Destructive Coupon Microsection Preparation and Optical Feature Extraction
Precision destructive microsection preparation and calibrated optical extraction establish compliance for barrel plating, wrap copper, and internal layer interfaces.
Diamond Suspension
Abrasive Medium
An abrasive fluid containing precisely graded synthetic diamond particles performs rapid material removal during metallographic preparation of printed circuit board cross-sections. Using a diamond suspension ensures consistent cutting action on both hard glass fibers and soft copper layers.
Material Removal
The carrier fluid contains lubricants and surfactants that disperse the abrasive particles evenly across the polishing cloth, which prevents agglomeration and uneven scratching. Different particle sizes, typically ranging from nine micrometers down to one micrometer, are applied in sequential stages to reduce surface roughness. Industrial laboratories use these products with automated polishing heads to control force and rotational speed, which guarantees repeatable specimen quality.
The high hardness of the synthetic grit keeps the abrasive edges sharp for extended periods, which lowers overall fluid consumption.
Defect Prevention
Preserving the flat profile of the plated through-holes depends on the uniform cutting action of the diamonds to avoid relief effects between materials of different hardness. If the abrasive action is non-uniform, soft copper layers will erode faster than the surrounding glass-reinforced epoxy laminate. This creates a stepped boundary that prevents the inspector from focusing on both materials at the same time, which renders thickness measurements inaccurate.
Regular application of a compatible lubricant during the cycle maintains a stable fluid film and washes away loose metal debris.