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ESD Audits

Dangelmayer Associates’ audits are conducted by Engineers with first hand manufacturing experience, advanced degrees and unparalleled expertise!   Our audits provide findings reports, photographs of findings, detailed recommendations, and the assignment of corrective action priorities. Gaps will be identified between current best practices today’s technological challenges such as Class 000, CDM, CBE, EOS and S20.20.

“Wow – this is really an excellent assessment and report!  I was just thinking how our other consultants haven’t really dealt with the quality system, so I appreciate you giving us a whole “turn-key solution”.

  • Bob Herrick, PhD – Finisar, Senior Reliability Engineer

 

View the PDF Version

1) EPM Performance Benchmarking™/Audit
2) Advanced Technical Assessment/Audit
3) S20.20 Pre-Assessment Audit
4) Root Cause Analysis

 

 

1) EPM Performance Benchmarking™/Audit:



Note: Applications include manufacturing & supply chain
“You do not need to do this: survival is not mandatory.”
- Dr. W. Edwards Deming



graph1

Note:
1) May be used alone for benchmarking of individual or multiple sites or the supply chain

The EPM Performance & Benchmarking Assessments will be done over the phone. This may also be done independently without a technical assessment for benchmarking purposes of company locations and/or the customer’s supply chain. It is an accurate tool for quantifying the quality of an ESD Program and for qualifying suppliers. For instance, a site may end up with a score of 37% and be in the high risk zone or 97% and be in the preferred zone.

The questions are designed to analyze the ESD quality system. This is because the quality system ultimately governs the outcome of a manufacturing process. Questions are asked such as “Has management formally appointed an ESD Program Manager?” and “Are current best practices such as CDM, CBE and Class 0 adequately addressed in the governing ESD requirements document?”.

Extensive data confirms that the Performance Benchmarking Score correlates to manufacturing yield improvements (see example below).

Upon completion, this highly effective tool becomes a road map for improvement or development of a sound ESD Program. The metrics generated by this process provide management with capability to measure and track the ESD program performance of individual sites as well as the corporation’s relative position within the industry. The survey results are discussed in the Executive Summary of Annual Technical Assessment and are summarized in a PowerPoint presentation.

graph2
Example: Correlation between Yield and Performance Benchmarking Score™

 

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2) Advanced Technical Assessment/Audit:



Note: Conducted by Engineers with first hand manufacturing experience, advanced degrees and unparalleled expertise!

“Wow – this is really an excellent assessment and report!  I was just thinking how our other consultants haven’t really dealt with the quality system, so I appreciate you giving us a whole “turn-key solution”.
- Bob Herrick, PhD – Finisar, Senior Reliability Engineer

This advanced technical assessment/audit, in concert with our EPM Performance Benchmarking™, Assessment provides the most comprehensive roadmap for improvement available today.   Our assessments/audits provide findings reports, photographs of findings, detailed customized recommendations, and the assignment of corrective action priorities.  Gaps will be identified to current best practices as well as to the Customer's choice of standard, such as Internal Requirements, S20.20 or EIA-625.

Technical Assessment Benefits:

  • Provides detailed information that can be used for either improving programs or resolving ESD problems.
  • Identifies problems and provides solutions to the root cause of existing failure mechanisms. 
  • Qualifies manufacturing facilities for present and future product requirements.
  • Contributes to increased yields, process control, profitability, and customer satisfaction.

Technical Assessment/audit Highlights:

  • This is our most comprehensive assessment/audit and is intended for the quality conscious company that is serious about not only solving ESD problems but also about preventing recurrence.
  • A two day thorough sampling evaluation of the ESD process characteristics, ESD handling procedures/protocols, and state-of-the-art electrical and ESD event detection measurements of the ESD facilities automation, and test equipment.
  • Emphasis will be placed on the analysis of automation/test equipment and charged device model mitigation techniques.
  • Internal auditors will be invited to observe during the assessment and will be shown how to perform the assessments.
  • Gaps will be identified to current best practices as well as to the standard of customer choice, such as Customer Requirements, S20.20 or EIA-625. 
  • Comprehensive documentation (approximately 50 pages) of specific findings and recommendations will be included along with photographs of findings and priorities for corrective actions.
  • Technical explanations of findings will be shared during the assessment to facilitate customer understanding of the issues and any corrective actions that may be necessary.

 

State-of-the-art Test Equipment:

  • Three varieties of ESD Event Detection Equipment
  • Comprehensive set of ESDA ANSI Compliant test equipment

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3) S20.20 Pre-Assessment Audit:



Note: Conducted by Engineers who have managed ESD manufacturing programs that were S20.20 Certified under their leadership.  

"I’ve audited literally hundreds of ESD programs and, without a doubt; this program is the best I have ever seen. It's a world class benchmark…”
- Bill Gifford, DNV ISO 9000 Registrar, S20-20 Lead Auditor.

This S20.20 Pre-Assessment Audit may be done solely for the identification of gaps to S20.20 and expert recommendations for achieving S20.20 certification on the first try.  It may also be combined with our Advanced Technical Assessment as described above for a complete assessment of gaps to both S20.20 and current best practices.  

A complete analysis will be conducted of the Administrative and Technical Elements of S20.20 such as the ESD Control Program Plan.   Gaps to S20.20 will be succinctly identified along with customized expert recommendations for corrective actions. 

