The perfect method from a placement and fixation standpoint in assembly is for your designer to put these being a mirror image, in which equivalent packages are positioned immediately guiding one another (consider a RAM adhere). In the situation where packages are mismatched, the component arrangement may also be mismatched. https://12-layerthickcopperpowerp94826.humor-blog.com/30610282/the-fact-about-four-layer-inner-and-outer-layers-2oz-copper-thick-pcb-circuit-board-that-no-one-is-suggesting