WorksheetsPRACTICE EXAM (FA)
Total questions: 82
Worksheet time: 41mins
It is the result of defects introduced during manufacturing or assembly process.
early-life failures
wear-out
event-related failures
This type of failure is due to the deterioration of the design strength of a device resulting from the operation and exposure to environmental fluctuations.
early-life failures
wear-out
event-related failures
The most complicated among the electrical failure categories.
functional
electrical
parametric
continuity
Which of the following is the illumination source of Transmission Electron Microscope (TEM)?
light
neutron
electron
What is the focus depth (x500) of a light optical microscope?
500 um
0.1-1 mm
2-3 um
50 um
Which of the following is the voltage source (hardware) of scanning electron microscope (SEM)?
low voltage
25-300kV
0.5 – 30kV
It uses lights that are reflected from the sample?
reflected microscope
reflexive microscope
refracted microscope
incident microscope
_______ is a widely used style of semiconductor package mainly used for transistors.
TO-92
SOD-323
TO-204
SOD-123
It is based on ball grid array technology. It has thinner contacts and is mainly used in system-on-a-chip designs.
Fine Ball Grid Array
Die-Size Ball Grid Array
Chip Array Ball Grid Array
Current at the reversed bias pn junction with the Drain-Source terminal short circuited (0V) of N channel JFET.
I(DSS)
V(DSS)
I(GSS)
V(GSS)
The cutoff voltage of a JFET is the voltage that is needed at the gate-source region of the P channel JFET in order to turn it off.
V(GS-TH)
V(BR-GSS)
V(GS-OFF)
V(GS-F)
It is the voltage at which the MOSFET channel begins to conduct.
V(GS-TH)
V(BR-GSS)
V(GS-OFF)
V(GS-F)
Reduction in x-ray intensity due to attenuation is a function of a linear absorption coefficient and the sample ________
SIZE
SHAPE
THICKNESS
DIMENSION
_______ is a type of surface-mount packaging (a chip carrier) used for integrated circuits.
Quad Flat Package
Ball Grid Array
Thin Quad Flat Package
Fat Quad Flat Package
Focus of TEM?
Shallow
Deep
Medium
Light
These are the common sources of failures except?
Reliability Test Failures
Low Yielding Lots
Engineering Evaluation
Output per process
Among the sources of failures, which is the 2nd top priority?
Reliability Test Failures
Low Yielding Lots
Qualification Failures
Output per process
This is the last process in the Failure Analysis Flow?
Non- destructive Inspection
Root cause Analysis
FMEA
High Magnification Imaging
This is the level process in the Failure Analysis Flow?
Electrical characterization
Destructive Inspection
Non- destructive Inspection
Failure Isolation
It plays a significant role in failure analysis and the starting point of a good and successful failure analysis?
Electrical characterization
Destructive Inspection
Non- destructive Inspection
Failure Isolation
It provides necessary information for technology advancement and for corrective action to improve quality and reliability?
Root cause Analysis
Failure Analysis
FMEA
High Magnification Imaging
It is used to best described the failure of electronic or mechanical components.
FMEA
Bath-Tub Curve
Root Cause Analysis
Pareto
For semiconductor devices, these are failures due to defects during fabrication, improper design of the component, or random failures that have not failed during fabrication screening processes.
Infant Mortality Portion
Ramdom Failures
Wearout Period
FA technique for revealing the internal structure of a device or IC for examination?
Deprocessing
Decapsulation
Both are correct
Both are wrong
For semiconductor devices, stresses due to high temperature, high voltage current, humidity, vibration, mechanical or thermal shock are examples of failures encountered during what period?
Infant-Mortality Period
Wearout Period
Useful Life Period
Examples of these types of failures are corrosion, electrical leakage, insulation breakdown, cracking of encapsulation due to the deterioration of the material, and cracks in the bond wires.
Early Failures
Wearout Failures
Random Failures
Approximately 60% of the failures are due to ______
Electrical Overstress (EOS)
Electrostatic Static Discharge damage (ESD)
Both are correct
Both are wrong
What are the two types of components?
