Negative vs. Positive Photoresist in PCB Manufacturing
Key Differences Explained In printed circuit board (PCB) manufacturing, photoresist selection plays a critical role in achieving accurate circuit patterns and long-term reliability. At XPtronics Inc., understanding the differences between negativeand positive photoresist helps us choose the right process for each application, ensuring consistent, high-quality results. What Is Photoresist? Photoresist is a light-sensitive material applied to a PCB surface. […]
Pad Cratering in PCB Assemblies
PCB Failure Modes, Reliability & Solutions — An XPtronics Inc. Perspective Pad cratering is a subtle yet serious PCB failure mode where cracking occurs in the laminate beneath a copper pad, separating it from the surrounding resin. Unlike visible defects such as lifted pads or fractured solder joints, pad cratering often remains hidden—leading to intermittent or […]