Mission Success Starts With Safety GSFC Electrostatic Discharge (ESD) Control Program Are you plugged in? Jeannette Plante, Program Manager, Code 300

Mission Success Starts With Safety Why Do ESD Events Occur? Electrical charge spreads across a surface and builds up. Once the item comes in contact with an electrical ground, the charge has a circuit to move in and a Discharge occurs: Person touches electronic part or electronic board Electrical cables are attached to instrument Soldering iron touches electronic part lead Electronic board is placed on shelf or table An electronic part slides out of a shipping tube onto a workbench surface The moving charge is current. When current moves in a medium heat is produced. High current can destroy the circuit path (“fuse”). Sensitive electronics in the circuit path will be destroyed by high discharge currents. An electronic Part’s sensitivity to ESD is called its ESD Sensitivity Level.

Mission Success Starts With Safety Source: White Paper 2: A Case for Lowering Component Level CDM ESD Specifications and Requirements, Industry Council on ESD Target Levels, March 2009 An ESD event is a sudden discharge of stored voltage (charge) through a circuit path to ground. ESD damage can result in instantaneous or delayed failure. Working conditions determine event type. Event type determines protection method.

Mission Success Starts With Safety

The goal is to: Prevent charge accumulation Charge accumulation is avoided, electric fields are monitored and controlled. Enable accumulated charge to discharge with a controlled, low current. Dissipative materials are used to enable accumulated charges to readily find a “gentle” discharge path that keeps current low.

Mission Success Starts With Safety 6 Ground connections Furniture Humans Test Equipment Surface resistance Neutralizing charge Ionizers Humidity Operator behaviors Assurance methods Verifications Certifications Records Training Special methods

Mission Success Starts With Safety ESD Sensitivity Level Designations Human Body ModelCharged Device Model Class 0 <250 V Class C1 < 125 V Class 1A 250 V to< 500 V Class C2 125 V to < 250 V Class 1B 500 V to < 1 kV Class C3 250 V to < 500 V Class 1C 1 kV to < 2 kV Class C4 500 V to <1 kV Class 2 2 kV to < 4 kV Class C5 1 kV to < 1.5 kV Class 3A 4 kV to < 8 kV Class C6 1.5 kV to < 2 kV Class 3B ≥ 8 kV Class C7 ≥ 2 kV CDM does not correlate with HBM and is still evolving GSFC-WM-001 Uses HBM Class 1A as a default for certified EPAs. GSFC-WM-001 provides controls for HBM Class 0 if needed. Subject Matter Expert help should be sought for CDM protections Avoid making “Class 0” a colloquial term for “super sensitive” This may prevent the right type of control methods from being used. 7

Mission Success Starts With Safety NASA Quality Assurance Program Policy (NPD ) ANSI/ESD S20.20 for ESD Control The Organization shall establish, document, implement, maintain and verify the compliance of the ESD Control Program in accordance with requirements of this document. GSFC Policy for Electrostatic Discharge Control (GPR ) GSFC shall use ANSI/ESD S20.20 and shall have a plant-specific implementation plan. All projects shall impose ANSI/ESD S20.20 or GSFC-WM-001. ESD Control program used for HBM 1C or more sensitive (and most CDM sensitivity levels). GSFC-WM-001 applicable to mission hardware including EM and critical GSE. R&D may choose not to apply but must document this decision. GSFC-WM-001, Workmanship Manual for Electrostatic Discharge Control (Excluding Electrically Initiated Explosive Devices) In-house builds only

Mission Success Starts With Safety It’s not in GDMS GSFC-WM-001 lives in the Code 300 configuration management system. An easy link to remember is: Then click on Useful Links Where is GSFC-WM-001 ?!?

Mission Success Starts With Safety Branch/Division Provides certified personnel Provides certified facilities Maintains certified facilities Provides equipment resources to EPA managers and users Stores and re-uses ESD control equipment Facilitates personnel mentoring and provides subject matter expertise Provides procedures and local training as applicable. Branch/Division Role vs Project Role Project Flows down requirement Covers cost of EPA resources (equipment, supplies, procedures) where need exceeds lab’s internal resources. Establishes tolerance for risk, process requirement waivers as applicable Defines impact of ESD damage and potential ESD damage 10

Mission Success Starts With Safety - Program Manager: Manages program including ownership of GSFC-WM-001 and GPR ; certifies ESD protected areas (EPA) (Code 300) - Level A Trainer: Trains Operators, Program Monitors, Level B instructors. - EPA Certifier: Certifies EPAs (Code 300, 800) - Subject Matter Expert: Helps navigate non-standard conditions (Code 300, 500, 600). Workmanship Branch Personnel - Lab Owner: Provides resources, assignments, points to correct training, accountable for all operations in labs - Program Monitor: Local owner of ESD protected area (EPA), designs and safeguards EPA, monthly verification measurements, special training, retraining biennially (Code 200, 500, 600) - Operator: Local user of an EPA, special training, retraining biennially (Code 200, 300, 400, 500, 600) - Level B Trainer: Trains personnel from their company or subcontractors - I&T ESD Lead: Defines control methods and procedures during I&T GSFC-WM-001 : Are You a Participant?

Mission Success Starts With Safety 12 Training GSFC School Operator: 4 hr class, overview, demonstrations [ESD] Program Monitor: 12 hr class, overview, hands-on exercises, demonstrations. Required for Bench Certification Level B Instructor: 16 hr class, overview, hands-on exercises, demonstrations, instruction materials provided Lab Owners: 1 hr class, overview of program, roles and responsibilities I&T ESD Lead: in development Classes held on Center and in Columbia Instruction is to GSFC-WM-001

Mission Success Starts With Safety 13

Mission Success Starts With Safety 14 Laboratory Quality Improvement Team Collaborative effort including Code 300, 400, 500, 600, 800 Strengthening process ownership, consistency and compliance across all labs Focus now is ESD, Calibration, Pressure Vessel Certification. Adding Lifting Devices, Workmanship Assessing each lab on Center to: – educate lab owners about requirements – provide opportunity to correct before audit by internal or external auditors – Feedback to process technical authority (e.g. Workmanship group for ESD) Project start was May Expect to take several years to visit each and every lab on Center. Urgencies identified in the ESD area: – Lab owner awareness – Training effectiveness – Missing content in GSFC-WM-001 – Garment process not fully effective

Mission Success Starts With Safety Questions?