TAIYO IJR-4000 FW100 FLEXIBLE INKJET LEGEND INK
Inkjet Application; Fast UV Set Cure
High Hardness after Thermal Cure
Halogen-free; Bright White Color
Excellent Adhesion to Semi- and Fully-Cured Solder Mask Surfaces
RoHS & REACH Compliant
High Opacity and Non-Yellowing
Compatible with Lead-Free Processing
P ROCESSING P ARAMETERS FOR IJR-4000FW100
IJR-4000 FW100 is a single component UV curable Inkjet Marking ink for Flexible Printed Circuit Boards. It is applied with a Piezo drop-on-demand (DOD) print head. IJR-4000 FW100 is fast curing and can be applied to both Semi and Fully cured solder mask.  Environmental:All Taiyo America products comply with Directive 2002/95/EC of the European Parliament and of the Council of 27 January 2003 on the Restriction of the use of certain Hazardous Substances (RoHS) in electrical and electronic equipment. IJR-4000 FW100 contains no Substances of Very High Concern (SVHC) according to the latest list of substances from the European Chemicals Agency (ECHA) as of October 2010. See the Taiyo America website (www.taiyo-america) for more specific documentation.  This is a “halogen-free” material.
IJR-4000FW100S PECIFICATIONS:        IJR-4000 FW100
Viscosity:  < 15 cps (cone-plate type, 5 rpm, 35-40°C)
Color:    White
Specific Gravity:        1.15
Surface Tension:    22-24 mN/m at 22°C
Shelf Life: 3 Months provided the customer has, at all
times, stored the ink in a dark place at a
temperature at 10-20°C (50-68°F)
M IXING/D ISPENSING: IJR-4000 FW100 is supplied in a 1 liter bottle containing 1 kg of ink. The ink should be gently stirred well prior to use to make it homogeneous.
Do not shake the container as this will introduce bubbles into the ink and
will cause printing defects.  No dilution is necessary or recommended.
P RE-C LEANING:  Prior to legend ink application, the surface of the panel needs to be free of contaminants. Our recommendation is to apply the legend ink on the
circuit board after developing the solder mask. If the legend ink is
applied after solder mask final cure, the surface needs to be cleaned
chemically to make sure there are no contaminants on the surface. It is
not a good idea to mechanically scrub the solder mask prior to applying
the legend ink.
P ROCESSING P ARAMETERS FOR IJR-4000FW100
I NKJET A PPLICATION: Method: Inkjet printers
∙Surface: Semi-Cured or Fully Cured Solder Mask
NOTE:  Adhesion is affected by the degree of cure of the solder mask.
Adhesion is best when the ink is applied to semi-cured solder
mask (after development,) and co-cured with the solder mask.
Adhesion is also dependent upon the exposure energy and level
of solder mask cure.  Best adhesion is obtained with lower
exposure energy (< 600 mJ/cm2).  Avoid any UV bump cure
before ink application.
∙Typical coating thickness after curing is 10-15 µm.  Thicker coatings
may cause reduced adhesion, hardness and chemical resistance.
F INAL C URE:subjection
∙Thermal Cure (semi-cure solder mask): 150°C for 55-60 minutes
∙Thermal Cure (fully cure solder mask):  150°C for 30-60 minutes
NOTE: When applying this product to semi-cured solder mask the
legend ink and solder mask should be co-cured at the same
time.
For Process Optimization please contact your local Taiyo Representative
Taiyo warrants its products to be free from defects in materials and workmanship for the specified warranty period; IJR-4000 FW100 Warranty period is 3 Months provided the customer has, at all times, stored the ink in a dark place at a temperature of 10°C (50°F). TAIYO accepts no responsibility or liability for damages, whether direct, indirect, or consequential, resulting from failure in the performance of its products. If a TAIYO product is found to be defective in material or workmanship, its liability is limited to the purchase price of the product found to be defective. TAIYO MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND MAKES NO WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR ANY PARTICULAR PURPOSE. TAIYO'S obligation under this warranty shall not include any transportation charges or costs of installation or any liability for direct, indirect, or consequential damages or delay. If requested by TAIYO, products for which a warranty claim is made are to be returned transportation prepaid to TAIYO'S factory. Any improper use or any alteration of TAIYO'S product by the customer, as in TAIYO'S judgment affects the product materially and adversely, shall void this limited warranty.
