Overview
IEC 62878-2-602:2021 is an international standard that provides guidelines and evaluation methods for the electrical connectivity of stacked electronic modules. Published by the International Electrotechnical Commission (IEC), this part of the device embedding assembly technology series addresses critical requirements to ensure reliable inter-module electrical connections in stacked 3D electronic assemblies. The standard is applicable to a wide range of electronic products where vertical stacking of modules is used to save space and enhance functionality, including high-end servers, network systems, and IoT devices.
Key Topics
- Scope: Defines requirements and evaluation methods for electrical connectivity specifically in stacked electronic modules.
- Test Apparatus: Specifies the equipment essential for accurate measurements, including digital multimeters, constant-current power supplies, X-Y stages, micro probers, and four-terminal measuring setups. This ensures precise low-resistance measurements between layers.
- Test Specimen Preparation: Outlines specimen construction, typically comprising at least three stackable modules stacked on a base substrate with a daisy-chained terminal layout for connectivity evaluation.
- Evaluation Method: Emphasizes the four-terminal measurement technique, proven effective for measuring low resistance values critical to determining inter-module electrical integrity.
- Test Procedure:
- Apply constant current between input and output force terminals.
- Measure voltage between corresponding sense terminals.
- Calculate the interconnect net resistance to assess connectivity quality.
- Specification Details: Includes standard test specimen outline size (25mm × 25mm), ball pitch (1.5mm), solder ball diameter (1mm), and pad dimensions to ensure consistency and lower plastic strain compared to similar packages.
- Stacking Assembly Methods: The standard provides representative examples of methods for module stacking assembly, helping manufacturers select appropriate techniques for their needs.
Applications
IEC 62878-2-602:2021 is specifically designed for advanced electronics manufacturing sectors where stacked electronic modules are prevalent. Practical applications include:
- High-performance computing: Servers and network equipment requiring compact, multi-layered module integration.
- Mobile devices and smartphones: Enabling smaller device profiles with enhanced functions through 3D stacking.
- Internet of Things (IoT): Supporting miniaturized, low power, and secure electronic modules through advanced embedding technologies.
- Consumer electronics: Including wearables and compact devices where space-saving and reliable module interconnectivity are critical.
- Electronic assembly technology: Assisting manufacturers and quality control teams in adopting consistent international methods for electrical connectivity assessment during stacking processes.
This standard enhances product reliability, reduces failures related to inter-module electrical connectivity, and facilitates cost-effective industrial adoption of stacking technology.
Related Standards
For comprehensive implementation and compliance, IEC 62878-2-602 references and complements other relevant standards such as:
- IEC 60194-2: Vocabulary for printed boards and electronic assembly technologies, providing terminology consistency.
- Other parts of the IEC 62878 series, which cover various guidelines for device embedding assembly technology.
- ISO/IEC directives for international standardization processes that guide the development and application of related standards across electronics manufacturing industries.
Keywords
Stacked electronic modules, inter-module electrical connectivity, device embedding assembly technology, four-terminal measurement, electrical connectivity evaluation, stacked module testing, electronic assembly standards, IEC 62878-2-602, 3D electronic module, daisy-chained interconnect, test specimen specification, electronic device miniaturization, Internet of Things electronics, high-performance computing modules, reliable electrical connections.
IEC 62878-2-602:2021 serves as a vital resource for electronics engineers and manufacturers committed to ensuring robust and reliable electrical connectivity within stacked electronic modules, supporting innovation and quality in next-generation electronic devices.