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Solderless Process for Producing a Planar Contact Array On a Circuit Board

IP.com Disclosure Number: IPCOM000120993D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 76K

Publishing Venue

IBM

Related People

Baumberger, JG: AUTHOR [+2]

Abstract

Disclosed is a solderless method of connecting an array of contacts to circuit board wiring by an assembly process which positions the contacts in a plane with sufficient accuracy that the contacts mate reliably with lands on flexible circuitry.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 72% of the total text.

Solderless Process for Producing a Planar Contact Array On a Circuit Board

      Disclosed is a solderless method of connecting an array
of contacts to circuit board wiring by an assembly process which
positions the contacts in a plane with sufficient accuracy that the
contacts mate reliably with lands on flexible circuitry.

      Referring to the Fig. 1, a flat tool 1 presses on contacts 2
formed on one end of each oversize compliant pin 3 in an array,
forcing the pins into plated through holes (PTHs) 4 connecting
conductive lines in planes 5 to form circuits within board 6.  The
board is supported by plate 7 during the pin pressing operation.

      When the pin pressing tool stops its downward motion,
optionally controlled by tool projections 8 stopping against the
surface of board 6, the contacts on adjacent pins are positioned in a
nearly perfect plane suitable for connection with a flexible circuit.

      When pins 3 are sufficiently short compared to the thickness of
board 6, two such pins 9 and 10 may be assembled into each PTH of
an array, producing a plane array of contacts on both sides of board
6 which may be connected to flexible circuits.

      Various shapes of compliant pins may be used.  Examples are
shown in Figs. 2a, 2b, and 2c.

      Also, various shapes and spacing of contacts may be used on the
pin ends to mate with the lands on a flexible circuit.  Some examples
of contact geometry on the end of the tubular type of pin i...