How to avoid the case where the pad does not match the component pin size

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One of the most crucial steps in processing PCBAs is soldering. A PCB pad is used to make electrical connections to every component on printed circuit boards. When it comes to deciding where components are soldered on the PCB, the pads are an extremely important component. The manufacturing quality of a PCB directly affects the size, shape, and placement of the pads on the board.

(1) In principle, the design of the surface mount pad must be done in two ways: the pin center is matched with the pad center, and the pad should be 0.05 mm or more larger than the pin periphery.

(2) For the arc-shaped surface end welding surface, the pad must be in contact with the welding end due to the influence of the arc.

(3) For similar package exclusion, in addition to the above requirements, the design of the external expansion pad can also be used. This method is mainly to use the surface tension of the tetragonal solder paste after melting to position, pull the component to the center position, so that the intermediate pad can be accurately aligned and soldered well.

The pads are crucial to the PCBA process because they directly impact the quality of the soldering of components on the circuit board, which in turn impacts the quality of electronic products. I hope you may gain more knowledge about pads in PCB and PCBA fabrication from this text. Furthermore, KSPCBA is a reputable PCBA provider that can ensure the quality of your soldering and pad. With eighteen years of experience as a one-stop shop, this Chinese manufacturer can handle a number of tasks, including PCB design, fabrication, prototype, procurement of components, PCB assembly, PCBA testing, packaging, and shipping, all of which will significantly reduce your time and expenses.