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| From [log in to unmask] Mon Jan 13 15: |
49:43 1997 |
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Eugenio,
Since you are using Entek 106A (multi-pass OSP) you typically have a
shelf life of 6 months, if properly stored or less if not properly
stored. SnPb finishes typically have the same shelf life as OSPs and
should be Nitrc Acid striped and re-HAL to remove the IMC which
plagues the solderability.
In using OSPs you must have handling procedures in place that are different from
HAL boards. Also investigate the method of storage. Some OSPs will need
re-coating after 3 months in severe environments.
Conduct some solderability tests with your OSP and identify shelf life in your
environment.
John Gulley - QA
INET Inc.
______________________________ Reply Separator _________________________________
Subject: ASSY: OSP coatings
Author: [log in to unmask] at Internet
Date: 1/13/97 6:38 PM
Dear Tech-netters,
We are experiencing solderability problems with boards which are OSP
(Entek-plus-CU-106) coated by our supplier and have been in our
storage facility for just on 12 months.
Does anyone know of any guidelines (published or experience-based) for
shelf life and protection requirements in storage of boards with this
type of coating ?
Thanks in advance.
Eugenio Bini
ERG Ltd.
247 Balcatta Rd.
Balcatta, WA 6027
Australia
Tel:+61-9-2731174
Fax:+61-9-2731450
email: [log in to unmask]
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