Abstract:
An electrical connector 1 has a housing (2) with a base (3) for mounting on a printed circuit board (5), projecting mounting posts (6) extend from the base, a conductive outer shell (22) and a dielectric body (23) surrounded by the housing (2), a first conductive contact (25) has a first contact portion (48) projecting from the housing (2) for insertion into a corresponding aperture (55) of a printed circuit board (5), a second contact portion (33) projecting from the housing (2) for insertion into a corresponding aperture (7) of a printed circuit board (5), and each contact portion (33,48) has a taper (50) toward the free end and with an apex (51) of the taper (50) that intersects a longitudinal edge (52) of the corresponding contact portion (33,48) and is aligned with a center line (54) of a corresponding aperture (55) of a printed circuit board (5).
Abstract:
The invention relates to a method for making coaxial conductor interconnection boards including, on the upper side of the board, signal conductors surrounded by a dielectric and by a conductive shield. To prevent shorting of the signal conductors with the shield, the conductors are step-stripped and the unshielded conductor end with the dielectric exposed is inserted in drilled, non-metallized holes. The completely exposed signal conductor extends to the lower side of the board and is connected conductively to terminals pads, while the shields on the upper side are connected by a conductive layer which is connected to the ground plane.
Abstract:
An electrical connector 1 has a housing (2) with a base (3) for mounting on a printed circuit board (5), projecting mounting posts (6) extend from the base, a conductive outer shell (22) and a dielectric body (23) surrounded by the housing (2), a first conductive contact (25) has a first contact portion (48) projecting from the housing (2) for insertion into a corresponding aperture (55) of a printed circuit board (5), a second contact portion (33) projecting from the housing (2) for insertion into a corresponding aperture (7) of a printed circuit board (5), and each contact portion (33,48) has a taper (50) toward the free end and with an apex (51) of the taper (50) that intersects a longitudinal edge (52) of the corresponding contact portion (33,48) and is aligned with a center line (54) of a corresponding aperture (55) of a printed circuit board (5).
Abstract:
Die Erfindung betrifft eine mehrlagige Leiterplatte in Multilayer- oder Stapeltechnik mit mehreren übereinander liegenden Lagen, bei der zumindest ein Teil der Innenlagen mit als Leiterbahnen ausgebildeten und im Abstand zueinander angeordneten Signalleitungen versehen ist. Damit die Signalleitungen sowohl auf den beiden Außenlagen, als auch Innenlagen mit gleichen übertragungstechnischen Eigenschaften aufgebracht werden können, sieht die Erfindung vor, daß die den Innenlagen mit Leiterbahnen benachbarten Innenlagen im Bereich dieser Leiterbahnen so ausgespart sind, daß zumindest die zugekehrten Oberseiten dieser Leiterbahnen freiliegen.
Abstract:
An impedance matching stripline transition for microwave signals which are conducted from a stripline circuit on one laminate (2) to another laminate (4) through a number of intermediate laminates (3). The connection between an incoming stripline circuit (21) on one laminate (2) to the outgoing stripline circuit (41) on the other laminate is performed as a short coaxial line. The outer conductor of the coaxial line is formed by a number of through-plated holes (12, 13, 23, 33, 43) in horseshoe form around a central conductor of through-plated holes (24, 34). The outer conductor is connected with the earth plane (31, 11, 45) of the laminates. They serve simultaneously as suppressor of not desired modes in the microwave signals which is supplied to the transition via the conductor (21).
Abstract:
Provided are coaxial waveguide microstructures. The microstructures include a substrate and a coaxial waveguide disposed above the substrate. The coaxial waveguide includes: a center conductor; an outer conductor including one or more walls, spaced apart from and disposed around the center conductor; one or more dielectric support members for supporting the center conductor in contact with the center conductor and enclosed within the outer conductor; and a core volume between the center conductor and the outer conductor, wherein the core volume is under vacuum or in a gas state. Also provided are methods of forming coaxial waveguide microstructures by a sequential build process and hermetic packages which include a coaxial waveguide microstructure.
Abstract:
A secure circuit board assembly (10) is provided. The secure circuit board assembly (10) comprises: a control board (12) including a cryptographic processor (30); a spacer portion (14) mounted on the control board (12); and a lid (16) mounted on the spacer portion (14). The control board (12), the spacer portion (14), and the lid (16) collectively provide a secure enclosed chamber in which the cryptographic processor (30) is mounted. The spacer portion (14) provides protection against side-on attacks against the cryptographic processor (30).
Abstract:
A multilayer printed circuit board (100) comprising a first and a second conductive layer and an interconnection structure. The conductive layers have respective conductive traces formed thereon terminating at respective via pads (120). The interconnection structure comprises a centre signal conductor via (130) and a plurality of ground vias (132, 134, 136, 138). The centre signal conductor via is connected to the conductive traces propagating electrical signals there between. The multilayer circuit board further comprises a grounded metal layer (150). The grounded metal layer has a ground pullback section (140) cut away in a region surrounding the signal conductor via. The grounded metal layer comprises first and second ground extension sections protruding into the cut away ground pullback section. The first and second ground extension sections correspond to sections (118) of the conductive traces not having the grounded metal layer underneath and above, respectively.
Abstract:
Disclosed is a manufacturing method of metal structure in multi-layer substrate and structure thereof. The manufacturing method of the present invention comprises following steps: coating at least one photoresist layer on a surface of a dielectric layer, and then exposing the photoresist dielectric layer to define a predetermined position of the metal structure; therefore, removing the photoresist layer at the predetermined position and forming the metal structure at the predetermined position before forming at least one top-cover metal layer on a surface of the metal structure. The present invention can form a cover metal layer covering over the top surface and the two side surfaces, even the under surface of the metal structure, by one single photomask. Moreover, a finer metal structure with higher reliability can be manufactured. Furthermore, a metal structure can be used as a coaxial structure is also realized.
Abstract:
A secure circuit board assembly (10) is provided. The secure circuit board assembly (10) comprises: a control board (12) including a cryptographic processor (30); a spacer portion (14) mounted on the control board (12); and a lid (16) mounted on the spacer portion (14). The control board (12), the spacer portion (14), and the lid (16) collectively provide a secure enclosed chamber in which the cryptographic processor (30) is mounted. The spacer portion (14) provides protection against side-on attacks against the cryptographic processor (30).