Your board supplier is right in questioning the single sided via tent.
If this is a HASL finish, your board supplier can leave the top side open
during Soldercoat and then plug the via hole. This will solve his
fabrication issue. What remains is a potential assembly issue, which is
not entirely clear. There are many existing designs that utilize all
combinations of via/mask treatments. I would recommend talking to the
specific assembly house for their input on this design as it relates to
their process.
##############################################################
TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################