ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
PRESENTATION
ELECTROSTATIC
DISCHARGE SENSITIVE
DEVICES TRAINING
COURSE NO: 00191
Quick Aviation Consultants ESD Work Station
3M Model 724 Work Station Monitor
1
ABOUT ESD
Background
Most people only think of static electricity as the shock from touching
a metal doorknob after walking across a carpet. However, static discharge
can be very dangerous in modern work environments. Electronic devices
have become more sensitive to static discharge as they have become faster
and smaller. ESD impacts productivity and product reliability in almost every
aspect of today electronics environment. Electrostatic control also applies to
other industries such as clean room applications and graphic arts.
ESD affects manufacturing cost, product quality, production yields,
product reliability, and profitability. Experts have estimated the average
product losses due to static to be from 8-33%. This could quantify the amount
lost due to ESD, or electro-static discharge, to be in the billions ever year.
Whether it is the cost of a damaged diode which may only cost a few cents or
a complex hybrid which could run a company several hundred dollars, the
threat of ESD is growing concern. Other looses due to ESD could be costs of
repair and rework, re-shipping, extra labor..
2
ESD ON SYSTEMS
Any Electronic Equipment Can Be Damaged By ESD
3
CREATING A STATIC ELECTRICITY CHARGE
Static electricity is an electrical charge caused by an imbalance of electrons on a surface.
This imbalance creates a measureable electric field that can influence other objects at a
distance. Electrostatic discharge is the transfer of charge between bodies at different
electrical potentials.
Electrostatic discharge can change the electrical characteristics of a
semiconductor device, degrading or destroying it. Electrostatic discharge also may upset
the normal operation of an electronic system, causing equipment malfunction or failure.
Another problem caused by static electricity occurs in clean rooms. Charged surfaces
can attract and hold contaminants, making removal from the environment difficult, When
attracted to the surface of silicon water or a device’s electrical circuitry, these particulates
can cause random water effects and reduce product yields.
Controlling electrostatic discharge begins with understanding how electrostatic charge
occurs in the first place. Electrostatic charge is most commonly created by the contract
and separation of two materials. For example, a person walking across the floor
generates static electricity as shoe soles contact and then separate from the floor
surface. An electronic device sliding into or out of a bag, magazine or tube generates an
electrostatic charge as the device’s housing and metal leads make multiple contacts and
separation with the surface of the container. While the magnitude of electrostatic charge4
may be different in these examples, static electricity is indeed generated.
How Material Characteristics
Affect Static Charge
Discharge From The Device
The transfer of charge from an ESDS device is also an ESD event. Static
charge may accumulate on the ESDS device itself through handling or contact with
packaging materials, work surfaces, or machine surfaces. This frequently occurs
when a device moves across a surface or vibrates in a package. The model
used to simulate the transfer of charge from an ESDS device is referred to as the
Charged Device model (CDM).
14
Summary
In this introductory article on electrostatic discharge, we have discussed the
basics of electrostatic charge and discharge, types of failures, ESD events, and device
sensitivity. We can summarize this lesson as follows:
1.
Virtually all materials, even conductors, can be triboelectrically charged.
2.
The level of charge is affected by material type, speed of contact and
separation humidity, and several other factors.
17
What Voltage Levels Are Generated If ESD Is Not Controlled?
How Is ESD Controlled?
21
It Can Be Controlled By Materials
ESD Protected Products
Best Practice Remove Insulator or Change to ESD Version
● ESD Garments and Gloves
● Conductive Foam & Shunt Bars
● Dissipative Binders & Document Protectors
● Conductive & Dissipative Flooring
● ESD Packaging, bags, boxes, etc.
● Antistatic or Low Charging Tape
● ESD Carpeting, Tiles, etc.
