LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

January 2007

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET January 2007

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

Options:	Use Monospaced Font Show Text Part by Default Show All Mail Headers
Message:	[<< First] [< Prev] [Next >] [Last >>]
Topic:	[<< First] [< Prev] [Next >] [Last >>]
Author:	[<< First] [< Prev] [Next >] [Last >>]

Subject:	Re: Leaded and unleaded BGAs
From:	"Tempea, Ioan" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Tempea, Ioan
Date:	Tue, 30 Jan 2007 13:46:33 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (42 lines)

Darrel,

as already mentionned, even if you could work out a metallurgical joining, more or less reliable, the main issues are the temperature and MSD ratings of the BGA. If the part is rated under 240C, don't think about using an LF process or reballing with LF balls.

Since you have that 5/6 compliance, why don't you run the product on SnPb paste? The only thing keeping you from doing that would be if you had other BGAs on the board, that are LF. Although recent studies show that LF BGAs on SnPb paste are reliable, this is still not widely accepted.

Regards,

Ioan

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Darrel Therriault
Sent: Tuesday, January 30, 2007 1:17 PM
To: [log in to unmask]
Subject: Re: [TN] Leaded and unleaded BGAs


Richard/Technet,

Sorry for the confusion and my improper use of terms.

What I intended to say was we have BGAs with Pb balls.  I was wondering if 
there was an accepted process to attach those on a board that has non-Pb 
components by either reballing them with nonPb balls, using SRT rework or 
some profile that might allow both Pb and nonPb components to be run at 
the same time.

If there is no acceptable method, I either need to consume them in Pb 
assemblies (non-RoHS) or take an E&O hit on the Pb components.

DJT

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts 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
-----------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG