LPI etching and plating ink
It's photoimageable etching and plating ink, excellent coating ability can be totally shown via various coating methods.
Photo-imageable Etching and Plating Resist Ink
It is a new kind of photoimageable etching and plating resist ink. Its excellent coating
ability can be totally shown via various coating methods. Sharp definition, high accuracy and very minor under cut make it extremely suitable for producing one side, double-sided , high precision multi-layer and flexible PCB boards. Its acid-resistant ink which also good for the boards such as stainless steel , iron and aluminous material. The special characteristic is can be for Sn plating without post-cure.
Example of operation process:
1. Ink mixing
Mixing(Shaking) well for 5-10 min.
Mechanical brushing or acid treatment.
3. Screen printing
a. Use nylon, polyester or stainless steel screen for printing
b. 100-250 mesh/inch.
c. Rubber/Polyurethane (PU) Squeege with the hardness of -65-75 .
d. Printing Angle 70-80
e. Film thickness: 8-16 um
First side 75±5 x 10 min
Second side 75±5 x 15 min
Both side cure at the same time 75±5 x 15 min
Energy required from UV rays:100-200mj/cm2
Photographic sensitivity :300-500nm
(Photosensitivity: 6-9 step)
By 1-1.2% sodium carbonate (Na2CO3) solution
Spraying pressure:2-3 kg/cm2
Time: 45-60 sec.
The coating could be stripped completely with 3-5% NaOH solution at 45-50;
Spraying pressure 2-3kg, 1-2 min