Exposure to skin layer permeability, diffusion conductivity electrodes. Frontal exposure is similar to Fishbone to get the most exposure area. The rear electrode section is full of metal surfaces.
Surface light diffusion layers have a conductance electrodes on the front light will look like herringbone to get exposure to the space. The electrodes on the back A full metal surfaces
The light diffusion layer surface is absorbed with the electric conduction electrode in front of that light will resemble the bones to get the light receiving area most. The rear electrode is full metal electrode surface.