I. Quality control of solder paste

1. Select high-quality solder paste

In addition to selecting solder paste from a reliable manufacturer, the shelf life and batch stability of the solder paste should be considered.

Different solder pastes have different viscosity and fluidity, so using a solder paste that is compatible with the solder paste printer can improve printing speed.

2. Storage and use of the environment

Set up a special solder paste storage room to maintain constant temperature and humidity.

Follow the “first-in-first-out” principle to ensure the use of the latest production of solder paste.

Stir the paste thoroughly before use to eliminate particle settling and agglomeration.

II. Equipment and process optimization

1. Adjust the speed of the conveyor belt

Find the conveyor belt speed setting option on the control panel of the solder paste printer.

Increase the belt speed gradually until the desired speed is reached. Note that too fast a conveyor belt speed may lead to a drop in print quality, so a balance is needed between speed and quality.

2. Adjusting the solder paste printer head speed

Locate the print head speed setting option on the control panel of the solder paste printer.

Increase the print head speed gradually until the desired speed is reached. Again, attention needs to be paid to the balance between speed and quality.

3. High Precision Stencils

Choose a laser cut stencil to improve hole opening accuracy and edge definition.

Regularly check the wear and tear of the stencil and replace it in time.

III. The stencil and paste characteristics of matching

1. Stencil selection

Select the appropriate stencil material and thickness according to the PCB board design.

The shape of the stencil openings should match the shape of the pad to reduce printing errors.

2. Solder paste particle size

Select different particle sizes of solder paste for different PCB board pitches and pad sizes.

Fine particles of solder paste for high-density, fine-pitch PCB board.

IV. Environment Control

1. Temperature and humidity

Printing workshop should be equipped with constant temperature and humidity system to maintain suitable environmental conditions.

Avoid printing operations under extreme weather conditions.

2. Cleanliness

Clean the stencil, squeegee and printing press table regularly to prevent contamination.

Use special cleaners and tools for cleaning.

V. Process Monitoring and Inspection

1. Implementation of automatic optical inspection

Select high-precision SMT AOI equipment for real-time monitoring of printing quality.

Set reasonable detection parameters and alarm thresholds to detect and deal with printing defects in time.

2. Personnel training

Regularly train and assess operators on solder paste printing technology.

Emphasize the awareness of safe production and quality control, and improve employees’ responsibility and operation skills.

VI. Continuous improvement and innovation

1. Data Analysis

Collect and analyze data from the printing process to identify potential problems and improvement points.

Utilize statistical process control (SPC) and other methods for data analysis.

2. Technological Innovation

Pay attention to industry dynamics and technology development, introduce new technology and new equipment.

Carry out R&D activities to improve the independent innovation ability of solder paste printing technology.

About NeoDen

1. Zhejiang NeoDen Technology Co., Ltd. Established in 2010, 200+ employees, 8000+ Sq.m. factory.

2. NeoDen products: Smart series SMT machine, NeoDen N10P, NeoDen9, NeoDen K1830, NeoDen4, NeoDen3V, NeoDen7, NeoDen6, TM220A, TM240A, TM245P, reflow oven IN6, IN12, IN12C, Solder paste printer FP2636, PM3040.

3. Successful 10000+ customers across the globe.

4. 30+ Global Agents covered in Asia, Europe, America, Oceania and Africa.

5. R&D Center: 3 R&D departments with 25+ professional R&D engineers.

6. Listed with CE and got 50+ patents.

7. 30+ quality control and technical support engineers, 15+ senior international sales, timely customer responding within 8 hours, professional solutions providing within 24 hours.