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September 2006

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Subject:
Re: De-Lidding parts for Counterfeit Die
From:
Edward Szpruch <[log in to unmask]>
Reply To:
(Leadfree Electronics Assembly Forum)
Date:
Wed, 27 Sep 2006 07:28:41 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (61 lines) 
Hi,
Plasma process for desmear of PCB requires Freon , the oldest enemy of
the greenies. 
Edward

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Pratap Singh
Sent: Tuesday, September 26, 2006 11:54 PM
To: [log in to unmask]
Subject: Re: [LF] De-Lidding parts for Counterfeit Die

Bobby,



A simple and inexpensive way to expose the die in a package is to
'Plasma
Ash" the plastic. It is an old process and has been used successfully to
desmear PTH in a PCB prior to plating. It is also more environment
friendly.
If you need more information, there is a reference paper that can be
sent to
you directly since IPC will strip attachments.





pratap singh

____________________________________

Tel/Fax: 512-255-6820; Cell: 512-663-8903

www.rampinc.com ; EMail: [log in to unmask]


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-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
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To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
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