Questions tagged [pad]

For questions about PCB pads, which are exposed regions of metal that component leads are soldered to. Use in conjunction with "pcb" and/or related "pcb-" tags (e.g. "pcb-fabrication"), as applicable.

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SMD pad size for custom component

I'm trying to reflow a custom shaped strip onto a PCB, but I'm unsure about what size pad I need on the PCB. The strip is 13mm x 6mm x 0.3mm. The PCB surface finish is ENIG. The pad is likely to be ...
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5 votes
4 answers
1k views

Through holes vs pads for hand soldering

I am currently designing my first PCB to be manufactured by a fab (I am using JLCPCB). The base material that JLCPCB offers is FR-4 TG130. In that design, I have a few wires that would need to be hand-...
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1 vote
1 answer
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SMA connector pad size

I am designimg a board with an SMA connector for 8 GHz. The trace is calculated as a coplanar waveguide. For the given stackup, it is 0.25 mm wide. The SMA connector pin is also 0.25 mm wide. If I ...
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1 vote
0 answers
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PCB 0402/TQFN pad design

I am currently designing a product which uses 0402 passives and other fine-pitch parts. As the PCB-space required is a major design goal I want to reduce the footprints. High production yield is also ...
1 vote
1 answer
365 views

KiCad: Ground plane won't connect to pads

I am currently running into a problem in KiCad where the ground plane won't connect to some pads. KiCad even tells me to connect them but doesn't seem to make the connection automatically.
3 votes
1 answer
73 views

Why is this recommended in PCB layout: 2 leads between pads

Why is the connection recommended as in the top picture?
0 votes
2 answers
252 views

How to go about repairing a ripped solder pad on a USB flash drive?

I have a flash drive that sustained damage to the USB port. It looked like it just needed to be reseated with fresh solder and some TLC so I went ahead and started to remove the damaged port, then one ...
0 votes
2 answers
65 views

Reading the pad dimensions from the data sheet

I would like to know in what units are these dimensions?
1 vote
1 answer
48 views

Altium surface pad next to throughhole pad design

I'm trying to make a simple board that will use an Arduino Nano 33. These boards allow for being either used as an SMT board or with a standard throughhole header. I'd like to make the board where I ...
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0 answers
35 views

elongated footprint pads for LGA, BGA, QFN packages

Sometimes I need to add more solder in between a capsule and its land patterns, other times I even need to remove some. It would be much easier if the footprint pads were protruding out from ...
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1 vote
2 answers
403 views

6 dB in-line 50 ohm attenuator

Recently someone posted a question regarding an inline device to attenuate their voltage on a 50 \$\Omega\$ coax by half (i.e. 6 dB). Because the question asked for commercial recommendations, it was ...
1 vote
1 answer
72 views

Solder pad with no copper circles inside?

I'm trying to use a ROHM BD9F800MUX (buck PMIC regulator with synchronous regulation.) Upon looking at their footprint guide, it has something I have not seen before and is poorly documented. It ...
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2 answers
150 views

Stereo Headphone Cabling (TRS) - Why 4 pads on L loudspeaker and 4 cables?

The R(ight) loudspeaker on my AKG-K99 headphones stopped working. I bought a replacement (x2) 'mini' loudspeaker. After soldered the replacement the sound was "weird". No problem. I ...
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1 answer
108 views

Electric Heating Pad Voltage Issue with STC1000

I have bought an electric heating pad from here. It works fine if I connect both legs to a power supply directly. However, I would need to connect it to a temperature controller (STC1000) for my own ...
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2 answers
400 views

Replace a DC jack I messed up. Can I bypass the DC jack or run from the batteries? [Sampler SP-202]

I need help to fix/replace a DC jack. I messed it up and the board I need to fix used batteries as well but now they wont work because I butchered the DC pads. Is there a way to bypass the DC jack and ...
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2 answers
292 views

Pad holes are filled in Eagle

In Eagle (v9.6.2), the routes fill the holes of my pads. hence when I want to print it, the pads are all black, no drill holes. What am I missing? I know this is similar to Eagle Ground Pour Fills ...
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72 views

How to create a copper pad for heat dissipation in Eagle?

