Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 22 Jul 1998 07:55:32 -0700 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
REGARDING ASSY:Reliability, SMT
With regards to surfmnt glass diodes (melf-type), how does one protect the body
from conformal coating. In the past, we sleeved the axial body to protect it from
CTE mismatch. I haven't yet contacted Mfg about the exact P/N of the conformal
coat material. Is this necessarily the reason for crack initiation? Could the cause be
the 'cooling' slope during reflow, thereby allowing the coating mismatch to
propogate the cracking?
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|