Apple Uses Microscopic QR Codes to Track iPhone Screens and Reduce Defects

Apple places two microscopic QR codes on iPhone displays to track production.

The QR codes help Apple identify defective screens made by suppliers.

Apple uses laser scanning equipment to read the codes during production.

The QR codes save Apple millions by reducing defective screens.

The codes are etched on the glass screens made by Lens Technology and Biel Crystal.