Questions tagged [multi-layer]

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Can I have 2-layer design with PCIe connector?

I was wondering whether I can have a 2-layer instead of 4-layer pcb design with PCIe golden finger and PCIe connector. Should it always be 4-layer, which I found from the PCI-SIG presentation in 2004? ...
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1answer
65 views

Does layer order matter on multi layer PCB?

I have a 4 layer PCB with the following planes... Connector (Top): Holds all traces going from connectors to components. Signal Ground: Coper filled completely. Power (Bottom): Coper filled for +15V ...
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1answer
59 views

PCB Layer Stack Dielectric Constant Math

I have a question reference PCB layer stack and the adding multiple dielectric constants together. The image and description below should help clarify the question: The differential pair will be ...
4
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1answer
63 views

How do I tell if a voltage regulator is enough to supply a larger board?

So I'm currently designing a PCB that's fairly large by my standards (10"x5"). It's a 4-layer board with internal GND and 5V layers. I'm currently using a linear regulator (LM340SX) to provide the 5 ...
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0answers
25 views

Eagle Via Pairs From/To Different Layers with Through Holes only

I am using Eagle 9.5.1 premium and I cannot figure out how to create a layer stack to use Via pairs from (say we consider a 4-layer PCB) 1-2, 1-15, 1-16 using only through holes, since my design ...
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2answers
61 views

How to connect multiple ground pins in a FFC connector

So I have a bunch of these FFC connectors shown here, and a lot of the middle pins are actually ground pins (highlighted in green). I have a multi-layer board, so I want to route all these grounds to ...
0
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1answer
59 views

Through hole via isolation in Eagle CAD 4 layers board

In Eagle CAD, in a 4 layers board (signal-ground-power-signal) how do I avoid that a through hole via from, for example, the top signal layer to the power layer is electrically connected to the layer ...
0
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1answer
191 views

Impedance matching in multi-layer circuits

In a new circuit design, I need some impedance matching for some high speed traces (i.e. Ethernet, USB, SD card...). Usually I define tracks width with this web tool https://www.eeweb.com/tools/...
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0answers
386 views

Most cost effective 6 layer stack setup?

I've been trying to come up with a 6 layer PCB layout with microvias. But I cannot think of a cost optimized layer stack, because every manufacturer seems to tell me something different on their ...
6
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4answers
760 views

Are Gerber files of inner layers interchangeable?

Regarding the Gerber files of a 4 layer PCB with 2 inner layers: Top layer: Analog signals Inner layer 1: Digital signals (SPI and I2C) Inner layer 2: Power planes (+3.3V and +12V) Bottom layer: GND ...
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2answers
653 views

Via Stitching on 2 Layer PCB when top layer is not fully ground pour

I am designing a 2 layer PCB for an LED module and need advice on EMC/EMI. I know EMI is more to do with fast rise and fall times and not frequency but I will post details anyway. The PCB will have a ...
2
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1answer
608 views

Blind Via and Even Layers

I am a new bee to PCB designing. While reading articles I have found people talking about "covering even number of layers with blind via". I have talked to a local PCB manufacturer and they said the ...
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2answers
1k views

Power connection vias on 4 layer PCB

I am new to PCB design. I am creating a 4 layer PCB with the following layer stack: Signal (1) - GND (2) - Vcc (3) - Signal (4) Now, I'll need Vcc and GND on both the signal planes. This means I'...
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0answers
796 views

Altium overlapping room on top and bottom layer

I am trying to do a 4 layer PCB (The 2nd layer is Ground and 3rd layer is VCC). While I am placing overlapping rooms on top and bottom layers, then after placing the rooms, when I try to move a room ...
4
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2answers
921 views

What are the rules to make different drill pairs for VIAs in PCB layers?

Considering a 6-Layer PCB with the layer sequence as below: 1-Signal 2-GND_Plane 3-Signal 4-Signal 5-VCC_Plane 6-Signal -What are the considerations that I should take care of when making drill ...
1
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1answer
505 views

Line impedance in 4 layer PCB

i have a question.. I have a 4 layer PCB where top layer is a track layer, 1st middle layer is a GND plane, 2rd middle layer is a Vcc plane and bottom layer is a trace layer. The layer stak table ...
2
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2answers
3k views

PCB design, Ground plane and power plane issues

This is the first time I am designing a 4 layer PCB. The circuit will work on multiple frequencies: Signal acquisition part works on few Hz to 200 Hz(max), but one portion of the circuit will generate ...
1
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1answer
6k views

How to connect a net to a power plane in Altium?

How do I connect a net to a power plane in Altium? I'm using Altium 15 for 4 Layer PCB project. I've created a rule assigning a net to a power plane but it doesn't work as the pads that should be ...
2
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0answers
369 views

Multi-layer board drill pair recommendations to reduce PCB cost

I'm designing a simple 6 layer board with following as core components. http://www.ti.com/lit/ds/symlink/tm4c123gh6pm.pdf http://www.ti.com/lit/ds/symlink/afe4403.pdf I using this stackup Now I'm ...
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2answers
1k views

Eagle: Autoroute only gnd and vcc net with using only vias

I'm struggling to get the Eagle Autorouter (Eagle 7.6) to route only the VCC (layer 2) and GND (layer 15) layer on a 4 layer board. I have created a net class for VCC and GND. Now I would like to have ...
5
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1answer
599 views

Avoiding noise coupling by power switching to ground plane in multilayer PCB

I've a 4 layer PCB in which I've to layout a power switching supply mixed with digital signal circuit. My stack up is: Top Layer: component and routing (power net and signals) Internal plane 1: GND ...
8
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2answers
7k views

High Voltage Multilayer PCB

I want to design a four layer PCB, where on the top and second layer are voltage up to 600V present. While I find many information about trace spacing, I don't find anything about isolation between ...
6
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2answers
1k views

How to remove copper from inner planes on cut PCB

I'm in the middle of designing a specialized communications device that uses an off-the-shelf radio module. This radio module is larger than desired and the PCB area that is not needed is easily cut ...