(6) Most Common Coating Defects and causes:
Air Bubbles, Pinholes, and Foam - ANS-Bubbles occur while pockets of air get trapped below a
conformal coating layer. Foam is an severe shape of bubbling, and occasionally bubbles burst
thru the coating, forming a pinhole.
Causes:
-coating is simply too viscous.
-The coating is too thick.
-software device not setup well.
(6) Most Common Coating Defects and causes:
Delamination - ANS-When coating has lifted up and far from the board. This hinders safety
because the vicinity below the coating is left exposed. (Ex:Ripping off greater coating after
demasking and pulling off an excessive amount of coating across the area.
Causes:
-too thick of coating
- coating now not adhering to preceding coating layer.
-infection of surface of the board.
(6) Most Common Coating Defects and reasons:
Dewetting - ANS-Coating will not calmly coat the floor to which its applied.
Causes: - choppy coating software.
- flawed aggregate of two- part material.
- Residue on coating surface.
- Surface tension and surface strength.
(6) Most Common Coating Defects and causes:
Capillary Flow - ANS-occurs while coating migrates from one region of a board to every other,
leaving in the back of an inconsistent, uneven finish at the surface.
Causes: -utility of an excessive amount of coating
- coating with low viscosity or excessive floor anxiety.
- low surface strength of factor being lined.
(6) Most Common Coating Defects and reasons:
Cracking and Ripples - ANS-Visual cracks and creases on components.
Causes: -coating is simply too thick
- thermal shock
- coating cured too quick
(6) Most Common Coating Defects and reasons:
Orange Peel - ANS-Coating appears stupid, similar to the pores and skin of a fruit or basketball.
Causes:
-substrate is just too hot.
-unsuitable aggregate of solvent and coating ratio.
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