Imagineering, Inc. | https://www.pcbnet.com/production-free-prototype/
. We handle the whole process including ordering the components, PCB manufacturing, PCB assembly, testing and final shipment. We are capable of assembling BGA, Micro-BGA, QFN and other leadless package parts
| http://etasmt.com/te_news_bulletin/2019-06-21/7161.chtml
. It is a surface-mounting component (SMC/SMD, Chinese called chip component) that is packaged in a matrix of leadless or short leads or balls, mounted on the surface of a Printed Circuit Board (PCB
