# US 2019/0318893 A1 · Magnetically actuated mems switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318893 A1 - Document ID: US20190318893A1 - Status: Published application - Kind: A1 - Application number: 16/377,418 - Filed: 2019-04-08 - Published: 2019-10-17 - Earliest claimed: 2018-04-11 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Akifumi KAMIJIMA; Atsushi IIJIMA; Kyung-Ku CHOI; Katsunori OSANAI; Daisuke IWANAGA - Web page: https://patentgrep.com/patent/US20190318893A1 ## CPC - H01H 47/001: {Functional circuits, e.g. logic, sequencing, interlocking circuits} - H01H 50/005: {using micromechanics} - H01H 50/18: Movable parts of magnetic circuits, e.g. armature - H01H 50/36: Stationary parts of magnetic circuit, e.g. yoke - H01H 50/44: Magnetic coils or windings - H01H 50/54: Contact arrangements - H01H 50/645: {intermediate part making a resilient or flexible connection (H01H50/66 - H01H50/74 take precedence)} - H01H 1/54: by magnetic force {(combined with electrodynamic opening H01H77/101)} - H01H 2001/0078: {with parallel movement of the movable contact relative to the substrate} - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract A magnetically actuated MEMS switch 100 includes a first magnetic core portion 120, a first signal line 15, a first contact point 16, a second magnetic core portion 220, a second signal line 25, a second contact point 26, and a first coil portion 111 and a second coil portion 211 serving as a magnetic field applying portion that causes a current to flow in conductor coil to apply a magnetic field to the first magnetic core portion 120 and the second magnetic core portion 220. The first contact point 16 is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion. Connection and disconnection between the first contact point 16 and the second contact point 26 are switched in response to displacement of the first contact point 16. ## Claims ### Claim 1 A magnetically actuated MEMS switch comprising: a first magnetic core portion; a first signal line that is provided in the first magnetic core portion; a first contact point that is fixed to one end of the first magnetic core portion and is electrically connected to the first signal line; a second magnetic core portion; a second signal line that is provided in the second magnetic core portion; a second contact point that is fixed to one end of the second magnetic core portion and is electrically connected to the second signal line; and a magnetic field applying portion that includes a conductor coil and causes a current to flow in the conductor coil such that a magnetic field is applied to the first magnetic core portion and the second magnetic core portion, wherein the first contact point is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion, and wherein connection and disconnection between the first contact point and the second contact point are switched in response to displacement of the first contact point. ### Claim 2 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the first magnetic core portion includes a flexible magnetic core portion that is provided between the one end to which the first contact point is fixed and the other end opposite to the one end, and that has flexibility with respect to an external force in a direction in which the one end intersects an extending direction of the one end. ### Claim 3 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the second contact point is displaced depending on the presence or absence of a magnetic field applied by the magnetic field applying portion, and wherein connection and disconnection between the first contact point and the second contact point are switched in response to displacement of the first contact point and the second contact point. ### Claim 4 (depends on 3) The magnetically actuated MEMS switch according to claim 3, wherein the second magnetic core portion includes a flexible magnetic core portion that is provided between the one end to which the second contact point is fixed and the other end opposite to the one end, and that has flexibility with respect to an external force in a direction in which the one end intersects an extending direction of the one end. ### Claim 5 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the first contact point and the second contact point are separated from each other when there is no magnetic field applied by the magnetic field applying portion and are electrically connected to each other when there is a magnetic field applied by the magnetic field applying portion. ### Claim 6 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the first contact point and the second contact point are separated from each other when there is a magnetic field applied by the magnetic field applying portion and are electrically connected to each other when there is no magnetic field applied by the magnetic field applying portion. ### Claim 7 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the first magnetic core portion functions as the first signal line, or the first signal line and the first contact point. ### Claim 8 (depends on 1) The magnetically actuated MEMS switch according to claim 1, wherein the second magnetic core portion functions as the second signal line, or the second signal line and the second contact point.