Practice Test Geeks(CIS) Certified Immigration Specialist Practice Test
← All CIS Flashcard Decks

Conformal Coating & Encapsulation Flashcards

7 cards from real CIS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Conformal Coating & Encapsulation flashcards as text

  1. In IPC conformal coating designations, what does 'ER' stand for?

    Answer: Epoxy Resin

    ER designates Epoxy Resin per IPC-CC-830, the standard qualification specification for conformal coatings.

  2. Which conformal coating type is most difficult to rework once fully cured?

    Answer: Epoxy (ER)

    Epoxy (ER) coatings are thermoset and chemically cross-linked after curing, making them extremely resistant to solvents and very difficult to remove for rework.

  3. Which conformal coating type offers the widest operating temperature range and best high-temperature performance?

    Answer: Silicone (SR)

    Silicone (SR) coatings retain flexibility and protective properties from approximately -65°C to +200°C, outperforming all other coating types at temperature extremes.

  4. Which of the following is NOT a standard method for applying conformal coating to electronic assemblies?

    Answer: Vacuum plasma deposition

    Standard conformal coating application methods include brush, dip, spray, and selective coating; vacuum plasma deposition is not a recognized IPC application method for conformal coatings.

  5. Per IPC-A-610, conformal coating that exhibits delamination from the board surface is classified as which condition?

    Answer: Defect

    Delamination of conformal coating exposes the assembly to environmental attack and represents a failure of the protective function, making it a defect per IPC-A-610.

  6. What primary function does conformal coating serve on a completed electronic assembly?

    Answer: Protect against moisture, chemical attack, and environmental contaminants

    Conformal coating is applied as a thin protective film to shield the assembly from moisture, chemicals, dust, and other environmental stressors that could degrade performance or cause failure.

  7. Why do most commercial conformal coatings contain fluorescent UV additives?

    Answer: To allow visual verification of coating coverage using a UV black light

    UV fluorescent tracers cause the coating to glow visibly under ultraviolet light, enabling inspectors to quickly identify coated versus uncoated areas during quality control inspection.