Questions tagged [solder-paste]
Solder paste is used to connect smd's to the lands on the pcb.
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Identical component on both sides of PCB with vias in ground pad
I have a dual analog output PCBA that I am routing. The analog output component selected is two TI DAC7750IRHAR DACs.
These DACs are controlled via SPI lines. I had originally intended to place both ...
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How is this USB connector supposed to be soldered
I'm using this USB-C connector in a project but could not figure out how it should be soldered to the PCB. I could not figure it out from the datasheet either. It says it is an SMT component - does ...
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How to solder stainless steel electrode to PCB pad?
My goal is to solder stainless steel electrodes to a PCB in order to make a device that can measure differential voltage measurements from a surface.
How do I attach stainless steel to a PCB to create ...
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VL53L0X Assembly Soldering Problem
We have a product(PCB) in mass production as using VL53L0X.
There is a problem with some of our products.
We tested before sending customer. There is no problem. But, over time we have received ...
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How dangerous is soldering lead gas? [duplicate]
I get exposed to the gas of solder lead and/or flux all the time when I solder. How dangerous is it? Should I avoid it at all costs or it's not of a big deal as people think?
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How to save on solder paste usage on the SMT line?
We are using about 500g of solder (enough to scan solder) on 1 line and only reuse it for the 2nd time (cannot use the 3rd time) and then discard the used solder.
The problem is that the amount of ...
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Is there a rule of thumb or an IPC standard for reducing (windowing) solder paste deposition on exposed pads?
I am creating a footprint for a 24-pin QFN package with exposed thermal pad. Sometimes manufacturers will provide solder paste mask guidelines in addition to metallization for the landing pattern, but ...
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Is dry or drying solder paste effective on a circuit board
My circuit board has some 80 components. I'm in prototype stage, that is: stenciling with solder paste, placing parts and hot plate soldering. I see that by the time I get to placing the 80th part, ...
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What are the practical differences between solder balls and spherical tin powder?
Solder balls are made of tin, with small amounts of silver and copper. The minimum size of solder balls is limited. Nano spherical tin powder is available in smaller particle sizes. If such a tin ...
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Solder reflow pure nickel strip to PCB ENIG pads
I've arranged for a custom shaped strip of pure nickel that I intend to solder to ENIG pads on a PCB using reflow/paste.
Will we have problems getting the solder to adhere to the nickel? Is there a ...
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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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Soldering MEMS sensor
I have a problem with soldering the LIS2DH12 MEMS sensor accelerometer. I searched for soldering recommendations but I do not understand exactly how to solder.
I couldn't find the needed heat and ...
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What's going wrong with my solder paste / mask?
A short question this - I've got a board with a QFN-32 0.4mm pitch footprint, I ordered this stencil, and a tube of this solder paste, and the result is in the picture below.
Now, I'm new to this, but ...
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Thermal pad with a via: how to deal with solder paste?
I have a TLC59283RGET part which comes in a VQFN24 housing.
It has a thermal pad on the bottom.
In my schematic, I have placed a via on that thermal pad, so I can route it as GND to other places.
I am ...
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Solder paste and perfboard/prototype board/donut board destroying the circuit?
Does perfboard/prototype board/donut board made of paper or something (at least it's not fiberglass, that much I know) become conductive when heated to the point of becoming black? I'm assuming these ...
user277524
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Tips for placing small SMD components onto PCB
I am trying to assemble a PCB that has very small components, an example datasheet is below. I am using tweezers, microscope, and a stencil to apply the solder paste. But this is no match for shaky ...
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Determining reflow oven temperature wave and best practices
I am new to reflow soldering and am wondering the general approach for determining reflow wave setpoints. The solder paste I am using is MG chemicals data sheet and am using several decently ...
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Untented via close to ground paddle
I have designed a board and found an open (untented) via very close to a ground paddle as shown below -
The via in question is DVDD12 (shown to the center-right. I am going with a stencil based ...
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Solder paste storage
Solder paste should be stored in a refrigerator and it has an expiration date. But what exactly will go wrong when it is stored at a higher temperature or past its shelf life? From what I know, solder ...
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Are soldering fluxes safe to touch?
I'm new to PCB soldering. I just bought a cheap soldering iron, solder wire and flux to try something. I have no previous experience with soldering.
I'm well aware of the potential risks of prolonged ...
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Solder paste not melting or sticking
I am a rookie in this area so please excuse my language as I don't know all terms.
The solder paste I am using does not either melt or stick and just looks dry when I try to solder a LED onto a MCPCB.
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Can I expect a solderpaste circle to reliably reflow onto a smaller circlular pad?
For various reasons, I need to pad a bit more solder paste onto a fixed-size pad, and I cannot change the stencil thickness without messing up other footprints.
The pad is a 1.2mm diameter circle, and ...
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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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Pads acting as heat sink for LED design
I am using traces much wider than the LED footprint to dissipate heat. What design guidelines should I follow when making design like this.
Should I add solder mask expansion between anode and ...
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How solder paste is different from tin when soldering?
I recently bought this solder paste, thinking solder paste should do the trick when not using tin wire. Did I buy the wrong solder paste or does solder paste have another function since looking at it ...
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Going over IC max temp in reflow oven?
I'm a beginner-ish in PCB making and I want my workflow to be faster by using an oven instead of doing all the solder by hand. I searched for few hours without answer to my question.
A low temperature ...
