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JWG – Charged Device Model (CDM) Device Testing


Working Group Chairs:  Terry Welsher, Dangelmayer Associates; Alan Righter, Analog Devices, Inc.


Summer 2018 Virtual Meeting

Agenda items for the meeting on June 28, 12:15 – 1:45 PM EDT are:




April 2018 Face-to-Face

Summary of meeting activities:
The joint committee reviewed the current status and next steps for ANSI/ESDA/JEDEC JS-002. It was decided by the group to draft a CDM “user guide” so an initial writing team was formed and a list of topics was generated. The group also discussed the next action items for seeking harmonization with JEITA for ANSI/ESDA/JEDEC JS-002.

Agenda items for the meeting on April 14, 1:00 – 5:00 PM PT are:

Update on JS-002 activity in standards bodies (ESDA, JEDEC, AEC)

  1. Update on TR5.3.1 and DSP5.3.3 activity
  2. Update on CC-TLP SP (if available)
  3. Review of JS-002 parking lot items / data and writing teams
  4. Discussion towards JS-002 User Guide
  5. Discussion on JEITA CDM and next steps for collaboration
  6. Other presentations (time permitting)
  7. Old / new business

Winter 2018 Virtual Meeting
The joint committee adjudicated technical and advisory support committee comments on ESD WIP5.3.3 and ESD TR5.3.1-01. A presentation was given on CDM measurement effects due to coaxial cable skin effect and dielectric losses.

September 2017 Face-to-Face Meeting
Agenda items for the meeting on September 7, 2017, 8:00 AM – 12:00 PM MST are:


  1. ESDA Meeting series policies
  2. Review of JWG comments on DSP5.3.3 (Low Impedance Contact CDM)
  3. Presentation – measuring frequency response of JS-002 probe assembly
  4. CC-TLP SP work statement review / set up writing team
  5. Discussion on next steps for JS-002 (making it more hardware agnostic – including various contact CDM methods, frequency response calibration, etc).. writing team interest
  6. Possible other presentations (may not have much time for additional presentations but will consider 1-2 if they can be submitted by Monday 9/4)
  7. JS-002 update (STDCOM next step)
  8. AEC Q100-011 update (integrating JS-002)
  9. JEITA update / next steps (possibly comparison testing with JS-002)
  10. Old / new business


Summer 2017 Virtual Meeting
Summary of meeting activities
A brief overview of CDM, the history of the CDM joint working group, and current documents in process was given. A presentation on CDM measurement errors was presented by a working group member. An update on the status of a new standard practice, ESD WIP5.3.3, low-impedance contact CDM as an alternative CDM characterization method, was also given.

Agenda items for the meeting on July 25, 2017, 11:30 AM – 1:00 PM ET are:
a.      Brief Introduction to CDM JWG and work in progress
b.      Update on JWIP-002-LB (small package CDM Annex new content and several updates) – TAS comment review by JWG
• Next step STDCOM
c.      Update on Low Impedance CCDM
d.      Update on Improved Resistor / Frequency Response – team measurements – next steps
e.      JWG discussion on next revision of JS-002
• This is to engage the group on discussion of a possible “hardware agnostic” version of JS-002 which could incorporate field-induced as well as contact methods, and how the standard could be structured.  Meant to start discussion at this meeting and continue (structure, team development) at next meeting.  All ideas are welcome.
f.       Old / new business

April 2017 Face-to-Face Meeting
Summary of meeting activities
The joint working group adjudicated Technical and Advisory Support Committee comments on ESD TR5.3.1-01-1X. Six presentations were given on the direction of team experiments / writing of a low impedance CCDM work in progress document; two case studies on “Should we stress NC pins?”; three FICDM tester issues reported – NC pin stress affecting next pin stress, single discharge mode HV relay issue, and runt pulses with calibration module over charging plate vacuum hole for higher plate voltages; ANSI/ESDA/JEDEC JS-002 calibration concerns resulting in large product under stressing; FICDM DUT charging issues and resulting CCDM field plate recommendations; and proposed improvements to ANSI/ESDA/JEDEC JS-002.

Agenda items for the meeting on April 29, 2017 from 1:00 – 5:00 PM MT are:
a.      JWG review of TAS comments on small package CDM revision (if available) and next steps for STDCOM / JEDEC
b.      JWG review of TAS comments for 50 ohm CCDM TR (if available)
c.      Review of and proposing work on parking lot items for next revision of JS-002
d.      Any presentations (this is a request for anyone to bring a presentation – please send Terry and Alan a presentation draft by Wednesday April 26)
e.      Low Impedance CCDM next steps
f.       CC-TLP update
g.      Any new business

Winter 2017 Virtual Meeting
Summary of meeting activities

A brief introduction and history of CDM and the joint working group was presented. A presentation was also give on Improving the CDM Test to Improve DUT Failure Repeatability. The committee also began reviewing and discussion items for the next revision of JS-002.

