Mesh used for fixing steel slice and mesh frame, can be divided into stainless steel mesh and polymer tension, but use time too long, stainless steel wire netease deformation lost tension; Polyester net fly organic matter is often used 100 mesh, it is not easy to deformation, long service life.
That is to open the copper slice, stainless steel slice, nickel alloy, polyester and so on. Generally, foreign high quality 301/304 stainless steel slice is used as the stencil, which can greatly improve the service life of the template due to its excellent mechanical properties.
The glue used to stick the mesh frame and steel slice plays a bigger role in the stencil, which can be specially used according to different customer's usage. This glue can maintain a firm adhesive force and can resist the complex cleaning of various template cleaning agents.
1.PCBONLINE adopts laser cutting method, which is characterized by the high precision of data production, little influence of objective factors, easy to demodulate by trapezoidal opening, accurate cutting and moderate price.
2.Stencil process specification of PCBONLINE
A.About the SMT stencil aperture design,The upper and lower holes are naturally trapezoidal, and the upper hole is usually 1~5mil larger than the lower hole, which is conducive to the release of solder paste.
B.The hole size error is about 0.3~0.5mil, and the positioning accuracy is less than 0.12mil.
C.The SMT stencil thickness is usually 0.10~0.3mm.
3.About the SMT stencil design, PCBONLINE will fully consider the mold release of solder paste, instead of blindly pursuing the width/thickness ratio or area ratio and ignoring other technological issues, such as tin connection, tin, etc. In addition, for chip elements above 0603(1608), we pay more attention to how to prevent tin beads.
PCBONLINE provides two types of stencils, one is SMT stencil frame, the other is SMT stencil Non-frame, you can order online from us according to your own requirements, the specific parameters are as follows: