SMD IC Package and Soldering
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Questions and Answers

What is the coating type that is mentioned alongside shellac?

  • Thermal soak coating
  • Polymer film coating
  • PVC coating (correct)
  • Enamel varnish

    • Which zone comes after the preheat zone in the reflow soldering process?

  • Preheat zone
  • Cooling zone
  • Reflow zone (correct)
  • Thermal soak zone

    • What is the last zone in the reflow soldering process?

  • Cooling zone (correct)
  • Preheat zone
  • Thermal soak zone
  • Reflow zone

    • Which coating is mentioned alongside enamel varnish?

    <p>Shellac</p> Signup and view all the answers

    What is the first stage in the reflow soldering process?

    <p>Preheat zone</p> Signup and view all the answers

    What is the purpose of using a Bench top Ioniser?

    <p>To control ESD in the work environment</p> Signup and view all the answers

    What comes after the reflow zone in the reflow soldering process?

    <p>Cooling zone</p> Signup and view all the answers

    Which coating is mentioned alongside polymer film coating?

    <p>Enamel varnish</p> Signup and view all the answers

    What does PGA stand for in SMD IC package?

    <p>Package Grid Array</p> Signup and view all the answers

    What is the term for melting a little solder on the tip of the iron?

    <p>Tinning</p> Signup and view all the answers

    How many stages are there in the reflow soldering process?

    <p>4</p> Signup and view all the answers

    What is the name of the defect caused due to an ESD event?

    <p>ESD damage</p> Signup and view all the answers

    What is the purpose of controlling ESD in the work environment?

    <p>To prevent electrostatic discharge</p> Signup and view all the answers

    What type of hot air pencil tip is used in SMD soldering?

    <p>Angled type</p> Signup and view all the answers

    What is the benefit of using a Bench top Ioniser in the work environment?

    <p>It controls moisture and ESD in the work environment</p> Signup and view all the answers

    What is the range of temperature setting on soldering work station for soldering SMD ICs?

    <p>250°C to 280°C</p> Signup and view all the answers

    How does the desoldering braid remove the molten solder from the joint on the PCB?

    <p>By capillary action</p> Signup and view all the answers

    What is the term for changing the tip of the iron in soldering?

    <p>Changing the tip of the iron</p> Signup and view all the answers

    What is the result of an ESD event?

    <p>Damage to electronic components</p> Signup and view all the answers

    What is the main purpose of using a hot air pencil in SMD soldering?

    <p>To heat the joint</p> Signup and view all the answers

    What is the primary function of a desoldering braid?

    <p>To remove excess solder</p> Signup and view all the answers

    What is the purpose of ESD control in the work environment?

    <p>To prevent electrostatic discharge</p> Signup and view all the answers

    What is the advantage of using SMD ICs?

    <p>They occupy less space</p> Signup and view all the answers

    What is the primary concern when handling SMD ICs?

    <p>They are sensitive to static electricity</p> Signup and view all the answers

    Which relay is used for the time delay purpose?

    <p>Impulse relay</p> Signup and view all the answers

    Which relay operates with very low power?

    <p>Reed relay</p> Signup and view all the answers

    What is the current rating of a cartridge fuse with a brown colour code?

    <p>2A</p> Signup and view all the answers

    What is the primary function of an impulse relay?

    <p>To provide time delay</p> Signup and view all the answers

    What type of relay is sensitive to temperature changes?

    <p>Thermal relay</p> Signup and view all the answers

    Which type of relay is commonly used in electronic circuits?

    <p>Reed relay</p> Signup and view all the answers

    What is the primary characteristic of a reed relay?

    <p>Low power operation</p> Signup and view all the answers

    What is the main application of thermal relays?

    <p>Overheat protection</p> Signup and view all the answers

    What happens to components when the ramp-up rate exceeds the maximum slope in the heat zone of reflow soldering?

    <p>They get burnt</p> Signup and view all the answers

    What is the primary consequence of a ramp-up rate that surpasses the maximum slope in the heat zone of reflow?

    <p>Burnt or cracked components</p> Signup and view all the answers

    What happens to the components when the ramp-up rate is within the maximum slope in the heat zone of reflow?

    <p>No change occurs</p> Signup and view all the answers

    What is the purpose of controlling the ramp-up rate in the heat zone of reflow soldering?

    <p>To reduce the risk of component damage</p> Signup and view all the answers

    What is the consequence of exceeding the maximum slope in the heat zone of reflow soldering on component reliability?

    <p>It reduces component reliability</p> Signup and view all the answers

    What is the effect of a rapid ramp-up rate on components in the heat zone of reflow?

    <p>They are more likely to get burnt or cracked</p> Signup and view all the answers

    What is the outcome of a slow ramp-up rate in the heat zone of reflow soldering?

    <p>Components are less likely to get burnt or cracked</p> Signup and view all the answers

    What is the significance of controlling the ramp-up rate in the heat zone of reflow soldering?

    <p>It reduces the risk of component damage</p> Signup and view all the answers

    Study Notes

    SMD IC Package

    • Package Grid Array (PGA) is the full form of the abbreviation PGA used in SMD IC package.

    SMD Soldering

    • Oval type hot air pencil tip is used in SMD soldering.
    • The range of temperature setting on soldering work station for soldering SMD ICs is 250°C to 280°C.
    • Desoldering braid removes the molten solder from the joint on the PCB by capillary action.

    Bench Top Ionisers

    • The use of Bench top Ionisers is to control ESD in the work environment.

    Soldering Terms

    • Tinning in soldering refers to melting a little solder on the tip of the iron.
    • ESD event can cause a defect, which is known as a shellac defect.

    Reflow Soldering

    • The last zone on the reflow soldering process is the Cooling zone.
    • The second stage in the reflow soldering process is the Reflow zone.

    Component Effects

    • Exceeding the maximum ramp-up rate in the reflow soldering process can cause components to burn.

    Relays

    • Reed relay is used for time delay purposes and operates with very low power.
    • Impulse relay, Thermal relay, and Electromagnetic relay are other types of relays.

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    Description

    This quiz tests your knowledge of Surface Mount Device (SMD) IC packages and soldering techniques.

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