Ipc-7095 Pdf ((free)) Access

IPC-7095: Design and Assembly Process Implementation for BGAs

Introduction

IPC-7095 is an industry standard covering the assembly, inspection, and reliability of surface mount technology (SMT) for printed circuit boards (PCBs). It provides criteria and best practices for soldering, component placement, and process control to ensure long-term performance of electronic assemblies.

The Ultimate Guide to IPC-7095 PDF: Design and Assembly Process Implementation for BGA

3.2 Void Positioning Rules

• Voids near the PCB pad (bottom) are worse than voids near the component side.
• Voids covering >10% of the pad interface require process investigation.
• Non-destructive evaluation: X-ray laminography or 2D X-ray with multiple angles.

4. Rework and Repair

One of the most valuable sections of IPC-7095 is the rework guideline. It outlines the methodology for: ipc-7095 pdf

• Removing a BGA without damaging the PCB pads.
• Cleaning the site (removing old solder).
• Re-balling a BGA (attaching new solder balls to a used component).
• Reflow profiles for rework stations (which differ from conveyor oven profiles).