Ipc-9704 Pdf ((better))
Test fixtures pressing down on the board.
While IPC-9704 provides the how-to for measurement, it does not state a single universal "pass/fail" number. Instead, it offers a framework for determining limits based on: ipc-9704 pdf
IPC-9704 is a standard published by the Institute for Printed Circuits (IPC) that provides guidelines for the design, manufacture, and inspection of high-reliability printed circuit boards (PCBs) for automotive and other high-performance applications. The standard is available in PDF format, which can be easily accessed and shared. Test fixtures pressing down on the board
The Complete Guide to IPC-9704: Understanding Printed Board Strain Gage Testing ipc-9704 pdf