No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Is water break test also applicable to FR-4?




2007

We currently encountering bubbles on our flex cicuit. We attach PSA to flex and adhere it
on FR4. We did a lot of stuff on lamination to optimize the process but still got bubbles. Then I come up with idea of contamination on FR4.I am doing "water break test" but am not
full confident if I am doing it right.

Jose G. Lachica
Flexible Circuit - Cavite, Philippines



Your best definition of a "water break test" is found in Standard Test Method for Hydrophobic Surface Films by the Water-Break Test Document Number: ASTM F22 [affil link]. It details to exacting detail all the nuances of performing the test and how to interpret it.

milt stevenson jr.
Milt Stevenson, Jr.
Syracuse, New York
2007




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"