摘要:
The invention relates to a shield for circuit boards, and more particularly a shield, suitably manufactured from a one piece metal cover (1) and the corresponding manufacturing method. The shield comprises at least one shield portion (3) shaped from the cover (1) adapted to cover at least part of the circuit board. In a preferred embodiment, the cover has exterior walls (6) and a roof (5), wherein the shield portion comprises an interior shielding wall (3) shaped to depend from the roof (5). The shielding wall (3) may be shaped by cutting and bending material from the roof (5). The cover (1) may be made of metallized plastic or metal.
摘要:
A shield can for shielding electronic components on a PWB (printed wired board) in an electronic device. In order to compensate for any non-planarity of the PWB, the shield can is divided into sections that are linked together in a flexible manner.
摘要:
Methods for the production of a board (11) with printed circuit (12) shielded against interfering radiation and having electronic components (14) comprise the steps of positioning of the electronic components (14) on contact points (15) designed for them, and the application of a shield (20), comprising a preformed metallized plastic film (30) over the top of the electronic components (14) and in electrical contact with the earth (13) on the board (11) with printed circuit (12), and also fixing the electronic components (14) on the board (11) with printed circuit (12) by means of an electrically conducting fixing agent (16); and fixing of the shield (20) on the board (11) with printed circuit (12).
摘要:
An EMI and RFI shield mounting system (24) includes a compartmented EMI shield (21) constructed of a vacuum metallized thermoform (22) having upright hollow walls separating and surrounding the compartments (13). The shield (21) conforms to the interior of a housing (20) for electronic equipment (30), with the upright walls (29) overlying ridges formed in the interior of the housing (20). A compressible gasket (25) is placed between the ridges of the housing and the inner reaches of the hollow walls (31) of the shield (21). The free sides of the walls (29) of the shield (21) may be abutted against ground traces (46) on a printed circuit board (32) on which the shield (21) and housing (20) are placed. The gasket (25) urges the metallized free edges of the walls (20) of the shield (21) against the ground trace (46) of the printed circuit board to provide electrical conductivity between the printed circuit board and the shield (21). Dimples (60), tabs (52) or protruding punctures may be formed in the free sides of the walls (29) to ensure conductive contact with the ground trace (46).
摘要:
A shielding housing (1) cooperates with at least one conductor surrounding at least one component on a printed circuit board to electrically shield said at least one component. The shielding housing (1) comprises a shielding element (2) which carries a serrated, elastic shielding gasket (4), which is adapted to cooperate with said at least one conductor. The housing (1) is adapted to be pressed with its serrated gasket (4) against said conductor on the printed circuit board.
摘要:
A shielding housing (11) for electrically shielding at least one component on a printed circuit board (12), comprises a layer (14) of a non-shielding material having at least one cavity (15) for receiving said at least one component. An elastic gasket (16) is provided on the rim of said at least one cavity (15). A layer (17) of an electrically shielding material covers the gasket (16) as well as one or both surfaces of said layer (14) of a non-shielding material. In operation, the shielding housing (11) is pressed with its gasket (16) against a conductor (13) located on the printed circuit board (12) around said at least one component to be shielded.
摘要:
An electromagnetic interference shielding structure is disclosed. The electromagnetic interference shielding structure includes an insulating member covering at least one circuit element mounted on a printed circuit board (PCB), a shielding member covering the insulating member, and a heat dissipator having a surface adhering to the shielding member to transfer heat emitted from the at least one circuit element to a place where temperature is relatively low.
摘要:
A deflectable gasket assembly for EMI shielding and environmental sealing is described. The gasket assembly is formed from an electrically-conductive mesh sheet positioned between adjacent conductive surfaces. A gasket is provided at the outer boundaries of the mesh sheet for environmental protection. The edge of the gasket has a branched sealing element extending above and below the gasket assembly for contacting the adjacent surfaces. The branched sealing element is deformable and can be used on external aircraft electronic components.