**3.1 Dimensional stability after aging**

First, the dimensions in widths and thicknesses of each tensile bar were compared before and after aging. **Figure 3(a)** and **(b)** shows the % change in width and thickness after each interval (168, 336 and 500 Hours) of high temperature and high

**Figure 2.** *Profile for (a) thermal cycling test and (b) high temperature high humidity test.*

humidity aging. From the figures, it is visible that the dimensions were very stable after aging. Expansion in width and thickness for all the tensile bars were within 0.25%, which were within the measurement error.
