Table of Contents
How can I make a transistor?
Easy n-Channel Transistor
- Start with p-doped silicon.
- Grow thin silicon dioxide layer.
- Deposit nitride layer.
- Apply photoresist polymer.
- Bring in mask.
- Turn off regular light.
- Expose to UV light.
- Turn on regular light.
What can I use instead of a diode?
A BJT with collector and base shorted can act as a diode. Where base-emitter junction provides the built-in potential and collector helps in current flow when applied voltage is higher then Base-Emitter built-in voltage. Similarly A MOSFET also behaves as a diode when gate and drain are connected.
What materials are used to make diodes?
Today, most diodes are made of silicon, but other semiconducting materials such as gallium arsenide and germanium are also used.
How can we make a transistor from a diode?
No, two diodes connected back to back cannot be used as a transistor. A PN diode will have equal doping on both sides, but for a transistor, the base must have the least doping level and the emitter must be highly doped. Joining two diodes will make the base size larger than the emitter and the collector.
How is a diode made?
A diode is formed by joining two equivalently doped P-Type and N-Type semiconductor. At the point of contact of the P-Type and N-Type regions, the holes in the P-Type attract electrons in the N-Type material. Hence the electron diffuses and occupies the holes in the P-Type material.
What can we use instead of transistor?
The most obvious alternatives to transistors are vacuum tubes and electromechanical relays. In addition, magnetic amplifiers (magamps) are useful. Piezoelectric relays are rare. Rotating amplifiers, such as amplidyne motor-generator machines are useful at higher power levels.
Can you use a LED in place of a diode?
Yes, an LED works as a photo diode (as do most diodes) but are always packaged so as to admit light. So if you need a rather poor photo-diode, you can use an LED, and if it is good enough for the application, then it will likely be cheaper than a “real” photo diode that is made in much lower quantities.
Which semiconductor material is used to make diodes?
silicon
A diode made of semiconductor components, usually silicon. The cathode, which is negatively charged and has an excess of electrons, is placed adjacent to the anode, which has an inherently positive charge, carrying an excess of holes.
Can you make semiconductor at home?
It’s relatively easy to make some semiconductor devices at home. You can make a diode with a cat’s whisker and a galena crystal, or oxidize some copper. Perhaps better in Vf than a silicon diode (but unreliable and low current).
Can I make my own diodes and transistors?
Yup, you can make your own diodes and transistors. Of course, they will be “home experimenter quality” and no match for anything you can buy. A simple CdS photodetector can be the start of an FET. Just add Scotch tape and any conductive material.
Is there such a thing as a DIY FET transistor?
Nyler Steiner was able to make a homemade FET Transistor with a CDS Photocell but still not a truly “homemade” or “diy” as the process of creating semiconductors are not done. But still interesting anyway. Mr. Steiner indicates he got the idea after reading Roger Bake notes about a DIY FET/home-made transistor.
Who invented the transistor?
Jeri Ellsworth’s setup to build simple transistors and IC’s at your home. Also, A homemade IC made by Jeri. 1 Some people believe the transistor was invented by Julius Edgar Lilienfeld in 1925, long before it was “invented” in 1947 by three American physicists at the Bell Telephone Laboratories.
How is a crude transistor made?
A crude transistor can be made by dipping a flat crystal into liquid doped semiconductor so that a thin film hardens which matches the underlying crystal, then changing the dope concentration before the next dip.