A large scale prototype for an SiW electromagnetic calorimeter for the ILC—EUDET module

The CALICE Collaboration is preparing large scale prototypes for highly granular calorimeters for detectors to be operated at the International Linear Collider, ILC. During the year 2009/2010 a prototype of an SiW electromagnetic calorimeter will be assembled which in terms of dimensions and layout meets already most of the requirements given by the ILC Physics Program and hence the detector design. In particular the Very Front End electronics will have to fit within alveolar layers with less than 1 cm in height. In this contribution the design of the prototype is presented and the steps towards its realisation will be presented.