Hi Hyuk-Jeen,
our company Laser Light Technologies (please see, our web @ www.laserusa.com )
has a lot of expertise in 2D, OCR fonts and barcode marking of Silicon wafers.
We use Cognex system to read codes after marking for verification. We will be
glad to provide you with samples. Please, contact me with any further
questions
Regards,
Alex Pozdin,
Director of Engineering
5 Danuser Dr.
Hermann, MO 65041 USA
ph. 573-486-5500
fax 573-486-5540
e-mail: apozdin@laserusa.com