Hi Juliano-

An easy one!

The surface finish doesn't matter at this scale because the main concern is
moisture uptake on the PCB. Of course, that depends on the board and
materials, but typically a work shift (8-12 hrs) is just fine. If you have a
concern about a particular board, you need a balance good to micrograms and
an oven so you can see the rate of moisture uptake.

Wayne Thayer

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Datacom - Juliano
Ribeiro
Sent: Tuesday, July 22, 2014 12:32 PM
To: [log in to unmask]
Subject: [TN] PCB Shelf Life

Hi,

We are sourcing a table with the Maximum Time before reflow/wave that the
bag need to opened according to surface finishes .

For example:

OSP, ENIG, HASL, HAL

OSP=xx hours before reflow (maximum)

ENIG=xx hours before reflow (maximum)

..

..

..

 

Thank you

_____________________________

Juliano Bettim Ribeiro

DATACOM 

ENGENHARIA DE PROCESSOS
Rua América Nº 1000 - Eldorado do Sul - RS CEP: 92990-000 
+55 (51) 8446-2135

+55 (51) 3933-3000 

Ramal: 3484
 <mailto:[log in to unmask]> [log in to unmask] 
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