The Intermediate Silicon Layers (ISL) detector is currently being built as
part of the CDF II detector upgrade project. The ISL detector will signific
antly improve tracking in the central region ana, together with the Silicon
Vertex detector, provide stand-alone 3D track information in the forward/b
ackward regions. In this article, we present the quality of the production
sensors manufactured by Hamamatsu Photonics, which account for roughly half
of the silicon sensors used in the ISL detector. (C) 2000 Published by Els
evier Science B.V. All rights reserved.