Ernie,

Over the years we have not been able to tent holes unless we are able
to keep .012"-.015" of film around each hole.  If we have a constant
tent breaking problem it is usually because the design does not give us
this clearance.  With the proper amount of clearance I haven't had a
problem.

Doug Jeffery
Electrotek, Inc.


You wrote:
>
>                  We seem to have an issue with tents breaking on
large
>     holes ( .180 to .250 dia. ) as well as slots, typically .118 x
.250.
>     No matter whose film we have tried, the tents break. It is not
always
>     every panel, nor every lot. We have an idea that it may be being
>     caused by the developer. Has anyone out there wrestled with this
>     problem, and if so how was it resolved. To switch to secondary
drill
>     would just impact that departments output Any help will be deeply
>     appreciated.
>
>                  Ernie Smith
>                  Electropac Co. Inc.
>
>     e-mail to   [log in to unmask]
>
>     or on the technet
>
>################################################################
>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 web site (http://jefry.ipc.org/forum.htm) for
additional information.
>For the technical support contact Dmitriy Sklyar at [log in to unmask] or
847-509-9700 ext.311
>################################################################
>
>

################################################################
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 web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################