A high density vertical surface mount package and thermal carrier therefor including a heat sink. Modifications may be made to the surgical drain to improve stabilization or immobilization in the proximity of the anatomical site to be monitored. A photo-resist layer is formed on the silicon nitride layer and then the photo-resist layer, the silicon nitride layer, the polysilicon layer, the tunneling oxide layer and the substrate are patterned to form a plurality of trenches in the substrate.