USR-3000 YR-310

1. FEATURES

USR-3000(YR-310)is ultraviolet cured type solder resist.
-Excellent adhesion.
-Excellent printing performance.

2. GENERAL SPECIFICATION

Main Agent YR-310 REMARK
Color Green  
Viscosity  75±5 Ps  
Specific Gravity 1.40 ~ 1.60  
Pigment 0.8 % Compounding Ratio
Curability Good  
Pencil Hardness 4H Pencil Method
Adhesion  100 / 100 Tape Method
Solder Shock  3 Times Dipping at 260°C for 10sec
Acid Resistance No Affect H2SO4
Alkali Resistance No Affect NaOH
Insulation Resistance 1.OE 12 Ohm Initial Reading
  1.OE 11 Ohm  96 Hours, Moisture Absorption
Shelf Life  6 Months  Less than 25°C (In cool & dark)

*:Stored in cool and dark place at less than 25·C. 

3. PROCESS

A)   Surface Preparation

Before printing such contamination like as Oil,Fat,Oxidation and other foreign matters 
remaining on the board surface must be removed completely.
Because, these contamination shall cause a deterioration of adhesion property, after cured.
Careful pre-treatment for the board surface is necessary like follow:
-Chemical: An acid solution, such as "METALEX"(Nihon Oil,Fat Co.)or the equivalent
-Mechanical: Polishing with Brush Roller,"BRUSHLON"or the equivalent and water spray cleaning.
-Drying : Heat & Hot air blower.

B) Environmental Working Condition

-Air conditioning.
-No direct sun-shines.
-Yellow lamps.

C)   Screen Printing
        To use a screen material, polyester monofilament fabricated in a range of 250-300 mesh-count/inch, is recommendable.

D) Curing

      
Conveyor speed (meter per 1 minute) will be varied, case by case, according to such condition as;
       The thickness of USR-300 YR-310 Coating, whether Thick or Thin, in order to better curing performance

Type of U.V. Rays

Power

Number of lamps Conveyor Speec
High Pressure
Mercury Vapor Lamp
80W/cm 3 Lamps 4-6 m/min
120W/cm 3 Lamps 5-7m/min
Matal Halide Lamp 80W/cm 3 Lamps 5-6m/min
120W/cm 3 Lamps 6-8m/min

E)    Screen wash-up and Cleaning

      
Wash up with chemical such as Cellosolve Acetate, Methyl Cellosolve, Dipropylene
       Glycol monomethyl Ether or Esterfic solvent.

4. SHELF LIFE

6 months from date of manufacture:
Date of manufacture is appeared as product.
Lot number marked on each labels; M000114=Jan. 14 2000
First 6 digits shows year, month and day.

5. STORAGE CONDITION

Store in cool and dark condition at less than 25·C.