The Threat to Miniaturization of the Electronics Industry

Conductive Anodic Filament (CAF) - Park / Nelco 2004

This article is a bit dated, however it is still excellent reading for anyone who needs a refresher course for CAF.


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Wicking - Plated Through Holes

Related: CAF : Understanding Conductive Anodic Filament (CAF) on PCBs - ICAPE Group

PCBDESIGN007 Isola's I-Speed Endorsed as Laminate Choice for PCBs

"I-Speed has been endorsed by two leading companies as the laminate of choice for PCBs using sequential lamination technology, requiring high conductive anodic filament (CAF) reliability and improved, cost effective signal integrity."

Source:
PCBDESIGN007 Isola's I-Speed Endorsed as Laminate Choice for PCBs:

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Laminate & Prepreg Manufacturing - Isola

When designing high volume PCBs is important to consider the regional availability of the materials used in the stackup.



Reference: Understanding_The_PCB_Laminate_and_Prepreg_Process

CAF Resistant Requirements: 

• Product must pass 1000 hr CAF testing (100V, 85%RH, 85C).
• B Stage (pre-preg) is restricted to the following glass styles: 106/1067, 1080/1086, 2113/3313 and 2116.
• C Stage (cores) must have a resin content > 45%.
• Isola 370HR material is recommended for cost sensitive applications.

Notes: 7628 and 1652 glass should be avoided if CAF is a concern.

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CAF RESISTANT STACKUP NOTES

Example Notes for Specifying a CAF Resistant Stackup.

1. Product must pass 1000 hr CAF testing (100V, 85%RH, 85C).
2. B Stage (pre-preg) is restricted to the following glass styles: 106/1067, 1080/1086, 2113/3313 and 2116.
3. C Stage (cores) must have a resin content > 45%.
4. Isola 370HR material is to be used.

Note 'e' glass materials with coarse glass bundles like 7628, 1652 are prone to CAF. 

CAF RESISTANCE MATERIALS

Isola

Source: Isola PCL370HR CAF Enhanced 


NAN YA PLASTICS CORPORATION

CAF - Conductive Anodic Filament

Click on image below to view



Source:
CAF resistance materials can withstand CAF testing for 2000 hours at 85℃/85%RH /50V DC

More CAF Links:
How to Avoid Conductive Anodic Filaments (CAF)

IPC-TM-650 TEST METHODS for CAF

TRACE LABS – CAF TESTING SERVICES

Link to all CAF Posts.

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CAF (Conductive Anodic Filament)