Converting

What Is NFC Converting?

ConvertingConvertingTransforming NFC inlays into finished tag productsView full → is the final manufacturing stage that transforms raw NFC inlays into finished end-user products. This process encompasses applying printed labels over wet inlays, laminating dry inlays into card bodies, embedding inlays into wristbands and key fobs, and integrating NFC components into product packaging. Converting is where functional NFC components become tangible products that consumers interact with.

Converting Processes

Different end products require different converting techniques:

Label and Sticker Converting

The most common converting process turns wet inlays into NFC stickers and labels:

1. Inlay supply. Wet inlays arrive on rolls with adhesive backing and release liner, spaced at regular intervals.

2. Label overlamination. A pre-printed label face (paper, synthetic, or clear film) is laminated over the inlay, sandwiching the NFC chip and antenna between the label face and the adhesive backing.

3. Die-cutting. A rotary or flatbed die cuts the finished label to the desired shape (circles, rectangles, custom shapes) while leaving the release liner intact for easy peeling.

4. Waste removal (stripping). The excess label material between the cut shapes is removed, leaving individual NFC stickers on the liner roll.

5. Quality inspection. Finished stickers undergo visual inspection and NFC functional testing using inline reader stations.

Card Converting

Smart card converting is a more complex process that embeds dry inlays within rigid card bodies:

1. Card body layup. Multiple layers of PVC, PET-G, or polycarbonate are arranged in a stack with the dry inlay centered in the designated layer.

2. Lamination. The stack is placed in a lamination press at 130-160 degrees Celsius and 100-200 bar pressure for several minutes. The layers fuse into a solid, uniform card.

3. Cooling. The laminated sheet is cooled under pressure to prevent warping and ensure dimensional stability.

4. Punching. Individual cards are punched from the sheet to the ISO 7810 ID-1 standard size (85.6 x 53.98 mm).

5. Personalization. Cards are printed (offset, digital, or retransfer), optionally magnetic stripe encoded, laser engraved, and NFC encoded with individualized data.

Converting Challenges

Several factors can degrade NFC performance during converting:

Mechanical stress. Die-cutting and lamination apply forces that can crack the IC die or break bond connections. Converters must carefully control cutting pressure and lamination parameters.

Metal interference. Metallic inks, foil stamps, or metallic packaging materials near the antenna can detune the NFC circuit. Antenna design must account for the materials in the finished product.

Temperature. Lamination temperatures above the chip's rated maximum can damage EEPROM data or the die itself. Process temperatures must stay within the chip's specified operating range.

Testing. 100% post-converting NFC testing is essential. Industry-standard defect rates for premium NFC products are below 0.1%, achieved through inline testing and automated rejection of defective units.