Juan,

All I can say is life is not easy and manufacturing electronics is not simple.  
That is why God created engineers.  By following your plan you are putting 
your products and customers at risk.  The IPC J-STD-033x is the end user 
guide for handling MSD components.  This spec is written around the 
requirement in J-STD-020x which is the device qualification spec.  The J-020 
committee is based mostly of device manufacturers and reliability engineers 
whose task was to resolve real/proven reliability concerns.  The risks are real 
and you could be sending time bombs to your customers.  It is kind of the 
equivalent of not wearing ESD protection.  You never know when you have 
damaged a device that will fail in time in the field.  I audit all of my suppliers 
to the letter of the spec.  That is my only assurance that I am protecting my 
products and customers.  

Is the spec overcompensating? I am sure it is a little but that is necessary to 
insure nothing slips through.  Is it overcompensating a lot?  No, it is in the 
industries best interest to make manufacturing as simple as possible.

Your Baking at 125C for 24 hours is an old catchall that has been proven 
wrong.  You baking for 192 hours at 40C is barely touching the charts.

If I was to audit your operation this would be a major finding.  I agree MSD is 
a complex operation and it requires a good understanding of the specifics by 
the engineers and likewise the development of a robust process.  

There are some good sources of information on the web and there are some 
good systems out there that can help you track your exposures and baking.  I 
have also seen a lot of home grown systems that work pretty good.  One of 
the better off the shelf systems (not cheap though) is with a company call 
Cogiscan.  They also have some helpful information on there website in 
their "Knowledgebase".  

http://www.cogiscan.com/index_en.php

I hope this helps,


Russell Nowland
Alcatel-Lucent           
Advanced Manufacturing Engineer
Address: 14000 Quail Spring Parkway, Suite 300 Oklahoma City, OK 73134
email: [log in to unmask]
Desk: 405-302-1660
Cell: 405-203-0034
Fax: 405-302-1622

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