Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

PRACTICE EXAM (FA)

Total questions: 82

Worksheet time: 41mins

Name
Class
Date
1.

It is the result of defects introduced during manufacturing or assembly process.

a)

early-life failures

b)

wear-out

c)

event-related failures

2.

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.

a)

early-life failures

b)

wear-out

c)

event-related failures

3.

The most complicated among the electrical failure categories.

a)

functional

b)

electrical

c)

parametric

d)

continuity

4.

Which of the following is the illumination source of Transmission Electron Microscope (TEM)?

a)

light

b)

neutron

c)

electron

5.

What is the focus depth (x500) of a light optical microscope?

a)

500 um

b)

0.1-1 mm

c)

2-3 um

d)

50 um

6.

Which of the following is the voltage source (hardware) of scanning electron microscope (SEM)?

a)

low voltage

b)

25-300kV

c)

0.5 – 30kV

7.

It uses lights that are reflected from the sample?

a)

reflected microscope

b)

reflexive microscope

c)

refracted microscope

d)

incident microscope

8.

_______ is a widely used style of semiconductor package mainly used for transistors.

a)

TO-92

b)

SOD-323

c)

TO-204

d)

SOD-123

9.

It is based on ball grid array technology. It has thinner contacts and is mainly used in system-on-a-chip designs.

a)

Fine Ball Grid Array

b)

Die-Size Ball Grid Array

c)

Chip Array Ball Grid Array

10.

Current at the reversed bias pn junction with the Drain-Source terminal short circuited (0V) of N channel JFET.

a)

I(DSS)

b)

V(DSS)

c)

I(GSS)

d)

V(GSS)

11.

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.

a)

V(GS-TH)

b)

V(BR-GSS)

c)

V(GS-OFF)

d)

V(GS-F)

12.

It is the voltage at which the MOSFET channel begins to conduct.

a)

V(GS-TH)

b)

V(BR-GSS)

c)

V(GS-OFF)

d)

V(GS-F)

13.

Reduction in x-ray intensity due to attenuation is a function of a linear absorption coefficient and the sample ________

a)

SIZE

b)

SHAPE

c)

THICKNESS

d)

DIMENSION

14.

_______ is a type of surface-mount packaging (a chip carrier) used for integrated circuits.

a)

Quad Flat Package

b)

Ball Grid Array

c)

Thin Quad Flat Package

d)

Fat Quad Flat Package

15.

Focus of TEM?

a)

Shallow

b)

Deep

c)

Medium

d)

Light

16.

These are the common sources of failures except?

a)

Reliability Test Failures

b)

Low Yielding Lots

c)

Engineering Evaluation

d)

Output per process

17.

Among the sources of failures, which is the 2nd top priority?

a)

Reliability Test Failures

b)

Low Yielding Lots

c)

Qualification Failures

d)

Output per process

18.

This is the last process in the Failure Analysis Flow?

a)

Non- destructive Inspection

b)

Root cause Analysis

c)

FMEA

d)

High Magnification Imaging

19.

This is the level process in the Failure Analysis Flow?

a)

Electrical characterization

b)

Destructive Inspection

c)

Non- destructive Inspection

d)

Failure Isolation

20.

It plays a significant role in failure analysis and the starting point of a good and successful failure analysis?

a)

Electrical characterization

b)

Destructive Inspection

c)

Non- destructive Inspection

d)

Failure Isolation

21.

It provides necessary information for technology advancement and for corrective action to improve quality and reliability?

a)

Root cause Analysis

b)

Failure Analysis

c)

FMEA

d)

High Magnification Imaging

22.

It is used to best described the failure of electronic or mechanical components.

a)

FMEA

b)

Bath-Tub Curve

c)

Root Cause Analysis

d)

Pareto

23.

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.

a)

Infant Mortality Portion

b)

Ramdom Failures

c)

Wearout Period

24.

FA technique for revealing the internal structure of a device or IC for examination?

a)

Deprocessing

b)

Decapsulation

c)

Both are correct

d)

Both are wrong

25.

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?

a)

Infant-Mortality Period

b)

Wearout Period

c)

Useful Life Period

26.

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.

a)

Early Failures

b)

Wearout Failures

c)

Random Failures

27.

