Snap-on lid for computer chip tray

A lid for snap engaging a tray holding electronic components, said tray including sidewall notches used with automatic assembly equipment, said lid comprising:

• a substantially planar panel with two opposed longer ends and two opposed shorter ends in a rectangular configuration, said panel further including reinforcing ribs;
• a downwardly extending skirt around a periphery of said panel, including an outwardly extending tongue along at least a portion of a lower edge of said downwardly extending skirt, said downwardly extending skirt including notches along a lower edge directly below said longer ends of said panel, to along with corresponding notches on said tray, and an inwardly extending ridge formed only on an inner surface on said downwardly extending skirt directly below at least one of said two opposed shorter ends of said panel such that said ridge is absent from said downwardly extending skirt directly below said two opposed longer ends of said panel.