SMT

Cleaning Process Before Conformal Coating of PCBA Circuit Boards: Analyzing the Necessity of Coating!

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Cleaning Process Before Conformal Coating of PCBA Circuit Boards: Analyzing the Necessity of Coating!

Introduction: The conformal coating of PCBA (Printed Circuit Board Assembly) is an important part of the three-proof technology for military electronic equipment. Its purpose is to further enhance the resistance of the circuit board to adverse environmental effects during storage and operation, and to improve the mechanical performance of components against shock and vibration, achieving … Read more

PCBA Appearance Inspection Standards (Illustrated)

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PCBA Appearance Inspection Standards (Illustrated)

1. Purpose: To provide a basis for the appearance inspection of PCBA products produced at our SMT station. In cases where the specific appearance standards conflict with customer requirements, customer requirements shall prevail in principle. 2. Scope: This standard references IPC-610D (for dedicated service electronic products) PCBA appearance inspection standards and is applicable only to … Read more

What Items Should Be Inspected on PCBA Boards and What Are the Inspection Standards?

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What Items Should Be Inspected on PCBA Boards and What Are the Inspection Standards?

1. What Are the Inspection Standards for PCBA Boards? First, let us understand the introduction of quality inspection standards: 1. Critical Defects (denoted as CR): Any defect that can cause harm to humans or machines or endanger life safety, such as non-compliance with safety regulations, burning machines, electric shock, etc. 2. Major Defects (denoted as … Read more

Standards for Environmental Management in PCBA Workshops

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Standards for Environmental Management in PCBA Workshops

SMT stands for Surface Mount Technology, which is currently the most popular technology and process in the electronic assembly industry. It is a circuit assembly technology that mounts surface-mounted components (referred to as SMC/SMD, known in Chinese as chip components) on the surface of printed circuit boards (PCBs) or other substrates, using methods such as … Read more

Component Misalignment: Circuit Board Issues and Solutions

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Component Misalignment: Circuit Board Issues and Solutions

Polarity components require special attention throughout the PCBA processing, as incorrect orientation can lead to mass failures and the complete failure of the PCBA board. Therefore, it is crucial for engineering and production personnel to understand SMT polarity components. 1. Definition of Polarity Polarity refers to the positive and negative terminals of a component or … Read more

SPI, AOI, and X-Ray: The Triple Guardians of SMT Production

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SPI, AOI, and X-Ray: The Triple Guardians of SMT Production

In the SMT (Surface Mount Technology) production line, the birth of each circuit board is a game of precision and efficiency. From solder paste printing to component placement, and then to soldering and curing, even the slightest flaw in any link can trigger a “butterfly effect”—leading to unstable product performance at best, or mass rework … Read more

Understanding the Past and Present of PCB Circuit Boards

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Understanding the Past and Present of PCB Circuit Boards

When it comes to circuit boards, many people should be familiar with them, as they are ubiquitous in our lives, from small devices like Bluetooth headsets, electronic watches, and calculators to larger systems like computers, communication devices, and military/aerospace systems. Wherever integrated circuits are needed, they rely on PCB to carry electronic components. Before PCB … Read more

How Are Circuit Boards Made? Equipment Needed in Production

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How are circuit boards made? The production process of PCB boards can be roughly divided into: Printed circuit board—inner layer circuitry—lamination—drilling—plating through holes (first copper)—outer layer circuitry (second copper)—solder mask green paint—text printing—contact processing—shaping and cutting—final inspection and packaging. So there are many devices involved; what equipment does PCB need? Generally, the production of PCB … Read more

Summary of Circuit Board Failures and Repair Techniques

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Summary of Circuit Board Failures and Repair Techniques

1. Characteristics and Repair of Capacitor Failures in Industrial Control Circuit Boards Failures caused by capacitor damage are the most common in electronic devices, especially with electrolytic capacitors being the most prevalent. Capacitor damage manifests as: Reduced capacity; Complete loss of capacity; Leakage; Short circuit. Since capacitors serve different functions in circuits, the characteristics of … Read more

Why Design Test Points on Circuit Boards?

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Why Design Test Points on Circuit Boards?

Some Testing Service Projects: Materials: Physical Properties, Chemical Analysis, Biological Tests Reliability Testing of Components and Finished Products Formula Analysis, Formula Restoration Failure Analysis Product Certification National Customer Service Number: 4008180021 Add Customer Service WeChat anytesting001 to get daily R&D news The following is the main text: For those studying electronics, setting up test points … Read more