# US 2014/0191622 A1 · Piezoelectric component and method for producing a piezoelectric component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191622 A1 - Document ID: US20140191622A1 - Status: Published application - Kind: A1 - Application number: 14/151,956 - Filed: 2014-01-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Applicants: Robert Bosch GmbH - Inventors: Reinhold Melcher - Web page: https://patentgrep.com/patent/US20140191622A1 ## CPC - H10N 30/875: {Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins} - H10N 30/06: Forming electrodes or interconnections, e.g. leads or terminals - H10N 30/063: Forming interconnections, e.g. connection electrodes of multilayered piezoelectric or electrostrictive parts - H10N 30/874: {embedded within piezoelectric or electrostrictive material, e.g. via connections} - H10N 30/877: {Conductive materials} - H10N 30/871: {Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes} - Y10T 29/42: Piezoelectric device making - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A piezoelectric component (1), which serves particularly as a piezoelectric sensor or piezoelectric actuator, comprises a basic body (6) which has a first ceramic layer (7), a second ceramic layer (8) and an internal electrode layer (9). In this case, the internal electrode layer (9) is provided at least partially between the first ceramic layer (7) and the second ceramic layer (8). The basic body (6) has a bore (10) which is provided at least partially in the region of the internal electrode layers (9). Furthermore, an electrical contact element (13) is inserted at least partially into the bore (10) of the basic body (6) and is connected electrically at least indirectly to the internal electrode layer (9) in the bore (10). ## Claims ### Claim 1 A piezoelectric component (1) with a basic body (6) which has a first ceramic layer (7), a second ceramic layer (8) and an internal electrode layer (9), the internal electrode layer (9) being provided at least partially between the first ceramic layer (7) and the second ceramic layer (8), the basic body (6) having a bore (10) which is provided at least partially in a region of the internal electrode layer (9), and an electrical contact element (13) being inserted at least partially into the bore (10) of the basic body (6) and being connected electrically at least indirectly to the internal electrode layer (9) in the bore. ### Claim 2 (depends on 1) The piezoelectric component according to claim 1, characterized in that the electrical contact element (13) is fastened in the bore (10) of the basic body (6) by clamping. ### Claim 3 (depends on 1) The piezoelectric component according to claim 1, characterized in that the electrical contact element (13) is fastened in the bore (10) of the basic body (6) by means of an additive (16). ### Claim 4 (depends on 3) The piezoelectric component according to claim 3, characterized in that the additive (16) is in the form of an electrically conductive additive, and in that the electrical contact element (13) is connected electrically to the internal electrode layer (9) by means of the electrically conductive additive (16). ### Claim 5 (depends on 1) The piezoelectric component according to claim 1, characterized in that an axis (12) of the bore (10) is oriented at least approximately parallel to the internal electrode layer (9). ### Claim 6 (depends on 1) The piezoelectric component according to claim 1, characterized in that at least one further internal electrode layer (40) is provided, in that the bore (10) is provided at least partially in a region of the further internal electrode layer (40), and in that an axis (12) of the bore (10) is oriented at least approximately perpendicularly to the internal electrode layer (9) and to the further internal electrode layer (40). ### Claim 7 A method for producing a piezoelectric component (1) a green product (6) for a basic body (6) of the component (1) being produced, which has a first ceramic layer (7), a second ceramic layer (8) and an internal electrode layer (9) which is provided at least partially between the first ceramic layer (7) and the second ceramic layer (8), the method comprising forming in the basic body (6) a bore (10) which is provided at least partially in the region of the internal electrode layer (9), inserting an electrical contact element (13) at least partially into the bore (10) of the basic body (6), and connecting the electrical contact element at least indirectly to the internal electrode layer (9) in the bore (10). ### Claim 8 (depends on 7) The method according to claim 7, characterized in that the bore (10) is introduced into the green product (6). ### Claim 9 (depends on 8) The method according to claim 8, characterized in that the electrical contact element (13) is introduced at least partially into the bore (10) of the green product (6) directly, and in that the green product (6), together with the electrical contact element (13) introduced into the bore (10), is sintered, the electrical contact element (13) being fastened directly in the bore (10) of the basic body (6) by virtue of sinter shrinkage of the green product (6). ### Claim 10 (depends on 8) The method according to claim 8, characterized in that the electrical contact element (13) is introduced at least partially into the bore (10) of the green product (6) by means of a paste (16), and in that the green product (6), together with the electrical contact element (13) introduced into the bore (10) by means of the paste (16), is sintered, the electrical contact element (13) being fastened in the bore (10) of the basic body (6) by means of the additive (16) formed from the paste (16). ### Claim 11 (depends on 8) The method according to claim 8, characterized in that the green product (6), into which the bore (10) is introduced, is sintered, and in that the electrical contact element (13) is inserted at least partially into the bore (10) of the basic body (6) by means of an additive (16) after sintering, the electrical contact element (13) being connected to the basic body (6) in the bore (10) by means of the additive (16). ### Claim 12 (depends on 7) The method according to claim 7, characterized in that the green product (6) for the basic body (6) is sintered, and in that the bore (10) is formed in the basic body (6) after sintering.