1 Exampromax - Stuvia US2025/2026 dw dw dw dw
IPC CID+ Questions and Answers (100%
Correct Answers) Already Graded A+
Quiz: The board material has significant influence on the electrical performan
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ce of the circuit from what two effects?⼀
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Answer: dielectric constant and the loss tangent
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Quiz: What are the 4 types of build-up multilayers?⼀
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© 2025 Assignment Expert
Answer: Piercing post, Sequentially built-
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up multilayer, Passive substrate, Filled via sequential co-
Exampromax - Stuvia US
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laminated substrate dw
Quiz: The temperature at which anamorphous polymer changes from b
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eing a hard and relatively-
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brittle condition to be in a viscous or rubbery state
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Answer: Glass transition temperature (Tg)
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Quiz:
Affects dimensional stability and changes the electrical char dw dw dw dw dw dw dw
acteristic in the material which can cause potential difficulties in asse
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mbly⼀Answer: Moisture absorption d w dw
Quiz: What are the 3 general methods of plating material on PCBs?
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Answer: Immersion, electroless, and electrolytic
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Quiz: What are the benefits of metallic coatings / final(surface) finish?⼀
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Answer: Corrosion prevention, Improved long-term solderability
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Quiz:
,2 Exampromax - Stuvia US2025/2026 dw dw dw dw
Simplest of the wet processes; involves a simple galvanic re
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placement reaction; the more noble metal in the solution picks up
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, 3 Exampromax - Stuvia US2025/2026 dw dw dw dw
electrons from the less noble metal immersed in the solution and plates out
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⼀Answer: Immersion Plating d w dw
Quiz: Why would you use immersion plating?⼀
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Answer: The thickness is limited to a very thin coating as it is a simple replac
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ement reaction dw
Quiz: Why is Immersion finishes more beneficial than HASL?⼀
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Answer: Immersion has a flatter base for attachment
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What are the assembly challenges/problems with HASL process?
© 2025 Assignment Expert
Quiz: dw dw dw dw dw dw dw
⼀
Exampromax -StuviaUS
Answer: Coplanarity / solder thickness varies, solder crowning, less uniformit
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y
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dw
Quiz:
Stencil fits flat on pad, opening is smaller than the land pattern in al
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l dimensions⼀Answer: Gasketing
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dw
Quiz: What is the problem with gasketing in HASL?⼀
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Answer: Uneven surfaces cause leakage of paste underneath the stencil
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Quiz: What other surface finishes are better/flatter than HASL?⼀
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Answer: Gray tin, nickel/gold, nickel/palladium gold, immersion "white"
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tin, immersion silver, ENIG
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Quiz: What surface finish is good for BGAs and surface mount?⼀
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Answer: ENIG
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Quiz:
Why would you use a washable solder mask / what is the advant
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, 4 Exampromax - Stuvia US2025/2026
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age?⼀
Answer: Washable masks are removable; they come off in a cleaning opera
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tion
IPC CID+ Questions and Answers (100%
Correct Answers) Already Graded A+
Quiz: The board material has significant influence on the electrical performan
dw dw dw dw dw dw dw dw dw dw
ce of the circuit from what two effects?⼀
dw dw dw dw dw dw dw
Answer: dielectric constant and the loss tangent
d w dw dw dw dw dw
Quiz: What are the 4 types of build-up multilayers?⼀
dw dw dw dw dw dw dw
© 2025 Assignment Expert
Answer: Piercing post, Sequentially built-
d w dw dw dw
up multilayer, Passive substrate, Filled via sequential co-
Exampromax - Stuvia US
dw dw dw dw dw dw dw
laminated substrate dw
Quiz: The temperature at which anamorphous polymer changes from b
d w dw dw dw dw dw dw dw dw
eing a hard and relatively-
dw dw dw dw
brittle condition to be in a viscous or rubbery state
dw dw dw dw dw dw dw dw dw ⼀
Answer: Glass transition temperature (Tg)
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Quiz:
Affects dimensional stability and changes the electrical char dw dw dw dw dw dw dw
acteristic in the material which can cause potential difficulties in asse
dw dw dw dw dw dw dw dw dw dw
mbly⼀Answer: Moisture absorption d w dw
Quiz: What are the 3 general methods of plating material on PCBs?
d w d w dw dw dw dw dw dw dw dw dw dw ⼀
Answer: Immersion, electroless, and electrolytic
dw d w dw dw dw
Quiz: What are the benefits of metallic coatings / final(surface) finish?⼀
dw dw dw dw dw dw dw dw dw
Answer: Corrosion prevention, Improved long-term solderability
dw d w dw dw dw dw
Quiz:
,2 Exampromax - Stuvia US2025/2026 dw dw dw dw
Simplest of the wet processes; involves a simple galvanic re
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placement reaction; the more noble metal in the solution picks up
dw dw dw dw dw dw dw dw dw dw
, 3 Exampromax - Stuvia US2025/2026 dw dw dw dw
electrons from the less noble metal immersed in the solution and plates out
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⼀Answer: Immersion Plating d w dw
Quiz: Why would you use immersion plating?⼀
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Answer: The thickness is limited to a very thin coating as it is a simple replac
d w dw dw dw dw dw dw dw dw dw dw dw dw dw dw
ement reaction dw
Quiz: Why is Immersion finishes more beneficial than HASL?⼀
dw dw dw dw dw dw dw
Answer: Immersion has a flatter base for attachment
dw dw dw dw dw dw dw
What are the assembly challenges/problems with HASL process?
© 2025 Assignment Expert
Quiz: dw dw dw dw dw dw dw
⼀
Exampromax -StuviaUS
Answer: Coplanarity / solder thickness varies, solder crowning, less uniformit
dw
d w dw dw dw dw dw dw dw dw
dw
y
dw
dw
Quiz:
Stencil fits flat on pad, opening is smaller than the land pattern in al
dw dw dw dw dw dw dw dw dw dw dw dw dw
l dimensions⼀Answer: Gasketing
dw d w
dw
Quiz: What is the problem with gasketing in HASL?⼀
dw
dw dw dw dw dw dw dw
Answer: Uneven surfaces cause leakage of paste underneath the stencil
d w dw dw dw dw dw dw dw dw
Quiz: What other surface finishes are better/flatter than HASL?⼀
dw dw dw dw dw dw dw
Answer: Gray tin, nickel/gold, nickel/palladium gold, immersion "white"
dw d w dw dw dw dw dw dw dw
tin, immersion silver, ENIG
dw dw dw
Quiz: What surface finish is good for BGAs and surface mount?⼀
dw dw dw dw dw dw dw dw dw
Answer: ENIG
dw d w
Quiz:
Why would you use a washable solder mask / what is the advant
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, 4 Exampromax - Stuvia US2025/2026
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age?⼀
Answer: Washable masks are removable; they come off in a cleaning opera
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tion
