Since Desco’s start we have been dedicated to manufacturing. From the original Circuitracer to our newest ionizer, we are dedicated to making stuff. We have expanded to over 380K square feet of manufacturing space at our factories. We celebrate Manufacturing Day and all the companies and people who spend their days making stuff.
1. Define what you are trying to protect.
What is the Human-Body Model (HBM) withstand voltage of the most sensitive item? A prerequisite of ESD control is the accurate and consistent identification of ESD susceptible items. Some companies assume that all electronic components are ESD susceptible. However, others write their ESD control plan based on the device and item susceptibility or withstand voltage of the most sensitive components used in the facility. A general rule is treat any device or component that is received in ESD packaging as an ESD susceptible item.
2. Become familiar with the industry standards for ESD control.
A complimentary .pdf of ANSI/ESD S20.20-2014 can be downloaded from the ESD Association web site at www.ESDA.org. Also consider purchasing the ESDA’s ESD Handbook ESD TR20.20-2008.
3. Select a grounding / equipotential bonding system.
The 3rd-wire AC electrical equipment ground is the preferred, recommended ground reference.
4. Determine the method of ground for operators (Personnel Grounding).
The two options for grounding an operator are a wrist strap or foot grounders. Wrist straps must be worn if the operator is seated. If foot grounders are used, an ESD flooring system must be used. In some cases both wrist strap and foot grounders will be used. The 3rd-wire AC electrical equipment ground is the preferred, recommended ground reference.
5. Establish & Identify EPA(s) – ESD Protected Area(s).
ESD Control Plans must evolve to keep pace with costs, device sensitivities, and the way devices are manufactured. Define the departments and areas to be considered part of the ESD Protected Area. Consider if customers and/or subcontractors should be included. Implement access control devices, signs, and aisle marking tape to identify and control access to the ESD Protected Area(s).
6. Select ESD control items to be used in the EPA based on your manufacturing process.
7. Develop Packaging (Materials Handling & Storage) Plan.
When moving ESD susceptible devices outside an ESD protected area, it is necessary for the product to be packaged in an enclosed ESD Shielding Packaging.
8. Use proper markings for ESD susceptible items, system or packaging.
From ANSI/ESD S20.20-2014 section 8.5: “the Organization, in developing the ESD Control Program Plan, shall consider the need for marking.”
9. Implement a Compliance Verification Plan.
From ANSI/ESD S20.20-2014 section 7.4: “A Compliance Verification Plan shall be established to ensure the Organization’s fulfillment of the technical requ.rements of the ESD Control Program Plan”.
10. Develop Training Plan.
From ANSI/ESD S20.20-2014 section 7.2: “Initial and recurrent ESD awareness and prevention training shall be provided to all personnel who handle or otherwise come into contact with any ESDS items.”
11. Make the ESD Control Plan part of your internal quality system requirements.
A written ESD Control Plan provides the “rules and regulations”, the technical requirements for your ESD Control Program. This should be a controlled document, approved by upper management initially and over time when revisions are made. The written plan should include following:
- Qualified Products List (QPL) – A list of EPA ESD control items is used in the ESD control Plan
- Compliance Verification Plan- Includes periodic checking of EPA ESD control items, and calibration of test equipment per manufacturer and industry recommendations.
- Training Plan- An ESD Program is only as good as the use of the products by personnel. When personnel understand the concepts of ESD, the importance to the company of the ESD control program, and the proper use of ESD products, they will implement a better ESD control program improving quality, productivity, and reliability.
All US based Desco Industries locations will be closed on Monday September 7, 2015 in observance of the Labor Day Holiday. Customer service, production, shipping, and all other departments will be closed. No orders will be processed for the day. Normal operations will resume on Tuesday September 8, 2014.
We thank you for being a valued customer of Desco Industries. Our staff would like to wish you a safe and happy Labor Day weekend.
The 37th Annual EOS/ESD Symposium and Exhibits will be held at the Peppermill Resort Hotel, Reno, Nevada.
Desco has been a part of the ESD Symposium for nearly 30 years. Desco employees have volunteered their time to be a part of the ESD Association’s standards meetings, working groups, and other functions at the annual symposium. Desco will also have a booth in the exhibits area again this year.
Dates – September 27 – October 2, 2015 with Exhibits opened from Monday, September 28th at 5:00 p.m. closing Wednesday, September 30th at 1:30 p.m.
Lodging reservations can be made by calling the toll-free reservations line at 1-800-282-2444 (reference group code AELEC15).
