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FMC ADC 100M 14b 4cha - Hardware
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  • FMC ADC 100M 14b 4cha - Hardware
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  • #18

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Opened Oct 31, 2011 by Erik van der Bij@erikvanderbij
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V5 - Line spacing diff lines not precise

Producer found some inconsitencies in line spacing of differential lines.

At layer 3 differential impedance is asked for certain tracks. Theoretically 0.208mm track and 0.127 spacing is mentioned. However, we see that certain spacings are not at all 0.127mm. Other pairs have partially at 0.127 spacing, but later they'll continue at 0.15mm or 0.17mm.

  • Visual check shows no serious problems, so V5 is OK for production (EB).
  • Verify if needs to be corrected in V6.

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  • snap03.bmp
  • snap04.bmp
  • snap06.bmp
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Reference: project/fmc-adc-100m14b4cha-hw#18