Hi Joyce,
where have u been--sure (3) is ideal, but where do you get the components from?
Werner
-----Original Message-----
From: Joyce Koo <[log in to unmask]>
To: [log in to unmask]
Sent: Mon, Feb 15, 2010 6:30 pm
Subject: Re: [TN] Pre-Tinned BGA?
(3) And (1). But not the other. (3) required nothing to be done on the assembly
level. All the rel data are valid. (1) may need reduced rel qual. The others,
as material change, most of the mil or hi rel house need full qual (shake, drop
all the nine yard). It would cost around 30 to 50k plus risk budget (depend
upon how complicated is your assembly) and 3 month delay. At least it use to
be. My ancient 1.8 cents.
--------------------------
Sent using BlackBerry
----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Mon Feb 15 17:49:57 2010
Subject: [TN] Pre-Tinned BGA?
Hello All,
I had a question to see if anyone has tried anything different. Most of our
customers are some how related to the military. So we have one product that the
customer just found out was a PB-Free device. They want us to "pre-tin" the
spheres. Now I have tried several process for forward and backward processes.
None of them include re-tinning of a BGA Device. We do re-tin other leaded and
some non leaded devices. So below are the three options I have recommended but
still have reliability concerns as the end product is to be coated with
Paralyne.
1. Re- Ball to PB/SN
2. Sue a selective rework machine and place pate with isolated heat if the
substraight could handle.
3. Purchase the component in PB/SN material
4. Reflow the product with slightly higher temps (5c per 10 zones) once out of
over and cold to room temp underfil the device.
Again if anyone has any more ideas I am game!!
Carl Ray
Lewisburg TN 37091
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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 email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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
-----------------------------------------------------
|