IPC CID+ QUESTIONS WITH 100%
CORRECT ANSWERS.
Differences in overall resin content and the use of different styles of glass cloth; more
resin/glass content can produce the same external thickness - ✔✔What variation
in construction change the physical and electrical performance of pcbs?
SPC (Statistical Process Control) - ✔✔Integral part of the manufacturing and testing process;
considered in all aspects during the manufaturing process and NOT confined to an evaluation
at the end of the line
In-process coupon evaluation may be cross-sectioned and evaluated; first article inspection
may be performed to ensure the remainder of the lot would be in conformance - ✔✔What is
an example of an SPC?
Test coupons / specimens - ✔✔These specimens are representative of a the
product produced and must represent the process
Provides a systematic path for continuous improvement, identifies root causes of problems,
reduces the number of evaluations that need to be made at the end of the production cycle -
✔✔What is the purpose of in-process test coupons?
Test coupon AB/R evaluation - ✔✔Hole solderability, thermal stress, plating thickness,
layer registration, anything related to hole condition within a 2-sided/multilayer board
Reliability - ✔✔Ability of a product to function under given conditions and for a
specified period of time without exceeding acceptable failure limits
,Determine the functionality of equipment and the environment in which it is to operate
- ✔✔What is the importance of reliability?
HAST - ✔✔Stress testing to failure, focuses on reliability
Burn-in - ✔✔Eliminate infant mortality
Product Quality Life-Cycle Tracking - ✔✔Identifies mechanical, physical, visual and electrical
test normally required by a customer in order to ensure that the quality life-cycle tracking data
is available; specified on applicable performance specification
Sampling plan - ✔✔Frequency of examination; identify if a production lot meets
specific requirements
Zero-base (no defects in the sampled lot) - ✔✔What does IPC recommend in term
of sampling plans
zero-base - ✔✔No defects in the sample lots; if defects are found, the entire lot must
be examined
Quality documentation plan - ✔✔What should every manufacturer have as an
important measurement tool that is simple and easy for the operators to enter data?
Bar codes - ✔✔Easy method in the form of labels for operators to record documentation
ROHS and REACH - ✔✔Regulations focused on materials or substances that are contained
in products
, Fatigue caused by thermal cycles, sudden shock (drop) or stress, long-term stress -
✔✔3 nodes of solder joint failure
Fatigue caused by thermal cycles - ✔✔Most common form of solder joint failure
Leadless components and castellation-type leads - ✔✔What is the best part for risk to
solder cracking due to thermal mismatch?
Laminate materials/mixed dielectrics, number of layers, total number of holes, minimum hole
size, panel utilization, lamination cycles, co-planar, plated via-in-pad epoxy filled, back-
drilling, impedance control - ✔✔What are key cost drivers for bare board manufacturing?
electrical DRC's such as controlled signal lengths for timing - ✔✔DRC's for fabricators and
assemblers often do not take into account what type of DRCs
Fabrication Panel - ✔✔Rectangular sheet of base material that is used for the processing
of 1+ printed boards, and when required, one or more test coupons
Assembly Array - ✔✔Printed board image/patterns plus the additional
contiguous deliverable material from the panel (+ tabs, fiducials, tooling holes,
etc...)
18x24in, 460x610mm - ✔✔What is the most common size panel?
Nominal positioning location between two-dimensional variations - ✔✔Stencil
manufacturer work to what location/
Alignment fiducials - ✔✔What should the designer consider adding to help the
stencil manufacturers?
CORRECT ANSWERS.
Differences in overall resin content and the use of different styles of glass cloth; more
resin/glass content can produce the same external thickness - ✔✔What variation
in construction change the physical and electrical performance of pcbs?
SPC (Statistical Process Control) - ✔✔Integral part of the manufacturing and testing process;
considered in all aspects during the manufaturing process and NOT confined to an evaluation
at the end of the line
In-process coupon evaluation may be cross-sectioned and evaluated; first article inspection
may be performed to ensure the remainder of the lot would be in conformance - ✔✔What is
an example of an SPC?
Test coupons / specimens - ✔✔These specimens are representative of a the
product produced and must represent the process
Provides a systematic path for continuous improvement, identifies root causes of problems,
reduces the number of evaluations that need to be made at the end of the production cycle -
✔✔What is the purpose of in-process test coupons?
Test coupon AB/R evaluation - ✔✔Hole solderability, thermal stress, plating thickness,
layer registration, anything related to hole condition within a 2-sided/multilayer board
Reliability - ✔✔Ability of a product to function under given conditions and for a
specified period of time without exceeding acceptable failure limits
,Determine the functionality of equipment and the environment in which it is to operate
- ✔✔What is the importance of reliability?
HAST - ✔✔Stress testing to failure, focuses on reliability
Burn-in - ✔✔Eliminate infant mortality
Product Quality Life-Cycle Tracking - ✔✔Identifies mechanical, physical, visual and electrical
test normally required by a customer in order to ensure that the quality life-cycle tracking data
is available; specified on applicable performance specification
Sampling plan - ✔✔Frequency of examination; identify if a production lot meets
specific requirements
Zero-base (no defects in the sampled lot) - ✔✔What does IPC recommend in term
of sampling plans
zero-base - ✔✔No defects in the sample lots; if defects are found, the entire lot must
be examined
Quality documentation plan - ✔✔What should every manufacturer have as an
important measurement tool that is simple and easy for the operators to enter data?
Bar codes - ✔✔Easy method in the form of labels for operators to record documentation
ROHS and REACH - ✔✔Regulations focused on materials or substances that are contained
in products
, Fatigue caused by thermal cycles, sudden shock (drop) or stress, long-term stress -
✔✔3 nodes of solder joint failure
Fatigue caused by thermal cycles - ✔✔Most common form of solder joint failure
Leadless components and castellation-type leads - ✔✔What is the best part for risk to
solder cracking due to thermal mismatch?
Laminate materials/mixed dielectrics, number of layers, total number of holes, minimum hole
size, panel utilization, lamination cycles, co-planar, plated via-in-pad epoxy filled, back-
drilling, impedance control - ✔✔What are key cost drivers for bare board manufacturing?
electrical DRC's such as controlled signal lengths for timing - ✔✔DRC's for fabricators and
assemblers often do not take into account what type of DRCs
Fabrication Panel - ✔✔Rectangular sheet of base material that is used for the processing
of 1+ printed boards, and when required, one or more test coupons
Assembly Array - ✔✔Printed board image/patterns plus the additional
contiguous deliverable material from the panel (+ tabs, fiducials, tooling holes,
etc...)
18x24in, 460x610mm - ✔✔What is the most common size panel?
Nominal positioning location between two-dimensional variations - ✔✔Stencil
manufacturer work to what location/
Alignment fiducials - ✔✔What should the designer consider adding to help the
stencil manufacturers?
