IPC-9242 - Standard Only

This document describes the methods used to evaluate and measure internally observable characteristics as referenced in IPC-A-600. The purpose of this document is to demonstrate methods and not give acceptability criteria. Microsection evaluation is performed after the printed board coupons are prepared in accordance with IPC-TM-650 Method 2.1.1. Evaluation is performed on the visible surface of the polished microsection. This technique can be used for in-process checks but may not be applicable for final acceptance as referenced in the performance specifications.