Patent Publication Number: US-2013248237-A1

Title: Printed circuit board

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a printed circuit board (PCB) and, particularly, to a PCB that prevents adjacent bonding pads becoming short circuited. 
     2. Description of Related Art 
     Many components on a printed circuit board (PCB) are mounted using surface mount technology (SMT). Through-hole components (such as inductance coils, high-power components, power modules and so on) need to be mounted on the PCB by wave soldering or manual soldering. During the wave soldering or manual soldering, molten solder may fuse two adjacent bonding pads together and result in a short circuit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       The components of the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawing, like reference numerals designate corresponding parts throughout. 
       The drawing is a partial schematic view of a PCB in accordance with an exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     The drawing is a partial schematic view of a PCB  1  in accordance with an exemplary embodiment. The PCB  1  includes at least one soldering area  10  where multi-pin through-hole components are to be soldered. The soldering area  10  includes multiple vias  11  allowing the pins of the through-hole components to pass through, and bonding pads  12  around the vias  11  arranged on the surface of the PCB  1  for soldering the through-hole components. A through hole  13  is arranged between every two adjacent bonding pads  12 . During soldering, if the molten solder overflows, it will flow into the through hole  13  rather than flowing to an adjacent bonding pad, thereby avoiding forming a short circuit between two bonding pads. And after soldering, because of the through holes  13 , it is easy for an operator to check and make sure there is no solder connecting two bonding pads. 
     As shown in the drawing, the PCB  1  is prepared to receive a four-pin through-hole component. There are four vias ( 11   a ,  11   b ,  11   c , and  11   d ) and four bonding pads ( 12   a ,  12   b ,  12   c ,  12   d ). A through hole  13   a  is arranged between bonding pads  12   a  and  12   b . A through hole  13   b  is arranged between bonding pads  12   b  and  12   c . A through hole  13   c  is arranged between bonding pads  12   c  and  12   d.    
     In the embodiment, the through-hole components are mounted on the PCB by wave soldering or manual soldering, and the shape of the through hole between each two adjacent bonding pads is rectangular or elliptic in cross-section, 
     Although the present disclosure has been specifically described on the basis of preferred embodiments, the disclosure is not to be construed as being limited thereto. Various changes or modifications may be made to the embodiment without departing from the scope and spirit of the disclosure.