Laser Cutting Silicon Wafer

[JamMastaJew]

Do you have any recommendations for cutting silicon? We have a 75 Watt CO2 laser and on lowest speed/highest power it's barely marking the surface.

[BarsMOnster]

@JamMastaJew You should have known that CO2 laser emit IR light, and Si is completely transparent at 10um band. You need laser of visible wave-length.

[lexichronicle2]

@BarsMOnster the upper limit of the transparency for silicon is 9um. it becomes more opaque as you leave the IR spectrum and head towards microwaves

[BarsMOnster]

@lexichronicle2 Yes, not completely transparent but 500 micron layer absorb quite little. I've seen Si wafers used in CO2 lasers meant to be transparent.

[cbaker9552]

Check us out University Wafer for your wafer needs

[randersonwlsc]

Hi edercarneiro. We have a customer thats cut pre-printed patterns for flat pack power supplies.

[edercarneiro]

Nice one. I just didn't realize why make a circle on the waffer. Why do they do that?

[tonychen92]

Great