Conformity Magazine - October 2008 - (Page 19)

ESD Open Forum References 1. 2. ANSI/ESD STM-5.3.1-Charged Device Model (CDM)— Component Level, ESD Association, Rome, NY. Henry et al. “Charged Device Model Metrology,” EOS/ESD Symposium, 1996, EOS-18. p167. www.esda.org. About the Author This month’s ESD Open Forum column was prepared on behalf of the ESD Association by Dr. Leo G. Henry, an IEEE Senior member. He is a member of the ESDA’s Board of Directors, and serves as Vice President. He is chair of the Device Design Certification Program, and is also chair/ facilitator for the ESDA’s Device Testing Standard Committee (WG-5.0). Dr. Henry is presently the chief engineer at ESD/ TLP Consultants LLC, located in Fremont, CA. He earned B.S. and M.S. degrees in Physics from the University of the West Indies, and M.S. & PhD degrees in Materials Science & Engineering from the University of California, Berkeley. He can be reached at 510-657-5252 (office) or 510-708-5252 (mobile), and at leogesd@pacbell.net or leogesd@ieee.org. About the ESD Association Founded in 1982, the ESD Association is a not for profit, professional organization dedicated to furthering the technology and understanding of electrostatic discharge. The Association sponsors educational programs, develops ESD standards, holds an annual technical symposium, and fosters the exchange of technical information among its members and others. Additional information may be obtained by contacting the ESD Association, 7900 Turin Rd., Bldg. 3, Rome, NY 13440-2069 USA, Phone: 315-339-6937, Fax: 315-339-6793, Email: info@esda.org, Website: www.esda.org. © Bram Janssens | Dreamstime.com of a ceramic-filled polymeric substrate, to have much lower moisture absorption rate than the FR-4 material. Therefore, the Rf-35 is preferred, but it is optional to use either one. . It is to be noted that, if the user plans to build their own module, then changes to the materials dielectric constant will change the required dimensions (shown in the standard) if the specified capacitances are to be maintained. The physical dimensions given in the standard are meant to be a guide only. The final capacitance of the verification modules are to be measured using the specified capacitance meter. Charge Voltage Volts ± 5% 125 250 500 1000 1500 2000 Symbol Ip1 Ip1 Ip1 Ip1 Ip1 Ip1 4 pF +/- 5% Verification Module Amperes ± 20 % 1.13 2.25 4.50 9.00 13.50 18.00 30 pF +/-5% Verification Module Amperes ± 20% 14.00 Table 2: Requirements for 1.0 GHz BW measurement oCtober 2008 Conformity 19 http://www.esda.org http://www.Dreamstime.co http://www.esda.org

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Conformity Magazine - October 2008 Contents Editor's Note FCC Releases Annual Report on National Do-Not-Call Registry Commission Cracks Down (for the Fourth Time!) On Junk Fax Marketer FCC Releases Quarterly Reports on Consumer Inquiries and Complaints Greenpeace Ranks Electronics Manufacturers Standards List For The EU’s Energy Consumption Directive Published EU Commission Publishes Standards List for Directives on Pressure Equipment, Pressure Vessels Standards List for the EU’s Medical Devices Directive Available The IEEE Product Safety Engineering Society: The First Five Years ESD Open Forum Improving Election Security and Accuracy: The Future of Voting System Certification Conformity Assessment and Accreditation: Their Role in the Global Market Design Issues in Extreme EMC Environment Focus On... Test Equipment Buyers Guide Product News Updated Standards List for EU Directive on Active Implantable Medical Devices FDA Warns of Effects from CT Scans on Electronic Medical Devices FDA Provides Report Card on Its PMA Review Process CPSC Releases Import Safety Strategy Other CPSC Actions in the News IEC Standards Update Product Reviews UL Standards Update Telcordia Standards Update From Our “You Can’t Make This Stuff Up” Department Looking Back: Items from Past Issues of Conformity Advertisers

Conformity Magazine - October 2008

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