* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Document
Survey
Document related concepts
Electrical engineering wikipedia , lookup
Electronic engineering wikipedia , lookup
Opto-isolator wikipedia , lookup
Voltage optimisation wikipedia , lookup
Alternating current wikipedia , lookup
History of electric power transmission wikipedia , lookup
Earthing system wikipedia , lookup
Surge protector wikipedia , lookup
Stray voltage wikipedia , lookup
Portable appliance testing wikipedia , lookup
Automatic test equipment wikipedia , lookup
Mains electricity wikipedia , lookup
Electroactive polymers wikipedia , lookup
Transcript
ESD Control Flooring Presented By: Erik S. Van Anglen Technical Sales Specialist ESD Sika Industrial Flooring Lyndhurst, NJ Polymer ESD Flooring ? Why ESD Flooring? What Are the Problems? Where is the Market? What Products Are Available? What’s the Future? What Is Static Electricity? Static Electricity Static Electricity: An Electrical Charge at rest ESD: The transfer of static charges between bodies or objects at different electrical potentials. This may be caused by either direct contact or by induction of an electrostatic field. Static Electricity Tribocharging: The generation of electrostatic charges when two materials make contact or are rubbed together, then separated Static Electricity & The Atom All matter consists of a collection of atoms The “atom” is comprised of a nucleus containing - + Protons and Neutrons - Orbiting the nucleus are Electrons The atom is normally electrically neutral (same # of +protons = # of -electrons) + Contact and Separation of Materials Causes Electron Imbalance Negative Charge + Positive Charge Negative Electron Strips to Another Atom Simply put, ESD discharge is the sudden and violent redistribution of free electrons between objects or to a conductor. Static Electricity in an EPA Factors that Influence Tribocharging Intimacy of Contact Speed of Separation Conductivity of Materials Triboelectric Series Position Relative Humidity Characteristics of Material Charge Triboelectric Series Chart Positive + Increasing + Neutral Increasing - Negative - From Neutral, the further apart the two materials appear on this chart, an increasing amount of tribocharging most likely will result upon separation Put Static Voltage in Perspective Electrostatic Voltage Scale for Various Actions Means of Generation Walking on Carpet Walking on Vinyl Working at Bench Poly Bag Picked up at Bench Work Chair Padded with Foam Walking on Standard Epoxy Floor Walking on performance ESD Floor with Proper Footwear Electrostatic Voltage 10 - 20%RH 35,000 12,000 6,000 20,000 18,000 20,000 <15 65 -90% RH 1,500 250 100 1,200 1,500 10,000 <15 ESD Events in the Workplace A Word about People & Electrostatic Voltage Over 3,000 Volts Needed on Body to “Feel” Electrostatic Discharge Painful discharges occur > 10,000 volts Rarely can a person have >30,000 Volts on body Many Devices have a damage threshold far below 3,000 volts Some Devices are sensitive well below 100 volts GMR Heads are sensitive below 10 volts ESD Protection Electronics Industry Static Electricity Static Electricity Damages Electronic Components by Overstressing Microscopic Connections Failure Analysis (HBM) Human Body Model (MM) Machine Model Failure Analysis (CDM) Charged Device Model Static Electricity Failures Associated with ESD Events Latent Failure: Damaged component, not evident until after product has been shipped Catastrophic Failure: Component is damaged immediately Static Electricity Component Sensitivity Human Body Model Class 0 Class 1 Class 2 Class 3 Class 4 0 to 199 Volts 200 to 499 Volts 500 to 1999 Volts 2000 + Volts Not ESD Sensitive Through extensive failure analysis, components have been classified as to their ESD sensitivity ESD Events in the Workplace (HBM) Human Body Model ESD Event (CDM) Charged Device Model (FIM) Field Induction Model (MM) Machine Model Human Body Model HBM ESD Occurs When Charged Person Touches Device Machine Model MM Occurs When Sensitive Device