  The Belle II detector at the SuperKEKB accelerator has a level 1 trigger
implemented in field-programmable gate arrays. Due to the high luminosity of
the beam, a trigger that effectively rejects beam induced background is
required. A three dimensional tracking algorithm for the level 1 trigger that
uses the Belle II central drift chamber detector response is being developed to
reduce the recorded beam background while having a high efficiency for physics
of interest. In this paper, we describe the three dimensional track trigger
that finds and fits track parameters which we developed.
