Soldering integrated circuits with a sufficiently large lead pitch may well be carried out at home. The main thing is to choose the right soldering iron for this and develop the skills to use it.
Instructions
Step 1
When choosing a soldering iron, remember that tip diameter is much more important than power. It is less convenient to solder microcircuits with a low-power soldering iron with a large sting than with a powerful one, but with a smaller diameter tip. Nevertheless, it makes no sense to buy a tool with a power of over 30 W - it will overheat, which will make soldering almost impossible. Soldering stations with automatic temperature stabilization are very convenient. They use more powerful soldering irons, but they periodically turn on and off to maintain a constant temperature, like irons. Set the temperature for the solder you are using (lead or lead-free).
Step 2
Choose your flux wisely. It must be neutral (that is, not acidic). Otherwise, some time after the implementation of a seemingly flawless soldering, corrosion will occur. Don't be fooled by claims that flushing the flux will solve this problem, as it is impossible to flush out the acid completely.
Step 3
Solder the microcircuit intended for installation in the holes of the board as follows. Make sure it is oriented correctly first. If you accidentally solder it upside down, it will be very difficult to solder it out. Just in case, when installing the microcircuit, do not bend its leads from the back side - suddenly you will still need a soldering.
Step 4
Solder the pins for power supply first. Only then carry out the same operation with respect to the remaining conclusions. If the microcircuit is sensitive to static electricity, use a special bracelet connected through a megohm resistor to the common wire of the board.
Step 5
Do not allow the leads of the microcircuit to be short-circuited with solder. If this does happen, cover the jumper with more flux and then heat the leads alternately until they open. A special solder suction device, copper braid and even a toothpick can also help here. The removed excess solder can be reused.
Step 6
SMD chips must first be pressed to the board, several pins soldered, and only then can the rest be soldered without applying force. If the microcircuit is very small, use tweezers to press it down with tweezers instead of finger, so as not to burn yourself. If desired, do not drill holes in the board, even if the microcircuit is designed for this. Bend its leads sideways, after which it will be possible to solder them to the contact pads.
