名複: footprints
以上來源於:《英漢大辭典》
n.
- the impression left by a foot or shoe on the ground.
- the impact on the environment of human activity in terms of pollution, damage to ecosystems, and the depletion of natural resources.
- the area in which a broadcast signal can be received.
- the area beneath an aircraft or a land vehicle which is affected by its noise or weight.
- Computing the space taken up on a surface by a piece of hardware.
以上來源於:《簡明牛津英語詞典》
單選題
The World ___ Fund is an international non-governmental organization founded in 1961, working in the field of preserving wild animals, and reducing humanity's footprint on the environment.
對答案
footprint是印刷電路板上針對表面安裝技術(SMT)元件接觸銲點的配置,或是通孔插裝技術的通孔配置,目的是讓電氣元件及積體電路可以固定在印刷電路板上,且可以和電路的其他部份相連接。電路板上的footprint需要和元件的引腳一致。
元件製造商一般會對一個產品生產許多和其他競品針腳兼容的型號,讓系統整合者方便更換零件,不需要修改印刷電路板上的footprints。這對系統整合者降低成本很有幫助,尤其是針腳很密集的球柵陣列封裝(BGA)元件,其中的銲點可能會連接到印刷電路板上的其他層。
許多元件製造商(像是德州儀器及CUI)也會提供其元件的footprint資料。footprint的來源也包括第三方廠商,例如SnapEDA。