# US 11,121,647 B2 · Contact pad features > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,647 B2 - Document ID: US11121647B2 - Status: Granted - Kind: B2 - Application number: 16/701,059 - Filed: 2019-12-02 - Published: 2020-06-18 - Granted: 2021-09-14 - Earliest claimed: 2018-12-13 - Assignees: Magnecomp Corporation - Applicants: Magnecomp Corporation - Inventors: Kuen Chee Ee; Peter Hahn; David Glaess; Keith A. Vanderlee - Web page: https://patentgrep.com/patent/US11121647B2 ## CPC - H02N 2/0085: {Leads; Wiring arrangements} - G11B 5/483: {Piezoelectric devices between head and arm, e.g. for fine adjustment} - H02N 2/028: {along multiple or arbitrary translation directions, e.g. XYZ stages} - H02N 2/065: {Large signal circuits, e.g. final stages} - H10N 30/875: {Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins} - H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 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. ### Claim 6 (depends on 5) 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. ### Claim 7 (depends on 5) 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. ### Claim 8 (depends on 5) The actuated assembly of claim 5, wherein the at least one trace feature includes more than two elongated trace features arranged alongside one another. ### Claim 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. ### Claim 10 (depends on 9) The dual stage actuated assembly of claim 9, wherein the at least one depression feature includes a circular depression feature. ### Claim 11 (depends on 9) The dual stage actuated assembly of claim 9, wherein the at least one depression feature includes more than one torus depression features. ### Claim 12 (depends on 9) 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. ### Claim 13 (depends on 9) 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.