Questions tagged [multi-layer]

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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 ...
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2 answers
197 views

4 layer PCB isolation

I'm working on a design that switches 230vAC using mosfets in a back to back configuration (load is approx 2A) The isolated mosfet driver is Si8751. The top and bottom layers of the PCB will be ...
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2 answers
161 views

How to select all components on Top layer in Altium PCB?

How can I select all components on Top layer of a multi-layer PCB in Altium without selecting the route traces? And is there any way to select all components on both Top and Bottom layers together?
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1 vote
1 answer
764 views

What spacing to use between microstrip trace and ground plane on same layer?

I am designing a 4 layer board (1 - signal, 2 - GND, 3 - power, 4 - signal) and I have some microstrip lines on top and bottom layers. Should I fill the top and bottom layer with ground? What do you ...
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1 answer
367 views

Need some tips on using hot air soldering station for my project

I and my friend have designed a 0.8mm 4 layer PCB for our project. The top and bottom layers are for signal traces and the middle layers for power and ground. All the components that we use are SMD ...
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13 votes
7 answers
2k views

Debugging a multilayer PCB?

This is not about debugging the actual hardware/software on the board... I had my first 6-layer PCB made recently, it's a 50mmx50mm board with the following stackup: Signal Ground Signal Signal ...
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1 answer
238 views

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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1 answer
182 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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4 votes
1 answer
66 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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2 votes
2 answers
201 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 ...
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1 answer
229 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 ...
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  • 303
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1 answer
286 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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6 votes
4 answers
925 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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  • 185
1 vote
2 answers
1k 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 ...
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2 votes
1 answer
824 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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5 votes
2 answers
2k 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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1 vote
0 answers
1k 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 ...
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4 votes
2 answers
1k 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 ...
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1 vote
1 answer
637 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 ...
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4 votes
2 answers
4k 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 ...
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  • 69
1 vote
1 answer
9k 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 ...
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2 votes
0 answers
526 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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  • 369
0 votes
2 answers
2k 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 ...
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5 votes
1 answer
823 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 ...
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10 votes
2 answers
11k 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 ...
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  • 101
6 votes
2 answers
2k 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 ...
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