Next Work
I started a company – And we’re hiring https://fab2.com/ Contribute to the open source project – HackerFab. Join the Discord http://hackerfab.org
Sam Zeloof
Latest posts
Second IC :)
Homemade 1000+ transistor array chip In 2018 I made the first lithographically fabricated integrated circuits in my garage fab. I was a senior in high school when I made the Z1 amplifier, and now I’m a senior in college so there are some long overdue improvements to the amateur silicon process. The Z1 had 6 transistors and was a … Continue reading Second IC :)
DIY Photoresist – Notes on Poly(vinyl cinnamate) synthesis
***DISCLAIMER*** this project is incomplete and the write-up is intended only to save someone a little time who is attempting to explore this topic on their own. I only spent about 2 weeks working on this during winter break from school and also I did very poorly in the organic chem unit in high school which is the extent … Continue reading DIY Photoresist – Notes on Poly(vinyl cinnamate)…
Microelectromechanical Systems (MEMS) Fabrication
Homemade Silicon MEMS The term MEMS was first coined in the 1980s and has since brought tons of innovative/insane fabrication techniques and incredible devices. Among my favorite examples of this is the DLP technique invented by TI and a DNA nanoinjector for cells made at BYU (pictured below). Obviously, I won’t be making anything this … Continue reading Microelectromechanical Systems (MEMS)…
Memristive Devices and Fabrication
Homemade Memristors Memristors are interesting devices first posed by Leon Chua in 1971 as the 4th basic circuit element, after the resistor, capacitor, and inductor. It would theoretically satisfy a relationship between charge and flux, and in simple terms is a 2-terminal device whose instantaneous resistance depends on the device’s electrical past (total charge or current that has … Continue…
E-beam Lithography
I modified my JEOL scanning electron microscope to not only image tiny things, but make tiny things too. This technique is called Electron Beam Lithography. Normally, a SEM works by scanning a beam of electrons over the sample and detecting secondary electrons. In this case, I built a PC scan controller that “drives” the electron beam … Continue reading E-beam Lithography
Superconductor Sputtering Chamber
This project involved developing a sputtering system in collaboration with Ilya Drozdov in the Oxide Molecular Beam Epitaxy / Condensed Matter Physics Group at the Brookhaven National Laboratory. This system has 2 process gas feeds, an infrared substrate heater, and is designed for low-rate coatings that last 2 weeks each. You can see other services that I offer here The … Continue reading…
SiO2 Patterning
In IC fabrication it is necessary to deposit/grow and etch insulating layers of Silicon Dioxide. This presents a few problems for standard photolithographic patterning because SiO2 is hydrophilic which can cause photoresist adhesion issues and also the HF etchant attacks most photoresists. These issues combine to leave you with poor pattern definition and often complete photoresist lifting ……
First IC :)
Homemade computer chips / integrated circuits Preface I am very excited to announce details of the first homemade integrated circuit and share the journey that this project has taken me on over the past year. I hope that my success will inspire others and help start a revolution in home chip fabrication. When I set out on this … Continue reading First IC :)
Mark IV Maskless Submicron Photolithography Stepper
Details and photos of my newest maskless photolithography stepper have been posted here: Info Page Automated DLP submicron stepper for 2″ (50mm) wafers with LabView control, computer alignment, and wafer vacuum chuck. Based on an old Nikon microscope with custom optics and in-situ UV-VIS spectroscopy for illumination process control. Diffraction-limited resolution is <250nm with a 365nm light ……