CMOS NAND-Gate Transistor Model
CMOS NAND-Gate Transistor Model
3D
Published 2017-08-21T10:57:38+00:00
Have you ever wondered what a processor looks like from the inside? If you have ever worked with the topic, you know that a digital circuit is built from small building blocks, so-called "gates". To make design of large digital chips easier, these gates are provided as standardized cells, which can be placed on the chip to make up the desired circuit. This is a model of the favorite gate in modern CMOS-technology: the NAND or inverted AND gate.
Read more about the technology behind it on Wikipedia: https://en.wikipedia.org/wiki/NAND_gate. This page also has the physical layout based on which I designed this model.
If you have any issues with the model or need adjustments for you printer, let me know!
To make this look awesome, you need 5 different colors (you don't need a multimaterial printer though). I recommend silver for the metal parts (vdd.stl, vss.stl, via.stl and out.stl), the other parts can be printed in whatever colors you like, but the bottom left "welltap.stl" and the top right "diff_p.stl" as well as the top left "welltap.stl" and the bottom right "diff_n.stl" should be the same color. The two "poly.stl" should also be the same color.
In total you need these parts:
- 1x bulk.stl
- 1x vdd.stl, vss.stl and out.stl
- 2x welltap.stl (in 2 different colors)
- 1x diff_n.stl
- 1x diff_p.stl
- 2x poly.stl
- 7x via.stl
I printed everything in 5 prints:
- bulk.stl (white PLA, upright, 15% infill, ~3h)
- welltap.stl + diff_p.stl (red PLA, flipped, 10% infill ~20min)
- welltap.tl + diff_n.stl (yellow PLA, flipped, 10% infill, ~20min)
- poly.stl (green PLA, flipped, 15% infill, ~30min)
- vdd.stl + vss.stl + out.stl + 7x via.stl (silver PLA, flipped, 15% infill, ~1.5h)
Everything should just snap together, but I added some glue to make it more stable. The connections on the poly-blocks are very thin, so some printer might have problems. Just glue them straight to the surface in that case.
| Date published | 21/08/2017 |
| Dimensions | 75mm x 120mm x 27mm |
| Technology | FDM |
| Complexity | Very Easy |
| Support Free | YES |