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Soldering QFP with thermal pad (but with obstructions/no vias on underside)
I will start by saying that I'm a complete newbie when it comes to soldering SMD. I've been practicing with scrap boards, and I'm getting there, but not sure how to approach this one.
I am trying to ...
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Proteus thermal exposed copper (opening) for the pcb layout
I am using Proteus 8.7 and I am so confused about how to make a power plane (copper pour) exposed .
I mean I want that area free from green mask so that It can make its use as thermal dissipation area....
user210324
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How do you prevent solder paste from bleeding to nearby pads when using a solder stencil?
This is the first time I've done this but I've tried about ten times now:
That particular image is of the pads for an ESP-32. It's not a perfectly representative picture because the bridging isn't ...
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Why are the same alloys solid in solder wire and liquid in solder paste?
Is there a chemical difference between alloys in solder wire and alloys solder paste that make solder wires solid and solder paste fluids?
For instance, this solder wire and this solder paste both ...
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Please recommend the tool set that fits the project [closed]
I'm looking at a few tools to make Surface Mounted Device RGB LED on a PCB. I used a heat gun yesterday for the first time. A video shows another method using a heated pad. And then yet another, more ...
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Can I remelt flux paste?
I have a container with flux paste.
It is not very practical so I would like to transfer it to a syringe.
Can I simply melt it by heating it (double heater with water)?
It is also pointed out that ...
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What is the main factor silver in solder wire?
Previously I was using traditional soldering wire 60/40 Sn/Pb (stannous)(lead). Restriction of Hazardous Substances (RoHS) says that Pb (lead) is dangerous for environment. So we should not use lead. ...
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How to clean solder flux paste
I gave a motherboard circuit board to local a repairing professional. He traced and soldered some chips but it is not still working and advised to show motherboard to manufacturer service center.
But ...
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Reflow Soldering at home
I’m trying to solder my TSSOP-16 chip to the DIP adapter. I’m planning to apply solder paste to the adapter’s pads, put the chip on the adapter and then use my kitchen oven to melt solder paste and ...
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Why are there no nichrome resistor pastes?
Nichrome wire is commonly used for wire coil heating elements.
Other heating elements are formed by screen printing a pattern of "resistor paste" onto a dielectric coated substrate. These pastes are ...
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Via in pad, reflow soldering problem
Recently I've designed a PCB for the ESP8266EX-chip. With my amount of knowledge, I thought it would be smart to stitch vias into pads. To be specific, not only the ground pad of the chip, but also ...
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Solder bridging when reflowing QFP
Today I attempted to reflow solder a board using a solder paste mask and a hot air station but for a QFP chip, I got a of solder bridging. This has generally been my experience with trying to solder ...
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Solder Paste and Solder Land in Altium Designer / CircuitStudio
I am designing a footprint for the SOT765-1 using Altium CircuitStudio, and I am a bit confused regarding the solder paste and solder land definitions found on Page 3/5 of this datasheet. For the ...
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Small DFN chips come out twisted from the oven
This is a 2 x 2 mm chip with 12 no lead contact points. Half of the time I get it out of the reflow oven, it's twisted like in the image below.
I am using a stencil in order to lay the paste down and ...
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How do i solder qfn package using soldering iron?
I don't have any soldering station but I need to solder the qfn package chip so how I solder it using a normal soldering iron.
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LGA parts and hot air soldering
Does the solder pattern on these huge pads indicate what might be going on ?
The parts would not work about 80% - 90% of the time. I am trying to follow the ramp_up-soak-reflow-ramp_down curve to ...
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Double-sided Assembly
I'm going to assemble a prototype PCB which have components on both sides. I have access to a reflow oven with profiling control, solder paste and stencils (from OSH-Park)
In the reflow process for ...
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Is the solder paste file necessary for through-hole components?
I have designed a PCB. There are only through hole components on the top layer, and only surface mount components on the bottom layer.
Is TOP SOLDER PASTE file necessary to send to the PCB fabricator,...
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Transitioning to lead-free reflow and soldering
I have recently been thinking about moving to a lead-free process for my production and though I've been reading up, I was hoping someone more knowledgable than me would be able to point me in the ...
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Solder Pad and Stencil Mask Data Sheet - Confused
I am using Autodesk Eagle. Need to create a footprint for CREE LED XHBAWT which is in the XLAMP XH-B series.
I do not understand the Datasheet drawing of the footprint, attached.
Are the lower views ...
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Can aluminum solder paste be used in electronic circuits?
Is a paste like Solder-It Aluminum Solder Paste ALP-21 suited for electronics? Are there going to be any issues with the solder under constant current due to chemicals in the paste or something like ...
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Solder paste stencil
I am ordering the stencils and I do not know if I shuld order .12 o .1 ones. There are some TQFP64 ISs and 0603 passive elements. I'd like to avoid bridges.
Thank you
Peter
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Thermal Paste on Cold Side of Peltier Freezing and not transferring "Heat", what gives?
I am running a peltier element, and on the cold side an aluminum heat sink to effectively spread out the cool surface to the maximum possible surface area.
I just bought this new thermal paste: ...
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Assemble a 9 * 9 * 0.05 mm steel foil and castellation PCB using standard pick and place
I have a hybrid PCB where I want to assemble a very thin steel foil on a PCB using standard pick and place SMT process. the picture below describe how the foil is like:
The orange area is only hold ...
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