CIS PCB Design & Fabrication Standards Flashcards
6 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 6 CIS PCB Design & Fabrication Standards flashcards as text
According to IPC-2221, what is the minimum electrical clearance required between conductors at 101–170V AC in an uncoated internal layer?
Answer: 0.2 mm
IPC-2221 specifies 0.2 mm minimum clearance for uncoated internal conductors operating at 101–170V AC.
Which IPC standard specifically covers the design of rigid printed boards?
Answer: IPC-2221
IPC-2221 is the generic standard for the design of organic printed boards and assemblies.
What does the term 'annular ring' refer to on a printed circuit board?
Answer: The copper remaining on a pad after drilling
The annular ring is the portion of conductive material (copper) that remains on a pad after a hole has been drilled through it.
IPC-6012 establishes qualification and performance requirements for which type of boards?
Answer: Rigid printed boards
IPC-6012 covers qualification and performance specification for rigid printed boards.
What is 'controlled impedance' in PCB design?
Answer: Designing traces to a specific characteristic impedance value
Controlled impedance means designing PCB traces to achieve a specific characteristic impedance (e.g., 50Ω) to ensure signal integrity.
According to IPC-2221, which laminate property most directly affects the dielectric constant of a PCB?
Answer: Resin content (Dk)
The resin content and dielectric constant (Dk) of the laminate material directly determine the board's dielectric constant.