Breakthrough of Micro USB Placement in Printed Circuit Board

Kent Lee,  Huoy Thyng Yow,  Oliver Hooi
Motorola Solutions


Design reuse is the approach used to improve hardware productivity and efficiency, thus shorter product time-to-market. Development team is always looking for opportunity to reuse some of the electrical and mechanical concept, ideas and design. Chassis as a major component of a radio is the good candidate for design reuse due to longer lead-time to design, test and qualify the most reliable chassis for a product. PCB component placement is divided into primary and secondary side. Primary side is the location of light components, whereas secondary side is for through hole and heavy components. Micro USB connector is categorized as heavy component with lead. As such, it is supposing to place at secondary side of printed circuit board (PCB). In this project, the chassis was reused and its design did not fit nor allow micro USB connector to be placed at the secondary side of PCB. This paper attempts to discuss and elaborate in details the approach and breakthrough idea of placing a heavy component (micro USB) at primary side of PCB, yet meeting PCB assembly and product reliability requirements.