Discrete & IC
Analog & IC
Logic & IC
It is used to analyze the characteristics of discrete devices such as diodes and transistors.
Oscilloscope
SEM
Curve Tracer
Challenges in IC characterization
Shrinking feature sizes
Increased device complexity
Both are wrong
Both are correct
One of the main failures of integrated circuits (ICs) due to mismatch of thermal expansion coefficients.
Delamination
Die Cracking
Lifted Wire Bond
Passivation Cracking
Type of package that houses a small semiconducting die, with nanowires attaching the die to the lead frames, allowing for electrical connections to be made to a PCB.
Single in-line package
Dual in-line package
Ball Grid Array
Lead Frame
What are Ultrasonic Waves?
Ultrasonic waves refer to sound waves above ________ (not audible to the human ear)
20 kHz
20 MHz
30 kHz
10 kHz
A material preparation in which a process sequence of cutting, rough grinding and fine polishing a specimen at cross section in preparation for an imaging and inspection are done
Parallel Lapping
Cross Sectioning
Molding
Cutting
It causes the transistor to enter the breakdown region where the transistor receives too much voltage across its drain-source terminal that causes the drain-source terminal to break down, which makes the drain current (ID) to drastically increase.
Drain – Source Breakdown Voltage
Drain – Source Leakage Current
Gate – Source Threshold Voltage
Gate – Source Leakage Voltage
______ is the voltage at which the MOSFET channel begins to conduct. At this voltage, a positive voltage creates an electric field, which attracts electron.
Drain-Source On-State Resistance
Drain – Source Breakdown Voltage
Drain – Source Leakage Voltage
Gate – Source Threshold Voltage
It is a sample preparation equipment that fires electrons at a sample until they are thin enough to be transparent to electron for TEM
Curve Tracer
Oscilloscope
Microscope
SEM
It is often referred to as light emission microscopy,
photoemission microscopy, or by the trade name EMMI - EMission MIcroscopy.
Emission Microscopy
Light Microscopy
Optical Microscopy
It uses ultrasound waves to image interfaces and detect possible defects within optically opaque structures and
components such as chip capacitors, chip resistors, circuit board traces, discrete semiconductor devices, integrated circuits (ICS), and other electronic components.
Scanning Acoustic Microscopy
X Ray Radiology
Light Microscopy
Optical Microscopy
To create and analyze these ultrasonic waves of SAM, piezoelectric ___________ are used.
Transducers
Lenses
Stages
They are primary beam electrons that have undergone one or more elastic (billiard ball-type) collisions within the sample and eventually have bounced around enough to re-emerge from the surface they came in.
Primary electron
Secondary electron
Backscattered electron
they are generated by other radiation (the primary radiation). This radiation can be in the form of ions, electrons, or photons with sufficiently high energy, i.e. exceeding the ionization potential.
Primary electron
Secondary electron
Backscattered electron
They are beam electrons that are reflected from the sample by elastic scattering.
Primary electron
Secondary electron
Backscattered electron
It is the smallest interval measurable by a scientific
(especially optical) instrument; the resolving power.
It is the degree of detail visible in a photographic
or television image.
Magnification
Focus
Acceleration Voltage
Resolution
It refers to the state or quality of having or producing clear visual definition.
Magnification
Focus
Acceleration Voltage
Resolution
It refers to the inspection of the sample at higher magnification using an instrument known as an
optical or light microscope.
Scanning Acoustic Microscopy
X Ray Radiology
Optical Microscopy
it is a nondestructive semiconductor failure analysis technique used to examine the interior details of the package. It operates on the principle of dissimilar transmission of X-Rays through different materials.
X ray Radiography
Light Microscopy
Scanning Acoustic Microscopy
It a method that enables comparisons between features of
subsequent assemblies and the programmed features of good board assembly to determine if they pass or fail.
