Development Technology of Manufactures the Ceramic PCBs for Preshower Detector of the CMS Experiment

In the framework of the development of the CMS preshower, the Yerevan group has put emphasis on the design and prototyping of a Printed Circuit Board (PCB) on a ceramic substrate. After an initial tuning phase, the quality of the product (the adherence of metallic pastes, the contrast and resistivity of the metallic lines and the precision of the mechanical cutting) has become satisfactory. The ceramic supports produced in Yerevan by the Yerevan Physics Institute in collaboration with the MARS factory and the Yerevan Telecommunication Research Institute are currently used for preshower prototypes. This report describes in detail the R&D on the technology required to manufacture these ceramic supports for large-scale production (4500 pieces).