We investigate an effective scalable grooved two-dimensional (2D) ion chip design. Grooves are cut between each two parallel radio frequency (RF) electrodes to decrease the laser scattering from ion chip surface, to easily open laser paths to control and to observe the strings of trapped ions. The control of ions has been improved by seperating direct current (DC) electrodes and RF electrodes. The potential distributions are calculated by using the finite element analysis method in order to verify the feasibility of our design. The results show that a scalable ion trap array still can be generated. Thus, this architecture provides a novel grooved 2D planar ion chip design and the arrays of trapped ions can be used in large-scale quantum information processing.