Hi,everyone:
   We have put the vibrators on the PTH line and Pattern Plating line
   in  order to improve the yields of small holes, for example, hole with
   0.20mm or 0.25mm diameter. However, we don't know how the vibrator
frequency
   and magnitude affect the yields of small holes (the vibrating direction
is
   the  same as the agitatings'). Could you please tell us more
   information about the vibrator? Thanks a lot.

   We will appreciate your advice and look forward to your reply.

                                                  Yours sincerely
                                                     Tracy Xie