Most failures of precision hard and brittle components originate from stress concentration at edge regions rather than the substrate body itself. After dicing and slicing processes, wafers, ceramic substrates and piezoelectric crystals tend to produce edge chipping, micro notches and subsurface microcracks, forming stress concentration sources. These subsurface hidden defects are barely visible to the naked eye. During subsequent grinding, polishing, coating, high-temperature heat treatment and long-term service of devices, the microcracks will continue to propagate, inducing wafer cracking, substrate warpage and film peeling, which further cause batch failure of electronic components. The core function of edge grinding is to reconstruct the micro-morphology of workpiece edges and eliminate edge stress concentration sources.
The high-performance
Wafer Edge Grinder is not merely used for edge rounding, but focuses on the precise control of edge micro-states. Adopting a flexible micro material removal mechanism, it avoids secondary damage caused by rigid aggressive cutting and realizes controllable profile shaping of workpiece edges. While forming a uniformly transitional chamfer profile, it effectively removes the subsurface damage layer left by dicing processes, eliminates edge stress peaks and prevents new mechanical damage to the substrate during processing.
The high-precision positioning fixture ensures stable and consistent contact posture between workpiece edges and abrasives, achieving precise control of chamfer width and profile radian, and eliminating processing deviations such as over-grinding and insufficient edge chamfering. In mass continuous production, the dispersion of workpiece edge profiles is controlled within an extremely small range to ensure excellent batch consistency.
After edge grinding treatment, the edge stress of workpieces is released and the propagation path of inherent microcracks is blocked, providing reliable pre-process conditions for subsequent grinding, polishing and coating procedures. It effectively reduces the scrap rate caused by wafer cracking in subsequent processes and improves the service reliability of devices against mechanical impact and thermal cycling.
In the manufacturing process of semiconductors and optoelectronic ceramics, the Wafer Edge Grinder serves as a front-end damage suppression device. By controlling edge micro-quality, it reduces the hidden failure risks of precision devices at the upstream of the manufacturing process.
English
русский
한국어
Deutsch
español
italiano
العَرَبِيَّة