Laser marking process

摘要

A manufacturing method for sapphire crystal material is disclosed, including a laser-etched bar code formed into the interior of the sapphire crystal material. The laser-etched bar code may be associated with one or more manufacturing parameters or other manufacturing data. The sapphire crystal may be used to create a cover sheet for use with a display screen of a portable electronic device.

主权项

1. A method for manufacturing a cover sheet for a display of a portable electronic device, the method comprising:
growing a synthetic single-crystal sapphire boule; cutting the synthetic single crystal sapphire boule into a brick portion; slicing the brick portion into a single-crystal sheet having an upper surface and a lower surface; forming a laser mark on a portion of the interior of the single-crystal sheet between the upper surface and the lower surface, wherein the laser mark includes encoded information; and after forming the laser mark, polishing the upper and lower surfaces of the single crystal sheet to form the cover sheet.