Antenna with micro-transfer-printed circuit element

1. An electromagnetic communication device, comprising:

a device substrate;

an antenna formed on or in the device substrate; and

a circuit element comprising an electrical circuit and one or more electrically conductive connection posts protruding from a surface of the circuit element, each of the connection posts electrically connected to the electrical circuit and at least one connection post electrically connected to the antenna,

wherein the circuit element is a chiplet having at least one of a length and a width that is less than 200 microns and comprises a fractured tether.

2. The communication device of claim 1 , wherein the antenna is a cured ink, a metal foil, or is laminated to the device substrate.

3. The communication device of claim 1 , wherein the antenna has a surface and at least one of the connection posts: is deformed, is in contact with the antenna surface, is embedded in the antenna surface, or pierces the antenna surface.

4. The communication device of claim 1 , comprising a wire on or in the device substrate, the wire electrically connected to the antenna, and wherein the connection post is in contact with, is embedded in, or pierces the wire.

5. The communication device of claim 4 , wherein the circuit element is a chiplet having at least one of:

at least one of a length and width that is less than or equal to 100 microns, and

a thickness less than or equal to 20 microns.

6. The communication device of claim 1 , wherein the electrical circuit comprises one or more of an electrical conductor, a capacitor, a resistor, a transistor, a diode, and an integrated circuit.

7. The communication device of claim 1 , wherein the communication device is a radio frequency identification device (RFID) or a near-field communication (NFC) device.

8. The communication device of claim 1 , wherein the device substrate comprises markings, is a label, or is an adhesive label.

9. The communication device of claim 1 , wherein the device substrate is flexible and the connection post is rigidly affixed to the antenna or device substrate.

10. The communication device of claim 1 , wherein the device substrate is flexible and the circuit element is adhered to the antenna or device substrate.

11. The communication device of claim 1 , wherein the antenna is a multi-layer spiral loop antenna comprising a first end and a second end and an even number of antenna spiral loop layers, and wherein both of the first and second ends of the antenna are closer to the center of the spiral than the edge of the spiral.

12. The communication device of claim 1 , wherein the antenna is a loop antenna with first and second ends, the circuit element comprises at least first and second connection posts, and the first connection post is electrically connected to the first end of the antenna and the second connection post is electrically connected to the second end of the antenna.

13. A method of making an electromagnetic communication device, comprising:

providing a device substrate comprising an antenna formed on or in the device substrate;

providing a circuit element comprising an electrical circuit, a fractured tether, and one or more electrically conductive connection posts protruding from a surface of the circuit element, each of the connection posts electrically connected to the electrical circuit, wherein the circuit element is a chiplet having at least one of a width and a length of less than 200 microns; and

electrically connecting at least one of the one or more connection posts to the antenna.

14. The method of claim 13 , comprising:

providing a source wafer comprising one or more micro-transfer printable chiplets; and

micro-transfer printing the one or more micro-transfer printable chiplets from the source wafer onto the device substrate,

wherein the circuit element comprises at least one of the one or more chiplets.

15. The method of claim 13 , comprising:

providing one or more micro-transfer printable circuit elements; and

micro-transfer printing the one or more micro-transfer printable circuit elements onto the device substrate so that at least one connection post of at least one of the one or more circuit elements is embedded in the antenna, pierces the surface of the antenna, or is deformed and in contact with the antenna.

16. The method of claim 13 , comprising adhering the circuit element to the device substrate with an adhesive.

17. The method of claim 13 , comprising heating at least a portion of the device substrate.

18. The method of claim 13 , comprising providing a source wafer comprising one or more micro-transfer printable chiplets and an intermediate substrate, micro-transfer printing the one or more micro-transfer printable chiplets from the source wafer to an intermediate substrate in order to form the circuit element, and micro-transfer printing the circuit element to the device substrate.

19. The method of claim 18 , comprising:

forming connection posts on the intermediate substrate; and

electrically connecting the one or more connection posts to the one or more chiplets.

20. The method of claim 18 , wherein the intermediate substrate comprises a plurality of circuit elements and the intermediate substrate has an area that is equal to or larger than the area of the device substrate.