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LIQUID PHOTOIMAGEABLE SOLDER MASK

LK-ZF600 is a two-component, gloss Green, Orange-red, alkaline developable LPI solder mask products for flood screen printing. LK-ZF600 has been specifically designed for FPC boards and is user friendly with wide processing latitude.

Product Detail

product detail

Feature

It has very good resistance to heat, ENIG, and has excellent insulation, halogen-free. It complies with the 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.

Product Specification

LK-ZF600 Serie Components	LK-ZF600	CA LK-HD600
Mixing Ratio	75 parts	25 parts
Color	Green, Orange-red	White
	Mixed Properties
	Viscosity 170±20dPa.s

PROCESSING PARAMETERS

MIXING

LK-ZF600 should be used in a clean environment with a temperature of 20-25°C and a humidity of 50-60%RH, and use a yellow light (UV filtering) for lighting, avoid using white electric lights or daylight. When the product temperature reaches room temperature, open the can, mix with a ratio by weight of 75 parts LK-ZF600 and 25 parts CA LK-HD600 and stir thoroughly.

Pot life after mixing is 24 hours when stored in a dark place at ≤ 25°C (77°F).

FPC PRE-CLEANING

Pickling→ Washing→ Sandblasting→ Washing → Drying

SCREEN PRINTING

Screen Mesh: 100-130

Screen Mesh Angle: 45°Bias

Stand for ten to thirty minutes after printing

The thickness of the mask should be about 20μm (after curing), if it is too thick, the drying time will be longer.

TACK DRY

(1) Avoid direct sunlight and fire sources. For long term storage, please keep the room temperature at below 15 ℃ and avoid sunlight. The unused L and K film should be put back into the original packaging bag(L film in black poly bag, K film in blue poly bag) and store in the packaging box.
(2) Don’t contact with the following items: Carbonless copying paper; water, oil, solvent and other chemicals ; Plasticizers and plastic products which contain plasticizers; Rubber and eraser Oily handwriting
(3) The K film after indicating color should be put into the paper bag. A few K films store together, make sure the color surface does not touch each other. Better to separate by white paper.

(4) The color film samples will fade to a certain extent with the extension of time. suggest to scan the image to store.

EXPOSURE

Energy:
For Green
600mJ / cm2 minimum (under phototool)
For Orange-red
500mJ / cm2 minimum (under phototool)
The exposure energy depends on the type of substrate and the thickness of the mask, and the appropriate exposure amount can be selected according to the size of the undercut.
Stand for ten to thirty minutes after exposure

DEVELOPMENT

Solution: 1% by wt. Sodium Carbonate
pH: 10.6 minimum , to
Temperature: 29 - 31°C
Spray Pressure: 0.15-0.2MPa
Dwell Time in developing chamber: 40 - 70 seconds
Water rinse is needed to remove developer solution & dry
water temperature below 30°C
Water pressure: 0.1-0.15MPa
Rinsing time: 30-50 seconds

FINAL CURE

Temperature: 150°C in conveyorized oven

Time at Temperature:60minutes