The production process of thin film high-precision resistors

The production process of thin film high-precision resistors is relatively complex and precise. The following are the main steps:

1、 Preparation stage
Material selection:
Choose appropriate resistive film materials (such as metal and alloy materials, metal oxide materials, etc.), substrate materials (such as ceramic materials, glass materials, etc.), electrode materials (such as precious metal materials, alloy materials, etc.), and protective layer materials.
Equipment preparation:
Prepare necessary production equipment such as precision printing machines, laser resistance adjusters, sintering furnaces, electroplating equipment, etc.
2、 Production stage
Base treatment:
Clean and dry the substrate material to ensure its surface is clean and free of impurities.
Back electrode printing and sintering:
Print the back electrode on one side of the substrate and perform sintering treatment to tightly bond it with the substrate.
Resistance film printing:
Using precision printing technology to print resistive thin film material onto a substrate, forming a resistive body. Accurate control of printing thickness and position is required during the printing process.
Surface electrode printing:
Print surface electrodes on both ends of the resistor and perform sintering treatment to tightly bond it with the resistor.
Laser Resistance Adjustment:
Use a laser resistance adjuster to fine tune the resistance value to ensure that it meets the design requirements. Laser resistance adjustment is a high-precision process method that can achieve precise control of resistance values.
Protective layer printing and sintering:
Print a protective layer on the resistor and electrode, and perform sintering treatment. The protective layer is used to protect the resistor and electrodes from external environmental influences, improving the stability and reliability of the resistor.
3、 Subsequent processing stage
Cutting and Electroplating:
Cut the resistor to form independent resistance elements. Then, electroplating treatment is carried out on the electrode to improve its conductivity and corrosion resistance.
Testing and Sorting:
Test the completed thin film high-precision resistor to check whether its resistance, accuracy, temperature coefficient and other performance indicators meet the requirements. Then, based on the test results, the resistors are sorted to ensure that the performance of each resistor meets the design requirements.
Packaging and Marking:
Encapsulate qualified resistors to protect them from external environmental influences. At the same time, mark key information such as resistance and accuracy on the resistor for future use and management.
4、 Quality Control and Testing
Throughout the entire production process, it is necessary to strictly control the quality of each link to ensure that each step meets the process requirements. At the same time, it is necessary to conduct comprehensive testing and inspection of the completed resistors to ensure their stable and reliable performance.

In summary, the production process of thin film high-precision resistors includes multiple stages such as preparation, manufacturing, subsequent processing, and quality control and testing. These links are interrelated and interdependent, together forming the complete manufacturing process of thin film high-precision resistors.