1. 3 types of Conformal Coating: Acrylic Resin (AR): This type of coating pro-
vides FAIR elasticity and general protection. It has high dielectric strength, and
fair moisture and abrasion resistance. This coating is different from others because
its facility for removal. This type are EASILY and quickly removed by a variety of
solvents, often without requiring agitation. This makes rework and field repair very
practical and economical. This type doesn't protect against solvents and solvent
vapors.
2. 3 types of Conformal Coating: Silicone Resin (SR): This type of coating
provides EXCELLENT protection in a very wide temperature range. This coating
provides good chemical resistance, moisture, and salt spray resistance, and is very
flexible. This type is NOT abrasion resistant because of its rubbery nature, but
this property does make it resilient against vibrational stresses. Commonly used in
high-humidity environments. Removal can be CHALLENGING. requiring specialized
solvents, long soak time, and agitation from a brush.
3. 3 types of Conformal Coating: Urethane (Polyurethane) Resin (UR): This type
of coating is known for its EXCELLENT moisture and chemical resistance. It is also
very abrasion resistant. Combining those factors with its SOLVENT RESISTANCE
results in a conformal coating that is very difficult to remove. Like SR, full removal
generally requires special solvents, long soak time, and agitation with a brush. This
is common in aerospace application. ex: Conathane
4. 5 Coating application methods: Manual Spraying: Aerosol can or handheld
spray gun. Time consuming method of coating for a small quantity of boards. Lots of
masking beforehand. Quality and consistency of outcome are operator- dependent.
5. 5 Coating application methods: Automated spraying: Programmed spray sys-
tem that moves the board on a CONVEYOR under an alternative spray head that
applies a conformal coating.
6. 5 Coating application methods: Selective coating: An automated conformal
coating process that uses PROGRAMMABLE ROBOTIC SPRAY NOZZLES to apply
the coating to very specific areas on the circuit board. May eliminate the need for
masking using the program. The UV lamp in machine helps cure the coating right
after it is sprayed.
1/7
, 7. 5 Coating application methods: Dipping: The circuit board is first immersed,
Then withdrawn from the conformal coating solution. Immersion speed, withdrawn
speed, Immersion time, and Viscosity determine the resulting film formation. Com-
mon for high volume processing. Masking may increase. This method is good to coat
both Front and Back of the board.
8. 5 Coating application methods: Brushing: Simple application method used
mainly in repair and rework. Conformal Coating is applied with a BRUSH to specific
areas on the board. Low-cost method but requires lots of manual labor and is highly
2/7
vides FAIR elasticity and general protection. It has high dielectric strength, and
fair moisture and abrasion resistance. This coating is different from others because
its facility for removal. This type are EASILY and quickly removed by a variety of
solvents, often without requiring agitation. This makes rework and field repair very
practical and economical. This type doesn't protect against solvents and solvent
vapors.
2. 3 types of Conformal Coating: Silicone Resin (SR): This type of coating
provides EXCELLENT protection in a very wide temperature range. This coating
provides good chemical resistance, moisture, and salt spray resistance, and is very
flexible. This type is NOT abrasion resistant because of its rubbery nature, but
this property does make it resilient against vibrational stresses. Commonly used in
high-humidity environments. Removal can be CHALLENGING. requiring specialized
solvents, long soak time, and agitation from a brush.
3. 3 types of Conformal Coating: Urethane (Polyurethane) Resin (UR): This type
of coating is known for its EXCELLENT moisture and chemical resistance. It is also
very abrasion resistant. Combining those factors with its SOLVENT RESISTANCE
results in a conformal coating that is very difficult to remove. Like SR, full removal
generally requires special solvents, long soak time, and agitation with a brush. This
is common in aerospace application. ex: Conathane
4. 5 Coating application methods: Manual Spraying: Aerosol can or handheld
spray gun. Time consuming method of coating for a small quantity of boards. Lots of
masking beforehand. Quality and consistency of outcome are operator- dependent.
5. 5 Coating application methods: Automated spraying: Programmed spray sys-
tem that moves the board on a CONVEYOR under an alternative spray head that
applies a conformal coating.
6. 5 Coating application methods: Selective coating: An automated conformal
coating process that uses PROGRAMMABLE ROBOTIC SPRAY NOZZLES to apply
the coating to very specific areas on the circuit board. May eliminate the need for
masking using the program. The UV lamp in machine helps cure the coating right
after it is sprayed.
1/7
, 7. 5 Coating application methods: Dipping: The circuit board is first immersed,
Then withdrawn from the conformal coating solution. Immersion speed, withdrawn
speed, Immersion time, and Viscosity determine the resulting film formation. Com-
mon for high volume processing. Masking may increase. This method is good to coat
both Front and Back of the board.
8. 5 Coating application methods: Brushing: Simple application method used
mainly in repair and rework. Conformal Coating is applied with a BRUSH to specific
areas on the board. Low-cost method but requires lots of manual labor and is highly
2/7
