摘要:
An electrostatic RF absorbant circuit carrier assembly (200) is described as having a plastic support structure (100) which consists of an integrally fashioned base (180) and surrounding sidewalls (170) which together form an internal cavity (185). A plurality of conductor paths (125,165) are disposed within the cavity (185). The assembly (200) is completed by a polymeric cover (110) having a surface integrally fashioned to comprise wall members (145) for making contact with conductive paths (165) within the cavity (185). In order to facilitate RF isolation and electrostatic dissipation, the cover (110) is layered with a surface material comprising:a thermosetting matrix system;a non-conductive RF absorbing filler comprising 25 to 87 percent by weight loading of the thermosetting matrix system; anda conductive filler comprising 1 to 4 percent by weight loading of the thermosetting matrix system and the RF absorbing filler.
摘要:
An electrostatic RF absorbant circuit carrier assembly production method including the steps of forming a polymeric support structure having a base and surrounding walls which form an internal cavity from plastic, disposing a plurality of conductor paths within the cavity, forming a polymeric cover having wall members integrally fashioned into a surface thereof, for making contact with conductor paths within the cavity, depositing a layer of surface material on the cover and the cover wall members, said surface material comprising:a thermosetting binder,a non-conductive RF absorbing filler comprising 25 to 87 percent by weight loading of the binder, such that the surface material absorbs RF energy within a range of 1-60 GHz, anda conductive filler comprising 1 to 4 percent by weight loading of the binder and the RF absorbing filler, such that the surface material has a surface resistivity of 10.sup.5 -10.sup.12 ohms/square, and fixing the polymeric cover to the polymeric support structure to cover the cavity and provide said contact between the wall members and the conductive paths, thereby forming a circuit carrier assembly.
摘要:
A flash free, compression molded object which includes an insert and is formed using only one mold plate is disclosed. Molding compound is trapped in a mold cavity between the insert and mold plate. An extrusion vent allows excess molding compound and curing gases to escape from the mold cavity. Systems for forming a pin hole within the molded object and removing the molded object from the mold plate are also disclosed.
摘要:
An electronic component has a body (11) that is formed from a mold compound that includes a thermoplastic material (31), a first filler (32) comprised of an electrically insulative material wherein the first filler (32) is more thermally conductive than the thermoplastic material (31), and a second filler (33) comprised of an electrically conductive material wherein the second filler (33) is more thermally conductive than the thermoplastic material (31).