Fellow TechNetters:

   I am requesting for assistance/clarification on the above stated standard section.   This was in the hay days when PWB utilized PTH every 100 thousands centers.   That was a lot of interconnects.   Now that we have HDI what is the criteria for the ROI on the required specimen as per Figure 4-2 of the same standard.

4.2.3.2 Test Specimen The test specimen shall be in accordance with 1.7. The test  specimen shall be a portion of the printed board not greater than 50 x 50 mm [1.97 x 1.97 in], the suggested test specimen, or the complete board if it is smaller than this size. The minimum number of holes to be tested is 30 per test lot. If there are not at least 30 holes in the test specimen, additional specimens shall be tested until at least 30 holes have been tested (see Figure 4-2 Through-Hole Test specimen). Test specimen preparation shall be in accordance with 3.4.

Victor,