Electronics Forum | Wed Apr 13 05:48:52 EDT 2005 | charly
hi' i need advise on immersion silver PCb shelf life. 1) what is the shelf life for Immersion silver PCB? 2) iF PCB expire, can we bake the immersion PCB? what temp & duration? 3) How long can we keep the pCB again after rebaking? (with vacuum seal)
Electronics Forum | Wed Apr 20 08:06:21 EDT 2005 | davef
We'd reject the boards because: * Vacuum seal is punctured. * HIC is expired. One of the nice things about immersion coatings is that the fab can rework the coating. You cannot do that with other coatings. Finally, every HIC that we investigated c
Electronics Forum | Fri Apr 15 05:52:20 EDT 2005 | charly
hi Jon, does it mean the protective layer is coated after the immersion silver process? if we need to bake the PCb due to moisture issue, then we can not hold the pCB long due to the missing protective layer even with vacuum seal environment
Electronics Forum | Wed Apr 13 07:10:17 EDT 2005 | masters
In addition,how to deal with the misprint immersion Ag PCB?Now,we just remove the paste,clean it,and exposed in air for 2 hours,and then put to use.
Electronics Forum | Wed Apr 07 08:28:41 EDT 2004 | Dougie
Hi, We are Scottish manufacturing company considering a move to Immersion Silver finished PWB's from HASL. The driver behind it being the RoHS and WEEE legislation in Europe at present. My question is... We plan on using a Sn/Cu/Ni solder bar in o
Electronics Forum | Wed Apr 07 08:30:22 EDT 2004 | Dougie
Hi, We are Scottish manufacturing company considering a move to Immersion Silver finished PWB's from HASL. The driver behind it being the RoHS and WEEE legislation in Europe at present. My question is... We plan on using a Sn/Cu/Ni solder bar in o
Electronics Forum | Tue Jul 13 16:35:25 EDT 2004 | Richard
Sounds like your Si plalladium finish has oxide on it from the firing or sitting around too long. I used to assemble LTCC and have had plenty of dealings with this matter. The best and easiest is to get an active type flux and solder paste. AIM makes
Electronics Forum | Thu Apr 14 06:00:01 EDT 2005 | bryan
The shelf life of immersion silver is 6 to 12 months in good storage conditions. The finish is usually coated with a protective layer that inhibits oxidation (like with copper OSP). Care must be taken when handling the boards as the protective la
Electronics Forum | Mon Apr 18 20:44:30 EDT 2005 | davef
Charly: Why do you "need to bake the PCb due to moisture issue", if you're not going to use the board? Why bake the board, just to put it back in storage, absorb moisture, and require baking again?
Electronics Forum | Wed Apr 20 01:08:16 EDT 2005 | charly
actually, i received a shipment from supplier where the vacuum seal was puntual and the HIC is out of order, the supplier ask me to bake and keep back into the store, but i worry is there any quality impact if i do so?
