Soak Zone: 6 Rules in a Reflow Profile The soak zone is the flat band a reflow profile holds between the initial climb and the spike, usually somewhere between 150 C and 180 C for a lead-free paste. It is the part of the curve where the board stops gaining…

PCB Customer Complaint Audit: Checking the Practice Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB customer complaint audit from the perspective of a PCBA factory floor, covering…

Panel Warpage: 5 Causes Before the Reflow Oven Panel warpage is the loss of board flatness across a PCB array, and it is measured as the maximum distance between the panel and a flat reference. It matters long before the finished product, because a panel that is not flat does…

Carbon Treatment: 6 Steps to Restore a Plating Bath Carbon treatment is the standard way to remove organic contamination from a plating bath that has drifted away from the deposit quality it was made to produce. Powdered or granular carbon is added to the tank, allowed to adsorb the organic…

PCB Customer Complaint Cost: What It Adds Up To Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article…

AOI Lighting: 6 Setup Rules to Cut False Calls AOI lighting is the arrangement of light sources that illuminates a board for the inspection camera, and it is the part of the machine that decides what the software is allowed to see. A solder joint that is never lit correctly…

Pumice Scrubbing: 5 Rules for Brush and Slurry Pumice scrubbing is a mechanical surface preparation step that runs before lamination, before oxide treatment and before some coating operations. A slurry of fine pumice is fed onto rotating brushes that pass over the copper, removing oxide, handling soil and the residues…

PCB Customer Complaint Problems: When It Goes Wrong Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article explains…

PCB Customer Complaint Checklist: What to Check Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB customer complaint checklist gives you a practical advantage when you…

Exposure Energy Control: 5 Checks With a Step Wedge Exposure energy is the amount of light the photoresist actually receives, and it decides whether the pattern that leaves the developer matches the artwork on the film. Too little energy leaves resist at the bottom of the exposed area, so the…