7" Soda Lime Photomask Blank
Low Reflective Chrome OD3 Photomask Blank
7" x 7" x 0.120" (L x W x D)
Soda Lime Glass , AZ1500 @ 5300A
Soda lime, quartz, borofloat, borosilicate, White Crown, Corning, and B270 are just a few of the substrate materials offered. While all standard square sizes are available, custom sizes can also be cut, beveled (seamed), cleaned and prepared for metallization.
Photo resist coating is available for all standard, and most custom, size substrates. Spinning is the method used to apply the photo resist. Photo resist coatings used are AZ1518 and AZ TFP650 both are available in thicknesses of 5300A and 10,000A.
This product is a photomask blank a plane of soda lime glass lapped and polished, then coated with Low Reflective OD3 chrome, and further coated with AZ1500 photoresist @ 5300A thickness.
Stock is dependant upon availability at the time.
Soda Lime Glass is the most common substrate used for masks, due to its good quality/price ratio. The glass is optically good, very flat and has no imperfections. If used in a photo-lithographic process, glass can be used with a very wide variety of light sources from 350nm upwards, with an excellent UV transparency. Soda Lime glass has a thermal co-efficient expansion of 93 (10-7) which is approxomately 10 ppm (parts per million) , and a transmittance value of 88% at 375-450nm, with a glass flatness class of 5um for the smaller plates and 10um for the larger plates. Some of the very big plates of 14" and above, may have a bigger flatness tolerance. We would recomend always using Soda Lime glass where it is suitable.
- Soda Lime Optical transmission of visible light = 88%
- Soda Lime Optical transmission of visible light = 250nm
- Soda Lime thermal expansion co-efficient = 95 ppm (parts per million)
Q: Can i buy just one ?
A: Sorry, packaging requirements means that we can only sell the plates in larger quantities of either a full, or half , box.
Q: Can i order anytime from stock ?
A: Because these are low volume products from our production process, they may not always be available. Please enquire first if your need is urgent.
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