The manufacturing process for RFID tags typically involves several steps:

1. Creating the antenna - This is often done by printing conductive ink onto a substrate or etching copper from a foil.

2. Attaching the microchip - The tiny RFID chip is connected to the antenna, usually through a process called flip-chip bonding.

3. Encasing the components - The antenna and chip are enclosed in protective material like plastic or paper.

4. Testing - Each tag is tested to ensure it functions properly.

5. Encoding - The tag is programmed with its unique ID number.

The exact process can vary depending on the type of RFID tag (passive vs. active) and its intended application. Specialized equipment is required for mass production of RFID tags.