Laser cutting strengthened glass
Methods for cutting strengthened glass are disclosed. The methods can include using a laser. The strengthened glass can include chemically strengthened, heat strengthened, and heat tempered glass. Strengthened glass with edges showing indicia of a laser cutting process are also disclosed. The strengthened glass can include an electrochromic film.
1. A piece of cut thermally-strengthened glass comprising:
a thermally-strengthened glass substrate having a first surface, an opposing second surface, and a peripheral edge between the first surface and the second surface, the edge having indicia of a laser filamentation cutting process, wherein the indicia of a laser filamentation cutting process comprises a filamentation pattern defined by a series of regularly recurring substantially parallel filamentation traces.
2. The cut glass of claim 1 , wherein the peripheral edge of the strengthened glass has a modulus of rupture of greater than about 100 MPa and wherein the peripheral edge of the strengthened glass has a probability of failure of less than about 5% under a 40 MPa load and a Weibull modulus greater than 10.
3. The cut glass of claim 1 , further comprising a coating on the peripheral edge of the strengthened glass comprising metal, oxide material, or a polymer layer.
4. The cut glass of claim 1 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 75% of the thickness as detected by optical microscopy.
5. The cut glass of claim 4 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 90% of the thickness as detected by optical microscopy.
6. The cut glass of claim 1 , wherein each member of a plurality of the filamentation traces has a width ranging from about 0.5 microns to about 10 microns.
7. The cut glass of claim 1 , wherein each member of a plurality of the filamentation traces has a width ranging from about 1 micron to about 3 microns.
8. The cut glass of claim 1 , wherein a set of adjacent filamentation traces are separated by an average distance ranging from about 1 micron to about 30 microns.
9. The cut glass of claim 1 , wherein the filamentation pattern includes a plurality of filamentation traces detectable by optical microscopy wherein each member of the plurality of filamentation traces comprises a filamentation length and a filamentation width and an aspect ratio of greater than about 10:1 as defined by the ratio of the filamentation length to the filamentation width.
10. An electrochromic device comprising at least one strengthened glass substrate having a first surface, an opposing second surface and a peripheral edge between the first surface and second surface, the peripheral edge having indicia of a laser filamentation cutting process, wherein the indicia of a laser filamentation cutting process comprises a filamentation pattern defined by a series of regularly recurring substantially parallel filamentation traces.
11. The electrochromic device of claim 10 , wherein the peripheral edge of the strengthened glass has a modulus of rupture of greater than about 100 MPa and a probability of failure of less than about 5% under a 40 MPa load.
12. The electrochromic device of claim 10 , further comprising a coating on the peripheral edge of the strengthened glass comprising metal, oxide material, or a polymer layer.
13. The electrochromic device of claim 10 , wherein the indicia of a laser filamentation cutting process comprises an edge surface having an average surface roughness of not more than 5 microns root mean square.
14. The electrochromic device of claim 10 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 75% of the thickness as detected by optical microscopy.
15. The electrochromic device of claim 14 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 90% of the thickness as detected by optical microscopy.
16. The electrochromic device of claim 10 , wherein each member of a plurality of the filamentation traces has a width ranging from about 0.5 microns to about 10 microns.
17. The electrochromic device of claim 10 , wherein each member of a plurality of the filamentation traces has a width ranging from about 1 micron to about 3 microns.
18. The electrochromic device of claim 10 , wherein the filamentation laser traces are separated by an average distance ranging from about 1 micron to about 30 microns.
19. The electrochromic device of claim 10 , wherein the filamentation pattern includes a plurality of filamentation traces detectable by optical microscopy wherein each member of the plurality of filamentation traces comprises a filamentation length and a filamentation width and an aspect ratio of greater than about 10:1 as defined by the ratio of the filamentation length to the filamentation width.
20. An insulated glass unit comprising:
a first lite comprising a strengthened glass substrate having a first surface, an opposing second surface and a first peripheral edge between the first surface and second surface,
a second lite comprising a glass substrate having a first surface, an opposing second surface, and a second peripheral edge between the first surface and second surface,
a spacer element providing spatial separation between the first glass lite and the second glass lite,
at least one of first peripheral edge or the second peripheral edge having indicia of a laser filamentation cutting process, wherein the indicia of a laser filamentation cutting process comprises a filamentation pattern defined by a series of regularly recurring substantially parallel filamentation traces.
21. The insulated glass unit of claim 20 , wherein the peripheral edge of the strengthened glass has a modulus of rupture of greater than about 100 MPa, a probability of failure of less than about 5% under a 40 MPa load, and a Weibull modulus greater than 10.
22. The insulated glass unit of claim 20 , wherein the first lite further comprises an electrochromic material formed on the first lite.
23. The insulated glass unit of claim 20 , further comprising a coating on the peripheral edge of the strengthened glass comprising metal, oxide material, or a polymer layer.
24. The insulated glass unit of claim 20 , wherein the indicia of a laser filamentation cutting process comprises an edge surface having an average surface roughness of not more than 5 microns root mean square.
25. The insulated glass unit of claim 20 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 75% of the thickness as detected by optical microscopy.
26. The insulated glass unit of claim 25 , wherein each of such filamentation traces extends from the first surface toward the second surface to a depth of at least 90% of the thickness as detected by optical microscopy.
27. The insulated glass unit of claim 20 , wherein each member of a plurality of the filamentation traces has a width ranging from about 0.5 microns to about 10 microns.
28. The insulated glass unit of claim 20 , wherein each member of a plurality of the filamentation traces has a width ranging from about 1 micron to about 3 microns.
29. The insulated glass unit of claim 20 , wherein the filamentation laser traces are separated by an average distance ranging from about 1 micron to about 30 microns.
30. The insulated glass unit of claim 20 , wherein the filamentation pattern includes a plurality of filamentation traces detectable by optical microscopy wherein each member of the plurality of filamentation traces comprises a filamentation length and a filamentation width and an aspect ratio of greater than about 10:1 as defined by the ratio of the filamentation length to the filamentation width.