Hello, I just have a new UV lamp and trying to make some soft-lithography. However, I don't know which companies are printing photomasks in US. I wonder if somebody can give me some contacts? The best is from North East area. Thank you.
This is a better question for linkedin (see group Lab on a chip and Microfluidic Devices (a.k.a., Microfluidics)). You'll be bombarded with offers. Trianja is one. Also see http://www.fineline-imaging.com
Based on resolution u might wanna try some basic laser for making simple molds for prototypes before making masks.
Hello Long,
What feature sizes are you looking for and what mask size?
It may well be worth broadening your search outside of the US- there are many competitive EU suppliers of photomasks. Even with the increased postage cost I imagine there could be some competitive offers.
All the best,
Jules
I guess you are planning for some features of minimum size 10 microns or more. This guess is because you mentioned that you will be using a UV lamp and not any Mask Aligner. In that case if you want to have a cost effective solution, go for printing patterns on plastic sheet (the same way as we prepare slides for old OHP projectors). There are printers available with a resolution of 2500 dpi or more and are commonly available. I dont know it will suit your application or not..but it is one of the methods that we tried and succeeded..!!
Thanks guys for the answers. I need to print channels of 10 micron or more. So, there should be plenty of companies out there.
Hey Jose, your solution should be reasonable, I just wonder why people don't make thing simple that way. Just print on a transparency. But 2500 dpi supposedly not being able to get down to 10 um. For 10 um, should be 16000 dpi.
2500 dpi means a single dot will be having a size just more than 10 um. In this case you cant rely much on the accuracy of features that are below 50 um. If 16000 dpi printers are available, you will be able to print 10 um patters with decent accuracy. Also make sure that the plastic sheets that you use are clean and scratch free.
Best wishes
Jose
Further to Jose's suggestion of photofilms,
I have successfully used 'hi-res' film masks from Micro Lithography Services Ltd. (link below) for processes that have much larger features. They offer a fast service at very affordable prices.
We successfully managed to create 10 um interdigitated electrodes using these films. I did also test a 5 um pattern, but personally I felt that with the long features the edge quality started to deteriorate.
http://www.microlitho.co.uk/
You can go for Selba (see link below). They can easily proceed 25000 and 50000 dpi, which we used succesfully for mcrostructures down to few microns.
http://www.selba.ch/
There prices are relatively low.
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