Stratus II is a AOI system model from Electronic Production Partners (EPP) for automatic inspection of ceramic hybrids, LTCCs, wet adhesives, glaze print, dielectrics, solar cell wafers and flex PCBs. According to the company, it is the only system, that can inspect screen printed and /or electroplated gold layers. The problem with the inspection of gold is its high degree of reflection. The patented illumination technology allows a very reliable inspection of the highly reflective gold layers. By using different wave lengths from the UV up to the far IR, and/or by using polarized light, a very good repeatability and accuracy can be achieved. The system can practically “see” where the copper layer ends and where the gold begins. The inspected materials or substrates can be PCBs, ceramics, LTCCs, etc. and are used in all kinds of applications like manufacturing of high power LEDs, automotive electronics, medical, aerospace and industrial electronics.
The AOI system is searching for all kinds of defects caused by missing or excess print or layers, print shifts, scratches, shrinking, contamination, unwanted particles, holes, layer lift-offs, discoloration, etc. The system can also inspect transparent materials like adhesives and over glaze. The inspection of a 4 ” x 4 ” substrate takes about 5 seconds and is totally independent of the structures that are on the inspected device. The substrate size is practically unlimited. The AOI systems can easily be integrated into any production line.
EPP Europe 448
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