Contact pad features
An electrical connection structure for connecting a piezoelectric element and an electrical circuit to each other with a conductive adhesive is described. The electrical connection structure includes an epoxy, a conductive component surrounded by the epoxy, and a trace feature implemented on top of the electrical connection structure.
1. An electrical connection structure for connecting a piezoelectric element and an electrical circuit to each other with a conductive adhesive, the electrical connection structure comprising:
an epoxy;
at least one conductive component surrounded by the epoxy; and
at least one trace feature implemented on top of the electrical connection structure configured to receive an end of a piezoelectric element, the at least one trace feature is configured to constrain the epoxy and the at least one conductive component.
2. The electrical connection structure of claim 1 , wherein the at least one trace feature includes a circular trace feature,
wherein the at least one conductive component includes a vertical conductive component positioned in the center of the circular trace feature.
3. The electrical connection structure of claim 1 , wherein the at least one trace feature includes two elongated trace features arranged alongside one another,
wherein the at least one conductive component includes a vertical conductive component positioned between the two elongated trace features and a horizontal conductive component abutting the two elongated trace features.
4. The electrical connection structure of claim 1 , wherein the at least one trace feature includes more than two elongated trace features arranged alongside one another.
5. An actuated assembly comprising:
at least one piezoelectric microactuator mounted near a first end of the dual stage actuated assembly;
a flexure mounted near a second end of the dual stage actuated assembly, wherein the flexure includes an electrical circuit including a contact pad configured to carry a driving voltage to the at least one piezoelectric microactuator,
the copper contact pad including:
an epoxy;
at least one conductive component surrounded by the epoxy; and
at least one trace feature implemented on top of the electrical connection structure, the at least one trace feature is in electrical contact with the at least one conductive component and configured to reduce thermal expansion.
6. The actuated assembly of claim 5 , wherein the at least one trace feature includes a circular trace feature,
wherein the at least one conductive component includes a vertical conductive component positioned in the center of the circular trace feature.
7. The actuated assembly of claim 5 , wherein the at least one trace feature includes two elongated trace features arranged alongside one another,
wherein the at least one conductive component includes a vertical conductive component positioned between the two elongated trace features and a horizontal conductive component abutting the two elongated copper trace features.
8. The actuated assembly of claim 5 , wherein the at least one trace feature includes more than two elongated trace features arranged alongside one another.
9. A dual stage actuated assembly comprising:
at least one piezoelectric microactuator mounted near a first end of the dual stage actuated assembly;
a flexure mounted near a second end of the dual stage actuated assembly, wherein the flexure includes an electrical circuit including a contact pad configured to carry a driving voltage to the at least one piezoelectric microactuator,
the contact pad includes:
an epoxy;
at least one conductive component surrounded by the epoxy; and
at least one depression feature implemented on top of the electrical connection structure, the at least one depression feature is in electrical contact with the at least one conductive component and configured to reduce thermal expansion, and the at least one depression feature is configured to constrain the epoxy and the at least one conductive component.
10. The dual stage actuated assembly of claim 9 , wherein the at least one depression feature includes a circular depression feature.
11. The dual stage actuated assembly of claim 9 , wherein the at least one depression feature includes more than one torus depression features.
12. The dual stage actuated assembly of claim 9 , wherein the at least one depression feature includes more than two elongated depression features arranged alongside one another.
13. The dual stage actuated assembly of claim 9 , wherein the at least one depression feature includes more than two elongated depression features arranged in a grid layout.