Approximately 60% of the failures are due to ______

a)

Electrical Overstress (EOS)

b)

Electrostatic Static Discharge damage (ESD)

c)

Both are correct

d)

Both are wrong

28.

What are the two types of components?

a)

Discrete & IC

b)

Analog & IC

c)

Logic & IC

29.

It is used to analyze the characteristics of discrete devices such as diodes and transistors.

a)

Oscilloscope

b)

SEM

c)

Curve Tracer

30.

Challenges in IC characterization

a)

Shrinking feature sizes

b)

Increased device complexity

c)

Both are wrong

d)

Both are correct

31.

One of the main failures of integrated circuits (ICs) due to mismatch of thermal expansion coefficients.

a)

Delamination

b)

Die Cracking

c)

Lifted Wire Bond

d)

Passivation Cracking

32.

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.

a)

Single in-line package

b)

Dual in-line package

c)

Ball Grid Array

d)

Lead Frame

33.

What are Ultrasonic Waves?


Ultrasonic waves refer to sound waves above ________ (not audible to the human ear)

a)

20 kHz

b)

20 MHz

c)

30 kHz

d)

10 kHz

34.

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

a)

Parallel Lapping

b)

Cross Sectioning

c)

Molding

d)

Cutting

35.

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.

a)

Drain – Source Breakdown Voltage

b)

Drain – Source Leakage Current

c)

Gate – Source Threshold Voltage

d)

Gate – Source Leakage Voltage

36.

______ is the voltage at which the MOSFET channel begins to conduct. At this voltage, a positive voltage creates an electric field, which attracts electron.

a)

Drain-Source On-State Resistance

b)

Drain – Source Breakdown Voltage

c)

Drain – Source Leakage Voltage

d)

Gate – Source Threshold Voltage

37.

It is a sample preparation equipment that fires electrons at a sample until they are thin enough to be transparent to electron for TEM

a)

Curve Tracer

b)

Oscilloscope

c)

Microscope

d)

SEM

38.

It is often referred to as light emission microscopy,

photoemission microscopy, or by the trade name EMMI - EMission MIcroscopy.

a)

Emission Microscopy

b)

Light Microscopy

c)

Optical Microscopy

39.

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.

a)

Scanning Acoustic Microscopy

b)

X Ray Radiology

c)

Light Microscopy

d)

Optical Microscopy

40.

To create and analyze these ultrasonic waves of SAM, piezoelectric ___________ are used.

a)

Transducers

b)

Lenses

c)

Stages

41.

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.

a)

Primary electron

b)

Secondary electron

c)

Backscattered electron

42.

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.

a)

Primary electron

b)

Secondary electron

c)

Backscattered electron

43.

They are beam electrons that are reflected from the sample by elastic scattering.

a)

Primary electron

b)

Secondary electron

c)

Backscattered electron

44.

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.

a)

Magnification

b)

Focus

c)

Acceleration Voltage

d)

Resolution

45.

It refers to the state or quality of having or producing clear visual definition.

a)

Magnification

b)

Focus

c)

Acceleration Voltage

d)

Resolution

46.

It refers to the inspection of the sample at higher magnification using an instrument known as an

optical or light microscope.

a)

Scanning Acoustic Microscopy

b)

X Ray Radiology

c)

Optical Microscopy

47.

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.

a)

X ray Radiography

b)

Light Microscopy

c)

Scanning Acoustic Microscopy

48.

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.

a)

Automated Optical Inspection

b)

X ray Radiography

c)

Light Microscopy

49.

It is the voltage between drain-to-source at which FET begins to conduct with no gate voltage applied

a)

BVDSS

b)

VDS

c)

VGS(TH)

d)

VTH

50.

It is the voltage between drain-to-source at which FET begins to conduct with no gate voltage applied

a)

BVDSS

b)

VDS

c)

VGS(TH)

d)

VTH

51.

It is the leakage current that occurs when the specified voltage is applied across gate and source with drain and source short circuited.

a)

IGSS

b)

IGS

c)

IDS

d)

IDSS

52.

It is the measure of the smallest detail that can be observed

a)

magnification

b)

focus

c)

resolution

53.

The resolution of the naked eye?

a)

0.1 mm

b)

0.01 mm

c)

1 mm

d)

0.001 mm

54.

