Issue link: https://iconnect007.uberflip.com/i/1288481
110 PCB007 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 fabricat- ed at the EU fabricator, dupli- cating 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 mi- crovia. 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)