NOVELTY - Forming an electrical contact pattern on a solar cell (100), comprises: (a) forming a pre-form of the electrical contact pattern on a top surface of the solar cell; (b) thermosetting the pre-form contact pattern having a MERCK ISISHAPE (RTM: Semi-molten etching paste) disposed on it at 390 degrees C; and (c) subjecting the solar cell to metallization process for deposition of metal on the etched contact pattern.    USE - The method is useful for forming the electrical contact pattern on the solar cell.    ADVANTAGE - The method: achieves the controlling of finger width of electrical contact pattern; reduces the requirement of larger surface areas on the top of the solar cell, thus increasing the overall efficiency of the solar cell; reduces the problem of recombination for charge carriers moving within the solar cell; significantly reduces the exposing of the solar cell to higher temperatures; utilizes the etching paste, that avoids the drawback of porosity of the deposited metal; and reduces the number of steps and time required for etching and to deposit metal on the solar cell.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a heating device connected to a temperature control unit and capable of forming a contact pattern on a solar cell (when contacted and operated with it), comprising: a conductive base portion having many holes; a first heating member connected to one of the holes for providing necessary heating effect to the heating device; a sensor disposed within other holes for sensing temperature of the heating device and based on the sensed temperature sending signal to the temperature control unit; and a heating surface protruding outwardly from the base portion and having a shape similar to that of the electrical contact pattern.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the solar cell.    Solar cell (100)    N-Type semiconductor (102)    P-Type semiconductor (104)    Insulating layer (106)    Bottom surface of the P-type semiconductor (108)