Questions tagged [multi-layer]
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40 questions
2 votes
1 answer
248 views
Where does the return signal flow for multilayer PCB?
I'm currently taking an informative video course named "PCB Signal Integrity" by Douglas Brooks. I've attached a screenshot below where the instructor mentions that he does not know where ...
- 57
0 votes
0 answers
24 views
Best Practices for Power and Ground Connections for decoupling caps in a Four-Layer PCB Layout [duplicate]
Consider a four-layer PCB with the following stack-up: Signal / GND / PWR / Signal. Suppose there are three components placed close to each other on the top layer, and some of their pins are connected ...
- 447
0 votes
1 answer
161 views
Layer stack up selection for better signal integrity
I need to find an optimized stack up from the signal integrity point of view. I want provide for all of my signal tracks an adjacent GND plane. I have the following candidates for my stack up, would ...
- 1,438
0 votes
0 answers
84 views
GND in multi-layer PCB
Imagine a simple 4 layer PCB with this stack layout: SIGNAL SIG-GND PWR-GND POWER Layer two and three must be connected together at the end, so the two GND planes purpose is "just" for ...
- 194
2 votes
4 answers
3k views
Multilayer PCB with multiple different voltages
Currently I am creating a 6-layer PCB. I have multiple voltages as 3.3V, 5V, 12-14V and 48V. Now I am sitting on the stack up to get started with the tracing. Should I put multiple power planes for ...
- 121
1 vote
1 answer
921 views
Using vias with power and ground planes in altium designer 20.2.4 cross error
I'm making a pcb with a 4 layer stackup. The top layer and the bottom layer are used for signal and component routing. The 2 layer is GND (analog and digital planes) and the 3rd layer is Power (analog ...
2 votes
1 answer
183 views
Temperature rise for multiple layers of PCB
I'd like to better understand what to expect when carrying current on multiple layers of a PCB. I've used trace width calculators to determine how wide a trace needs to be to carry a given amount of ...
- 13
11 votes
1 answer
1k views
How are layers kept parallel in multi-layer PCBs?
If I understand correctly the process to assemble multi-layer PCBs, two-sided boards are made, with separators intertwined, and they are then pressed together. The two-sided boards have already been ...
- 799
1 vote
1 answer
84 views
PCB Newbie Stackup understand questions
I want to design a board with 6 layers up to 1.8mm thickness,120ohm diff and 90ohm diff ,SE 50 ohm and the manufacturer sent me this stackup: 12 mil for SE-50ohm not too thick? what is the material ...
- 551
1 vote
2 answers
234 views
What package is the best choice for MAX485 bypass capacitors?
What capacitor package is the best choice for bypassing the MAX485? C1: between LCSC part #C342629 and #C89632? C2: between LCSC part #C967612 and #C30926? Note: this question is a following question ...
- 97
0 votes
1 answer
149 views
Heat management in multilayer board
I need some help designing proper thermal management for my board. It's a mixed analog-digital circuit, the analog part is noise sensitive. I have +/- analog supply, and a + digital supply. Several of ...
- 11
3 votes
3 answers
594 views
Multi-layer PCB design
Why in the diagram below is called 4-layer board? Link: https://www.youtube.com/watch?v=ESnDQl7ZM5o From my understanding: A multi-layer PCB board: Top connectors and signal traces Power Ground ...
- 123
0 votes
0 answers
192 views
4-layer PCB with VCC and GND inner planes with high current
I have a 4-layer PCB with GND and power planes and on the top and bottom layers I have 220 VAC with 10 A currents. I have many questions about every part of this board but the most important ones are: ...
1 vote
1 answer
213 views
What to do with a blank layer in a multilayer PCB
Currently I'm working on a PCB that doesn't really need to be 6 layers, but I had to manufacture this project with my other 6 layers. Here is a problem, I have a blank layer; no signal or anything on ...
- 97
0 votes
1 answer
1k views
Can I replace a single layer ceramic capacitor with a multilayer one?
I have this circuit that you consisted of an RC filter for a two-wire endstop, the circuit works fine but apparently they no longer manufacture single-layer 100nF capacitors, they are only found in ...
- 457