In situations where we built product for customers with this situation (I.E. SUN, COMPAQ), we
used a photoimageable letter screen product.  When your designators become smaller than a .007"
width, the typical screening process of letter screen created a blurred image.  A photoimageable
letter screen material is available from many of the LPI soldermask manufacturers.  It is best
applied using a 110 mesh or less screen.  The actual process involves enlarging the characters by
.015" (actual number is shop dependent) to create a screen that will allow for enough ink to
insure outlining of the characters,  after a tack dry, it is imaged, developed, and cured like an
LPI S/M.    Insure that you run some tests for adhesion, color integrity and assembly
compatibility before final acceptance. Hope this helps...... JOHN WAITE

Tamir Ben-Shoshan wrote:

>      Hi,
>
>      With the miniaturization of both devices and PCB's there is a big
>      problem with silk description near each device (designators), some
>      time it become to absurd that the designator is bigger than the device
>      it self. Does anyone has any solution or idea regarding this issue?
>
>      Thanks Tamir
>
> ################################################################
> 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
################################################################