再補一個 Form Factors 對 microATX 的相關資料：

microATX EMC Design Suggestions Version 1.0
http://www.formfactors.org/develope...s%5Cmatxemc.pdf

(Page.10)

2.5 Chassis Considerations
The principle function of the chassis, with respect to EMC, is to contain the EMI generated within. This is accomplished by providing a tight enclosure. Metal plating, seams, and aperture sizes are important chassis features that affect EMI control.

2.5.1 Materials Considerations
(有提到材質選用，厚度等，詳細內容請參見原始 pdf)

2.5.2 Apertures
(內容請參見原始 pdf)