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Browse Prior Art Database

Circuit Board Interconnection Method

IP.com Disclosure Number: IPCOM000044101D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Hall, DJ: AUTHOR [+3]

Abstract

A large circuit board uses a plated through hole (PTH) as an interconnection between multiple internal signal planes and a shallow blind hole connector that attaches to a plug-in module. The PTH and the shallow blind hole connector are connected by a bridge or surface circuit line that can be severed in the event that the internal circuitry fails and has to be isolated. The surface of the board is covered with a special shrinking coating (Fig. 1). A drilled through hole 2 and a shallow blind hole 3 are then drilled. These two holes 2, 3 are positioned such that when the coating 1 shrinks it will break, resulting in a surface pattern 4 (Fig. 2) that will create a land when the pattern is filled in during the additive plating process. Next, a connector 5 is attached to the blind hole 3 (Fig. 3).

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Circuit Board Interconnection Method

A large circuit board uses a plated through hole (PTH) as an interconnection between multiple internal signal planes and a shallow blind hole connector that attaches to a plug-in module. The PTH and the shallow blind hole connector are connected by a bridge or surface circuit line that can be severed in the event that the internal circuitry fails and has to be isolated. The surface of the board is covered with a special shrinking coating (Fig. 1). A drilled through hole 2 and a shallow blind hole 3 are then drilled. These two holes 2, 3 are positioned such that when the coating 1 shrinks it will break, resulting in a surface pattern 4 (Fig.
2) that will create a land when the pattern is filled in during the additive plating process. Next, a connector 5 is attached to the blind hole 3 (Fig. 3). The internal circuitry 7 is connected to the through hole 2. A bridge 9 between the two holes 2, 3 provides the connection between the connector 5 and the internal circuitry 7. This bridge 9 can be severed to disconnect and rewire the connector with external wires. Alternately, an improved connector is provided. In addition to normal functions a projection 10 is used (Fig. 4). Two holes 2, 3 are drilled in the above manner with the exception that no surface interconnection is established. When the connector 5 is attached, the projection 10 bridges the two holes and provides the continuity between connector 5 and internal circuitry 7. To...