Gorilla Glass Dicing and Cutting

For machining of hard transparent materials, picosecond lasers offer many advantages over other tools due to the non-thermal ablation process. Chemically strengthened glasses such as
cannot be succesfully machined with typical mechanical or laser cutting tools.

Using industrial picosecond lasers such as the Attodyne APL series, material removal can be accomplished with various wavelengths, e.g. 1064nm, 532nm or 355 nm with highest speed at 1064 nm and best quality at <532nm .

Highest precision cuts can be achieved with edge quality better than <10μm chipping size and fast linear cutting speed. E.g. 0.7 mm thick Gorilla glass 0.02 mm/(s.W).

Material removal rate ranges from 0.1-0.5mm³/(min.W) depending on 3D geometry.

Straight features can be quickly cut by scribing and breaking process.

Curved thru cuts, and volume removal is best done with multiple passes using a fast beam scanning system.

See below for some examples of Glass machining:

Processing examples:

1. Small Thru hole in 0.55mm thick gorilla glass no gas assist or post-processing. Hole taper shown is < 8deg, achieved using f-theta lens and galvo. Such holes can be cut in parallel over a large area.

Input and output hole profile

2. Square corner slot n 0.7 mm thick gorilla glass. 4x1mm slot is cut in at 0.3 mm^3/min*W.

3. Combined Curved and Square Cut-out:

4. Large thru hole in 0.7mm thick Gorill Glass. Cut time ~ 3min@3W (left) 10cm holes in 0.8mm Gorilla Glass. (right top) edge under 50x magnification (right bottom) edge under 5x magnification.