Abstract

Stresses in semiconductor silicon chips were measured by an X-ray stress measurement method that is applicable to microareas (60 µ m dia.) of single crystals. The measurement was conducted before and after silicon chip mounting on a substrate. Also measured were residual stresses in areas around bumps. As a result, about +30 to +40 MPa tensile stresses were determined at the corners of the rear side of a test piece silicon chip, which was fixed with resin, and about +70 to +80 MPa tensile stresses were found near the solder-bump formed surface of another test piece silicon chip.

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