Questions tagged [microfabrication]
19 questions
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Is there any specific application for an indirect band gap semiconductor?
I know that direct band gap semiconductors are very attractive for optical emission, and even though indirect band gap are used as well, I keep wondering: is there any technology that specifically makes use of an indirect bandgap semiconductor? In…
Bidon
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Ordering Integrated circuit fabrication
Is there IC fabrication services?
You upload the IC design you want and pay.
They send you physical IC of what you ordered.
Something like 3D printing service, such as shapeways.com for example, but for Integrated circuit.
Do such service exist? Why…
Mustafa
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3
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2 answers
How are integrated circuit photomasks fabricated with such high resolution?
I understand that photomasks / photoreticles are used for the fabrication of integrated circuits, CPUs, and such. I also have read that CAD software and languages like VHDL are used to describe the actual physical layout of the gates and their…
nbura
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2
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1 answer
What is the "dangling transistor" in this operational amplifier equivalent schematic?
I was comparing the datasheets for the three related CMOS Op Amps from TI: TLC2252, TLC2262, and TLC2272. TLC2252 is the micropower version; TLC2272 is the high-performance version; TLC2262 is offered as a compromise between them.
The equivalent…
Theodore
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What's the use of bonding pad assignments?
This is not the first time that I've seen a bonding pad diagram like this on chip data sheets:-
But this is inside the chip, so why do we care? And is it of interest that the chip die is 15 mils thick?
For the interested, this is from a TI "RAIL…
Paul Uszak
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2
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4 answers
How was physical design verification accomplished before CAD?
I'm reading a history of EDA for ASICs because I'm curious about how older ICs were mass-produced.
The article explicitly mentions that in the early 1970's, SPICE was used to simulate circuit behavior, and cut rubylith was laid out to ensure that…
cr1901
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How can I deposit metallic electrodes on a temperature-sensitive wafer?
How can I deposit metallic contacts on a wafer in a process that won't heat the wafer above 80C? The size of the electrodes should be around 1mm2.
The wafer could be glass or silicon, coated with a sensitive organic/polymeric film, functioning as a…
Sparkler
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Difference between arsenic and phosphorus in IC fabrication technology
What is the difference between arsenic and phosphorus in IC fabrication technology? When do we prefer one of them over the other?
mohammad rezza
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1
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Is a cylindrical GAAfet fabricated with lithography and etching?
The GAAfet, aka the surrounding gate transistor (SGT), is basically a FinFET that surrounds the channel on all 4 sides instead of 3. However, a lot of examples show a cylinder instead of a rectangle.
(source website)
I've been searching for info…
DrZ214
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Shared IC tape out
I have a IC design about 300*300 micrometers. Due to the high cost of IC tape out, is it possible to fabricate the IC jointly with other people?
Does the company have such a service?
seyyedali hosseini
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vote
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Decreasing phase noise of natural oscillators by passive resonant filter on-chip in the MHz regime
I was doing a literature research on microwave filters and to me it looks like passive SAW filters/resonators have the highest quality factor below 1.5 GHz, but with a high power loss. Coupled planar coils/stripline (U-shaped) do not really reduce…
user48953094
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0
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1 answer
Why do we use LDD technique in IC fabrication technology?
Why do we use LDD(lightly doped drain) in IC fabrication technology?
In the "silicon VLSI technology" book, was mentioned that this is in order to create a voltage drop in drain region. So don't you think this force the supply voltage greater?
mohammad rezza
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Dry or wet etching in fabrication cmos chip?
What types of etching are used in conventional chip fabrication technologies such as TSMC 0.18, dry or wet?
seyyedali hosseini
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0
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What is the pad-etching process in standard CMOS fabrication process
What is the pad etching process?
Is it possible to etch to the bottom metal layers or vias in standard CMOS fabrication?
seyyedali hosseini
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0
votes
1 answer
Does melting microwires cause internal shorts
If you overheat a chip, you can melt the microwires attaching the wafer to the package. When this happens, can the melted microwires cause shorts between the pins of the chip, inside the package of the chip? The result of this would be short…
Tom
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