ITO FAQs

Get the FAQs. . .

 

What is masked laser patterning?

 

There are two ways to laser pattern a circuit design (pattern) onto a semiconductor wafer or onto a thin film coating on a glass or plastic display substrate. These two are maskless and masked. An example of masked laser patterning is an excimer laser illuminating an entire (patterned) mask and projecting that pattern onto the coating to either ablate it directly or expose a photoresist coating on the thin film or onto a silicon semiconductor wafer. In the case of ablation its called direct write. In the case of photoresist its known as photolithography or as pattern generation.

 

 

Maskless laser patterning, on the other hand, is done by a solid state laser that ablates laser lines on the thin film TXO coating directly or exposes laser lines on photoresist which always requires additional processing steps such as stripping, etching and washing.

 

Masked laser patterning is a fast area process. Maskless by laser is a line process which is slow if the total length of all lines is long. Its fast if the sum total is short. Granted, that doesn’t say much. It’s all relative as the Great One said. We stand ready to help you decide on a case-by-case basis.

 

Laserod specializes in solid state direct write laser patterning by ablation. Please feel welcome to contact us for more information.

 

 

What does Laserod need to get started?

 

Our input from you is typically an AutoCad dxf file. We translate your AutoCad file to our drawing file which drives the laser motion subsystem.

 

Are there any “tricks” on the dxf we should know about?

 

Please note that our laser will follow all the lines drawn on your drawing. Therefore, anywhere there is a line drawn, our laser will remove ITO. We often see drawings showing where the ITO is to remain and thus we must redraw the pattern or have it redrawn.

 

What if all we have is a sketch and we cannot prepare an AutoCad dxf drawing?

 

A sketch will work if the files specified above are not available. For a reasonable fee we can draw your pattern for you.

 

Do you have any suggestions on how to prepare a pattern for laser generation?

 

Quidelines for the AutoCad Designer:

 

Lines on your drawing define the path of the centerline of the laser scribe. Each AutoCad line will become a laser scribe; a line in the drawing dictates ITO removal. Closed polylines work best and therefore a negative of a typical drawing is required. If there are fiducials, they can either be laser drilled or laser scribed. A laser line is a series of overlapping laser spots laid down tens to hundreds of thousands per second. And noted above, TCO spaces are laser lines. Areas to be isolated can be simply cut out with a laser box around the perimeter of the area to be isolated or “hogged out” at high speed. And finally of designer interest is we prefer a simple one level AutoCad file.

 

Laserod excels in laser patterning and structuring.