A new blog post on the EDN Network titled Static Electricity Aims To Power Wearable Devices discusses how static electricity may be used for energy harvesting to power devices such as fitness bands, medical monitoring systems, and watches.
In addition to the discussion about using static electricity for the energy that it can provide, the post contains some other important information about ESD:
“ESD causes more than one-third of integrated circuit field failures, showing up as leakage, short circuits, burnout, contact damage, gate oxide rupture, and resistor-metal interface damage. As feature sizes shrink, the problem is only getting worse.”
“The cause of electrostatic buildup is the triboelectric effect: material becomes electrically charged after it contacts a different material through friction. Although this is one of the most frequently experienced effects in everyday life, the precise mechanism is still being studied.”
The recent InCompliance article Achieving Perfect ESD Audits for S20.20 ESD Control Programs discusses the ESD Control Plan of General Dynamics Mission Systems facility in Bloomington, MN ESD Control Plan and their ongoing effort to manage the program. The article outlines the program as follows:
- ESD Training Program
- Recurrent ESD Auditing Program
- Changes Made to the Program That Improved Discipline and Audit Results
- 12” rule violations
- Operators Using Defective or Unplugged Constant Monitors
- Stop signs
- Ionizer violations
- Out of date calibration stickers
- Faraday shielding violations
- Repeat violations
- ESD smock violations
- Heel strap violations
- ESD cart violations
- Soldering iron violations
- ESD event monitoring
Managing an ESD Control Plan is all about continuous improvement and continues to become more complicated for manufactures. An ESD Control Plan that improves productivity, quality, and reliability and is flexible enough to accommodate changes and improvements in the manufacturing process is ideal. Factors that must be considered in the long term management of an ESD Control Plan include:
- Value increasing of electronic devices being manufactured
- Devices are increasing in sensitivity to ESD
- Automation and other changes to the manufacturing process
ESD Control Plans must evolve to keep pace with costs, device sensitivities, and the way devices are manufactured in the future. Desco has been working with companies to help manage their ESD Control Plans for over 30 years. Please let us know how we can help make your next ESD audit perfect.
Earlier this month IBM announced that they “have created a “test” chip with transistors 7 nanometers thick.” See the full story HERE
This direction is consistent with the ESD Association’s (www.esda.org) white paper Electrostatic Discharge (ESD) Technology Roadmap – Revised March 2013 which forecasts increased ESD sensitivities stating:
“Also, RF circuit operations will continue to become more prevalent while these pins can tolerate very low capacitive load from ESD cells. Due to these trends, the ICs are expected to become even more sensitive to ESD events in the years 2012 and beyond. Therefore, the prevailing trend will be circuit performance at the expense of ESD protection levels.”
This continuing trend is moving most components used in electronics to Class 0 levels:
0A < 125V
0B 125 to < 250V
The increased sensitivity is encouraging manufactures to increase ESD protective redundancies by:
– Controlling access to the ESD Protected Area
– Adding ESD control items to the ESD control plan
– Continually monitoring the performance of the ESD control items with data acquisition software.
– Increasing the frequency of periodic compliance verification measurements.
For more information on improving an ESD Control Plan see the InCompliance article – Now is the Time for ESD Control Programs to be Improved
All US based Desco Industries locations will be closed on Friday July 3, 2014 in observance of the 4th of July Holiday. Customer service, production, shipping, and all other departments will be closed. No orders will be processed for the day. Normal operations will resume on Monday July 6, 2014.
We wish you a safe and happy 4th of July Holiday weekend.
One of the key groups of products that we manufacture at our Chino, CA location is our testers, monitors and meters. We use a CNC machine to cut holes in the cases where connections are made, LEDs are placed and for other functions relating to the product. Watch a video of a test run HERE
We designed a modular clamping system in-house. We also designed 16 slide bases to be quickly exchanged after being machined without the use of any tools.
Watch a test run on the cases for our Digital Surface Resistance Meters
I once zapped my home’s thermostat when I was attempting to change the temperature setting. The LCD went blank and refused to come back on. I ended up replacing the unit.
While the damage caused by ESD can seem like a mystery, the basic practices of controlling ESD when handling ESD susceptible items are pretty straight forward.
- Establish an ESD Protected Area. It can be one bench or a whole facility.
- Ground all conductors including operators.
- Use a dissipative grounded surface for ESD susceptible products to be placed on if needed.
- Remove all non-process essential insulators from the ESD Protected Area. Use ionization to control charges on process essential insulators.
- If an ESD susceptible item needs to be removed from the ESD Protected Area, place it in a shielding bag or storage container that forms a faraday cage.
Desco has been making products to be used in an ESD Protected Area for over 30 years.