The CMS tracker upgrade for HL-LHC: sensors and electronics

At an instantaneous luminosity of 5 x 1034 cm^-2 s^-1, the high-luminosity phase of the Large Hadron Collider (HL-LHC) is expected to deliver a total of 3000 fb^-1 of collisions, hereby increasing the discovery potential of the LHC experiments significantly. To fully exploit this opportunity and to address the associated challenges CMS is preparing a detector upgrade plan. This talk will concentrate on the upgrade of the CMS tracker for the HL-LHC. The present status of the project will be summarized, including the future tracker layout, the design of module prototypes, the status of the front-end electronic components, studies of various silicon sensor materials and its capability to contribute to the level-1 trigger decision. (author)