Browse Prior Art Database

Power Distribution on Flex Circuits in Mechanically Adaptable Packages

IP.com Disclosure Number: IPCOM000108327D
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 51K

Publishing Venue

IBM

Related People

Budman, M: AUTHOR [+3]

Abstract

To distribute power in low voltage, medium to high current application of flex circuitry in mechanically adaptable packages, usage of distributed voltage regulators on flex circuitry is proposed. This approach provides signals and power to mechanically adaptable package via a single distribution media without adding additional layers of flex or parallel power distribution (i.e., cables).

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Power Distribution on Flex Circuits in Mechanically Adaptable Packages

       To distribute power in low voltage, medium to high
current application of flex circuitry in mechanically adaptable
packages, usage of distributed voltage regulators on flex circuitry
is proposed.  This approach provides signals and power to
mechanically adaptable package via a single distribution media
without adding additional layers of flex or parallel power
distribution (i.e., cables).

      The use of flex circuitry solves the mechanical problem of
variable pitch, but does not solve the problem of distributing low
voltages at medium to high current.  Since resistance is inversely
proportional to cross sectional area of a conductor, it would require
a thick layer of copper in the flex circuit which adds rigidity, or
increased flex circuit width beyond what is needed to carry the
signals.

      Distributed voltage regulators (on-flex) at the load allow flex
circuits to be used in these types of medium to high current
applications.  The on-flex voltage regulator (DC/DC converter) allows
the designer to use a high voltage unregulated source to provide
power which only requires low current distribution.  The on-flex
regulator then converts the low current, high voltage source to a
high current, regulated low voltage supplied to the load.

      Referring to the figure, the variable spaced loads 1 are
positioned along the frame 2.  The signal wire traces 7 on flex 3
bring sig...