Types of soldering materials for electronic circuits

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What materials should be used for soldering electronic circuits? The following article will introduce the necessary materials used in soldering electronic circuits for everyone to know.

What is electronic circuit soldering?

Electronic circuit soldering is a technique of surface bonding two or more electronic components together. This technique will use the method of melting solder and then applying it around the position to be soldered. After this solution cools, it will create a solid connection between the two components.

soldering electronic circuits

Materials used in soldering electronic circuits

In soldering electronic circuits, people often use the following materials:


Solder is an indispensable material for soldering electronic circuits. This substance will be put into the soldering iron or welding machine to melt, forming a liquid solution to spread on the position to be soldered. The main components of solder are tin and lead. Which, the lead element will account for a smaller percentage than tin, namely 63% tin and 37% lead, or 60% tin and 40% lead. Besides, there will also be some types of lead-free solder that will be replaced with some other metals, such as Ag, Cu, Ni, etc., depending on the corresponding ratio. Currently, solder is produced in 3 main forms:

Solder coil wire

The identifying feature of coil solder is that it has a small beveled solder wire wrapped in each loop around a plastic core. Normally, solder coils are commonly used in the automatic wave soldering process and repair electronic boards by soldering waves and soldering stations.

soldering electronic circuits

With welding coils, there will be many types for you to choose from to suit your needs:

  • Solder coil: has a low melting point, easy to use
  • Lead-free solder coil: safe for human health and the environment
  • Soldering coils contain flux cores, which increase adhesion for solder joints and make it easy to clean up dirt after soldering.
  • Halogen-free solder coils contain a flux core but do not contain environmentally friendly halogen.

Tin Bars

Tin bars are a type of solder produced in the form of a bar and are often used in the automatic wave soldering process. With this type, you will have to melt the tin bar first to form a liquid and then start soldering the electronic circuit. The classification of tin bars will be based on the alloy composition contained in the product. Normally, there are two main types of rods: leaded solder and lead-free solder.

soldering electronic circuits

Solder paste

Solder paste is a material that is very suitable for use in automatic surface soldering lines and printed circuit assembly processes. Similar to solder coils and solder bars, solder pastes are also classified into the following categories:

  • Lead solder paste
  • Lead-free solder paste
  • Low-temperature solder paste
  • Solder paste used in the automatic robot inspection line

soldering electronic circuits

Tin Solder Ball

Tin solder balls are made from pure metal to create alloys in the solder. The application of solder balls is in the field of packaging semiconductor components: PBGA, CBGA, TBGA, CSP, and Flip Chip.

Solder flux

Solder flux, also known as solder flux, is a type of material that helps to increase the adhesion of solder materials, including solder paste, solder coils, and solder bars, to the surface of electronic circuits. Solder fluxes are divided into four types as follows:

  • No-Clean Flux (NC)

The property of this flux is that it leaves no residue on the solder surface. So it helps to reduce the cost of using solder flux cleaning agents.

  • Halogen-free Flux

This is a halogen-free flux. The characteristic of this stream is that it can evaporate in the air. However, the disadvantage is that it is not environmentally friendly and causes rust on the circuit board.

  • Water-degradable solder flux

This type of flux is environmentally safe and easy to clean after soldering.

  • Flux for automatic wave soldering

The advantage of this solder flux is its good anti-rust properties, making it suitable for use in machines that have the ability to automatically look up circuit boards.

soldering electronic circuits

View more: Solder Paste

View more: Solder Bar

View more: Solder Wire

Above are the types of materials used in soldering electronic circuits that are very popular today. Customers wishing to buy these materials should contact The tech! We are the supplier and distributor of genuine and reputable electronic circuit welding materials in the market. Customers will definitely receive super-preferred prices when buying from us.

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