IPC-A-610 Test Questions and Correct Answers the Latest Update and Recommended Version
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Course
IPC-A-610
Institution
IPC-A-610
3 types of Conformal Coating: Acrylic Resin (AR)
This type of coating provides 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 q...
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IPC-A-610 Test Questions and Correct
Answers the Latest Update and
Recommended Version
3 types of Conformal Coating: Acrylic Resin (AR)
✓ This type of coating provides 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.
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 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
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.
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✓ Programmed spray system that moves the board on a CONVEYOR under an alternative
spray head that applies a conformal coating.
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.
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. Common for high volume processing. Masking may increase. This method
is good to coat both Front and Back of the board.
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 variable depending on operator proficiency and consistency.
This is the best for a small batch or a single board.
1. Solvent Removal
2. Peeling
3. Microblasting: using a concentrated mix of soft abrasive and compressed air to abrade the
coating.
4. Grinding/Scaping
✓ What are the Conformal Coating Removal Methods by IPC? (4)
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