The data sheet for this component, the RPX-1.0, says SW Switch node. Connect 6, 7, and 8 to large copper pad for optimal heat dissipation. Is a "large copper pad" an extra component that ...
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10 votes
3 answers
873 views

Pads in IC's corners

One can sometimes observe rectangle pads in the corners of some IC's footprints: What are they for?
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2 answers
192 views

Fixing a missing solder pad [closed]

Shown below is the PCB of a panel controlling an electric scooter. I accidentally managed to pull out all the wires so they looked as in picture 1. I wrote to the company who advised me to solder it ...
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1 answer
33 views

Pad Spacing violates trace spacing

How does one deal with a situation where a trace has particular clearance spec to other nets, but that clearance spec is not respected by the pads on a component that the net attaches to? A simple ...
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2 votes
1 answer
100 views

SMT Multi-Footprint Size to IPC standards for production

I am currently designing a board that will need end up getting CE tested, and I am currently testing the effects of different sized decoupling capacitors but I am constrained on space. I want to make ...
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0 answers
67 views

Repair pads on PCB

I've accidentally used too much force on the board while trying to remove a flex connector and so I've removed a lot of PCB pads as well (see image). I have a new flex connector, but I do not have ...
0 votes
1 answer
36 views

What is a way to figure the pads from a datasheet where the part diagram leaves out dimensions?

I am trying to draw a footprint in Eagle (datasheet PDF). This isn't the first time I had to draw a part without enough dimensions, but I'm wondering if there is an easier or more precise method. ...
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1 vote
2 answers
305 views

Noob soldering help: test pad repair

So I haven't soldered in years and only have experience with through hole soldering and large components. Today I attempted a repair with a HTC Vive controller. I know where to solder and managed to ...
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How could I give pad to this antenna section?

I have a SC20 schematic diagram. From the diagram, there is an antenna section as shown. How can I give a pad to this antenna for drawing PCB in EasyEDA? The schematic provided some information like 1....
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2 votes
3 answers
337 views

How do I jump from trace here?

I've been asked to reattach the positive cable that got ripped with the pad from a board given that I own a soldering iron. It seems simple enough to just jump it from a trace. Scraped a bit of the ...
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1 vote
1 answer
88 views

Linear regulator with tab at ground

I am searching for a linear regulator with tab connected to GND instead of Vout because it would be easier for thermal management. Unfortunately, all linear regulators seem to have their tab connected ...
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0 votes
0 answers
768 views

How to repair a solder pad that came off a ribbon cable?

I've similar questions on how to repair solder pads however all the questions so far only talk about solid PCBs. For some reason the solder pad came off this ribbon cable after I had soldered it ...
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1 vote
4 answers
762 views

KiCad how to export oval PCB hole as a drill file?

Using KiCad, is there a way to have a pad with an slot shape (referred to in KiCad as "oval") be exported properly as a drill (.drl) file? The pad in KiCad looks like Fig. 1 below. But after ...
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1 vote
1 answer
220 views

Damaged PCB - solder pad missing

have been trying to replace a capicitor on this inherited pcb. Sadly the negative pad for C6 (Orange circle) seems to be missing. Can anyone advise how best to get a capitor seated here? Thanks. PS ...
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0 answers
68 views

KiCAD Track Connection Fault

I am designing a board on KiCAD and I am facing an unfamiliar issue. Most of the pad connection is done successfully but a few pads can't be connected. While I am starting a new track between pads, ...
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0 votes
2 answers
177 views

PCB Pad sizes: Is it worth going over Level A of IPC-2221?

All is in the title. I've been using this "guide" to calculate PTH pad diameters. I'd like to comply at least with Level A of IPC-2221. Apparently it just means that the pad has to be 0.7 mm (275 ...
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1 vote
0 answers
2k views

Best way to remove paste in pad footprint in Altium

I have a top only pad in a footprint. I don't need any open window on the the top solder layer so I set the tented option enable for my pad... But even if the top solder is off (no window for this ...
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0 votes
1 answer
289 views

Pads very close together, no space for guard ring? What should I do?

Introduction to the problem I use an op amp to buffer the output of an in amp and to drive the input of an ADC, so the signal path looks basically like this: in amp -> op amp -> ADC The device ...
6 votes
3 answers
3k views

Can breakout board still be used if the pad gets ripped out?

