Electronics Forum | Thu Jan 09 04:48:52 EST 2020 | SMTA-Davandran
Anybody has data for stencil foil life span?
Electronics Forum | Wed Jan 15 03:02:10 EST 2020 | SMTA-Davandran
At least there are method on detection of stencil replacement before it really fail which can safe line down.
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 | 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 | 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?
Electronics Forum | Thu Jan 09 15:06:45 EST 2020 | emeto
From what I have seen it will be based on thickness, material and usage. Sometimes will be product dependent if the you have a marginal process. We used to change stencils every 2-3weeks for a high runner. Other than that follow Sr.Tech's advice.
Electronics Forum | Fri Jan 10 08:11:06 EST 2020 | robl
We changed monthly on lines where we were doing 1500 print cycles+ per day, but on low runners we could use a stencil for 10 years+. As previously mentioned it depends on how you treat it.
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 | Tue Apr 19 11:54:36 EDT 2005 | masters
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