Abstract:
Disclosed herein is a solder pad interface for a solder joint on a substrate. The solder pad interface includes a soldermask defined (SMD) interface between a solder pad (202) and the substrate, and a non-soldermask defined (NSMD) interface between the solder pad and the solder joint. The SMD interface can include a layer of insulating material (208) configured as an overlaid stencil with apertures through which the NSMD interface of the solder pad is substantially accessible. The SMD interface can include a soldermask (210) configured to cover an outer portion (212) of the solder pad. The NSMD interface includes a raised central portion (214) of the solder pad having a top. The layer of insulating material can be substantially flush with the top of the raised central portion. The raised central portion can provide the NSMD interface between the solder pad and the solder joint.
Abstract:
Die Erfindung betrifft eine Leiterplatte, insbesondere Keramikplatte, mit einer ersten Schicht (1) , wobei die erste Schicht eine Metallschicht ist und zur elektrisch leitenden Verbindung über eine Laserschweißung (4) mit einem Anschluss vorgesehen ist. Es ist eine bekannte Tatsache, dass bei Laserschweißungen eine genaue Kontrolle der Laserparameter innerhalb der erlaubten Toleranzen sehr schwierig ist. Als problematisch erweist sich insbesondere eine Laserschweißung mit zu hoher Energie aufgrund standardmäßiger Abweichung. Es wird eine Leiterplatte angegeben, die eine zweite Schicht (9, 11, 12, 20) mit mindestens einer Schutzfunktion zur Verhinderung schädlicher Einwirkungen der Laserschweißung (4; 14 bis 19) aufweist, da die zweite Schicht zur stoffflüssigen Verbindung zumindest mit dem Anschluss mittels der Laserschweißung vorgesehen ist. Zudem entstehen Vorteile bei Anschluss-Übersteiger-Kombinationen oder Anschlüssen mit einer Isolationsschicht (6).
Abstract:
A power transfer pad, having; an non-conductive (30) board having a top and a bottom plurality conductive substrates sections (32) disposed across the top of the non-conductive board (30); at least one conducting element disposed on each of the conductive substrate sections (32); a plurality of electrical contacts on the bottom the non-conductive board, wherein each of the electrical contacts on the bottom of the non-conductive board (30) are in electrical communication with one of the conductive substrate sections (32) on the top of non-conductive board (30).
Abstract:
A power transfer pad, having: a non-conductive board having a top and a bottom; a plurality of conductive substrate sections disposed across the top of the non-conductive board; at least one conducting element disposed on each of the conductive substrate sections; a plurality of electrical contacts on the bottom of the non-conductive board, wherein each of the electrical contacts on the bottom of the non-conductive board are in electrical communication with one of the conductive substrate sections on the top of the non-conductive board.
Abstract:
To achieve a large thickness of conductive metal-containing material in a feature of a product unit processed with a liquid-based etch process, the desired thickness of material is apportioned to the two opposing surfaces of a substrate to create a two-part feature. Conventional features are made by identically patterning two same-thickness metal-containing layers and electrically connecting the resulting patterned parts in any suitable manner. However, features may also be made that do not have identical parts on opposite sides of the substrate, the two parts being electrically connected but differing in thickness, in shape, or both. Moreover, having two metal-containing layers separated by an insulator is also useful for allowing different sections of the same feature or circuit to cross one another without shorting, or to overlap in whole or in part without shorting. A polymer substrate (1004), e.g. polyethlyene terepthalate, is covered on the top and bottom surfaces by a metal- containing layer, e.g. aluminium or copper foil, which are in turn covered by etch masks (1110, 1120, 1130, 1140, 1150, 1160, 1180), e.g. a resin formed by gravure printing or photoresist. The web is immersed in a bath or sprayed with an etchant, e.g. NaOH, to form the metal- containing web (1115, 1125, 1135, 1145, 1155, 1165, 1175, 1185).
Abstract:
Coplanar waveguides have a center signal line and a pair of ground lines on either side formed of a sputtered material such as gold (Au). Such waveguides are subject to what is known as the edge effect at high frequency operation causing currents to concentrate and flow along adjacent edges of the lines. Providing a thicker plated layer only on adjacent edges of the lines provide substantial performance improvements over sputtered lines alone while saving significant amount of Au, thus reducing costs.
Abstract:
A method and apparatus for applying ink, according to a soldermask pattern, to a printed circuit board having elevated pads defining pad edges, the method including flooding the printed circuit board with ink such that the ink advances to the pad edges and is stopped thereby and thereat, without climbing onto the elevated pads.