All Questions
14
questions
4
votes
1
answer
283
views
SMT Reflow solder quality issue with SN42/BI58 paste
I have been doing hardware design and PCBA prototyping for a while and I have issues with quality of reflow soldering. I have a small lab including a pick'n'place machine, stencil printer (eC-stencil-...
- 453
0
votes
0
answers
77
views
QFN-28 REVERSE Breakout Board
I am trying to build a PCB board that I found on GitHub. In a rash we ordered few sets of the PCBs without inquiring about the parts availability. Turns out one of the parts is not available in all ...
- 109
6
votes
1
answer
470
views
Why do I have shorts/bridges on QFN packages on PCBA during assembly? Stencil Printing problem
I am trying to do a home assembly of PCB but I have issues after reflow soldering. Especially I have bridges/shorts on the pins of QFN packages. I have assembled multiple boards other joins are okay ...
- 453
4
votes
1
answer
2k
views
Solder SMD on through hole
Can I just solder an SMD part directly on the through holes of the PCB?
The pitch of SMD matches the pitch of the through holes.
- 161
11
votes
7
answers
5k
views
Hand soldering SMD 1206 components [closed]
Because I tried to wire-solder a protoboard which failed miserable, I'm intending to order a PCB. However, to minimize the area, I want to use some SMD1206 components. I ordered some basic ones (...
- 14k
7
votes
1
answer
1k
views
How to remove kapton tape from soldered parts in bulk?
I have PCBs with SMT nuts (SMTSO2060MTJ) which has been assembled onto a PCB - the nut has kapton tape on top to allow easy pickup for assembly.
However, removing the kapton post reflow is proving ...
- 462
33
votes
6
answers
7k
views
SMD soldering: tiny components stick to tweezer point
When soldering SMD components, the 2-pinned ones (like resistors, capacitors, ...) are the hardest in my opinion.
I started long time ago with the 1206 format. Then scaled down to 0804, 0603 and ...
- 2,369
3
votes
2
answers
1k
views
Stencil at home with extremely small parts?
I was amazed lately to find out about solder paste - so we can assemble our PCB prototypes at home relatively easily.
The process seems easy, but now I started to suspect I am going to have a problem ...
0
votes
2
answers
1k
views
Small 'blistering' under surface-mount soldering attempt - is this a problem?
I am very new to SMT soldering - and have started with a small project.
I used resin flux, followed by a small amount of solder paste and then a hot air gun at around 373 degress celcius to flow the ...
- 454
5
votes
7
answers
5k
views
Why are there no easy-to-solder SMD diodes in 0603 packages?
What seem to be the most popular SMD diodes currently come in SC-79 packages, but they super tiny and really hard to hand solder...
...and they also can be a hassle even for reflow.
So I thought I'...
- 10.2k
0
votes
4
answers
1k
views
What is the optimal way of clearing solder from surface-mount PCB pads for rework?
Say I have an assembled PCB with a QFP package on it. This device gets damaged and I need to replace it. Getting the device off is straightforward, but now all the pads have solder blobs on them. Is ...
- 17.6k
9
votes
1
answer
1k
views
Soldering 0.5mm pitch ICs using stencil and reflow oven
I'm new to SMD soldering, and tried to assemble a couple of boards, using a reflow oven.
I 'm using a stencil (Kapton - mylar) and so far it worked fine except for the LQFP48 devices (pitch 0.5mm). In ...
- 191
3
votes
2
answers
393
views
Is this part hand-solderable, or will certainly require reflow soldering?
Here are the mech specs for the part (it is a GSM module) -
Note that all dimension are in "mm".
If hand-solderable do I need to keep some specific precautions in mind (from soldering standpoint). ...
- 3,534
21
votes
9
answers
5k
views
Sizing SMD components for Hobbyist Kits
More components are only available in SMD packages.
For hobbyist assembly the options are to buy breakout boards or
solder SMD.
Since components are usually packaged in a couple of SMD
package ...
- 11.7k