Comes In Contact With Charged Surface. Worst-Case Scenario of HMB Field Induction Model FIM Field Induction Events Occur When ESD Sensitive Devices Are Placed Within Electrostatic Field and Are Momentarily Grounded. Charged Device Model CDM Charged Device Events Occur When Charged, ESD Sensitive Devices Come Into Contact With Conductive Surfaces “The Problem” The “Problem” with a Difference in Potential By nature, an electrostatic field will always seek ground first. Differences in Electrical Potential Will Always Be Equalized ESD Protection against Fire or Explosion from Ignition Chemical Plants Pharmaceutical Plants Munitions/Defense/Military Installations Energy Producing Products (Airbags, Gases) Dry Goods Milling Operations Printing Plants Any Process Susceptible to Damage by Ignition Ignition Source < 3000v ZAP or ESD The rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic field. Usually, the charge flows through a spark between two bodies at different electrostatic potentials as they approach one another. (from ESD-ADV1.0-1994) ESD, or Zap, is occurs when there is a difference in the amount of electrons between two sources. Energy Transfer = Ignition Source 3,000 Volts = 0.5 Millijoules (mj) of Energy Propane within Explosive Concentration Range (LEL/UEL 2.15% - 9.6%) Requires Only 0.25 mj to Ignite “The Problem” Definition of Ground (1) A conducting connection, whether intentional or accidental between an electrical circuit or equipment and the earth, or to some conducting body that serves in place of earth. (2) The position or portion of an electrical circuit at zero potential with respect to the earth. (3) A conducting body, such as the earth or the hull of a steel ship, used as a return path for electric currents and as an arbitrary zero reference point. (from ANSI/EOS/ESDS6.1-1991) (from ANSI/EOS/ESD-S6.1-1991) Electronics Standards ANSI/ESD S20.20-2007 Electrostatic Discharge Control Program for Protection of Electrical and Electronic Parts, Assemblies and Equipment MIL-1686C IEC 61340-5-1 & 2 These are process documents, not test standards Electronics Standards NEW ANSI/ESD ASSOCIATION STANDARD S20.20-2007 <3.5 x 10e7 ohms resistance <100v body voltage generation BVG Combination of ESD STM97.1 & ESD STM97.2 “The plan shall contain the specific requirements for the organization and be evolutionary as technologies, processes or procedures change.” (More sensitive ESD items = Lower BVG Requirements) A Requirement for Third-Party ISO9000 Facility Certification After 2009! Electronics Standards NEW ANSI/ESD ASSOCIATION STANDARD S20.20-2007 Association Documents to Prevent Fire and Explosion NFPA-77 Recommended Practice on Static Electricity NFPA-99 Standard For Health Care Facilities UL-779 Electrically Conductive Flooring Test Methods for ANSI Compliance Testing Equipment Ohms Meter Voltage Meter Charged Plate Monitor Qualification Test Method Testing Methods EOS/ESD STM S7.1-2006 ASTM F-150 An up to date test method for the measurement of electrical resistance of floor materials both point to point and point to ground. Results are reported in ohms of resistance Test Methods for ANSI Compliance and Quality Control Testing Methods Various Methods of testing have been developed to measure the effects of static and discharge on sensitive components and for purposes of preventing fire or explosion. Point-to-Point Resistance EOS/ESD-S7.1-Rev. 2006 Minimum 5 tests per 5000 square feet Megohmeter with a minimum range of 10e5 to 10e11 ohms. 5 lb. Conductive Rubber electrode set to 3 feet apart Test voltage set at 10 or 100 volts Resistance to Ground EOS/ESD-S7.1-Rev. 2005 Minimum 5 tests per 5000 square feet Megohmeter with a minimum range of 10e5 to 10e11 ohms. 5 lb. Conductive Rubber electrode. Other lead connected to earth ground. Test voltage set at 10 or 100 volts Performance Test Method Testing Methods EOS/ESD STM 97.1 An up to date test method for the electronics industry that measures Floor Materials and Footwear-Resistance Measurement in combination