Hi Dacia:
                        The studies have to be done in a specific environment with specific materials. Humidity, temperature, air quality, type of material, etc.  You can damage a board in  couple of years if it not protected properly under harsh conditions or you can keep it safe for decades if it is protected. So what is valid for one board under certain conditions is not for other boards under different conditions. What you might want to find out is what are the methods to protect a finish assembly if it is going to stay in storage for a long period of time, such as bagging it with a desiccant. There are some threads about best types of materials for protective bags in the archives.
        Regards.
        Ramon


-----Original Message-----
From: Dacia Super [mailto:[log in to unmask]]
Sent: Wednesday, May 19, 2004 12:50 PM
To: [log in to unmask]
Subject: [TN] Commercial Grade Life Expectancy


All -

I looked through the TechNet archives to see if I could find some info....
I found a few good discussions, but not any exact data that I am looking
for.

We currently produce commercial grade product - and recently a question has
been posed regarding the life expectancy of standard commercial grade -
post-production - product.

Does anyone out there have a specification that I can reference, or seminar
notes, or something that I could use as a guide for
conformance/expectations?

I'm referring to standard product - sometimes single sided, sometimes double
- and we employ the standard 3 X's rework rule, don't bake our boards prior
to production, etc.

Also, is there a longevity difference between Sync product and DDR?



Thanks in advance.
Dacia

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