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OSP Surface Treatment Process – A Complete Guide

Printed Circuit Board (PCB) is the foundation of modern electronic products, and its manufacturing process includes multiple process links, among which the OSP surface treatment process is an important part of the PCB manufacturing process. The OSP surface treatment process refers to the formation of a protective layer to prevent oxidation on the PCB to improve the reliability and stability of the product. This article will give a detailed introduction to the OSP surface treatment process in the PCB process, including its process requirements and advantages.

Table of Contents
What is PCB OSP surface finish

OSP surface treatment process requirements

The purpose of the OSP surface treatment process

OSP Surface Treatment Process
OSP Surface Treatment Process

The main purpose of the OSP surface treatment process is to form a protective layer on the PCB board to prevent oxidation, so as to improve the reliability and stability of the product. At the same time, the OSP surface treatment process can also reduce the impact on subsequent processes, such as drilling and assembly.

Process flow of OSP surface treatment process

The process flow of the OSP surface treatment process is as follows:

(1) Cleaning: First, clean the PCB board to remove impurities such as oil and dust.

(2) Pretreatment: Pretreatment of PCB boards, including chemical cleaning, oxidation removal, etc.

(3) OSP solution treatment: Immerse the PCB board in the OSP solution, and control the temperature, concentration and time of the solution to form a protective layer on the surface of the PCB board to prevent oxidation.

(4) Drying: Take the PCB board out of the OSP solution and dry it to remove excess water and solvent.

(5) Inspection: inspect the PCB board to ensure that its surface quality and performance meet the requirements.

Process requirements of the OSP surface treatment process

(1) Cleaning requirements: Cleaning is the first step in the OSP surface treatment process, and its cleaning effect directly affects the quality and performance of subsequent processes. Therefore, it is required that the cleaning agent used in the cleaning process should have a good ability to remove oil and dust and other impurities, and should also have the characteristics of low toxicity and environmental protection.

(2) Pretreatment requirements: Pretreatment is to remove the oxide layer and other impurities on the surface of the PCB board to improve the effect of the OSP surface treatment process. Therefore, chemical cleaning agents and oxidation removers should be used in the pretreatment process to achieve the desired effect.

(3) Requirements for OSP solution treatment: OSP solution treatment is the core link of the OSP surface treatment process, and its treatment effect directly affects the surface quality and performance of the PCB board. Therefore, parameters such as temperature, concentration and time of the OSP solution should be strictly controlled to ensure that a uniform and dense protective layer is formed on the surface of the PCB.

(4) Drying requirements: Drying is to remove excess moisture and solvents on the surface of the PCB board to ensure its surface quality and performance. Therefore, appropriate drying equipment and methods should be used in the drying process to ensure that the moisture and solvent content on the surface of the PCB board meets the required standards.

(5) Inspection requirements: Inspection is an important link to ensure that the surface quality and performance of PCB boards meet the requirements. Therefore, inspectors are required to have good inspection skills and equipment, and at the same time, strict inspection standards and methods should be formulated to ensure product quality and performance.

Advantages of OSP surface treatment process

Advantages of OSP Surface Treatment Process
Advantages of OSP Surface Treatment Process

Improve reliability and stability: The OSP surface treatment process can form a protective layer on the surface of the PCB to prevent oxidation to improve the reliability and stability of the product.

Reduce the impact on subsequent processes: The OSP surface treatment process can reduce the impact on subsequent processes, such as drilling, assembly, etc., thereby improving process efficiency and quality.

Cost reduction: Compared with other surface treatment processes, such as electroplating, OSP surface treatment process has the advantages of low cost and environmental protection.

Application range of OSP surface treatment process

OSP surface treatment process is widely used in the production and processing of PCB boards, including mobile phones, computers, automobiles, home appliances and other fields. At the same time, the OSP surface treatment process can also be applied to the manufacturing and processing of other electronic products, such as smart wearable devices, Internet of Things devices, etc.

FAQ

The OSP surface treatment process refers to the formation of a protective layer to prevent oxidation on the PCB to improve the reliability and stability of the product.

  • Improve reliability and stability
  • Reduce the impact on subsequent processes
  • Cost reduction

OSP surface treatment process is widely used in the production and processing of PCB boards, including mobile phones, computers, automobiles, home appliances and other fields. At the same time, the OSP surface treatment process can also be applied to the manufacturing and processing of other electronic products, such as smart wearable devices, Internet of Things devices, etc.

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