The extra thin printed circuit means the thickness of printed circuit board is more thin than normal PCB. For most of FR4 PCB, Min thickness is 0.3mm or 0.4mm, whatever it is 1L or 2L. For 4L, it will be more about 0.6mm. But sometimes, limited to space or margin, or needed by design purpose, people needs extra thin such as 0.25mm, 0.20mm, or even 0.15mm board to used in such as SIM card, sensor card, and so on. Extra thin FR4 PCB can be bendable similar like a flexible circuit, but the cost will be cheaper.

We can make FR-4 thin boards with 0.1mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm, with or without the solder mask and copper thickness 1/2OZ, 1OZ.

As NFC and RFID technology widely used, the extra thin PCB are mainly applied for RFID coil antenna, RFID intelligent sensing industry, communications and electronic tags and other fields.