  High density superconductor-semiconductor-superconductor junctions have a
small induced superconducting gap due to the quasiparticle trajectories with a
large momentum parallel to the junction having a very long flight time. Because
a large induced gap protects Majorana modes, these long trajectories constrain
Majorana devices to a low electron density. We show that a zigzag-shaped
geometry eliminates these trajectories, allowing the robust creation of
Majorana states with both the induced gap $E_\textrm{gap}$ and the Majorana
size $\xi_\textrm{M}$ improved by more than an order of magnitude for realistic
parameters. In addition to the improved robustness of Majoranas, this new
zigzag geometry is insensitive to the geometric details and the device tuning.
