Surface mount reliability test vehicle

The NCMS surface mount reliability test vehicle (RTV-SM) was designed for in situ electrical monitoring during thermal cycling tests, and the experiment included both electrical testing and... 

TABLE 12 Thermal Cycling Conditions for the Surface Mount Reliability Test Vehicle (RTV-SM)... 

FIG. 30 Top view of the printed circuit board reliability test vehicle (RTV) with a variety of surface mount components utilized for manufacturing and rehabihty assessments in the NCMS High-... 

Manufacturability and reliability assessments were performed with a PWB Test Vehicle (RTV) utilizing a variety of surface mount components, as listed in Table 42. The test vehicle is shown in Figure 30. An imidazole-finished copper surface was used on the PWB and the component leads were hot-solder-dipped in the same alloy as the paste used for assembly. Thermal cycling was performed from —55 to 160°C with a ramp rate of 10°C/min and temperature dwell of 10 min at each end of the cycle, for a total cycle duration of 1 hr. For each alloy, approximately 27 boards each containing 28 components were tested. 

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