.89	42.14	37.03	40.25
410	99.92	70.41	65.10	60.80	62.48
420	99.97	85.34	78.63	79.52	80.48
430	99.97	88.88	84.01	85.21	86.28
440	99.96	90.71	86.57	86.36	85.98
450	99.94	91.54	87.46	86.61	86.55
460	100.02	91.83	87.51	86.70	40.25
470	99.96	90.94	87.40	86.72	86.87
480	99.95	90.92	87.07	86.61	85.45
490	100	90.91	86.77	86.43	85.46
500	100	90.78	86.41	86.21	86.42
510	100.05	90.52	86.08	85.92	85.99
520	99.96	90.30	85.59	85.55	85.57
530	99.98	90.04	85.16	85.17	85.19

● Specification sheet of PRS ink for LED module

Specification		SPR-8000 White
Color		White
Viscosity		180±30Ps [Cone&Plate Type Viscometer, 6rpm/25℃]
Blending ratio	Single-solution type	Sufficiently agitating with agitator for 30 – 40 minutes
Storage	20℃ after opening	15 days (storing in cans at dark place)
	10℃ - 20℃ before opening	6 months (storing at dark place)
Pre-curing (primary curing)		80℃ × 30 min
Exposed light volume		≥480±50mJ/㎠
Developing agent	( 1Wt%Na2CO3,30℃ )	60 ~ 90 seconds
	( 1Wt% K2CO3, 30℃ )	30 ~ 40 seconds
Full curing		150℃ × 40 min
Coating thickness (after curing)		20~25㎛
Pencil hardness		≥6H
Adhesiveness		Tape Test after Cross Cut 10x 10
Melting solder resistance		260℃×30sec, 3 times
Solvent resistance	PGM -Ac , 20℃	≥ 30 min
Chemical resistance	10Vol% H2SO4, 20℃	≥ 30 min
	5wt% NaOH, 20℃	≥ 30 min
Insulation resistance	Initial value	1x1013Ω
Insulation resistance upon humidifying	50℃ 90%RH 24hr	2x1012Ω
Features		※ Realizing the highest reflectivity in the industry