F INAL P ROPERTIES FOR IJR-4000FW100
Test Test Method / Requirement Results Pencil Hardness Internal Test ≥ 3H Adhesion after Cure – Rigid Boards Cross Cut 10 X 10 Tape Test Pass Solder Heat Resistance Solder float test; No-clean Flux; 260 ± 5°C / 10 sec,3 cycles Pass Appearance/Color Visual Inspection Pass Solvent Resistance PGM-Ac, 20°C / 30 min, Tape Test Pass
Acid & Alkaline Resistance 10 vol.% H2SO4, 20°C / 30 min
10 wt.% NaOH 20°C / 30 min
Pass
Pass
Reliability
Test Test Method / Requirement Results Dielectric Strength Raise DC 500V/sec; 500V minimum Pass (1.3 KV) RoHS Approved 2005/618/EC(IEC62321 Edition 1.0:2008) Pass Halogen-Free JPCA-ES01-2003 Pass
Insulation Resistance
1min in DC100V
1min in DC100V after HASL
Pass – 5.2X1012Ω
Pass – 4.8X1011Ω
Moisture and Insulation Resistance    1min in DC100V after 50°C x 24 hrs
1min in DC100V 25-65°C, 85%RH, DC50V for 7days
Pass – 3.8X1012Ω
Pass – 1.4X1011Ω
Electromigration 85°C, 90%RH, DC10V for 165 hrs
Evaluated by magnification
Pass
Hydrolytic Stability
97 ± 2°C, 90-98%RH for 28 days
Evaluated by macrography and ink surface rub
Pass
Thermal Shock -65°C for 15 min, to 125°C for 15 min, Transition is less than
2 min, 100 cycles
Pass
CID A-A-56032D PERFORMANCE REQUIREMENTS
Test A-A-56032D
Paragraph
Test Method / Requirement Results
Adhesion    3.7 Cured ink impressions shall not deteriorate
when subjected to trichloroethylene vapors
at 86.5o to 88o C for a period of not less than
three minutes and not greater than six
minutes.
Pass
Electrical Resistance (Type II) Before Conditioning
After Conditioning 3.8
1 x 101
2 ohms minimum
1 x 1010 ohms minimum
5.2 x 1012
1.4  x 1011
Abrasion Resistance    3.9.1 Cured ink impressions shall retain their
legibility after subjection to 300 to 303
revolutions of the CS-10 abrasive wheel
while under a minimum load of 2.2 pounds
in accordance with ASTM D4060.
Pass
Chemical Resistance    3.9.2 Cured ink impressions shall retain their
legibility when immersed for a minimum of
30 minutes in water, denatured ethyl
alcohol, and non-ODC (Ozone Depleting
Chemical) cleaning solvent.
Pass
Chemical Resistance (Type II)    3.9.2.1 In addition to 3.9.2, Type II cured ink shall
be resistant to hot solder and solder flux.
Pass Salt Spray Resistance    3.9.3 Cured ink impressions shall not deteriorate
when exposed to a 5 percent salt spray
solution at 33o to 37o C for a period of not
less than 48 hours.
Pass
Light Fastness    3.9.4 Cured ink impressions shall not fade and
shall remain legible when tested by a light
fastness test.  To determine conformance,
one half of the surface of the test specimens
shall be covered to obscure light, and the
remaining half shall be exposed for 24 hours
to the light source outlined in ASTM G153
using daylight filter and exposure cycle 7 or
ASTM G155 using window glass filter and
exposure cycle 4.
Pass
Stability    3.9.5 Cured ink impressions shall not fade, chip,
peel, or flow and shall remain legible when
exposed to a temperature of 118o to +/- 3o C
for a period of not less than 24 hours.
Pass
Fungus Resistance    3.9.6 Cured ink impressions shall not support
fungi growth when inspected.
Pass