IPC CID EXAM SCRIPT COMPLETE
QUESTIONS AND ANSWERS PREMIUM
STUDY SHEET
◉ What are the three performance classes? Answer: 1-General Electronics 2-Dedicated Service 3-High
reliability
◉ Who is the end user? Answer: The end user is the individual or agency that contracts the printed
board or assembly to be designed and manufactured
◉ Who determines the class of a product? Answer: The end user
◉ What would be in class 3 performance? Answer: Military, medical, etc.
◉ What is ambient temperature? Answer: The surrounding environment that comes into contact with
your product
◉ What do producibility levels tell us? Answer: Increasing complexity of tooling, materials, and
processing. Yields increase as costs decrease, etc.
◉ What increases with each producibility level? Answer: Sophisitication
◉ What is the zaxis aspect ratio? Answer: Ratio between the nominal thickness of the board and the
smallest drill size.
◉ What is the most important special consideration in terms of electrical functionality that a designer
must consult the EE? Answer: Special keep out or keep in areas of the board.
◉ Where should high frequency circuits be placed? Answer: NEar the connector
, ◉ Where should filtering caps be placed? Answer: Near the source of power/gnd (at the connector)
◉ What is least important to route in analog circuits? Answer: Power and ground
◉ What is a major consideration for component placement? Answer: Will backwards compatibility be
necessary?
◉ What is Ohm's law? Answer: V=IR
◉ What is an important basic rule for a designer of a board? Answer: Terminate unused logic pins with a
pull-down or pull-up resistor.
◉ What product safety testing regards flame retardants? Answer: UL 94
◉ How thick is half ounce copper? Answer: 0.7 mils (17 um thick)
◉ What is the subtractive process? Answer: Unwanted copper is etched away
◉ What is the additive process? Answer: Only wanted copper is added to the board
◉ What must happen immediately after drilling the holes in the boards? Answer: Hole deburring
◉ What is an unsupported hole? Answer: A hole in the printed board that does not contain plating or
other conductive reinforcement
◉ What is a supported hole? Answer: A hole that has the inside surfaces plated or otherwise reinforced
◉ What is a buried via? Answer: A via that extends only between conductive layers with no exposure to
the outside world
QUESTIONS AND ANSWERS PREMIUM
STUDY SHEET
◉ What are the three performance classes? Answer: 1-General Electronics 2-Dedicated Service 3-High
reliability
◉ Who is the end user? Answer: The end user is the individual or agency that contracts the printed
board or assembly to be designed and manufactured
◉ Who determines the class of a product? Answer: The end user
◉ What would be in class 3 performance? Answer: Military, medical, etc.
◉ What is ambient temperature? Answer: The surrounding environment that comes into contact with
your product
◉ What do producibility levels tell us? Answer: Increasing complexity of tooling, materials, and
processing. Yields increase as costs decrease, etc.
◉ What increases with each producibility level? Answer: Sophisitication
◉ What is the zaxis aspect ratio? Answer: Ratio between the nominal thickness of the board and the
smallest drill size.
◉ What is the most important special consideration in terms of electrical functionality that a designer
must consult the EE? Answer: Special keep out or keep in areas of the board.
◉ Where should high frequency circuits be placed? Answer: NEar the connector
, ◉ Where should filtering caps be placed? Answer: Near the source of power/gnd (at the connector)
◉ What is least important to route in analog circuits? Answer: Power and ground
◉ What is a major consideration for component placement? Answer: Will backwards compatibility be
necessary?
◉ What is Ohm's law? Answer: V=IR
◉ What is an important basic rule for a designer of a board? Answer: Terminate unused logic pins with a
pull-down or pull-up resistor.
◉ What product safety testing regards flame retardants? Answer: UL 94
◉ How thick is half ounce copper? Answer: 0.7 mils (17 um thick)
◉ What is the subtractive process? Answer: Unwanted copper is etched away
◉ What is the additive process? Answer: Only wanted copper is added to the board
◉ What must happen immediately after drilling the holes in the boards? Answer: Hole deburring
◉ What is an unsupported hole? Answer: A hole in the printed board that does not contain plating or
other conductive reinforcement
◉ What is a supported hole? Answer: A hole that has the inside surfaces plated or otherwise reinforced
◉ What is a buried via? Answer: A via that extends only between conductive layers with no exposure to
the outside world
