Jia Jinyuan explains the introduction and selection of solder paste?

Everyone knows that there are many kinds of solder paste products on the market. In response to this situation, we should all be able to distinguish them clearly. It is very important to choose a suitable one for our own products for soldering. Some manufacturers, in order to reduce costs, use some relatively cheap products, which is not a good thing. Solder paste is always presentSMTA new type of welding material that emerged as The Times require. Solder paste is a complex system, which is a paste composed of solder powder, flux and other additives. Solder paste has a certain degree of viscosity at room temperature and can initially bond electronic components to the designated positions. At the soldering temperature, as the solvent and some additives evaporate, the components to be soldered are soldered together with the printed circuit pads to form a permanent connection. The following is some introduction and selection from the solder paste manufacturer:

How to choose solder paste:

Select the grade of solder paste based on the value of your own products and the application direction of the products. For some products with specified high requirements, high-quality solder paste is needed. Relatively speaking, the price of solder paste will be higher than that of ordinary ones.

The application process and technology on different products are largely similar. The composition of solder paste should be selected based on individual circumstances. For instance, the amount of silver in lead-free solder paste varies in application.

Choose solder paste based on whether it can be cleaned. You can choose solvent-cleaning solder paste, water-soluble solder paste, or no-rinse solder paste (it is best to choose no-rinse halogen-free solder paste).

Different active solder pastes should be selected based on the storage time of the product and the degree of surface oxidation. Currently, they are widely usedSMTProduct, adoptedRMAGrade solder paste can meet the requirements. However, some products on aerospace and military equipment need to be adoptedRGrade active solder paste.

According toPCBThe particle size of the tin alloy in the solder paste is selected based on the structural composition of the plate.

Select solder paste of different viscosities based on the way of applying solder paste during production and the assembly density.

The above is to explain to everyone how we should make a choiceSolder pasteInstead of making a choice without clear understanding, this can reduce unnecessary troubles for both oneself and the product's welding. If you have any further questions, feel free to consult! Everyone can discuss it together.