Questions tagged [lithography]
5 questions
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Does PCB positive photoresist and related chimistry deteriorate over time (without usage)?
For creating PCBs, I use the following process:
Project the layout on a PCB (with a pre-applied positive photoresist layer)
Reveal the mask with sodium metasilicate pentahydrate saturated solution
Etching with Na2Si2O8 solution
Clean the mask with…
Adrian Maire
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How do you make M2 Ultra with lithography?
The M2 Ultra chip is unusual not because it's a single chip made of two halves, but because the halves are centrosymmetric images of each other instead of translation. Assuming the wafer is exposed first for the odd-numbered patterns, flipped 180…
Meatball Princess
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Can laser-induced graphene wires produce electromagnetic fields if a current is passed through them?
For those who don't know, laser-induced graphene (LIG) is a porous type of graphene that appears after exposing certain types of carbon-based materials with a laser.
In this video, they made LIG on Kapton tape using a cheap 400 nanometer laser…
Fulano
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If silicon wafers can only be made round, why are the chips we make not hexagons instead of squares to cover the edges more efficiently?
The thread is closed but the logic still checks out. Hexagons, octagons, etc. are more efficient to fill a circle than squares.
If a transistor has three leads shouldn't it be a triangle?
6 triangles make a hexagon right?
Closed Reddit thread that…
kpie
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What are some good Figures of Merit for different lithography techniques?
Could someone explain what figures of merit can be applied to lithography techniques such as DPN and LON?
