Issue link: https://iconnect007.uberflip.com/i/304995
20 SMT Magazine • May 2014 as false calls, and escaped 28 HIP defects. The detected HIP pins (in green), escaped HIP (in red color), and false call pins (orange color) are listed in Figure 2. There are no significant dif- ferences between the good and HIP pins based on the AXI 1 images. This may be the effect of AXI1 HIP detection capabilities. Figure 3 shows "open outlier" measurement data for middle ball and pad slices of board #495. The measurement data tells us that AXI1 has the capabilities to detect some HIP pins. However, there is no clear measurement data gap between the good and HIP pins with the current version HEaD-IN-PILLoW X-Ray INSPECTIoN continues AXI software as it is reflected on AXI 1 images. Therefore, we understand why some HIP pins escaped, and also has difficulty to have zero false call. Table 2 lists the number of detected HIP, false call, and HIP escaped with different thresh- old settings at site 2. With the default threshold settings from AXI 1, the program didn't detect any HIP with zero false call. If we tighten the threshold from < -3 to < -2.5 for pad slice, and from >3 to >2 for middle ball, the detected HIP increased from 18 to 29, however the false call increased from 7 to 17 with the same program. As a recommendation, we suggest the settings feATuRe Table 1: AXI 1 open outlier measurement data for pad and middle ball slices (board #495). figure 2: AXI 1 images of detected HIP; escaped HIP, and false call pins.