Fabrication Drawing Notes

Key Engineering Specifications Your Custom Printed Circuit Board Fabrication Drawing MUST HAVE |:

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Understanding PCB Manufacturing: Silk-Screening

Understanding PCB Manufacturing: Silk-Screening: 

"Currently three methods are available for applying the “Ident” to the PCB. 

1. Manual screen-printing can be utilized when line widths are greater than 7 mil (0.007”) and the registration tolerance is 5 mil. 
2. LPI (Liquid Photo Imaging) provides more accuracy and legibility than manual screening and is employed when line widths are greater than 4mil. 
3. DLP (Direct Legend Printing) is the most accurate and legible of the 3 processes but also has the highest cost for consumables."

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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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DfR Solutions | Designing for Reliability

DfR Solutions |: Designing for Reliability

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Instruments for Temperature and Velocity Measurement | Q ATS

Instruments for Temperature and Velocity Measurement | Q ATS:

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Shake and Bake

Qualmark HawQ Portable Rapid Testing System - TestEquity:

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Cleaning - How Much Does It Cost?

Circuit Board Cleaning

How Much Does It Cost?:

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