(JP10117008-A)      The solar battery element has positive and negative electrodes (16,18) connected to a p+ layer (14) and an n+ layer (12), respectively. The p+ and n+ layers are formed on the back side of a silicon substrate (10). The front side surface of silicon substrate is the light receiving surface (24) on which peripheral protrusions (28) are formed at the edges.    On the light receiving surface, one or more projections (26) for light dispersion are formed with a pyramidal shape base. The length of the base edge of projection part is made to 1/100-1/10 of the diameter of the condenser lens.    ADVANTAGE -   Prevents concentration of light. Reduces voltage drop due to high current density. Improves photoelectric conversion efficiency. Prevents rupture of battery element.    (US5961742-A)      The component Si support (10) has a front, light reception face (24) and a rear face with electrodes, with the light reception face carrying one or two or more protruding sections (26), each of pyramid- or frusto-pyramidal shape.    Preferably one side of the pyramid bottom region has a length of 1/100 to 1/10 of the collector lens diameter. Typically there is one protruding section in the middle of the light reception face, whose bottom region is 1/5 to 1/20 of the light reception face region. Alternatively there are two or more protruding sections located round central section of the light reception face.    USE -   For solar cell energy generating system.    ADVANTAGE -   Prevention excessive light concentration at one point without reduced focussing.    (JP3070489-B2)      The component Si support (10) has a front, light reception face (24) and a rear face with electrodes, with the light reception face carrying one or two or more protruding sections (26), each of pyramid- or frusto-pyramidal shape.    Preferably one side of the pyramid bottom region has a length of 1/100 to 1/10 of the collector lens diameter. Typically there is one protruding section in the middle of the light reception face, whose bottom region is 1/5 to 1/20 of the light reception face region. Alternatively there are two or more protruding sections located round central section of the light reception face.    USE -   For solar cell energy generating system.    ADVANTAGE -   Prevention excessive light concentration at one point without reduced focussing.