Recognition mark provided next to the placement position for the object of placing IC components (mainly QFP and BGA) with high accuracy. This mark is also called Local Fiducial Mark.

• IC元件（主要是QFP与BGA）贴装对象贴装位置旁边标的一种识别标记，以提高精度。该标记也称为“局部基准标记”。