Abstract: A photovoltaic metal roofing system includes a first corrugated sheet, a second corrugated sheet, a first solar panel and a second solar panel. The first corrugated sheet has a first bottom plate, a first bearing plate and a second bearing plate. The first bearing plate and the second bearing plate locate at two sides of the first bottom plate. The second corrugated sheet has a second bottom plate, a third bearing plate and a fourth bearing plate. The third bearing plate and the fourth bearing plate locate at two sides of the second bottom plate. The second bearing plate and the third bearing plate are bonded together and partially integrated to define a connecting structure. The first solar panel locates on the first bearing plate and the second bearing plate. The second solar panel locates on the third bearing plate and the fourth bearing plate.

Abstract: A solar module frame includes two first borders and two second borders. At least one first border includes a first segment and a second segment, where one end of the first segment is connected to one end of the second border, and one end of the second segment is connected to one end of the other second border. The solar module frame includes at least one connection component. One end of the connection component is connected to the other end of the first segment, and the other end of the connection component is connected to the other end of the second segment. Each of the first segment, the second segment, and the connection component includes an external wall, a support wall, a first clamping wall, and a second clamping wall. Each of the first segment and the second segment includes an internal wall.

Abstract: A solar module frame includes two first borders and two second borders. At least one first border includes a first segment and a second segment, where one end of the first segment is connected to one end of the second border, and one end of the second segment is connected to one end of the other second border. The solar module frame includes at least one connection component. One end of the connection component is connected to the other end of the first segment, and the other end of the connection component is connected to the other end of the second segment. Each of the first segment, the second segment, and the connection component includes an external wall, a support wall, a first clamping wall, and a second clamping wall. Each of the first segment and the second segment includes an internal wall.

Abstract: A solar cell module with a hermetic chamber in the cover plate is provided. The hermetic chamber is disposed on the non-cell region of the solar cell module to direct light toward the cell region through totally reflection. The hermetic chamber includes a V-shaped groove embedded in the cover plate of the solar cell module, and the V-shaped groove is sealed with a sealing layer so as to make the hermetic chamber as an empty space which does not allow unwanted substances get in or out.

Abstract: A method for preparing a recessed transistor structure comprises the steps of performing an implanting process to form a doped layer in a substrate, forming a plurality of gate-isolation blocks on the substrate, forming a plurality of first spacers on sidewalls of the gate-isolation blocks, removing a portion of the substrate not covered by the first spacers and the gate-isolation blocks to form a plurality of depressions in the substrate between the first spacers, forming a gate oxide layer on inner sidewalls of the depressions, and forming a gate structure on the gate oxide layer to complete the recessed transistor structure.