NOVELTY - Method (M1) of fabricating miniature organic solar array involves patterning indium tin oxide on glass substrate; spin coating positive photoresist on substrate; soft baking substrate; exposing photoresist to UV light; hard baking substrate; etching indium tin oxide in HCl and HNO3 mixture; cleaning and placing the substrate in inert environment; spin coating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on substrate; spin coating active layer and removing excess poly-3-hexylthiophene:(6,6)-phenyl-C61-butyric acid methyl ester (P3HT:PCBM); and annealing solar array.    USE - For fabricating a miniature organic solar array (claimed) for application in DC power supplies for electrostatic microelectromechanical systems (MEMS) devices. The miniature solar arrays can be used in fabrication on flexible substrates such as plastics, fabrics, and rubbers.    ADVANTAGE - The method provides full isolation of series connected cells, and can be used in the fabrication of microarrays as small as 0.01 mm2. This miniature size of the solar array is ideal for powering MEMS devices and allows easy integration with on-chip devices. The method provides power source that is light-weight and environmentally friendly for small electronic devices, with flexibility and cost-effectiveness.    DETAILED DESCRIPTION - Method (M1) of fabricating a miniature organic solar array involves patterning indium tin oxide onto a glass substrate; spin coating positive photoresist onto glass substrate; soft baking the glass substrate; exposing photoresist to a pattern of UV light using a mask and mask aligner, mask making contact with photoresist which is used as a stencil for UV light; hard baking and developing glass substrate; etching indium tin oxide in a mixed solution of hydrochloric acid and nitric acid; cleaning and placing glass substrate in an inert environment of N2; spin coating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) onto glass substrate; spin coating an active layer of poly-3-hexylthiophene:(6,6)-phenyl-C61-butyric acid methyl ester (P3HT:PCBM); removing excess P3HT:PCBM; drying glass substrate; using a shadow mask to deposit an aluminum cathode by Thermal Vapor Deposition, shadow mask being aligned with glass substrate and acting as a stencil during deposition; heating aluminum with current and in vacuum; and annealing solar array.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart of the fabrication process of miniature solar cell array.