The main function of the support st

The main function of the support structure consists in the load pick-up of the functional components during the casting cycle. Since the PZT foil is the key element of the piezoelectric modules compressive stresses can be applied, tensile stresses should be prevented. Based on x-ray analysis three observations can be made:
-Even though the LTCC-dummies are very sensitive against specific mechanical loads, they survive the severe casting conditions without crack formation or delamination from the support structure.
- The adhesive bonding between Al99.5 sheet and the functional component remains active and is not showing any sign of degradation despite of the high temperatures during the casting cycle.
-Due to the intact bonding layer and the adapted support structure design high position preservation is accomplished.