Micro-fractures that break electrical connections.
: Specialized strain gauges with small sensitive grids (such as EF series from TML) are available for measuring strain on miniaturized PCBs and chips, with polyimide base materials and operating temperatures up to 300°C.
IPC-9704 distinguishes between two major stress events:
IPC also offers combination training packages with related standards such as IPC-9201/9202/9203 (surface insulation resistance testing) at discounted rates, providing comprehensive coverage of PCB reliability topics. ipc-9704 pdf
The strain measurement goal is to characterize all assembly steps involving mechanical loading. Data collected from these tests serve as benchmarks for future process improvements and corrective actions.
It is important to distinguish between the two major IPC/JEDEC strain standards:
IPC-9704 does not mandate a single, universal "pass/fail" number for all PCBs. Instead, it explains how to calculate custom strain limits based on variables such as: Micro-fractures that break electrical connections
The IPC-9704 standard includes several annexes that provide additional information and guidance on:
What (e.g., large BGA, ceramic capacitors) are you most concerned about protecting?
What specific (e.g., ICT, depanelization, assembly) are you trying to analyze? The strain measurement goal is to characterize all
For professionals seeking an , understanding the core requirements of the standard is critical for preventing brittle fractures in Ball Grid Array (BGA) components and ensuring long-term product reliability. Why IPC-9704 is Critical for Manufacturing
: The standard was revised to address the unique challenges of lead-free solder alloys, which tend to be more brittle than traditional lead-based solders
