Mr. Mullet,

Type B is photoimageable (dry film [B2] or LPI[B1]), while type A is screened.

George Toman
Circuit Center Inc.
----------
> Dear TechNetters,
>
> We have been specifying, on our Fab Drawings, the use of "Type B"
> soldermask.  I am under the assumption that this "Type B" is LPI, and "Type
> A" is screened soldermask.  Is this correct? Where can I find these "types"
> defined.  As far as I know there's nothing defined in IPC-SM-840C.
>
> Thanks for you help.
>
> Mr. LaVern Mullet
> Thomas & Betts
>
> ################################################################
> 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
################################################################