● Dissipative Floor Finishes
22
ESD Protected Work Station
An ESD Protective Workstation Is An Area That Has Been Established To
Effectively Control Electrostatic Charges
●
Grounding All Conductors (Including People)
●
Removing All Insulators
●
Or Neutralizing Process Essential Insulators With An Ionizer
Your Are On The Front Lines Fighting The Hidden Enemy
Quick Aviation Consultants Control Area ESD Work Station Minimum
Requirements
●
Make Sure Ionizers Are Maintained And Air Flow Directed At ESDS
●
Use Shielded Packaging For Shipping Or Storing ESD Sensitive
Items Outside the ESD Protected Area
●
Only Allow Trained or Escorted People at ESD Workstation
●
Test Wrist Straps At Least Daily, Or Use Continuous Monitors
23
Quick Aviation Consultants (QAC) 3M Model 724 ESD Work Station
3M Model 724
Work Station
Monitor
QAC ESD Work
Station
25
Page
Safety Information …………………………………………………………3
1. Theory of Operation ………………………………………………….4
2. Installation of 3M Model 724 Monitor with Work
Surface Ground Monitoring ……….………………………………8
3. Installation of Model 724 Monitor without Work ……………….8
Surface Ground Monitoring ………………………………………..9
4. Selection of Test Voltage and Resistance Limit ……………….12
5. Mounting the 724 Monitor and 3M Model 732 Remote ………...12
6.
Wrist Strap Connection ……………………………………………..13
7. Fault Conditions ………………………………………………………14
8. 3M Model 3057 Standby Jack …………........................................15
9. 3M Model 733 Dual Conductor Remote Input Jack .………...….15
10. Installation of Model 733 Remote ……………………………….....15
11. Verification Procedure for the Model 724 Monitor ……………..16
12. Specifications …………………………………………………………19
13. Parts Included ………………………………………………………...19
14. Required Accessories and Optional Available Parts …………..20
15. Additional Wrist Strap Monitoring Information ……..……………20
16. Warranty ………………………………………………………………..21
2
27
QUESTIONS
4
29
QUESTIONS
9
34
QUESTIONS
14
39
QUESTIONS
16
41
QUESTIONS
21
46
QUESTIONS?
48
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
WORKBOOK HAND OUT
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO. 00191
WORKBOOK HAND OUT
NAME: _________________________________
DATE: __________________
TRAINING PRESENTED BY: ________________________________________________
1
Rev 0 Date 10/14/2009
About ESD
Background
Most people only think of static electricity as the shock from touching a metal doorknob after walking
across a carpet. However, static discharge can be very dangerous in modern work environments. Electronic
devices have become more sensitive to static discharge as they have become faster and smaller. ESD impacts
productivity and product reliability in almost every aspect of today electronics environment. Electrostatic
control also applies to other industries such as clean room applications and graphic arts.
ESD affects manufacturing cost, product quality, production yields, product reliability, and profitability.
Experts have estimated the average product losses due to static to be from 8-33%. This could quantify the
amount lost due to ESD, or electro-static discharge, to be in the billions ever year. Whether it is the cost of a
damaged diode which may only cost a few cents or a complex hybrid which could run a company several
hundred dollars, the threat of ESD is growing concern. Other loses due to ESD could be costs of repair and
rework, re-shipping, extra labor.
ESD On Systems
Any Electronic Equipment Can Be Damaged By ESD
Creating A Static Electricity Charge
Static electricity is an electrical charge caused by an imbalance of electrons on a surface. This
imbalance creates a measureable electric field that can influence other objects at a distance. Electrostatic
discharge is the transfer of charge between bodies at different electrical potentials.
Electrostatic discharge can change the electrical characteristics of a semiconductor device, degrading
or destroying it. Electrostatic discharge also may upset the normal operation of an electronic system, causing
equipment malfunction or failure. Another problem caused by static electricity occurs in clean rooms.
Charged surfaces can attract and hold contaminants, making removal from the environment difficult, When
attracted to the surface of silicon water or a device’s electrical circuitry; these particulates can cause random
water effects and reduce product yields.
2
Rev 0 Date 10/14/2009
Controlling electrostatic discharge begins with understanding how electrostatic charge occurs in the
first place. Electrostatic charge is most commonly created by the contract and separation of two materials.
