As a distinguished provider of PCB assembly solutions,

we recognize the pivotal role that stencils play in the intricate process of achieving precise and efficient solder paste deposition onto printed circuit boards (PCBs). Stencils stand as a cornerstone in ensuring the reliability, accuracy, and quality of the soldering process, significantly impacting the overall performance of electronic devices. We are able to make the stencils for our customers if in need.
  • What files are needed for making stencil?

PCB gerber fils in 274-D and 274-X formats for production with requirements like thickness,size, with or without frames and so on.

  • What are stencils?

Stencils, within the realm of PCB assembly, are thin sheets—typically crafted from stainless steel or polymer materials—with precisely cut apertures or openings. These apertures are strategically aligned with the solder pads and component footprints on the PCB layout, allowing controlled deposition of solder paste during the assembly process.

  •  What are the uses of stencils?

Accurate Solder Paste Deposition: Stencils serve as guides for the accurate application of solder paste onto designated areas of the PCB. This precision is critical for ensuring proper solder joints between components and the PCB during the subsequent reflow soldering process.

Uniformity and Consistency: Stencils contribute to uniform and consistent solder paste application, ensuring even distribution across solder pads, crucial for reliable connections and optimal functionality.

Customization and Compatibility: Stencils are customized according to the specific PCB design, with openings precisely matching the solder pad locations and component footprints. This customization ensures compatibility and alignment accuracy, enhancing overall assembly quality.

How to classify the stencils as per the manufacturing process?

Four kinds of different stencils are available based on their manufacturing methods and they are laser stencils, electrochemical polishing stencils, step stencils, bonding stencils, and etching stencils.

Laser-cut stainless steel stencils: renowned for their exceptional durability and high precision, laser-cut stainless steel stencils are well-suited for high-volume production runs and complex PCB designs. Their robust nature allows for repeated use without compromising accuracy.

Electrochemical polishing stencils:In order to make small, lightweight, and thin electronic products, ultra-small size components (such as 0201) and ultra-fine pitch components (such as μBGA, CSP) are widely used. Consequently, the higher requirements for stencils are unavoidable. Thus, have emerged. Different thicknesses can be achieved for this type from us.

Step stencils: Due to varying solder paste requirements for different types of components soldered on the same PCB, it is necessary to have different thicknesses in different areas in the same stencil. This has led to the creation of STEP-DOWN and STEP-UP stencils.
Bonding stencils: Bonding stencils are needed when the soldering is requested for PCBs with COB parts. Bonding stencils are made with covers at the location corresponding to the COB parts for protection as well as to facilitate the SMT process.

Etching stencils: Etching stencils are made out of 301 stainless steel. They are suitable for assembling PCBs with corner angles and where the parts pitches are equal to or greater than 0.4mm. They are also fitting for duplicating PCB and film use and can be used simultaneously with CAD/CAM and exposure methods. Scaling can be adjusted according to different parts without the need to calculate prices based on the number of parts. They are easily manufactured and their prices are cheaper than laser stencils. Moreover, they are convenient for customers to archive films.