Let's learn VIPPO process and quality standard--chart2
VIPPO quality standard control, below solutions
Strictrly following up the two standard specifications files ,as below
The main standard items are as follows:
1. Copper covering thickness standards: The measurement diagram is shown in picture below. The minimum thickness for level 2 standards is 5um, and the minimum thickness for level 3 standards is 12um.
2. Dent standard: Measurement pic, see Figure below, the maximum level 2 standard is 127um, and the maximum level 3 standard is 76um.
3.Bump standard: Level 2 and Level 3 standards, both are maximum 50um.
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4. Residues of via resin fill material between the cap plating and underlying plating are acceptable as long as they do not extend beyond the vertical extent of the drilled hole wall.
5.For HDI boards, the standard diagram of acceptable voids between the electroplated copper layer and the copper-filled holes is as follows:
Further deatils, pls kindly check next chart
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