NOVELTY - A monolithic integrated miniature solar cell array comprises a substrate, a doped layer formed at two sides of the upper surface of the substrate, a solar cell functional layer formed on upper surface of the doped layer, a cap layer formed on upper surface of the solar cell functional layer, a lower insulated filling layer filled among doped layers, a metal shading layer formed above the insulated filling layer, an upper insulated filling cover covered on the lower insulated filling layer and the metal shading layer, and a metal electrode formed on the doped layer at one side.    USE - The monolithic integrated miniature solar cell array is useful for industrial and commercial applications.    DETAILED DESCRIPTION - A monolithic integrated miniature solar cell array comprises a substrate; a doped layer formed at two sides of the upper surface of the substrate; a solar cell functional layer formed on upper surface of the doped layer; a cap layer formed on upper surface of the solar cell functional layer, where the area of the cap layer is less than area of the solar cell functional layer, and it is aligned with one side end of the solar cell functional layer; a lower insulated filling layer filled among doped layers and covered at one end of the solar cell functional layer, one end of the cap layer, and part surface; a metal shading layer formed above the insulated filling layer, where its area is less than the area of the lower insulated filling layer; an upper insulated filling cover covered on the lower insulated filling layer and the metal shading layer; and a metal electrode formed on the doped layer at one side and covered on the upper insulating filling layer and on upper surface of most of the cap layer. An INDEPENDENT CLAIM is a method for preparing the monolithic integrated miniature solar cell array comprising providing a semi-insulated gallium arsenide (GaAs) substrate; growing a doped layer on the semi-insulated GaAs substrate by using the metal organic compound vapor deposition process or liquid extension growing technology; growing a back field layer, a basic area layer, an emission layer, and a window layer on the doped layer in turn to form a solar cell functional layer; growing a cap layer on the solar cell functional layer to form an extension sheet; using the photo-etching and wet corroding technology to etch a groove in middle of the extension sheet; etching one side of the extension sheet groove to the doped layer to form a stable surface; using the vulcanization method to passivate two sides of the groove, which is the side wall of the solar cell functional layer; removing the cap layer on the solar cell functional layer; growing the lower insulated filling layer, the metal shading layer, and the upper insulated filling layer in the groove to form a sandwich structure; filing the lower insulated filling layer to cover one end of the solar cell functional layer, one end of the cap layer, and the part surface; growing the metal shading layer above the lower insulated filling layer; where its area is less than the area of the lower insulated filling layer; and the upper insulated filling layer covers the lower insulated filling layer and the metal shading layer; growing a metal electrode on the table surface of the doped layer to cover the upper insulated filling layer and the upper surface of the most of the cap layer and to form a serial solar cell array; and using the photo-etching technology and the magnetic control sputtering technology to grow two output ends at two sides at one end of the serial solar cell array.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the monolithic integrated miniature solar cell array.