Related youtube video: https://youtu.be/XrEC2LGGXn0
On Tue, Dec 31, 2019, 05:15 David Lanzendörfer leviathan@libresilicon.com wrote:
Hi Pavel
One one micron mask set can cost between two thousand US dollar and upwards (depending on the amount of layers), but this cost will increase drastically as soon as you go below one micron.
Additionally there are multiple draw backs about mask sets which could be eliminated when using a mask less lithography system.
For instance, you only can expose one pattern using a stepper, and even if you only have a hand full of prototypes to manufacture, you will still end up paying the costs for the mask sets, even if you do only one single wafer.
In addition the loading and unloading of the masks into the stepper aligner is time consuming.
Having a display just switch between layouts during exposure allows for an arbitrary amount of prototype chips without the need for manufacturing masks.
This BTW also reduces another attack vector from Andrew (Bunnie) Huang, which he mentioned during his congress talk.
Cheers -lev
On Tuesday, 31 December 2019 8:38:25 PM HKT pavel@noa-labs.com wrote:
Are 1um masks that expensive (compared to the rest of setup)? Or is it
has
more to do with turnaround times?
Can you share details of a light source and resist? One important thing
will
be to pick light source that will not burn the LCD matrix, and will not
be
absorbed by the glass much. Making a custom made LCD with special
materials
might not be that cheaper that sticking with masks for the beginning.
It will be truly great if one can just replace the mask with LCD with no extra work
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