Electronics Forum: sulfur-free paper (Page 1 of 1)

Interleaving paper for Immersion Silver PCBs

Electronics Forum | Thu Jan 17 14:52:17 EST 2008 | gnath

All, Can someone help find a source for purchasing interleaving/packaging paper for Immersion Silver boards (sulfur free + ph neutral ..). Thank you!

Raw PCB packaging

Electronics Forum | Mon Feb 20 16:31:09 EST 2006 | GS

Hello Gents, ..............several questions about the subject: Q1)Are there any standard regulating the subject ? Very few infos found on IPC. Q2)Which materials are suggested to seal (Bag) the PCB ? Q3)Is it necessary the vacuum sealed bag ? if

Raw PCB packaging

Electronics Forum | Wed Feb 22 08:31:42 EST 2006 | davef

Q1 Are there any standard regulating the subject? Very few infos found on IPC. A1 We�re unaware of standards for packing and storage for most types of boards. * IPC 4553 standard for Immersion Silver Finish, 3.8 Packing and Storage. * J-STD-033 and E

PCB becomes darken (yellownish)

Electronics Forum | Wed Sep 03 11:42:21 EDT 2008 | robinj

If the tarnish is really dark, it is very difficult to remove. Since it is yellowish it is only in the early stages. Replating will definitely work. I have used sulfuric acid based cleaners to remove this yellowish color. But rinse well and dry quick

Moisture absorbtion in circuit boards

Electronics Forum | Tue May 21 20:27:05 EDT 2002 | davef

No N2. We could not fix a benefit for N2 in our minds. Just fold the excess bag material over to expell most air and then seal the bag. [Have you assessed the benefit of N2?] F Monette can tell you stories about little versus more pressure. If he

Soldermask - sulfur presence

Electronics Forum | Mon Jun 25 11:33:20 EDT 2012 | davef

The immersion silver is an active surface and readily combines with sulfur from the environment. Silver sulfide tarnishes the surface and creates doubt about the integrity of the finish at inspection. [uyemura.com/library-4.htm] Your customer's boar

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