TECHNET Archives

December 2009

TechNet@IPC.ORG

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 >>]

Print Reply
Subject:
From:
Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Joyce Koo <[log in to unmask]>
Date:
Wed, 9 Dec 2009 07:56:42 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (211 lines)
is your chip is state of the art device?  If it is, the chip may not be able to withstand the high temp asy process.  Some of the latest chip (not that we are using them at the moment) last two years REQUIRE SnPb BGA due to device asy restriction.  
--------------------------
Sent using BlackBerry


----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Wed Dec 09 03:46:09 2009
Subject: Re: [TN] SnPb SOLDER BALLS WITH SAC SOLDER PASTE

Hello Guenter,


Your right but I've seen several specs where the maximum temperature of the bga is 220°C.  So Vapour Phase would not be an option for these components.
Bottomline is: check the maximum temperature of the leaded components in a specific lead free process. (for those who would like to do so).

Regards


Jowan Iven 
Process Engineer 
Neways Advanced Applications 



-----Original Message-----
From: Grossmann, Guenter [mailto:[log in to unmask]] 
Sent: Wednesday, December 09, 2009 9:40 AM
To: TechNet E-Mail Forum; Iven, Jowan
Subject: AW: SnPb SOLDER BALLS WITH SAC SOLDER PASTE

Soldering SnPb solderballs with SnAgCu works. The problem of the maximum temperature can be overcome by vapour phase soldering at 240°C ( even 230°C) and prior drying of the components.
About reliability there are various reports. Woodrow from Boeing claimed that PB contamination in SnAgCu solder joints is even beneficial.

Best regards

Guenter

>-----Ursprüngliche Nachricht-----
>Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Iven, Jowan
>Gesendet: Mittwoch, 9. Dezember 2009 09:24
>An: [log in to unmask]
>Betreff: Re: [TN] SnPb SOLDER BALLS WITH SAC SOLDER PASTE
>
>I agree with you Ioan,
>
>Most leaded bga's  have maximum temperature specifications below the
>lead-free process.
>So why worry about the balls when the bga is electrically damaged?
>
>
>Regards
>
>Jowan Iven
>Process Engineer
>Neways Advanced Applications
>
>
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
>Sent: Tuesday, December 08, 2009 2:54 PM
>To: [log in to unmask]
>Subject: Re: SnPb SOLDER BALLS WITH SAC SOLDER PASTE
>
>Hi Lee,
>
>First, how would you reflow a leaded BGA at LF temperatures without
>popping it?
>
>Then, the closest paper I have, coming your way in a second, is
>something from AIM saying that Pb will deposit at the points that cool
>the slowest, making brittle Pb pockets at the interface with the pad.
>
>Regards,
>
>Ioan Tempea, ing.
>Ingénieur Principal de Fabrication / Senior Manufacturing Engineer
>T | 450.967.7100 ext.244
>E | [log in to unmask]
>W | www.digico.cc
>
>N'imprimer que si nécessaire - Print only if you must
>
>
>
>------Original Message------
>From: Lee Whiteman
>Sender: TechNet
>To: [log in to unmask]
>Subject: [TN] SnPb SOLDER BALLS WITH SAC SOLDER PASTE
>Sent: Dec 8, 2009 08:17
>
>I know about the problems with soldering BGAs with SAC solder balls and
>SnPb solder paste and read plenty of papers pro and con.
>
>I heard about a report where if you solder BGAs with SnPb solder balls
>using SAC solder paste, the resulting solder joint will be unreliable.
>Has
>anyone heard of anything like that? If there are any cross-sections or
>papers that you can share with me, that would be great.
>
>Thanks again.
>
>Lee Whiteman, PMP
>Senior Member Engineering Staff
>L-3 Communications East
>Telephone: (856) 338-3508
>FAX: (856) 338-2906
>E-Mail: [log in to unmask]
>
>
>
>
>
>SENTEC
>11 Canadian Road, Unit 7.
>Scarborough, ON M1R 5G1
>Tel: (416) 899-1882
>Fax: (905) 882-8812
>www.sentec.ca
>
>---------------------------------------------------
>Technet Mail List provided as a service by IPC using LISTSERV 15.0
>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
>-----------------------------------------------------
>
>---------------------------------------------------
>Technet Mail List provided as a service by IPC using LISTSERV 15.0
>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
>-----------------------------------------------------
>
>
>
>This e-mail and any attachment is confidential and may be legally
>privileged or otherwise protected from disclosure. If you are not the
>intended recipient, please notify the sender immediately by returning
>this e-mail. Neways Electronics NV is not responsible for the improper
>or incomplete transmission of any e-mail, or for any delay in its
>receipt.
>
>
>---------------------------------------------------
>Technet Mail List provided as a service by IPC using LISTSERV 15.0
>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
>-----------------------------------------------------


This e-mail and any attachment is confidential and may be legally privileged or otherwise protected from disclosure. If you are not the intended recipient, please notify the sender immediately by returning this e-mail. Neways Electronics NV is not responsible for the improper or incomplete transmission of any e-mail, or for any delay in its receipt.


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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