!
MENU
Toggle navigation
Products
Bags and Labels
MIL-PRF-81705E Type III, Class 2
81705 Series Bags with Zipper
81705 Series Bags without Zipper
Statshield® Shielding Bags
Metal-In Standard ESD Shielding Bags
Metal-Out ESD Shielding Bags
Statshield® Moisture Barrier Bags
Moisture Barrier Bags 3.5 Mil
Foil Moisture Barrier Bags 4.0 Mil
High Puncture Moisture Barrier Bags 6.5 Mil
Desiccant Packs
Humidity Indicator Cards
Statfree® Ultra Clear Barrier Bags
Statfree® VPCI-125 HP Bags
VPCI-125 HP Bags without Zipper
VPCI-125 HP Bags with Zipper
Mailer
Labels
Cleanroom Products
Clean Pack Worksurface Mats
Cleanroom Booties
Wrist Straps and Coil Cords
Floor Finish and Maintenance
Dissipative Floor Finishes
Statguard® Dissipative Floor Finish
Statguard® Low-VOC Dissipative Floor Finish
Floor Care Products
Statguard® Floor Stripper
Statguard® Floor Cleaner
Statfree® Spray Buff
Statfree® Burnishing Restorer
Statguard® Floor Label
Education, Awareness, and Accessories
Conductive PCB Edge Protectors
ESD Workstation Cover
ESD Training
Labels
Posters and Signs
Dissipative Binders
Dissipative Document Holders
Aisle Marking Tape
Chair and Cart Covers
Reztore® Antistatic Coating
Floor Mats
Flat
Statfree® G2 Conductive Smooth Rubber
Statfree® CV280
Mat Accessories
Carpet Gripper Tape
Double Sided Adhesive Tape
Aisle Marking Tape
Anti-Fatigue
Statfree® i Conductive Ergonomic Rubber Interlocking Room System
Statfree® S Plus Dissipative Vinyl/Nitrile Anti-Fatigue
Foam
Statfree® Black Cushion Grade Static Dissipative Foam
Statfree® Conductive Foam
Foot Grounders
Full Coverage Foot Grounders
Heel Grounders
Sole Grounders
Stretch Fit Heel Grounders
Disposable Heel Grounders
Economy Heel Grounders
Toe Grounders
Shock Cord Foot Grounders
Grounding Hardware
Common Point Grounds
Bench Mounts
Dome Style
Standard Snap Style
Grounding Hubs
Laminate Grounding
Banana Plug Adaptors
Snaps
Ionization
Single Fan
High Output
Zero Volt Ionizer
Chargebuster™ Plus
Mini
Overhead
Chargebuster™
Chargebuster™ with Lights
Zero Volt Ionizer
Compressed Air
Chargebuster™ Ion Gun
Viper Ion Gun
Ion Python
Pencil Type Ionizer
Ion Bars
Airless
Air Assisted
Controllers
Accessories
Measurement
Resistance Meters
Digital Surface Resistance Meter
Analog Surface Resistance Meter
Surface Resistance Checker
Portable Surface Resistance Probe
Low Resistance Tester
Static Field Meter
Body Voltage Meter
Charged Plate Analyzer
Portable Charged Plate Monitor
ESD Survey Kit
Smocks, Gloves, and Masks
Smocks
Gloves
Cut-Resistant Gloves
Static Dissipative Hot Gloves
ESD Inspection Gloves
Masks
Heavy Duty Poly Cotton ESD Smocks
ESD Pocket Protector
Tape
Wescorp ESD Cellulose Tape with Paper Cores
Wescorp ESD Cellulose Tape with Plastic Cores
Wescorp ESD Conductive Grid Tape
Wescorp Antistatic Hi Temp Masking Tape
Wescorp ESD Hi Temp Polyimide Tape
Wescorp ESD Tape Dispensers
Aisle Marking Tape
Continuous Monitors
Single-Wire Workstation
Mini Monitor
Multi-Mount Monitor
Dual Operator Monitor
Full-Time Monitor
Dual-Wire Workstation
Dual Operator Monitor
Zero Volt Monitor
AC Outlet
Worksurface Mats
Rubber
Statfree® HJ Dissipative Dual Layer Rubber
Statfree® T2 Plus Dissipative Dual Layer Rubber
Statfree® UC2 Dissipative Dual Layer Ultra Clean Rubber
Statfree® J Dissipative Shock Resistant Foam Rubber
Dissipative Dual Layer Rubber
Vinyl
Statfree® Z2 Dissipative 3 Layer Vinyl
Statfree® O Dissipative 3-Layer Vinyl
Statfree® B2 Plus Dissipative 2-Layer Vinyl
Wash Tray Liner
Disposable ESD Mats
Mat Accessories and Cleaners
Carpet Gripper Tape
Double Sided Adhesive Tape
Reztore® Surface & Mat Cleaner
Field Service Kits
Wrist Straps and Coil Cords
Single-Wire Wrist Straps & Coil Cords
Jewel® Elastic Adjustable Wrist Straps
Jewel® MagSnap® Wrist Straps
Premium Metal Expansion Wrist Straps
Ultra-Light Metal Expansion Wrist Straps
Elastic Adjustable Wrist Straps
Hook and Loop Wrist Straps
MagSnap® Wrist Straps with Right Angle Banana Plugs
Economy Wrist Straps
Disposable Wrist Straps
Coil Cords
