Questions tagged [die]
A die is a small block of semiconducting material on which a given functional integrated circuit is fabricated. Typically, integrated circuits are produced in large batches on a single wafer of electronic-grade silicon (EGS) or other semiconductor (such as GaAs) through processes such as photolithography. The wafer is cut (“diced”) into many pieces, each containing one copy of the circuit. Each of these pieces is called a die.
32
questions
0
votes
1
answer
95
views
Are these old graphic controllers all the same die packaged by different manufacturers? [closed]
I am looking at old ISA graphic adapters that would provide a simple black and white text mode. I am trying to make the design as simple as possible and I would like to make the PCB as small as ...
- 513
25
votes
4
answers
4k
views
Why do fabs bother to print circuitry right up to the edges of a wafer when they know that the partial dies will be discarded later?
Around the edge of a wafer (see image below) you will observe that there are many partial dies. It seems wasteful to use the lithography machine to print these partial dies because they will be ...
- 432
1
vote
2
answers
68
views
How does MOSIS let designers “share” a mask set?
In Weste and Harris's CMOS VLSI Design, they describe MOSIS as follows:
The MOSIS service [Piña02] is a low-cost prototyping service that collects designs from academic, commercial, and government ...
- 1,161
8
votes
3
answers
2k
views
What shapes can IC dies be?
I know an IC die can be cut into a rectangular shape. Apparently triangles and rhombuses are also possible, but not used. What other tesselations can they be cut into?
- 291
5
votes
2
answers
693
views
Inside a 2N3904 transistor TO-92 package
I cracked open this 2N3904 transistor. I lack the means to test its function until tomorrow.
The die doesn't look like anything I've ever seen before. I'm not quite sure where the silicon is.
In your ...
- 353
5
votes
2
answers
826
views
What could've killed my ESP32S MCU?
I'm making my project and I managed to kill 2 ESP32 boards. First time I thought it was just accident (me shorting 2 wires) because my cables were messy, but it happened again and the circumstances ...
- 167
0
votes
2
answers
86
views
Does the electrical parameters of a packaged transistor change from bare die transistors?
When comparing the electrical parameters of the MOSFET/Transistors, do they change when the package type changes? Are the parasitic parameters of the packaged MOSFET and bare die MOSFET change.
It is ...
10
votes
5
answers
2k
views
ADC stops functioning when cold
EDIT: VERY INTERESTING TEST RESULTS
I just tried inducing the thermal failure using an inverted "can of air" (likely difluoroethane). It even when its super cold, (might even be below -40C), ...
- 449
0
votes
1
answer
158
views
CPU die: does it have in-die wires on single side of both?
Internet search finds single vs double sided memory, here discussions are about Printed Circuit Boards (PCBs) for singe vs double sided. I'm interested to know if e.g. Intel processors, as they are ...
- 247
3
votes
1
answer
181
views
Silicon die on Peltier device with COB wirebonding
I have a camera sensor (bare die) that must go on a very tiny PCB that also contains electronics for data serialization that dissipate enough power to make the PCB pretty hot (40-60 deg. C). I want to ...
- 91
0
votes
1
answer
132
views
Modelling ESR of a parallel plate capacitor
I am trying to model a parallel plate capacitor (on die capacitor generated using metal plates.)
I know the capacitance per unit area, and metal sheet resistance. No knowledge of the dielectric.
I ...
0
votes
0
answers
113
views
Is there a common ballpark estimate for the percentage of an IC package that is taken up by the die?
Not a very technical question but I'm interested in finding out the average size of a 3-axis accelerometer die. I’m finding that the smaller package sizes are around 2x2x1mm, is there a way of ...
- 600
0
votes
2
answers
184
views
Help identifying a decapped IC chip [closed]
I have a 24 pin IC chip that was soldered onto a tiny PCB. I was able to decap the chip and read the label, but I am not finding any information through Google.
Does anyone recognize this label that ...
user271623
2
votes
1
answer
1k
views
When should bare die be used instead of QFN/BGA packages?
I have no experience with bare die as a package, and I have been recently tasked with deciding between bare die, BGA, or QFN package for a SoC.
Searching the internet, I have not really found much ...
0
votes
1
answer
76
views
What electrode material can I use for electrical discharge machining? [closed]
Can I use an electrode made of melted soldering wire in electrical discharge machining (EDM) instead of copper or graphite? I think it is very easy for me to make electrode by using melted soldering ...
- 11