For example, a person walking across the floor generates static electricity as shoe soles contact and then
separate from the floor surface. An electronic device sliding into or out of a bag, magazine or tube generates
an electrostatic charge as the device’s housing and metal leads make multiple contacts and separation with
the surface of the container. While the magnitude of electrostatic charge may be different in these examples,
static electricity is indeed generated.
How Material Characteristics Affect Static Charge
Discharge From The Device
The transfer of charge from an ESD device is also an ESD event. Static charge may accumulate on the
ESD device itself through handling or contact with packaging materials, work surfaces, or machine surfaces.
This frequently occurs when a device moves across a surface or vibrates in a package. The model used to
simulate the transfer of charge from an ESD device is referred to as the Charged Device model (CDM).
3
Rev 0 Date 10/14/2009
Summary
In this introductory article on electrostatic discharge, we have discussed the basics of electrostatic
charge and discharge, types of failures, ESD events, and device sensitivity. We can summarize this lesson as
follows:
1. Virtually all materials, even conductors, can be triboelectrically charged.
2. The level of charge is affected by material type, speed of contact and separation humidity, and
several other factors.
4
Rev 0 Date 10/14/2009
What Voltage Levels Are Generated If ESD Is Not Controlled?
How Is ESD Controlled?
5
Rev 0 Date 10/14/2009
ESD Protected Products
Best Practice Remove Insulator or Change to ESD Version
●
ESD Garments and Gloves
●
Conductive Foam & Shunt Bars
●
Dissipative Binders & Document Protectors
●
Conductive & Dissipative Flooring
●
ESD Packaging, bags, boxes, etc.
●
Antistatic or Low Charging Tape
●
ESD Carpeting, Tiles, etc.
●
Dissipative Floor Finishes
6
Rev 0 Date 10/14/2009
ESD Protected Work Station
An ESD Protective Workstation Is An Area That Has Been Established To Effectively Control
Electrostatic Charges
●
Grounding All Conductors (Including People)
●
Removing All Insulators
●
Or Neutralizing Process Essential Insulators With An Ionizer
Your Are On The Front Lines Fighting The Hidden Enemy
Quick Aviation Consultants (QAC) Control Area ESD Work Station Minimal Requirements
●
Make Sure Ionizers Are Maintained And Air Flow Directed At ESDS
●
Use Shielded Packaging For Shipping or Storing ESD Sensitive Items Outside
the ESD Protected Area
●
Only Allow Trained or Escorted People at ESD Workstation
●
Test Wrist Straps At Least Daily, or Use Continuous Monitors
●
Test ESD Footwear At Least Daily, If Used
7
Rev 0 Date 10/14/2009
Quick Aviation Consultants (QAC) 3M Model 724 ESD Work Station
3M Model 724
Work Station
Monitor
QAC ESD Work
Station
Page
Safety Information ......................................................... 3
I. Theory of Operation ................................................. .4
2. Installation of 3M Model 724 Monitor with Work
Surface Ground Monitoring ……….…………………………..8
3. Installation of Model 724 Monitor without Work ……8
Surface Ground Monitoring ……………………………………..9
4. Selection of Test Voltage and Resistance Limit ……….12
5. Mounting the 724 Monitor and 3M Model 732 Remote ….12
6. Wrist Strap Connection ……………………………………………13
7. Fault Conditions ……………………………………………………….14
8. 3M Model 3057 Standby Jack .......................................I5
9. 3M Model 733 Dual Conductor Remote Input Jack .…..15
10. Installation of Model 733 Remote ……………………………..I5
11. Verification Procedure for the Model 724 Monitor …….16
12. Specifications ……………………………………………………………..19
8
Rev 0 Date 10/14/2009
9
Rev 0 Date 10/14/2009
10
Rev 0 Date 10/14/2009
11
Rev 0 Date 10/14/2009
12
Rev 0 Date 10/14/2009
13
Rev 0 Date 10/14/2009
NOTES & QUESTIONS
PAGE 1 OF 3
14
Rev 0 Date 10/14/2009
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
QUIZ
ABOUT ELECTROSTATIC DISCHARGE SENSITIVE DEVICES
TRAINING COURSE NUMBER 00191 QUIZ
1.)
