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Pin in Stepped Hole (Connection of Module Contact to PC Board Circuitry)

IP.com Disclosure Number: IPCOM000103035D
Original Publication Date: 1990-May-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 35K

Publishing Venue

IBM

Related People

Bahri, K: AUTHOR [+3]

Abstract

Today's connectors are being mounted with pins through the PC board. This technology is limited because it depletes the PC board's wiring real-estate which eliminates any chance for increasing densities. Ideas such as surface mount would allow higher densities, but can only be used for small components with similar structural characteristics under highly controlled conditions. (Image Omitted)

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This is the abbreviated version, containing approximately 100% of the total text.

Pin in Stepped Hole (Connection of Module Contact to PC Board Circuitry)

      Today's connectors are being mounted with pins through the PC
board.  This technology is limited because it depletes the PC board's
wiring real-estate which eliminates any chance for increasing
densities.  Ideas such as surface mount would allow higher densities,
but can only be used for small components with similar structural
characteristics under highly controlled conditions.

                            (Image Omitted)

      This stepped hole concept uses the same size via holes which
would be required to electrically join the surface mount pads to
inner lying planes of the board, therefore achieving similar
densities.  The stepped hole will accept the modular pin (see the
figure) with the following advantages over the surface mount method:
      -    ease of assembly and inspection
      -    more tolerant of thermal excursions
      -    forgiving of board flatness variations
      -    stronger and more reliable than surface mount connection

      Disclosed anonymously.