 
| Subject: | |
| From: | |
| Reply To: | TechNet E-Mail Forum. |
| Date: | Thu, 6 Mar 2003 14:47:57 -0600 |
| Content-Type: | multipart/alternative |
| Parts/Attachments: |
|
|
Victor,
You usually only find high-temp solderballs on ceramic devices. The reason for the high-temp solderballs is to increase the column height to improve solder joint reliability. This is due to the CTE mis-match between the Ceramic and FR-4.
Russell Nowland
Lucent Technologies, Suite 100
7725 West Reno Ave.
Oklahoma City, OK 73127
Phone: 405-782-7765
Fax: 405-782-7905
email: [log in to unmask]
-----Original Message-----
From: Victor Hernandez [mailto:[log in to unmask]]
Sent: Thursday, March 06, 2003 2:40 PM
To: [log in to unmask]
Subject: [TN] Solder ball composition
Fellow TechNetters,
What is the reasoning behind using High Temp Solder ( 95/5 ) for BGA's versus conventional
63/37 Eutectic solder besides different melting points? Is the strength factor an issue.
I would like to hear from the metallurgical group on this issue.
Victor,
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free 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/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
|
|
