Issue link: https://iconnect007.uberflip.com/i/1288481
96 PCB007 MAGAZINE I SEPTEMBER 2020 DOE #2 DOE #2 involved the impact of the electrolyt- ic process to improve reliability (Table 4): • Conventional copper deep tank line with mechanical agitation with/without a copper flash plating DOE #3 DOE #3 was a referee test to repeat DOE #2 with 21 panels (Table 5): • Conventional copper deep tank line with mech agitation with/without a copper flash plating • HDI copper filling using only the conventional line DOE #4 DOE #4 was a comparison to the production electroless line with 21 panels (Table 6): • 16 panels use production electroless line • Five panels use the new electroless line • The current production electroless line all survived the 250 cycles to 190°C • The IST testing discovered the 10 failures of the new electroless plating line Table 4: DOE #2 IST test results. Table 5: DOE #3 IST test results; low performance consistent with DOE #1.