Browse Prior Art Database

Pluggable Card Connector Assembly

IP.com Disclosure Number: IPCOM000108455D
Original Publication Date: 1992-Jun-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 3 page(s) / 96K

Publishing Venue

IBM

Related People

Shinners, SR: AUTHOR [+2]

Abstract

Described herein is a book-type pluggable card assembly for card-on- board packages that uses a rigid-flex (R/F) printed circuit 1 soldered directly to a connector header 2, as illustrated in Figs. 1 and 2. An R/F card is a laminated structure of circuitized rigid and flexible sheets with plated thru-holes (PTHs) drilled and plated following the lamination process. Electronic devices 3 are soldered to the card PTHs. Flexible circuit innerplanes 4 with printed wiring extend beyond the hard card boundaries. Flex circuits act as extensions of the internal card circuitry: circuit lines run from hard card PTHs to the card exterior in a flexible substrate. Circuit lines in the flexible extensions terminate at PTHs 5 on the flex circuits for soldering to a connector header.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Pluggable Card Connector Assembly

       Described herein is a book-type pluggable card assembly
for card-on- board packages that uses a rigid-flex (R/F) printed
circuit 1 soldered directly to a connector header 2, as illustrated
in Figs. 1 and 2.  An R/F card is a laminated structure of
circuitized rigid and flexible sheets with plated thru-holes (PTHs)
drilled and plated following the lamination process.  Electronic
devices 3 are soldered to the card PTHs.  Flexible circuit
innerplanes 4 with printed wiring extend beyond the hard card
boundaries.  Flex circuits act as extensions of the internal card
circuitry:  circuit lines run from hard card PTHs to the card
exterior in a flexible substrate.  Circuit lines in the flexible
extensions terminate at PTHs 5 on the flex circuits for soldering to
a connector header.  Two flexes extend out of a card edge and are
spread apart to accept the tails of pins in a pinned header.  Pins 6
protrude from both faces of the header.  One end of a pin is prepared
metallurgically for soldering to a flex circuit PTH.  A pin's free
end is precious-metal plated for reliable electrical connection with
a connector contact. Soldering is completed by reflowing pin and flex
PTH.

      A card is mechanically attached, i.e., by rivets or screws 7,
to guide bars 8 that extend typically along two card edges and are
integral to the header.  Guide bars, shown cut away in Fig. 1,
provide guidance for sliding the assembly into a card cage.  Between
guide bars spans an integral or...