A miniature electrical relay including a piezoelectric actuating element
where the piezoelectric actuating element includes a piezoelectric
thin-film material sandwiched in between two metal electrode layers that
function as piezoelectric electrodes. The metal electrode layers are
connected to a positive and negative terminal, respectively, of a power
source, which results in actuation of the piezoelectric actuating element.
The piezoelectric actuating element is affixed to a deformable metal
contact through an insulating layer, such that when actuated, the
piezoelectric actuating element selectively deforms the deformable metal
contact to cause the contact to move into or out of electrical and
mechanical connection with a fixed metal contact. A method of making the
miniature piezoelectric includes providing a support structure, depositing
a first contact on a first portion of the support structure, depositing a
second contact on a second portion of the support structure, wherein the
second contact is deformable with respect to the first contact for
selectively engaging the first contact, and fabricating a piezoelectric
actuator that selectively deforms the second contact relative to the first
contact.