What Layer of Skin Does EMatrix Target?

A recent answer on RS said eMatrix disperses energy under the skin & is not absorbed by melanocytes. I'm confused about what UNDER THE SKIN means. eMatrix minimally targets about 5% of the epidermis where melanocytes are located. I'm assuming most of the energy targets the dermis to stimulate collagen - which is a similar concept to non-ablative lasers, correct? My main question is - What prevents the eMatrix energy from reaching the hypodermis/fat layer?