GB/T 8553-2023 in English

Background of standard formulation and analysis of technological evolution

As an important component of electronic components, the performance of the crystal box directly affects the stability and reliability of the entire system. Since its release, GB/T8553-1987 has provided basic specifications for my country's crystal box industry. However, with the rapid development of electronic packaging technology, the original standard can no longer meet the needs of modern high-density and miniaturized packaging.

Key terms and professional explanations

• Base: The bottom support and sealing structure of the crystal box directly affects the reliability of the package.
• Cover: The top cover and sealing component that needs to match the base perfectly.
• Insulation resistance: An important indicator to measure the isolation capability between different conductive lines in the package.

Detailed explanation of technical requirements

The 2023 version of the standard has added a number of new technical requirements, including:

• Surface plating quality: The plating thickness must be within the range specified by the customer, and scratches are not allowed to expose the substrate.
• Solderability test: Use the IEC60068-2-20 method to ensure that the welding area is ≥95%.
• Flexural strength test: For ceramic materials, substrates with different alumina contents are required to reach specific strengths (Table 1).

Test methods and equipment

The standard specifies a variety of environmental test methods:

• Salt spray test: GB/T2423.17, lasting 48 hours, evaluating corrosion resistance.
• Constant humidity test: GB/T2423.3, simulating reliability in high temperature and high humidity environments.
• Temperature shock test: GB/T2423.22, evaluating the performance of packaging materials in extreme temperature changes.

Implementation suggestions

To ensure the effective implementation of the standard:

• Enterprises should establish a complete testing laboratory equipped with special equipment such as mass spectrometers and salt spray chambers.
• Refer to the standard tables (Table 1, Table 2) for parameter selection during the design stage.
• Carry out periodic inspections regularly to ensure stable quality of batch products.