What Role Does Steel Mesh Play in SMT Production
SMT production requires steel mesh. This article introduces what steel mesh is and its role in the SMT production process.
PCBA is what we call it when mounting
components with specific electrical performances on PCB in accordance with the determined BOM or
position number. After that, using solder paste to position electronic components, then wave soldering
them together to form the circuit board. This will achieve the circuit function and improve
productivity.
Red Glue and SMT Solder Paste
Solder pastes and red glues are fluids that have a certain viscosity. Steel mesh is laser-cut and
designed according to Gerber files of the PCB. Through the mesh holes, the solder paste can be printed
onto the PCB pad (or red glue can be printed and fixed to the bottom of each component).
The scraper is moved forward at an angle and speed that causes to generate pressure. This pressure will
push the solder to roll up in front of it, creating the pressure needed to inject the solder into the
mesh. The solder paste’s viscous friction causes shear between the stencil and scraper. The shear
forces reduce the viscosity and allow the paste to be injected smoothly into the mesh on the PCB or the
leak hole.
SMT Steel Mesh
The SMT steel grid is a precision fixture that can be used to print solder paste on PCB pads, or to glue
components between pads and to weld to create the electrical properties specified by PCBA.