Dual-Wire Wrist Straps & Coil Cords
Coil Cords
MagSnap® 360™
Jewel® Dual-Wire MagSnap® Wrist Straps
Jewel® Dual-Wire Metal Expansion Wrist Straps
Dual-Wire Metal Expansion Wrist Straps
Dual-Wire Adjustable Elastic Wrist Straps
Dual-Wire Wrist Straps with 7mm Snaps
Personnel Grounding Testers
Wrist Strap
Touch Tester
Portable Wrist Strap Tester
AC Outlet Analyzer and Wrist Strap Tester
Wrist Strap and Footwear
Combo Tester
Combo Tester X3
Closeout Items – Save 30%+
Closeout Ionizers
Closeout Smocks
Closeout Wrist Straps
Closeout Test Equipment
Closeout Coil Cords
Closeout Foot Grounders
Closeout Labels and Signs
Closeout ESD Shielding Bags
Closeout Mats and Ground Cords
Closeout Workstation Pouches and Document Holders
What's New
Blog
Distributors
Resources
Videos
Webinar
REGISTER / LOGIN
SHOP
RPL
CART (
0
)
SUBSCRIBE TO OUR EMAIL LIST - Be the first to know
about exclusive deals, tips, new products & more!
Questions And Answers
#
337
List All Questions
Search
List by Category
Question
Question 1: What precautions are being taken to eliminate corrositivity and contamination of ESD-sensitive goods through the transport of control bags? Question 2: Is air ionization an effective way to neutralize static charges on the surfaces of insulators by means of corona discharge? Does time play a factor in the amount of air volume that can be ionized? If so, what procedures can be taken to speed up the movement of the ions? - Fred Franklin, The Electrostatic Discharge Magazine,
Answer
A1.ESD Sensitive (ESDS) devices, say populated onto a printed circuit board (PCB), may have components that are also humidity sensitive. Only by using completely sealed ESD protective packaging can you properly protect the PCB from ESD. By using a shielded ESD protective bag and heat sealing the opening will you protect the ESDS contents from all types of ESD. If the metal layer in the shielding bad is thick enough, as it is in moisture vapor barrier (MVB) shielding bags, then you can also protect the contents (again assuming that you properly heat seal the opening) from excessive moisture content, e.g., corrosion of metal contacts and other moisture sensitive parts. Contamination is another issue and may be related to materials that must maintain some level of cleanliness or minimized exposure to airborne particulates. Another issue are older technology pink poly bags which may have topical treatments that can outgas within the bad causing contamination. Most of today's materials in packaging are more stable but should be evaluated if outgassing or other forms of contamination are of concern. A2. Air ionization is one solution to minimize charge accumulation on insulators (since you can't ground or remove charges on non-conductive materials). Corona discharge is one of the most common mechanisms to initiate air ionization. Depending on the technology used (AC, DC, pulsing DC) in corona discharge you can achieve various levels of efficiency of ionization to energy input. There are advantages to each type of technology, AC typically yields better balancing and DC better feedback controls. Another big factor in output is the carrier or air fan and its air flow (cubic feet per minute (CFM). To increase the ion flux, you would want to create a large density of ions in balance (both + and - air ions) by minimizing recombination and collection from the circuit. Air movement helps tremendously in carrying the air ions to the critical areas (ESD protective areas). To get the most out of your air ionizer, remember to keep the air flow and work area unobstructed, minimize the distance between the ionizer output and the work area, employ high output fans, and keep the emitters clean. Depending on the manufacturers unit and how it is setup, you can achieve decay times of less than 3 seconds within the protected coverage areas.
Related Categories:
Industrial ESD
If you have found this Q/A useful, please rate it based on its helpfulness.
This question has been rated:
(
100
% at
1
Ratings)