S20.20 - 2007 Administrative Requirements:

  • ESD Control Program Plan
  • Training Plan
  • Compliance Verification Plan

 

S20.20 - 2007 Technical Requirements:

S20.20 TABLE 1. Grounding / Equipotential Bonding Requirements

 

Technical Requirement

Implementing Process

Test Method

Required Limit(s)

Grounding / Bonding System

Equipment Grounding Conductor

ANSI/ESD S6.1

< 1.0 ohm impedance

Auxiliary Ground

ANSI/ESD S6.1

< 25 ohms to the Equipment Grounding
Conductor

Equipotential Bonding

ANSI/ESD S6.1

< 1.0 x 109 ohms

 

S20.20 -2007  TABLE 2. Personnel Grounding Requirement

Personnel Grounding Technical Requirement

Product Qualification1

Compliance Verification

Test Method

Required Limit(s)

Test Method

Required Limit(s)

Wrist Strap System2

ANSI/ESD S1.1 (Section 5.11)

< 3.5 x 107 ohms

ESD TR53
Wrist Strap Section

< 3.5 x 107 ohms

Flooring / Footwear System – Method 1

ANSI/ESD STM97.1

< 3.5 x 107 ohms

ESD TR53
Flooring Section

< 3.5 x 107 ohms

ESD TR53
Footwear Section

< 3.5 x 107 ohms

Flooring / Footwear System – Method 2
(both required)

ANSI/ESD STM97.1

< 109 ohms

ESD TR53 Flooring Section

< 1.0 x 109 ohms

ANSI/ESD STM97.2

< 100 volts

ESD TR53 Footwear Section

< 1.0 x 109 ohms

 

S20.20 -2007 TABLE 3. EPA ESD Control Items

Technical Requirement

ESD Control Item

Product Qualification1

Compliance Verification

Test Method

Required Limit(s)2

Test Method

Required Limit(s)

EPA

Worksurface

ANSI/ESD S 4.1
and/or
ANSI/ESD STM 4.2

< 1 x 109 ohms
and/or
< 200 volts

ESD TR53
Worksurface Section

< 1 x 109 ohms resistance to ground

Wrist Strap Cord

ANSI/ESD S1.1

0.8 x 106 to
1.2 x 106 ohms

For compliance verification of a wrist strap system, see Table 2.

Wrist Strap Cuff

ANSI/ESD S1.1

Interior
< 1 x 105 ohms

Exterior
> 1 x 107 ohms

Wrist Strap Cord Bending Life

ANSI/ESD S1.1

> 16,000 cycles

Footwear

ANSI/ESD STM9.1

< 1 x 109 ohms

See Table 2

See Table 2

Foot Grounders

ESD SP9.2

< 1 x 109 ohms

See Table 2

See Table 2

Flooring

ANSI/ESD S7.1

< 1 x 109 ohms

See Table 2

See Table 2

Seating

ANSI/ESD
STM 12.1

< 1 x 109 ohms

ESD TR53
Seating Section

< 1 x 109 ohms resistance to ground

EPA

Ionization other than Room Systems

ANSI/ESD STM 3.1
- Discharge time
- Offset voltage

 

User defined
< ± 50 volts

ESD TR533
- Discharge time
- Offset voltage

 

User defined
< ± 50 volts

Ionization  (Room Systems)

ANSI/ESD STM3.1
- Discharge time
- Offset voltage

 

User defined
< ± 150 volts

ESD TR533
- Discharge time
- Offset voltage

 

User defined
< ± 150 volts

Shelving

ANSI/ESD S4.1

< 1 x 109 ohms

ESD TR53
Worksurface Section

< 1 x 109 ohms resistance to ground

Mobile Equipment
(Working Surfaces)

ANSI/ESD S4.1

< 1 x 109 ohms

ESD TR53
Mobile Equipment Section

< 1 x 109 ohms resistance to ground

Continuous Monitors

User defined

User defined

ESD TR53
Continuous Monitors Section

Manufacturer defined

Garments

Static Control Garment
(ANSI/ESD STM2.1)

< 1 x 1011 ohms

ESD TR53
Garments Section

< 1 x 1011 ohms

Groundable Static Control Garment
(ANSI/ESD STM2.1)

< 1 x 109 ohms

ESD TR53
Garments Section

< 1 x 109 ohms

Groundable Static Control Garment
System
(ANSI/ESD STM2.1)

< 3.5 x 107 ohms

ESD TR53
Garments Section

< 3.5 x 107 ohms


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4) Root Cause Analysis:



Note: Conducted by our most experienced Engineers and Scientists with advanced degrees and/or specialized expertise including product ESD designed-in protection.

We are uniquely equipped to efficiently locate the root cause of ESD damage in complex manufacturing operations due to our team of advanced engineering experts and over 200 years experience.  We pioneered many aspects of ESD event detection techniques and have unequalled experience with these an other advanced auditing techniques,  Thus, it is possible to readily analyze sophisticated automated or manual production lines and pinpoint the root cause of ESD failure. 

Once the root cause has been identified we can draw on our depth of experience and technical understanding of the physics of ESD to efficiently resolve manufacturing issues or to redesign products to enhance designed-in protection.

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