Impedance
correlation report requirements
Application Note 186
Occasionally, measured and predicted impedance do not correlate within expected measurement. Polar offers a professional commercial correlation service to help determine the root cause of the variation. Before a correlation study can start we need to receive the following physical and technical documentation. Correlation services are chargeable, and are available for correlation questions arising on impedance controlled structures modelled with Si8000m and measured with CITS500s (32bit) or CITS800s
| Requirement |
Supplied ? |
| 1. All data must be
clearly labelled and supplied. It must be clearly marked which
track on a coupon or gerber artwork is the one to be investigated.
If more than 1 problem track is supplied, it must be clearly
marked which data refers to which track. (Associated notes and
supporting information also need to be provided in English) |
|
| 2. What is the design
stackup? .Preferably an SB200 (.sci ) file. Must include expected
layer stackup, manufacturer & material used & material
properties. Material data sheet would be useful if using an
unusual or regional specific material. Clearly indicate the
problem track(s). |
|
| 3. Gerber files from
every copper layer of the stackup- not just problem layer. |
|
| 4. NC drilling
information with the gerber (so we can view the gerber layer
interconnects) |
|
| 5. CITS waveform files (.cvf) of problem track(s) | |
| 6. CITS .cif file |
|
| 7. At least 3 physical
samples of each track to be investigated. Permission to
destructively test sample, e.g. for microsection or other test as
required. At end of investigation sample will usually not be
returned, so clearly indicate if sample are expected to be
returned. |
|
| 8.What Impedance
calculation was performed with what numbers? Include .si8 file or
.sci file with impedance data |
|
| 9. Micro-section
pictures and data if available. Clearly labelled from which track
the section was taken. Must include CITS waveform file (.cvf) of
this track before it was sectioned. |
|
| 10. Date of last CITS
calibration - model and serial number. |
|
| 11. All electronic data to be zipped and emailed in a file clearly named "your_company_name_correlation.zip" |
For further correlation study information and pricing please talk to your regional Polar office:
| Contact
Polar now: |
Phone: |
|
| USA / Canada / Mexico | Ken Taylor | +1
503 356 5270 Please call me |
| Asia / Pacific | Amit Bhardwaj | +65
6873 7470 Please call me |
| UK / Europe | Neil Chamberlain | +44
23 9226 9113 Please call me |
Polar Instruments Ltd
www.polarinstruments.com
mail@polarinstruments.com
Tel: +44 1481 253081 Fax: +44 1481 252476
© Polar Instruments 2005. Polar Instruments pursues a policy of continuous improvement. The specifications in this document may therefore be changed without notice. All trademarks recognised.