摘要:
A method of fabricating a differential doped solar cell is provided. The method comprises the steps of (a) providing a light doped semiconductor substrate; (b) forming a heavy doped layer having the same type of dopant used in step (a) on a front surface of the semiconductor substrate; and (c) forming an emitter layer having a different type of dopant used in step (a) on a surface of the heavy doped layer to constitute a p-n junction with the heavy doped layer.
摘要:
A method of fabricating a differential doped solar cell is provided. The method comprises the steps of (a) providing a light doped semiconductor substrate; (b) forming a heavy doped layer having the same type of dopant used in step (a) on a front surface of the semiconductor substrate; and (c) forming an emitter layer having a different type of dopant used in step (a) on a surface of the heavy doped layer to constitute a p-n junction with the heavy doped layer.
摘要:
A coin dispensing and storing device includes a body, coin collecting tubes, a left rotatable support, a pivotal plate and a right rotatable support. Coins are received in the coin collecting tubes. The left rotatable support is pivotally connected to one side of the body. The left rotatable support allows a portion of the coin collecting tubes to be disposed therein. The pivotal plate is pivotally connected to the other side of the body. The right rotatable support is connected to the pivotal plate. The right rotatable support allows the remaining portion of the coin collecting tubes to be disposed therein. The left and the right rotatable supports can be pivotally received in or rotated to the outside of the body. With this arrangement, the operation is labor-saving. Further, the force exerting on the respective rotatable supports can be distributed efficiently to reduce the generation of damage and deformation.
摘要:
An exemplary method for manufacturing printed circuit boards is provided. In the method, a copper clad substrate having a copper layer thereon is provided. A surface of the copper layer is roughened by applying an atmospheric pressure plasma thereto. A photoresist layer is formed on the roughened surface of the copper layer. The photoresist layer is exposed. The photoresist layer is developed to form a patterned photoresist layer, thereby exposing portions of the copper layer. The exposed portions of the copper layer exposed are removed so that the remaining portions of the copper layer form electrical traces. The patterned photoresist layer is removed.
摘要:
A method for smoothing a printed circuit board (PCB), comprising: providing a PCB having a first smooth outer surface and an opposite second outer surface, the second outer surface including a smooth region and a plurality of dimples; applying a liquid photoresist layer onto the second outer surface of the PCB to fill the dimples; solidifying the liquid photoresist in the dimples to obtain a solidified photoresist layer; polishing the solidified photoresist layer until a surface thereof being coplanar with the smooth region; and polishing the entire second outer surface until the solidified photoresist layer is removed, thereby obtaining a plain outer surface parallel to the first smooth outer surface.
摘要:
A method for plating a FPCB base board, comprising the steps of: providing a FPCB base board comprising a sprocket region; and placing an insulation shielding plate spatially opposite to the sprocket region of the FPCB base board to limit a thickness of a plating layer formed on the sprocket region of the FPCB base board.
摘要:
An electrostatic discharge (ESD) protection apparatus for integrated circuits is provided. The ESD protection apparatus includes an ESD protection device. The ESD protection device is disposed in a guard ring and includes a special ESD protection unit and an ESD protection unit. The special ESD protection unit is parallel to the ESD protection unit and is disposed on the edge of the ESD protection device. The special ESD protection unit includes at least a special channel area and a plurality of contact windows. The minimum spacing between the two contact windows at two sides of the special channel area in the special ESD protection unit is greater than the minimum spacing between the two contact windows at two sides of the channel area in the ESD protection unit.
摘要:
Disclosed is a banknote output control device, which includes an optical transmitter module controlled to emit light across the banknote delivery path, an optical receiver module controlled to detect light passing from the optical transmitter module across the banknote delivery path, and a control circuit, which continues the output of a banknote when the value of the detected signal from the optical receiver module is approximately equal to the predetermined reference value, or reverses the banknote delivering direction when the value of the detected signal from the optical receiver module differs from the predetermined reference value significantly.
摘要:
A coin dispensing and storing device includes a coin distributing body (10), coin collecting tubes (20), a left rotatable support (30), a pivotal plate (40) and a right rotatable support (50). Coins are received in the coin collecting tubes (20) respectively. The left rotatable support (30) is pivotally connected to one side of the coin distributing body (10). The left rotatable support (30) allows a portion of the coin collecting tubes (20) to be disposed therein. The pivotal plate (40) is pivotally connected to the other side of the coin distributing body (10). The right rotatable support (50) is connected to the pivotal plate (40). The right rotatable support (50) allows the remaining portion of the coin collecting tubes (20) to be disposed therein. The left rotatable support (30) and the right rotatable support (50) can be pivotally received in the coin distributing body (10) or rotated to the outside of the coin distributing body (10). With this arrangement, the operation is labor-saving. Further, the force exerting on the respective rotatable supports can be distributed efficiently to reduce the generation of damage and deformation.
摘要:
A flexible printed circuit board base film for flexible printed circuit boards includes a sheet of flexible polymer matrix and a number of carbon nanotube bundles embedded in the polymer matrix. Each of the nanotubes bundles are spaced apart from each other. The flexible polymer matrix includes a first surface and a second surface. Due to the high thermal conductivity of carbon nanotubes, heat can be efficiently conducted from the first surface to the second surface of the flexible printed circuit board base film. The present invention also provides a flexible laminate made from the flexible printed circuit board base film and a flexible printed circuit boards made from the flexible laminate.