Soldering interconnects for selective line coupling
AssigneeInternational Business Machines Corporation
InventorsAnthony J. Parla, Howard F. Tepper
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AssigneeInternational Business Machines Corporation
InventorsAnthony J. Parla, Howard F. Tepper
Estimating the term…
A structure and method for selectively forming interconnections between the interconnect lines of a printed circuit board. At the same time solder is deposited through a solder application mask to bond the modules to the board, solder is also deposited on pad interconnect structures between the interconnect lines. Thus, line interconnections can be formed at minimal additional cost, reducing the number of different boards needed to mount different sets of modules or alternate component or circuit configurations. In a preferred embodiment, the pads comprise an arcuate member and an elongated member extending within the arc described by the arcuate member. By optimizing the spacing between the members, the total area of the members, and the volume of the solder, a highly reliable solder fillet interconnection can be formed.
A structure for electrically coupling two interconnect lines formed on an insulative substrate to one another, comprising a first conductive pad member connected to one of the two interconnect lines, a second conductive pad member coupled to the other of the two interconnect lines, said first and second conductive pad members being comprised of copper and spaced from one another by a portion of the insulative substrate having a width of approximately 0.25 mm to both prevent spiking and promote solder bridging between said first and second conductive pad members, said first and second conductive pad members defining a total solder wetting space of a given area, and a solder fillet formed on said total solder wetting space, said solder fillet having sidewalls that form a dihedral angle of greater than 75.degree. with respect to upper surfaces of said first and second conductive pad members, said solder fillet bridging said portion of said insulative material between said first and second conductive pad members.
A structure for selectively coupling adjacent interconnect lines disposed on a printed circuit board to one another, comprising:
Dependencies are inferred from the claim text.