Issue link: https://iconnect007.uberflip.com/i/304995
28 SMT Magazine • May 2014 HEaD-IN-PILLoW X-Ray INSPECTIoN continues using large board CT. However none of the AXI machines detect it as defect. There are varying types of HIP defects with different size and shape as shown in Figures 10 and 11. All current AXI machines have ca- pabilities to detect HIP N30 shown on Figure 10, however not all machines detected HIP pins Z15, AA 15, and AB15 (Figure 11). The laminog- raphy AXI 1 machine detects HIP type defects as pin AB15; however, it is challenging for AXI 1 to detect HIP type as Z15. Tomosynthesis AXI machines do not easily detect HIP type as AB15. feATuRe Table 10: AXI 1 and AXI 4 test summary with 1 and 2 types of algorithm threshold settings. figure 9: CT image for BgA crack with 9 μm. figure 10: CT images for HIP n30.