]. T. Behnke, With a strong emphasize on the engineering aspects the construction and exploitation of the prototype will be followed by a considerable physics program too. 13 ACKNOWLEDGEMENT This work is supported by the Commission of the European Communities under the 6th Framework ProgrammeStructuring the European Research Area", contract number RII3-026126. 14 REFERENCES [1] The CALICE Collaboration Design and Electronics Commissioning of a SiW Electromagnetic Calorimeter for the International Linear ColliderDesign and Fabrication of moulds for the EUDET ModuleSemiconductor sensors for the CALICE SiW EMC and study of the cross-talk between guard rings and pixels in the CALICE SiW prototype, Reference Design Report Proceedings of the 13th International Conference on Calorimetry in High Energy Physics to be published in Journal of Physics: Conference Series. [7] M. Goodrick, " ECAL slab interconnection " Talk given at the CALICE Collaboration Meeting, p.7, 2007.