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Questions tagged [fabrication]

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0answers
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Design/Simulation and on-chip microfabrication of a 2D/thin-film bias tee with narrow bandwidth around 200 MHz

What is necessary and a possible design to realize a bias tee for on-chip integration and the AC electrical connection of two 200 MHz nano-rf-oscillators (both DC-fed with 1-10 mA) and creating an AC ...
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2answers
76 views

Are bacteria on integrated circuits problematic?

Considering the scale of IC's using sub 50nm technology, I would think that even thought fabs are incredibly clean, there would still be a substantial amount of bacteria. Do they prove problematic in ...
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1answer
87 views

How can a MOSFET can be used as resistor and capacitor [closed]

How can a MOSFET be used as a resistor or capacitor? Please explain this line: "The DS channel of MOSFET can serve as a resistor."
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2answers
108 views

CMOS NAND Image

I was looking at this image which shows a CMOS NAND standard cell. However, how can I see this depicts a NAND? A CMOS NAND has parallel PMOS and serial NMOS transistors but somehow I can't see this ...
17
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7answers
4k views

My PCB manufacturer only requires eagle board file, and not a gerber file is it fine to go about getting the board fabricated with him? [closed]

It's my first time getting a PCB manufactured. My manufacturer only requires eagle board file, but not a Gerber file. Is it fine to go about getting the board fabricated with them? Or should I be ...
0
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0answers
236 views

what is parallel run length in DRC check

What exactly is parallel run length in DRC check. I understand that there should be a minimum spacing between two metals depeding upon their parallel run length. In the above figure R1 is the ...
2
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1answer
150 views

How is silicon for ICs produced? [closed]

You hear in grade school that the input to silicon foundries is sand and ICs come out the other side, but you never much more about the refining process or what is actually involved in extracting ...
4
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1answer
268 views

What is the purpose of the gate runner on a semiconductor die?

With reference to the image of a FET die below, the gate pad is used to make connections from the die out to the device package. But what is the purpose of the gate runner? Why does the gate ...
1
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1answer
103 views

Process technology: LP and LPH

My question is related to the following news regarding IC process technology: Samsung has introduced 28-nm LP HKMG and a new variant, 28-nm LPH HKMG process technology. Following abbreviations are ...
2
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3answers
612 views

Ordering Integrated circuit fabrication [closed]

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 ...
7
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3answers
345 views

Are silicon microbolometers inherently more expensive than conventional CMOS light sensors?

We're finally starting to see practical thermal imaging sensors (microbolometers) entering the consumer market. However, they are still vastly more expensive than comparable visible imaging sensors. ...
1
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1answer
154 views

Silicon purity and electronic feature density [closed]

During development of an integrated circuit it is my understanding that you require a silicon purity of 99.99999999%. Has this always been the case? In 1971, had the first commercially available ...
10
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4answers
7k views

Why MOSFET source is indicated with arrow ?

I know that , a basic MOSFET contains source and drain , and either it's a NMOS or PMOS ; it is indicated by an arrow at source . But let's look at a fabricated NMOS. Here we can easily see that ...
0
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1answer
36 views

Can the machine readable files for integrated circuits be verified by the manufacturer design team?

My question is simple if you take the chip design files (blue print files for the fabrication process) which are used by the fabrication process that the design engineer(s) have completed the files ...
1
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2answers
226 views

Chip Design Computer Generated Files for Fabrication Process

Could someone provide an overview of how the chip design files are used by the fabrication process? What I mean is once the design engineer(s) have completed the computer generated design blue print ...
6
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2answers
2k views

How electronic components like diodes, capacitors, resistors are added to CPU?

I have been trying to understand how CPUs are manufactured with those large and complex circuits. But Making of CPU only talks about projecting transistor diagrams(May be that is the major part). Bu ...
22
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7answers
8k views

Is transistor the only electronic component on a CPU?

I have been reading about CPUs recently and came to know that all logical blocks and memory on CPU can be made out of transistors. So is it the only electronic component on CPU? Edit(Made after first ...
7
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4answers
4k views

Why more, smaller transistors increase power efficiency?

Transistors, bjt, MOSFETs OK got it. More transistors = better computing got it. But compressing the transistors closer to each in my mind only helps reduce the physical dimensions. So does a CPU or ...
-1
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1answer
89 views

At any given semiconductor node, how many fabs in the world? [closed]

Let's pick a node, say 45nm. How many wafer fabs are there worldwide that can produce chips with that resolution? Tens? Hundreds? And does this mean that producing equipment for them is almost a ...
0
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1answer
812 views

Inter die vs Intra die process variation

Due to fabrication process, there will be variations, among wafers as well as among dies across a wafer. My question is that what variations are significant between dies? And what variations are ...
1
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1answer
138 views

Pick and Place File with panelized PCB

I've designed my first PCB that will be machine populated. I sent my design to a fab who is going to panelize and make the bare boards. I'm using a separate company to populate the boards. Would it ...
0
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1answer
356 views

CMOS Fabrication Process - Ion Implantation

During the process of producing the source and drain of the MOSFET, people use a technique called ion implantation. So my question is why use ion not atom? Thanks very much!
1
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1answer
337 views

BOM/OPL parts help before PCB fab

I am completing my first official PCB project. I am outsourcing the PCB fab to Seeeed Studio. I was wondering if any of you might be able to shed some light on my issue. I am using their PCB ...
37
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7answers
3k views

How do I make sure my electronics design is good from manufacturing perspective? [closed]

I am a beginner in electronics design. I have some experience with fairly complex PCB design. I want to design a product that will hopefully sell a lot. How do I ensure that the design is inexpensive ...
2
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2answers
101 views

How differential pairs should be called out on fabrication print?

I have a design that the diff-pairs (100 Ohm impedance) and single-ended (50 Ohm impedance) are routed on the same layer. To specifying the impedance, on the “Lamination Stack-up”, I am going to add ...
6
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1answer
2k views

What is the physical size of a logic gate?

I always hear about process size improvements in the news, but could never figure out how it translates into dimensions of a logic gate. I found a chapter from Weste's CMOS VLSI Design, that contains ...
0
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1answer
2k views

Suggestions for in-house PCB/FPC lab? [closed]

We are a hardware startup based out of Greece, looking for in-house PCB/FPC fabing solutions/equipment. LPKF's ProtoLaser U3/S look great but they cost $140K and $70K (if I'm not mistaken) ...
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2answers
325 views

ASIC fabrication companies [closed]

What is the cheapest way to synthesize ASICs in small quantities? (5-10 chips). I'm asking for a specific company, not method.
4
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3answers
3k views

Why are MOSFETs used for VLSI IC fabrication instead of JFETs?

Why are MOSFETs used for VLSI IC fabrication instead of JFETs? What are some reasons the use of JFETs is not common?