NOVELTY - The method for manufacturing a multifunction solar cell, comprises depositing a sequence of layers of semiconductor material on a first substrate for forming a multifunction solar cell, forming an ohmic contact layer (122) on the solar cell, electroplating a metallic contact layer (122a) over the ohmic contact layer, attaching a sapphire wafer to the metallic contact layer, and removing the first substrate. The solar cell is attached to a glass supporting member. The metallic contact layer is greater than 10 microns in thickness. The ohmic contact layer is 2000 Angstrom in thickness.    USE - The method is useful for manufacturing a solar cell, which is useful as the power conversion devices for on-board power systems e.g. a satellite power system.    ADVANTAGE - The method is capable of easily manufacturing produces commercially viable, energy efficient, multijunction solar cell with improved characteristics, reduced size and excellent power and energy conversion efficiency thus reducing the size, mass and cost of a satellite power system.    DETAILED DESCRIPTION - The method for manufacturing a multifunction solar cell, comprises depositing a sequence of layers of semiconductor material on a first substrate for forming a multifunction solar cell, forming an ohmic contact layer (122) on the solar cell, electroplating a metallic contact layer (122a) over the ohmic contact layer, attaching a sapphire wafer to the metallic contact layer, and removing the first substrate. The solar cell is attached to a glass supporting member. The metallic contact layer is greater than 10 microns in thickness. The ohmic contact layer is 2000 Angstrom in thickness. The grading inter-layer is composed of layers with monotonically increased lattice constant. The sequence of layers of semiconductor material is deposited by forming a first solar sub-cell having a first band gap on the substrate, forming a second solar sub-cell having a second band gap over the first sub-cell, forming a grading interlayer having a third band gap over the second sub-cell, forming a third solar sub-cell having a fourth band gap such that the third sub-cell is lattice mis-matched with respect to the second sub-cell. The second band gap is smaller than the first band gap. The third band gap is larger than the second band gap. The fourth band gap is smaller than the second band gap. The ohmic contact layer is evaporated. The strain of the metallic contact layer is adjusted to compensate for the strain in the sequence of layers to control the curvature of the thin wafer solar cell. An INDEPENDENT CLAIM is included for a solar cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross-sectional view of the solar cell.    Contact layer (105)    Ohmic contact layer (122)    Metallic contact layer (122a)    Adhesive layer (123)    Grid line. (501)