Automated Optical Inspection
X ray Radiography
Light Microscopy
It is the voltage between drain-to-source at which FET begins to conduct with no gate voltage applied
BVDSS
VDS
VGS(TH)
VTH
It is the voltage between drain-to-source at which FET begins to conduct with no gate voltage applied
BVDSS
VDS
VGS(TH)
VTH
It is the leakage current that occurs when the specified voltage is applied across gate and source with drain and source short circuited.
IGSS
IGS
IDS
IDSS
It is the measure of the smallest detail that can be observed
magnification
focus
resolution
The resolution of the naked eye?
0.1 mm
0.01 mm
1 mm
0.001 mm
It is the expression of the number of times the sample being examined appears to be enlarged.
magnification
focus
resolution
Sharp view of the enlarged image of the specimen.
magnification
focus
resolution
Height of the specimen at which the image appears to be focused / sharp.
Depth of focus
Focus
Magnification
Resolution
Interaction volume is directly proportional to the accelerating voltage.
TRUE
FALSE
Energy of electron from atom is lost to atom.
Inelastic scattering
Elastic scattering
The higher the atomic number of the atoms the more backscattered electrons are ‘bounced back’ out.
TRUE
FALSE
The 4th level of Failure Analysis
Fault Isolation
Destructive Inspection
Root cause Analysis
Material Identification
The final step in doing Failure Analysis
Fault Isolation
Destructive Inspection
Root cause Analysis
Material Identification
Electrical failures are grouped according to_____?
Continuity
Parametric
Functional
All answers are correct
_________ is one of the features of most SMU with the capability to measure ultra low current up to fA.
Guard Technology
Auto Ranging Function
Current Measure Unit
Voltage Measure Unit
_________ is one of the features of most SMU with the capability to protect devices from damage caused by excessive voltage or current.
Guard Technology
Auto Ranging Function
Current/Voltage Measure Unit
I/V Limit Compliance Function
_________ is one of the features of most SMU with wide coverage of current/voltage with the best resolution
Guard Technology
Auto Ranging Function
Current/Voltage Measure Unit
Compliance Function
Characteristic acoustic impedance of layers using SAM depends on _______
material density
speed of sound in the material
both are correct
both are wrong
It is the ratio of reflected to incident pressure amplitude across two media.
Acoustic Reflection Coefficient
Characteristic Acoustic Impedance
Acoustic Transmission Coefficient
It is the value equal to 1- the absolute value of Acoustic Reflection Coefficient
Reflection Coefficient
Characteristic Acoustic Impedance
Acoustic Transmission Coefficient
X-ray result depends on the ______
Material Thickness
Material Type
Material Density
All of the above
It is the preferred filament because of X-Ray due to high melting point during high voltage application.
Tungsten
Aluminum
Titanium
Tantalum
It connects the eyepiece to the objective lenses
Tube
Arm
Base
It supports the tube and connects it to the base
Tube
Arm
Base
The bottom of the microscope, used for support
Tube
Arm
Base
A steady light source used in place of a mirror.
Tube
Arm
Base
Illumination
The flat platform where you place your slides.
Stage
Arm
Base
Illumination
This is the part that holds two or more objective lenses and can be rotated to easily change power.
Turret
Arm
Base
Illumination
This is an adjustment that determines how close the objective lens can get to the slide.
Rack Stop
Arm
Base
Illumination
It uses lights that passes through (transmitted) from the sample
Reflected Microscope
Transmitted Microscope
Both are correct
Both are wrong
It uses lights that are reflected from the sample.
Reflected Microscope
Transmitted Microscope
Both are correct
Both are wrong
It is used for metallurgical and industrial application.
Reflected Microscope
Transmitted Microscope
Both are correct
Both are wrong
It is used for biological, crystals and plastics inspection.
Reflected Microscope
Transmitted Microscope
Both are correct
Both are wrong
It is expressed as the product of the density and the speed of sound wave
Acoustic Impedance
Acoustic Relection
Acoustic Coeffiecinet