In a desoldering incident, my beautiful board ended up like this: Other side: The guy doing the desoldering says there is no chance this board is usable since he claims he ripped through the ...
0 votes
1 answer
470 views

Remove/exclude exposed pad of QFN package from PCB layout

I am doing a PCB layout with a Atmel/Microchip MCU ATSAML21E18B-MUT‎ which has QFN-32 package 5x5 mm. This board can have a maximum of 20x40 mm and I am having problems with space because the circuit ...
1 vote
2 answers
171 views

Allowing redundant tracks in EagleCAD

I have a 2-layer PCB, where I'd like to connect the top and bottom layers of two pads with a trace. However, when I try to connect one layer, the other layer simply disappears, as shown below, where I'...
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1 vote
1 answer
55 views

xmega-E5: exposed pad

I'm drawing my own CAD library for the ATXMEGA*-E5 devices. At page 69 (Seztion 35.2 32Z) there is the drawing of the package 32Z (5x5mm 32-lead VQFN). I cannot find any information about the ...
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0 votes
1 answer
80 views

Re adding broken pads

I'm doing 2 repairs and currently the pads are missing. I have jumper wire and I try to solder it on with flux but the tinned copper wire doesn't stick too the surface. I've been trying for 4 days now ...
0 votes
1 answer
422 views

Are pads from the EAGLE "testpad"-library printed?

Are pads from the EAGLE "testpad"-library printed or separately bought and mounted? E.g. "testpad / PTR1" TEST PIN Footprint: B1,27 (Version 1) TEST PAD 3D Package: B1,27 (Version ...
3 votes
1 answer
128 views

Transistor pad layout for efficient use of prober

As we are a materials company the expertise is not in EE, so I am asking a very simple question. I tried to search online for this, but could not find an answer. We are making transistors with our ...
0 votes
1 answer
170 views

How to make an electrical connection to thin gold plating?

Hello fellow engineers. I am trying to make an electrical connection with some gold plating. The gold plating is shaped like a rectangle, with dimensions of 3mm x 1.5mm x 0.1μm thick. Here is what ...
0 votes
2 answers
57 views

connect pad inside component symbol

I'm trying to connect A4 to pin 5 in 6050 in the picture. When I click those with the net tool, it also connects A2, which is not what I need. If I use the delete tool and erase the junction, they ...
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3 votes
0 answers
231 views

7030 SMD LED pad configuration

I have not done a lot of work with SMD LEDs and have a question about the pad layout. I have done quite a bit of research and haven't found much helpful info yet. I am working with 7030 SMD LEDs ...
11 votes
3 answers
15k views

KiCad: Some pads to solder wires on

I am working on a PCB for which I need external soldered wires. I made the whole PCB with al the traces on the front layer. Then, with 3 vias, I got to the back layer. Here I need to solder 3 wires to ...
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4 votes
2 answers
434 views

Question relative to pads for capacitors - high frequency

In the article Compact sub nano second pulse generator using avalanche transistors, I read P. 874 Further, we used pads on a doublesided 0.062” FR-4 epoxy glass laminate pc-board for capacitors C6-C8 ...
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1 vote
1 answer
153 views

MCP4011 - Exposed pad - connect to GND?

I'm planning to use an MCP4011-xxx/MC (DFN version). This package has an exposed PAD. But nowhere in the datasheet, I can find the information if this exposed PAD should remain NC or tied to GND/VSS. ...
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0 votes
2 answers
206 views

Altium Designer: polygon pour on signal layer

I'm designing a board around 2 Texas Instruments TPS65988. In the datasheet a layout example is shown where "fins" are placed around pads to provide further thermal dissipation. A pour to create this ...
12 votes
4 answers
5k views

Square vs Round pad

I'm curious why PCBs have one square pad in row for 0.1" headers. What is purpose of putting one square pad? What it indicates? Can you push more amps through square pad than round?
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0 votes
1 answer
234 views

Eagle: Converting DXF circles to pads

Is it possible to convert shapes from DXF file to pads in Eagle? Is it possible to convert circles to Eagle pads? I have just arranged and positioned things using Fusion360 and now I want to convert ...
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