with a Person Results are reported in ohms of resistance Floor Materials and Footwear-Resistance Measurement in Combination with a Person ESD STM 97.1-2006 Similar to Resistance to Ground test, but incorporates the human body model with ESD footwear. Performance Test Method Testing Standards ESD STM 97.2 The most important performance test of any ESD control floor system Floor Materials and Footwear-Voltage Measurement in Combination with a Person Established Test Method for the measurement of the Voltage on a Person in combination with Floor Materials and static control Footwear, shoes or other devices. In a given Application? “How does it Perform” BVG Vs. Resistance Qualification Tests Testing Materials vs. Testing Performance Performance Test Methods Importance of Testing Body Voltage Generation (BVG) ANSI/ESD S20.20-2007 Method 2 <100Volts (BVG) Some Smart Phones Contain a (BVG) Susceptible Chip <25 v GMR’s May Be Susceptible to <10 Volts. Floor Materials and Footwear-Voltage Measurement in Combination with a Person ESD STM 97.2-2006 Requires a “Charged Plate Monitor” Works in conjunction with proper ESD footwear. S 97.2 Body Voltage Utilizes a “Step” Pattern to Simulate Walking Floor Materials and Footwear-Voltage Measurement in Combination with a Person ESD STM 97.2-2006 Chart Indicates Less Than 15 Volts BVG While Walking Through “Step Cycle” ESD Solutions A ESD floor can tie your customer’s entire ESDControl program together “Let’s take a Look” Available Product Solutions Bare Concrete + Conductive (<25,000 ohms) - Appearance - Dusts - Wears - Is Not Uniformly or Consistently Conductive ESD Waxes/Sealers + Effective temporarily - requires routine re-application Available Product Solutions ESD Floor Mats + Very uniform ESD characteristics + Aesthetic appearance - Require Positive Grounding Point - Won’t take heavy point loads - Only Work in Local Area Available Product Solutions Tile/Sheet Goods + Very uniform ESD characteristics + Aesthetic appearance - Requires Routine Maintenance - Won’t take heavy point loads - Relatively high installed cost Available Product Solutions Rubber Sheet + Good Choice for Cleanrooms + Overall Cost Effectiveness - Initial Expense - Point Load Resistance Carpet Unsuitable for Industrial Environment ESD Polymer Flooring + Seamless + Corrosion Resistant + Relatively Rapid Installation + Relatively Low Initial Cost, Ideal For Leaseholds + Will Resist Point Loading + Very Wide Variety of Colors & Finishes Drawbacks… - Aesthetics of Liquid Applied Coating - Limited by Same Drawbacks of All Epoxy/Urethane Flooring • Water Vapor Emissions • Concrete Condition Quality-Control ESD Criteria for Choosing Polymer ESD-Control Flooring Performance (BVG) Physical Properties (Durability) Aesthetics Ease of Repair Relative Cost What types of ESD Polymer Flooring Are On The Market? Particulate Systems Quartz Systems Heavy Duty Systems Epoxy Urethane Novalac-Epoxy Water Base Static Dissipative Conductive ESD - Various Requirements/Materials The Right Floor For The Job Particulate Based ESD Flooring System with ground plane offers even distribution of ESD protection throughout the thickness of the floor ADVANTAGES Very low BVG values ( ESD particulate floors can be below 15 volts) Wear Layer is Electrically Reactive 100% Solids Epoxy or Low VOC Urethanes Very easy and economical to repair The primers and intermediate coats can be pigmented the same color Variety of Finishes and Colors Particulate Based ESD Flooring ADVANTAGES Functions independent of humidity Cost-effective Easy to install and maintain Most Consistent Dissipation Static Dissipative Systems Insulating Primer Conductive Epoxy Primer ESD Conductive System ESD Topcoat Conductive Primer Insulative Primer Concrete Substrate Conductive Primer Insures High Conductivity, Uniformity of Ground Plane Static Dissipative Systems Insulating Primer Electrostatic Dissipative System ESD Topcoat Insulative Primer Concrete Substrate Insulating primer from substrate to prevent unreliable substrate ranges from