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The present technique decreases the manufacturing cycle time and cost for printed circuit boards having one or more power planes by customizing power pickups.
English (United States)
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Power Plane Customizing without the use of Unique Artwork
The present technique decreases the manufacturing cycle time and cost for
printed circuit boards having one or more power planes by customizing power
To customize power pickups, a glass master that contains a repetitive
pattern, as shown in Fig. 1, with the donuts electrically connected by a printed
circuit from the plane to the donut land would be manufactured for each printed
circuit board size. This pattern would be exposed, developed, and etched on a
core blank and stocked at this level.
To customize this core for a unique part number, a device would be provided
that would utilize a data system or template that will selectively pulse/probe the
grid point to be customized. This customization would be accomplished by
burning out, with a fuse action, the printed circuit connecting the plane to the
donut land. Burning out the land leaves a voided X-Y point, as shown in Fig. 2,
whereas not burning leaves a power pickup. The data system device would
present the panel to be customized with a difference in electrical potential
between the plane proper and the donut land to be customized whereby the fuse
action will occur.
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