All Questions
Tagged with manufacturing manufacturing-process
22
questions
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136
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How can a designer be sure to authorize only legit ICs? How is performed? How are cloned ICs prevented to be activated?
The above diagram is from the IC Activation (locking/unlocking) slide of Fighting against theft, cloning and counterfeiting of integrated circuits by Lilian Bossuet Associate Professor, CNRS Chaire of ...
- 55
4
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45
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Populating MOLEX receptacles at industrial scale
I am a manufacturing engineer charged with implementing process improvements that reduce the total time to build an article. Our volume is such that a one minute reduction in labour results in £1K-£2K ...
2
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2
answers
148
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Lifting Pins on SMT RJ45 Connector
I'm running into an issue with a specific RJ45 SMT connector where the I'm getting at least 1 pin lifting on >50% of the boards that run through our reflow oven. The rest of the components on the ...
- 21
1
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1
answer
56
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Electronics Manufacturing Engineers: What needs to meet IPC-6012 the finished copper or the starting copper foil?
I have a PCB that has a finished copper thickness of 1 oz on all layers and must meet IPC-6012 requirements for Class 2.
Does this mean that the manufacturer can start with 0.5 oz copper foil then ...
- 111
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1
answer
93
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Long term availability of WS2812B or any Neo-pixel
I am considering the use of Neo-pixel or WS2812B components in a project that we are planning to run for the next ten years with mass-scale production. I am curious about the feasibility of sourcing ...
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2
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153
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What are the primary industrial uses of gallium and germanium in electronics?
After the "neon shortage" struck I asked What are the ways in which semiconductor-grade neon is critical for manufacturing? and the answer(s) turned out to be quite informative.
Al Jazeera's ...
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5
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3
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2k
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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,...
- 607
1
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1
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76
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Functional discrepancy within PCBA batch
When manufacturing a small prototype batch of an embedded system at EMS I have detected different behavior between the units. All units work as expected, except that some units fail to operate same ...
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1
answer
29
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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 ...
- 312
1
vote
1
answer
459
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How were "old" chips manufactured, such as the 6502?
Recently, there have been several youtube vids (example) talking about how modern CPUs are manufactured. Basically, it's a complex nightmare of dropping molten tin and lighting it with light, which ...
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22
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4
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2k
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Environmentally sustainable electronics
I am part of my company's work to become more environmentally friendly and sustainable. On a high level for the company that means pursuing ISO certifications (such as ISO 14001) and working according ...
- 607
4
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2
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1k
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Placing through hole and SMT on the same side
I have a design with huge push buttons (with 6 TH holes.)
There's a few of them so they do take up quite a bit of space mechanically from the top.
I was thinking of placing the majority of the SMT ...
- 757
0
votes
2
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598
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How to bond PCB and metal for high power RF boards
I want to bond a PCB (2 layer & 0.6mm thickness) to a metal (copper & 4mm thickness.) Could anyone help me with the process of bonding it? There is a power amplifier that has to be soldered ...
- 1
11
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3
answers
1k
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What exactly makes small quantity PCB production costly compared to large quantity PCB production?
The per-PCB cost of manufacturing a small number of PCB is 10 times or more compared to the per-PCB cost of manufacturing a large number of PCBs.
So what is it exactly that adds to the cost?
People ...
- 135
1
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47
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How to Design method to Program & Calibrate a Panel of PCBs
I'm designing a sensor-package PCB which needs to be programmed and calibrated while still in a panel of 10.
I'd like to avoid a large bed-of-nails type setup for this step so that the panel can ...
- 11
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120
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How to prevent solder getting into through hole during HASL process?
I think this is an easy enough question - I just don't know how to effectively search for the answer.
I have a PCB that came back and the programming header is plugged with solder. This most likely ...
- 12k
1
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1
answer
2k
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What components have a MSL of 5 and 6?
Moisture Sensitivity Level (MSL) relates to the packaging and handling precautions for some semiconductors.
Components with an MSL of 1 have an unlimited floor life, whereas components with an MSL of ...
- 315
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3
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2k
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Anyone know the premise of this PCB assembly note?
The assembly note states:
Bake bare PCBs in a clean and well ventilated oven prior to assembly at 125*C for 24 hours.
Why is this necessary?
- 312
3
votes
4
answers
336
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What are the manufacturing difficulties for a large Li-Ion battery pack?
How is a large Li-Ion battery pack, such as in a car, manufactured? What makes it difficult to produce, if anything?
This question is born from the high cost of Tesla Model S, which is around $70k. ...
- 1,077
5
votes
1
answer
172
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How do custom security certificates find their way onto mass manufactured products?
Amazon and Microsoft both have IoT services that manage message and state brokering. These sort of services generally require machines to have unique security certificates embedded into the firmware ...
- 239
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93
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Custom fiber optic cable simulation
I am looking to create a custom & precise static optical distribution along the length of a fiber optic cable. The idea involves manipulating an optical fiber during manufacturing to produce the ...
- 355
2
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1
answer
209
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Optimizing product tests?
I'm currently working for a company where I design and implement an automated test program to test our products. Currently our tests take quite a bit of time (several minutes per unit) and need to ...
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