insulative to very conductive due to moisture content of concrete near surface. Fiber Based Epoxy ESD Systems Generally Thicker Systems Depend on Uniform Distribution of Carbon Fiber Sensitive to Application Methods Fiber Top Coat Conductive Primer Insulative Primer Typical Fiber Wear Layer Floor Electrical Performance Fiber-Based Epoxy ESD Design Properties Older Technology Non Aligning Wear Layer for Re-coatability More Dependent on Relative Humidity Prone to Inconsistent Electrical Properties More Dependent on Applicator’s Skills Particulate Based ESD Flooring Epoxy ESD Control Flooring Features <15 Volts BVG Possible Conductive range (2.5 x 10e4 to 1.0 x 10e6 ohms)* Static Dissipative Range (1.0 x 10e6 to 1.0 x 10e9)* Dissipate a 5,000 volt charge to 0 in less than 0.1 seconds Maintains Conductivity throughout the entire thickness of system Abrasion, impact and chemical resistant * - Per EOS/ESD Standards Technological Trends Over Time Technological Trends “Smaller and Faster Concept” In time, Integrated circuitry has become powerful and faster with each innovation The results will be smaller and more convenient products for the consumer Technological Trends Moore’s Law: The Capacity of Electronic Devices Doubles Approximately Every Two Years In 1995 the 64-bit Processor Had 9.3 Million Transistors By 2001 the State-of-The-Art Processor had 40 Million Transistors By 2015 Expected to Have 15 Billion By 2020, Will Be in Molecular Scale Production, Positioning Individual Molecules Technological Trends What Does the Future Hold? Electronic chip sensitivity thresholds and manufacturing procedures create the need for superior ESD protection both now and in the future. Technological Trends Electrostatic Discharge (ESD) Technology Roadmap With devices becoming more sensitive through the year 2010, it is imperative that companies begin to determine the ESD capabilities of their handling processes. For people handling ESD sensitive devices, personnel grounding systems must be designed to limit body voltages to less than 100 volts, and in many cases less. To protect against Machine Model ESD discharges, all conductive elements that contact ESD sensitive devices must be grounded. Finally, to limit the possibilities of a field induced CDM ESD event, users of ESD sensitive devices should ensure that the maximum voltage induced on their devices is kept below 50 volts. Copyright © 2005 ESD Association ESD Flooring as Part of an Electrostatic Discharge Control Program ESD-Control Flooring Remember That ESD Flooring Is Only One Component of a Complete System Testing and Connecting Devices Traditional ESD Protection Grounded Benches Wrist Straps Air Ionizers Heel Straps ESD Footwear These alone are not enough! ESD-Control Flooring The Floor Ties The ESD System Together Static Electricity How Much Are Static Losses Costing Your Customer? As High as 10% of Annual Revenues Average Negative Impact of 6% More Than $85 Billion Per Year World Wide* Direct Material Loss is Smallest Portion of Total Cost Rework, Burden and Overhead, Warranty and Field Service and Customer Service and Satisfaction Add to the Real Cost *Based on 2001 Industry Study Quality-Control ESD Your Customers Have A Choice! The Incremental Cost of Adding ESD-Control to your Customer’s Facility Floors Will Prove to be one of the Best Decisions They Will Ever Make. Static Electricity Static Control Program Benefits Cost Benefits: Estimates for ESD damage is in the $4 billion range for the US Electronics Industry More reliable products, lower scrap rate Greater customer satisfaction The Largest Generation of Static Electricity in any Workplace is Caused by the Contact and Separation of Floor and Footwear The Floor is the Largest Working Surface in Any Facility Quality-Control ESD Going Beyond the Need for an ESD Floor An ESD-Control flooring system can serve as a sales and marketing tool for your customer when presenting their organization to potential clients. ICRI Fall Convention Flooring Issues Phoenix Arizona Thank You