Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Sat, 17 Jan 2004 14:37:46 +0200 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Are you cleaning with ultrasonics?
Brian
Ernie Fung wrote:
> Greetings to all. We are currently experiencing cracking of the ceramic
> capacitors, on both primary and secondary sides of the PWB. The cracks do
> not appear to alter the electrical properties (PWBs pass in circuit
> testing), but we are concerned with long term reliability. Thermal
> profiling of all processes, and copying same in defect lab, has not
> reproduced the defect! The cracking appears randomly, and is spread across
> several vendors. Any helpful suggestions out there? Thanx for your time.
>
> ---------------------------------------------------
> 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 847-509-9700 ext.5315
> -----------------------------------------------------
>
>
---------------------------------------------------
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 847-509-9700 ext.5315
-----------------------------------------------------
|
|
|