My friend pass me another question. I hope someone
can give some inputs.
  The application is a mobile phone keypad (gold
plated), Motorola's engineer insists that it is not
acceptable if we can see the patten of glass fabric.
The microsection shows there is no weave exposure or
weave texture(use 0.014" H/H laminate,construction is
2 ply of 7628)
  1. Is it true that the circuit board surface is more
rough if we use 7628?
  2. What can do to improve the surface quality? Use
2116 instead of 7628 or modify the resin content of
7628 prepreg?
  3. Is there any related specification?

  Thanks in advance!
  Shirley


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