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Printed Circuit Board Fabrication

IP.com Disclosure Number: IPCOM000095264D
Original Publication Date: 1965-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Johnson, AH: AUTHOR [+2]

Abstract

Electrical connections can be made to internal planes of a multilayer printed circuit board. This is without using plated through-holes.

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Printed Circuit Board Fabrication

Electrical connections can be made to internal planes of a multilayer printed circuit board. This is without using plated through-holes.

Assume that connector 1 is edge-mounted to printed circuit board 2 having internal ground plane 3. Pin 4 carried by connector 1 can be connected to plane 3 by drilling a hole through one side of board 2 down to plane 3. Then, the end of pin 4 is inserted into the hole and is soldered directly to plane 3.

To prevent drilling through plane 3, the drill forms part of an electrical circuit. This is completed when the drill hits plane 3, and stops the drill. Pin 5, also carried by connector 1, provides an electrical connection with a circuit defined by the external plane on the opposite side of board 2.

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