It is the expression of the number of times the sample being examined appears to be enlarged.

a)

magnification

b)

focus

c)

resolution

55.

Sharp view of the enlarged image of the specimen.

a)

magnification

b)

focus

c)

resolution

56.

Height of the specimen at which the image appears to be focused / sharp.

a)

Depth of focus

b)

Focus

c)

Magnification

d)

Resolution

57.

Interaction volume is directly proportional to the accelerating voltage.

a)

TRUE

b)

FALSE

58.

Energy of electron from atom is lost to atom.

a)

Inelastic scattering

b)

Elastic scattering

59.

The higher the atomic number of the atoms the more backscattered electrons are ‘bounced back’ out.

a)

TRUE

b)

FALSE

60.

The 4th level of Failure Analysis

a)

Fault Isolation

b)

Destructive Inspection

c)

Root cause Analysis

d)

Material Identification

61.

The final step in doing Failure Analysis

a)

Fault Isolation

b)

Destructive Inspection

c)

Root cause Analysis

d)

Material Identification

62.

Electrical failures are grouped according to_____?

a)

Continuity

b)

Parametric

c)

Functional

d)

All answers are correct

63.

_________ is one of the features of most SMU with the capability to measure ultra low current up to fA.

a)

Guard Technology

b)

Auto Ranging Function

c)

Current Measure Unit

d)

Voltage Measure Unit

64.

_________ is one of the features of most SMU with the capability to protect devices from damage caused by excessive voltage or current.

a)

Guard Technology

b)

Auto Ranging Function

c)

Current/Voltage Measure Unit

d)

I/V Limit Compliance Function

65.

_________ is one of the features of most SMU with wide coverage of current/voltage with the best resolution

a)

Guard Technology

b)

Auto Ranging Function

c)

Current/Voltage Measure Unit

d)

Compliance Function

66.

Characteristic acoustic impedance of layers using SAM depends on _______

a)

material density

b)

speed of sound in the material

c)

both are correct

d)

both are wrong

67.

It is the ratio of reflected to incident pressure amplitude across two media.

a)

Acoustic Reflection Coefficient

b)

Characteristic Acoustic Impedance

c)

Acoustic Transmission Coefficient

68.

It is the value equal to 1- the absolute value of Acoustic Reflection Coefficient

a)

Reflection Coefficient

b)

Characteristic Acoustic Impedance

c)

Acoustic Transmission Coefficient

69.

X-ray result depends on the ______

a)

Material Thickness

b)

Material Type

c)

Material Density

d)

All of the above

70.

It is the preferred filament because of X-Ray due to high melting point during high voltage application.

a)

Tungsten

b)

Aluminum

c)

Titanium

d)

Tantalum

71.

It connects the eyepiece to the objective lenses

a)

Tube

b)

Arm

c)

Base

72.

It supports the tube and connects it to the base

a)

Tube

b)

Arm

c)

Base

73.

The bottom of the microscope, used for support

a)

Tube

b)

Arm

c)

Base

74.

A steady light source used in place of a mirror.

a)

Tube

b)

Arm

c)

Base

d)

Illumination

75.

The flat platform where you place your slides.

a)

Stage

b)

Arm

c)

Base

d)

Illumination

76.

This is the part that holds two or more objective lenses and can be rotated to easily change power.

a)

Turret

b)

Arm

c)

Base

d)

Illumination

77.

This is an adjustment that determines how close the objective lens can get to the slide.

a)

Rack Stop

b)

Arm

c)

Base

d)

Illumination

78.

It uses lights that passes through (transmitted) from the sample

a)

Reflected Microscope

b)

Transmitted Microscope

c)

Both are correct

d)

Both are wrong

79.

It uses lights that are reflected from the sample.

a)

Reflected Microscope

b)

Transmitted Microscope

c)

Both are correct

d)

Both are wrong

80.

It is used for metallurgical and industrial application.

a)

Reflected Microscope

b)

Transmitted Microscope

c)

Both are correct

d)

Both are wrong

81.

It is used for biological, crystals and plastics inspection.

a)

Reflected Microscope

b)

Transmitted Microscope

c)

Both are correct

d)

Both are wrong

82.

It is expressed as the product of the density and the speed of sound wave

a)

Acoustic Impedance

b)

Acoustic Relection

c)

Acoustic Coeffiecinet