SMT is a surface mount technology. SMT electronic jig processing is to mount the leadless or short lead surface assembly components on the PCB circuit board, and solder and fix them by reflow soldering.https://www.wondercopper.com/
Reflow soldering process: refers to a soldering process that realizes mechanical and electrical connection between the solder ends or pins of surface assembly components and the PCB pads by melting the solder paste printed on the PCB pads in advance. The process flow is: printing solder paste-patch-reflow soldering.
Solder paste printing: The purpose is to evenly apply an appropriate amount of solder paste on the pads of the PCB to ensure that the SMD components and the corresponding pads of the PCB are reflow soldered to achieve a good electrical connection and have enough Mechanical strength.https://tsmachining.com/
How to ensure that the solder paste is evenly applied to each pad? We need to make steel mesh. The solder paste passes through the corresponding openings of each pad on the stencil, and the tin is evenly coated on each pad under the action of a squeegee.
SMT electronic fixture processing
Mounting: using a mounting machine to accurately mount the chip components to the corresponding position on the PCB surface where the solder paste or patch glue is printed.
Reflow soldering: By melting the solder paste on the circuit board pads, the mechanical and electrical connections between the solder ends of the surface assembly components and the PCB pads are realized to form an electrical circuit.
Reflow soldering is a key processhttps://sandcasting.org/ in the processing of SMT electronic fixtures, and a reasonable temperature profile setting is the key to ensuring the quality of reflow soldering. Inappropriate temperature curve will cause soldering defects such as incomplete soldering, false soldering, component uplifting, and excessive solder balls on the PCB board, which will affect product quality.