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I recently attended a Salesforce World Tour. As part of being identifiable and being marketable you get this ID card that the exhibitors scan, so that they can get your name, company, email and whatnot. I was curious as to what chip or antenna is in this card. So I cut it in several strips in the hope to find something, but all I can see is solid plastic.

Where is the 'identifier'? Is the actual chip or antenna so thin that I can't make it out with my naked eye? Or is there another hardware piece that I haven't found yet?

If it helps, here are two images. First one shows the card cut in stripes in the hope to locate something that identified me at the booths. The card cut in stripes

The second image shows the cross cut section of one of the middle pieces. I've left it in the original's resolution, but it doesn't seem to reveal anything. Cross cut section of one of the middle pieces of the card

  • It would be an RFID chip. – forest Apr 10 '18 at 6:52
  • Thanks, but where could it be? I wasn't able to see anything in the strips. They basically all look like the one in the second photo. – Alex Ixeras Apr 10 '18 at 6:54
  • A typical passive RFID chip can be as small as 1mmx1mm. You'll need to cut up your card much smaller than what you show in the image to have a chance of finding them. – Lie Ryan Apr 10 '18 at 7:10
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    It's located at one of the corners learn.adafruit.com/rfid-iphone/dissolve-the-card – Shiji.J Apr 10 '18 at 7:22
  • @AlexIxeras try using acetone to dissolve it. The link shard by the guy above does suggest a good method of "melting" the card and revealing the chip. – sir_k Apr 10 '18 at 8:09

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