Good Morning TechNet,

I have a fabrication drawing with a note with the following note.

Material:  .062 laminated glass (woven fabric) base, epoxy resin, Flame
retardent, FR4.
              copper clad 2 oz./sq ft.  Laminate must be certified to
have a minimum comparative
              tracking index of 175.  Microsection demonstrating
compliance with copper weight,
              dielectric spacing, line width and use of CTI 175 or
better material shall be shipped
              with each lot.

I am at a loss on the CTI 175 stuff.  I have reviewed IPC 4101 and don't
find a reference.  I have
placed a call to our material supplier but no response yet.  The TechNet
seems much faster.
Can anyone provide me with a clue?  Thanks in advance for the help.

Anne Ledger
EMDS, Inc.
[log in to unmask]

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