Questions tagged [manufacturing-process]
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Why are the challenges in using SRAM over DRAM for main memory?
Historically, when compared to DRAM (dynamic ram), SRAM (static ram) is more expensive with a lower density, but it's much faster and more efficient. As a result, SRAM is reserved for devices, such as ...
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Why does Backside Power Distribution work for high speed CPUs?
Several upcoming or future CMOS process nodes are said to offer some kind of backside power delivery for Silicon CMOS transistors, so the precious area in the lower metal layers is freed up for signal ...
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Purpose of field implant in semiconductor manufacturing
I recently joined the semiconductor manufacturing industry.
In one of the process flows, I see a stage that has extra boron implantation step (called the field implant) in the P-WELL region.
I've ...
CommunityBot
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Question on "Parts should be used within 5 days after opening." statement on component shipping package
I've been given the task of verifying a batch of ICs from a chinese broker, to see that the chips the company has bought are what the broker claims they are. The package we've received looks like this,...
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How do components not get knocked off or fall off during reflow?
I am looking at reflow ovens. A lot of them have a metal conveyor belt the boards sit on. On a double sided board, when you put the board on the metal belt, won't the metal belt knock components off ...
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Failure Rate calculation based on manufacturing defects (capacitor)
Electronics failure rates typically follow the exponential distribution and models like Prism, Mil-Hdbk-217 or 217Plus (newer) are used to predict failure rates.
We are currently in the production ...
CommunityBot
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Can you (theoretically) reverse bias a BJT?
My understanding of how a BJT(bipolar transistor) works looks like this:
From https://www.allaboutcircuits.com/textbook/semiconductors/chpt-2/bipolar-junction-transistors/
Picture link: https://www....
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Are there any resources on Column Last Attach Process? [closed]
I am trying to find resources about this process, but the only thing I have been able to find is the full form of the acronym CLAP any help is appreciated.
This process is used vehemently in the ...
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Why are resistors tolerances relative instead of absolute?
Every resistor has a tolerance, this provides the user with an idea of the accuracy of the product. This tolerance is represented by a percentage. This means: a big value resistor will be less ...
Null♦
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What's going wrong with my solder paste / mask?
A short question this - I've got a board with a QFN-32 0.4mm pitch footprint, I ordered this stencil, and a tube of this solder paste, and the result is in the picture below.
Now, I'm new to this, but ...
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What does it mean when it is said that an Intel CPU is assembled in Country X?
I was reading a same question posted on Quora but wanted to ask the same question here on this forum. So if the CPU states that it is assembled in some country X what does that mean exactly ? What ...
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Can through-hole leads be cut level with the PCB back while maintaining good connectivity?
If I'm using confusing terminology I apologize, this is relatively new to me and my first post on stack exchange.
My question is: Can through-hole leads be cut and filed level with the PCB back while ...
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Why do some exposed pads have small tabs, and does my PCB footprint need them?
I've noticed a few component packages now that have small "tabs" on the sides of their exposed pad (thermal pad). One example is the Analog Devices ADM7154 LDO:
Note the 0.356 x 0.457 mm ...
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PCB design rules
To design my board, how may I ask a PCB manufacturer for the constants rules or clearance rules? What is the particular terminology that I would use at the time of asking about the design standards ...
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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.
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