Issue link: https://iconnect007.uberflip.com/i/1284035
120 SMT007 MAGAZINE I SEPTEMBER 2020 The test board that IPC has selected is from the ESA pro- gram (Figure 8). The chess- board—with a purchase order issued by IPC to participate with IMEC and its board fab- ricator, a CBF in Europe—uses this design of daisy chains. There are six different chains, and Figure 9 shows where they are placed on a panel. Figure 9 is the panel that IPC is contracted to have fab- ricated at the EU fabricator, duplicating ESA. These will be constructed in Hitachi 679F laminate, which is an epoxy qualified at CB and most similar to the North American constructions of microvia. It will use four differ- ent test coupons, depending on the instrumen- tation for the analysis of the D-coupon to the HATS to two other coupons. The CITC coupon, which is the old IBM-developed method, was carried forward by i-3 and possibly TM and the IST coupon. Figure 8: The modified ESA microvia test panel for the IPC reliability testing using the Hitachi high-Tg laminate. (Source: IMEC) Figure 9: Layout and number of the four coupons on the IPC test panel. (Source: IMEC)