Agenda items for the meeting on Tuesday, January 31, 2017 from 10:00 – 11:30 AM ET are:
a.      Welcome and ESDA/JEDEC meeting guidelines (Christina)
b.      Brief review of CDM JWG committee and work in progress
c.      Update on “50 ohm” CDM Standard Practice document
d.      Update on improved frequency response test head measurements at test sites (Jon Barth and team)
e.      Review and  update list of “parking lot” items for next JS-002 revision
f.       Update on January JEDEC 14.3 committee meeting regarding CDM

September 2016 Face-to-Face Meeting

Summary of meeting activities

The joint working group adjudicated Technical and Administrative Support committee comments on the limited revision of ANSI/ESDA/JEDEC JS-002. Six presentations were given on low impedance CCDM (a technical report is planned for this topic); CC-TLP (a technical report is planned for this topic); a new CCDM method (contact first CDM); JS-002 frequency response/test head measurement; Symposium paper 4A.3 on ANSI/ESDA/JEDEC JS-002 testing; and an update on ERC CDM (measurement in manufacturing) project.

September 2016 Face-to-Face Meeting

September 9, 2016, 1 to 5 pm PDT meeting agenda items:

  • Review work statements for CC-TLP and low impedance CCDM
  • Adjudication of JS-002 Small Package CDM TAS review comments
  • Presentations:

•        Low Impedance CCDM TR and brief update

•        CC-TLP simulation study update

•        New CCDM Technique

•        JS-002 Frequency Response Work update

•        Review of 4A.3 JS-002 paper

•        JS-002 4A.2 Paper presentation

  • JS-002 company updates and discussion on next steps
  • Update from writing teams on metrology section, user guide
  • AEC – Cleaning of DUTs prior to testing referenced in document
  • AEC – MM testing option if CDM is not testable for small packages

Summer 2016 Virtual Meeting

Summary of meeting activities
An introduction to CDM JWG and past work / work in progress was presented for guests new to the WG. A presentation was given on frequency specs relative to more accurate CDM data. Status updates were discussed for a new standard practice on CC-TLP and the JEDEC JESD47 ballot for incorporating JS-002 into JESD47.

Tuesday, July 19 10:00-11:00 am meeting agenda items:

  1. ESDA/JEDEC Standards Policies Review - Christina
  2. Introduction to CDM JWG – Work in progress
  3. Review of work in progress
    1. CCDM TR (50 ohm status and lower impedance CCDM plan)
    2. JS-002 teams update – measurement, product data gathering)
    3. JS-002 harmonization updates
    4. Old / new business

April 2016 Face-to-Face Meeting
Summary of meeting activitiesThe committee adjudicated TAS comments on the contact charged device model (CCDM) technical report, TR5.3.1-01. The document will be submitted for publication prior to the July virtual meeting.

Four presentations were made on 2.5” vs 4.25” Ground Plate Ferrite Free Analysis; update on Low Impedance CCDM; Measurements of Bandwidth of Discharge Heads; and a review of the small package section 7.5 / Annex C draft for future revisions to ANSI/ESDA/JEDEC JS-002.

The joint WG discussed plans for future experiments regarding the metrology section of ANSI/ESDA/JEDEC JS-002 and ground domain supply pin reduction. The committee also drafted a response to JEITA regarding harmonization questions and concerns related to JEITA’s contact CDM method.

Saturday, April 16, 1-5 PM agenda items:

• ESDA/JEDEC Cautionary Statements / Meeting Series information
• CCDM TR review / adjudication of TAS comments
• Small package CDM updated draft review
• Presentation - CDM tester ground plane study
• Updates on JS-002 Implementation / data / comparison with JEDEC
• Developing response to Tanaka-san February JEITA presentation – attached is
the JEDEC ED-4701-300-2 document for review (300-2 is the first 25 pages)
• Other presentations (frequency response, CCDM, ?)
• Other JS-002 section updates (metrology chain specifications?)
• Supply / ground pin testing reduction? Testing proposal

Winter 2016 Virtual Meeting
Summary of meeting activities
A brief overview and history of the JWG was presented for new meeting attendees. WG member comments were adjudicated on the CCDM TR and a final version will be sent to the WG for approval to submit to TAS. The committee reviewed the proposal for a small package CDM section and normative annex in the next revision of ANSI/ESDA/JEDEC JS-002.