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June 2006

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Subject:
From:
"Wenger, George M." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wenger, George M.
Date:
Mon, 5 Jun 2006 12:15:57 -0400
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Ioan,

Our standard test is 85C/85%RH non-biased over night and then put a
non-current-limited power supply across them and if they blow up they
were cracked.  When we're in a hurry we've put the in boiling water for
an hour and then put a power supply across them. 


Regards,
George
George M. Wenger
Reliability / FMA Engineer
Base Station and Subsystems Group
Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 (908) 546-4531
[log in to unmask]

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Monday, June 05, 2006 10:11 AM
To: [log in to unmask]
Subject: [TN] Finding cracked capacitors

Hi Technos,

a never ending story, ceramic caps that crack, possibly due to
depanelizing. The damage is not visible, unless the cap is cross
sectioned.

Is there any testing, thermal cycling or something like that, that could
show the damage real fast?

Thanks,

Ioan



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