US 5,333,100 A · Data card perimeter shield

Abstract

A data card is provided which has an electrically conductive rail (70, 72 FIG. 2 ) extending along its opposite sides and part of its rear, and connected to the ground plane (60) of a circuit board (46) of the card, to provide EMI (electromagnetic interference) shielding along the perimeter of the card. The rail has top and bottom edge portions (94, 96 FIG. 6 ) that are each bent into a U shape to extend around top and bottom ridges at the side of the card body to lock the rail in place. One edge portion includes a projecting tab (110) which is bent to extend inwardly and engage the ground plane (60) of the circuit board. The molded card body has a through hole (114) in its side portion, and the tab can extend into that hole before extending inwardly to the circuit board ground plane.

Claims10

Dependent claims

A data card comprising:

a frame which includes a body molded of plastic material that has a conductivity at least about two orders of magnitude less than that of copper, said body having opposite side portions, opposite end portions, and top and bottom portions, said frame also having electrically conductive top and bottom covers;
a circuit board assembly mounted on said body and lying in said frame, said assembly including a board having a ground plane;
at least one electrically conductive elongated rail which lies over more than half of the area of at least a first of said body sides, said rail being formed of sheet metal and having top and bottom portions that are each bent around at least part of a corresponding one of said body side portions to attach to said body, said rail being electrically connected to said ground plane of said circuit board and to said top and bottom covers.

A data card which includes a frame having a molded plastic body with a top and a bottom, opposite sides, and forward and rearward ends, said frame also having electrically conductive top and bottom covers lying respectively on said top and bottom of said body, said card also including a circuit board assembly which lies in said frame and which includes a board having a ground plane and a plurality of circuit components mounted on said board, wherein said board has top and bottom opposite faces and a peripheral portion and said ground plane lies on at least one of said board faces at said peripheral portion, characterized by:

at least one electrically conductive rail formed of sheet metal and extending along at least one of said sides of said body, said rail extending along more than half the height and along more than half the length of said one body side to cover more than half of the area of said one side, and said rail being electrically connected to said board ground plane;
said body has a support wall for supporting said top face of said board peripheral portion, and said body has a sideward locating wall extending down from said support wall and surrounding said board;
said rail has top and bottom rail edge portions and one of said rail edge portion includes a projecting tab that extends to a location between said support wall and said board peripheral portion and which engages said ground plane thereat.

Dependencies are inferred from the claim text.

Data card perimeter shield

Life of this patent

Data card perimeter shield

Life of this patent

Abstract

Claims10