Refers to solid devices built on silicon wafers or ceramic substrate. Materials used could be silicon, germanium or gallium arsenide with copper conductors and oxide based insulators. Doping is the addition of performance enhancements compounds such as gold or germanium. Includes transistors of all types and logic, analog and special purpose devices such as CCD sensors. When done devices are sealed with plastic or ceramic compounds.
Questions tagged [solid-state-devices]
133 questions
41
votes
7 answers
Why can't I light a LED with a 1.5 V battery?
The LED I am using requires a higher voltage to light than I have supplied, and as a result, it doesn't light at all.
I would expect at least a dim light, but light is not generated.
Why this behavior of "if there isn't the required voltage level…
Diego Alves
- 584
- 1
- 4
- 10
16
votes
1 answer
What do multiple emitters/collectors imply in a BJT schematics symbol?
I sometimes come across with BJT symbols from which multiple lines come out of emitter or collector. Are such BJTs different kind of devices? What does it mean in solid-state level?
hkBattousai
- 13,913
- 31
- 114
- 190
7
votes
1 answer
E-K diagram in case of semiconductors
I am currently studying solid state electronic devices and want to build my concept in this subject. Can anyone explain to me what is E-k Diagram and what is its significance?
Rahul Kumar Singh
- 331
- 2
- 5
- 8
7
votes
3 answers
Amplifiers without vacuum tubes or transistors?
Are there amplifiers that can work without vacuum tubes or transistors? Is it possible to create a working amp with high power without vacuum tubes or transistors?
SnoopyKid
- 215
- 1
- 6
7
votes
4 answers
Is a capacitor considered a solid state device?
Based on a description I read here.
Solid-state electronics are those circuits or devices built entirely from solid materials and in which the electrons, or other charge carriers, are confined entirely within the solid material.
I was thinking Caps…
Mike
- 503
- 1
- 3
- 11
7
votes
4 answers
Why datecode is SO IMPORTANT to chip manufacturers?
With the miniaturization of the devices, chip marking has shrunk, not only in size, but also in content.
And while the part number got compressed to as little as two letters (or in some cases disappeared completely?), the datecode/lot number looks…
valerio_new
- 1,622
- 2
- 14
- 26
6
votes
4 answers
What prevents MOSFET drain-to-gate leakage current?
What in the structure of a MOSFET prevents leakage current flowing from the drain to the gate of a MOSFET when the drain is at a higher potential than the gate? I am assuming that drain-to-gate leakage current doesn't exist at all because it seems…
mamawmaw
- 71
- 4
5
votes
1 answer
Semiconductors: electrons more mobile than holes despite being heavier?
I apologize if this is a very basic question. But I have always known it to be true that in Silicon, electrons have higher mobility than holes. From my semiconductor physics classes in first year, the thing I recalled was that mobility is inversely…
First User
- 289
- 1
- 5
5
votes
3 answers
Potential distribution in MOSFET
Let us assume that an NMOSFET has its source, drain and substrate grounded therefore VDS and VSB=0 V . We apply a gate voltage VGS=2 V and I want to know how this potential is distributed as we move from gate towards substrate.
Let us assume the…
user14598090
- 59
- 3
5
votes
2 answers
MOSFET Depletion Region Widening
I do understand why when drain voltage (\$V_D\$) increases, the channel carriers decrease (the channel narrows), specially near the drain island, eventually reaching pinch-off phase.
What I don't get is why the depletion region is supposed to widen,…
user246185
- 361
- 6
- 13
4
votes
2 answers
"Ideal" Solid State Switches?
I want an LED to turn off when the input voltage falls below a certain point, e.g., 3.3V. Originally, I was going to use a basic 2N2222 or 2N4401 transistor, however, because they act as "amplifiers" rather than ideal switches, they still allow…
Soviero
- 509
- 1
- 7
- 14
4
votes
1 answer
What percentage of a DRAM cell size is occupied by the transistor and/or the capacitor?
Assuming that we have a 1T1C DRAM cell manufactured at 22nm process. Based on this we can have an idea about the cell area (0.026 um^2 in this case). However, I could not find specific information about the percentage of the area consumed by the…
Arkoudinos
- 199
- 1
- 12
4
votes
2 answers
What is exactly a "stabistor"? How does it work and how is it constructed?
Today, for the first time in my life I encountered the term "stabistor". From a quick search on the Internet it seems it's a two-terminal diode-like semiconductor device used to regulate low voltages, which resembles a forward-biased rectifier diode…
LorenzoDonati4Ukraine-OnStrike
- 24,350
- 5
- 62
- 107
4
votes
2 answers
Why are quasi-Fermi levels flat across the depletion region in a pn diode under forward bias?
Why is the quasi-Fermi level flat across the depletion region in a pn diode under forward bias?
I get that EFn decreases on the p-type side and EFp decreases on the n-type side due to recombination, but why are they flat in the depletion region?…
user207787
- 425
- 1
- 3
- 12
4
votes
1 answer
Modelling and simulating multiple-collector/emitter BJTs
I occasionally like to try to understand how well-known integrated circuits work by building them up in a simulator and observing how they respond to changing conditions. However, I keep coming across multiple-collector or multiple-emitter BJTs, and…
Hearth
- 27,177
- 3
- 51
- 115