2.)
3.)
(4.)
(5.)
(6.)
What do most people think of static electricity?
(a)
Lighting strikes.
(b)
Flashing from overhead power lines.
(c)
As the shock from touching a metal doorknob after walking across a carpet.
(d)
All the above.
Experts have estimated the average product losses due to static to be from eight (8) to thirty (30)
percent.
(a)
True.
(b)
False.
Static electricity is an electrical charge cause by an imbalance of electrons on a surface.
(a)
True.
(b)
False.
What is known as “triboelectric charging”?
(a)
Imbalance creates a measureable electric field.
(b)
Transfer of electrons between materials.
(c)
Creating electrostatic charge by contact and separation of materials.
(d)
Both A and B.
An electrostatic charge may be created on a material in other ways by what means?
(a)
Induction.
(b)
Ion bombardment.
(c)
Contact with another charged object.
(d)
All the above.
Once a charge is created on a material, it becomes an “electrostatic” charge (if it remains on the materials)
(a)
True.
(b)
False.
1
ABOUT ELECTROSTATIC DISCHARGE SENSITIVE DEVICES
TRAINING COURSE NUMBER 00191 QUIZ
(7.)
(8.)
(9.)
(10.)
(11.)
Virtually all materials can be triboelectrically charged including?
(a)
lead.
(b)
water and dirt particles in the air.
(c)
carbon.
(d)
All of the above.
What is insulative material?
(a)
Foam particles.
(b)
Packing materials.
(c)
Bubble wrapping.
(d)
A material that prevents or limits the flow of electrons across its surface or through its volume is
called an insulator.
Insulative material is a material that prevents or limits the flow of electrons across its surface or through
its volume and is called an insulator.
(a)
True.
(b)
False.
What is known as triboelectric charging?
(a)
Conductive objects brought into the vicinity of this electric field.
(b)
The absence of electrons at the positively charged.
(c)
Creating electrostatic charge by contact and separation of materials.
(d)
When attracted to the surface of silicon water.
What is the Human Body Model (HBM)?
(a)
A similar discharge can occur from a charged conductive object, such as a metallic tool or
fixture..
(b)
Simple contact of a finger to the leads of an ESDS device or assembly allows the body to
discharge, possibly causing device damage.
(c)
A transfer of charge from an ESDS device is referred to as an HBM.
(d)
All the above.
2
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
ANSWER SHEET
ABOUT ELECTROSTATIC DISCHARGE SENSITIVE DEVICES TRAINING
COURSE NUMBER 00191 ANSWER SHEET
1.)
C
2.)
B
3.)
A
4.)
C
5.)
D
6.)
A
7.)
B
8.)
D
9.)
A
10.) C
11.) B
12.) D
13.) C
14.) A
15.) D
16.) B
17.) B
18.) A
19.) C
20.) A
21.) D
1
ELECTROSTATIC DISCHARGE
SENSITIVE DEVICES TRAINING
COURSE NO: 00191
TRAINING FORM 205
RECORD OF EMPLOYEE TRAINING
Trainee:
Title:
(Print)
Trainee:
Certificate Number:
(Signature)
Training Location:
Quick Aviation Consultants Conference Room
Date(s) of Training:
Method:
Total Hours:
OJT:
Classroom:
Other:
Test: Yes:
No:
N/A:
√
√
Practical Test
'3.0
√
(Record Type)
Training Description:
Electrostatic Discharge Sensitive Devises (EDSD's)
Training Course Number 00191.
OBJECTIVE: To train all personnel on Electrostatic Discharge Sensitive Devices and
proper use of EDSD work stations.
Note: This form to be filled out and maintained with the employee training records.
Signature of Trainer verifying training described above.
Trainer:
(Print)
Trainer :
Date :
(Signature)
FAA Certified Repair Station No. XXXXXXXX
6800 S.W. 58th Court, Davie, FL 33314-7009
FORM 205R4
03/12/2007