# US 2018/0025192 A1 · Electronic identification document > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025192 A1 - Document ID: US20180025192A1 - Status: Published application - Kind: A1 - Application number: 15/644,863 - Filed: 2017-07-10 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: Infineon Technologies AG - Applicants: Infineon Technologies AG - Inventors: Frank Pueschner; Jens Pohl; Thomas Spoettl; Peter Stampka - Web page: https://patentgrep.com/patent/US20180025192A1 ## CPC - G06K 7/10366: {the interrogation device being adapted for miscellaneous applications} - G06K 19/0723: {the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs} - G06K 19/07345: {by activating or deactivating at least a part of the circuit on the record carrier, e.g. ON/OFF switches} - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract An electronic identification document is provided. The electronic identification document may include a carrier, an identification element, a microwave interaction structure configured to interact with microwave radiation, and an alteration element, wherein the alteration element may be part of or in contact with the microwave interaction structure and may be configured to alter, upon interaction of the interaction structure with microwaves, its state from an initial state to a permanent altered state, wherein the permanent altered state may differ from the initial state by a change of the alteration element in color, brightness, saturation, and/or transparency. ## Claims ### Claim 1 An electronic identification document, comprising: a carrier; an identification element; a microwave interaction structure configured to interact with microwave radiation; and an alteration element, wherein the alteration element is part of or in contact with the microwave interaction structure and is configured to alter, upon interaction of the interaction structure with microwaves, its state from an initial state to a permanent altered state; wherein the permanent altered state differs from the initial state by a change of the alteration element in color, brightness, saturation, and/or transparency. ### Claim 2 (depends on 1) The electronic identification document according to claim 1, wherein the electronic identification document is optically at least partially transparent at least in a region extending from the alteration element to at least one main surface of the carrier. ### Claim 3 (depends on 2) The electronic identification document according to claim 2, wherein a size of the alteration element parallel to the at least one main surface of the electronic identification document is at least 0.2 mm. ### Claim 4 (depends on 1) The electronic identification document according to claim 1, wherein the alteration element comprises plastics. ### Claim 5 (depends on 1) The electronic identification document according to claim 1, further comprising: a chip. ### Claim 6 (depends on 1) The electronic identification document according to claim 1, wherein the alteration element is embedded in the carrier. ### Claim 7 An electronic identification document, comprising: an electronic identification element; and a microwave interaction structure configured to interact with microwave radiation and comprising an alteration element, wherein the alteration element is configured to alter, upon interaction of the interaction structure with microwaves, its state from an initial state to a permanent altered state; wherein the microwave interaction structure is electrically insulated from the electronic identification element; and wherein the permanent altered state differs from the initial state by a change of the alteration element in inductivity, capacity and/or electrical resistance. ### Claim 8 (depends on 7) The electronic identification document according to claim 7, further comprising: a carrier; wherein the microwave interaction structure is embedded in the carrier. ### Claim 9 (depends on 7) The electronic identification document according to claim 7, wherein the microwave interaction structure comprises a structured metal layer. ### Claim 10 (depends on 9) The electronic identification document according to claim 9, wherein the structured metal layer has a thickness of less than 100 nm. ### Claim 11 (depends on 7) The electronic identification document according to claim 7, wherein the microwave interaction structure comprises a metal layer having at least one broad region and at least one narrow region, wherein a width of the at least one broad region parallel to a main surface of the electronic identification document is larger than a width of the at least one narrow region. ### Claim 12 (depends on 11) The electronic identification document according to claim 11, wherein a ratio of the widths of the at least one broad region and the at least one narrow region is 5 or larger. ### Claim 13 (depends on 7) The electronic identification document according to claim 7, wherein the microwave interaction structure is arranged at a distance of less than 5 mm to the electronic identification element. ### Claim 14 (depends on 8) The electronic identification document according to claim 8, wherein the microwave interaction structure is arranged between the electronic identification element and a main surface of the carrier. ### Claim 15 (depends on 7) The electronic identification document according to claim 7, wherein the electronic identification document is configured to enable a determining of the inductivity, capacity and/or electrical resistance of the alteration element from an outside of the electronic identification document.