Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – With provision to conduct electricity from panel circuit to...
Reexamination Certificate
2000-06-14
2001-01-09
Abrams, Neil (Department: 2839)
Electrical connectors
Preformed panel circuit arrangement, e.g., pcb, icm, dip,...
With provision to conduct electricity from panel circuit to...
Reexamination Certificate
active
06171114
ABSTRACT:
TECHNICAL FIELD
This invention relates in general to electrical interconnections, and more specifically, to a system for providing a removable, high density electrical interconnect.
BACKGROUND
Miniaturization and decreasing feature size is a fact of life in the electronics industry. The relentless demand for reduced size continues to drive every facet of the packaging business. However, advances in board-to-board interconnections and board-to-flex interconnections have not kept pace with the advances in the semiconductor industry, and are lagging behind the race for higher and higher interconnect densities. Interconnect system manufacturers have been forced to decrease the pitch and size of leads, thus compromising manufacturability and reliability. Consequently, input/output (I/O) counts for zero-insertion force (ZIF) and low-insertion force (LIF) connectors have come to a standstill, and are plateaued around 50 I/O. These types of connectors provide electrical contact by bringing together two components under very low force, then pressing them together in a z-axis direction. Chip-scale technology is demanding interconnects of 200-400 I/O today, and 1500 I/
0
per in
2
will soon be needed. Conventional ZIF and LIF connector size is limited by tolerances of the molding process. For example the molded body of very large high I/O count ZIF connector tends to warp, leading to non-coplanar leads. One solution to this problem is to decrease pitch and size, but this compromises manufacturability and reliability. The interconnect industry is a multi-billion dollar market worldwide, thus, a need and a ready market exists for a high density interconnect system. Clearly, today's conventional approach of linear connectors that utilize a single side of the printed circuit board (PCB) or flexible circuit will not meet the need, and even using both sides of the board is only a marginal improvement.
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Gillette Joseph G.
Mulligan Robert J.
Potter Scott G.
Abrams Neil
Dorinski Dale W.
Motorola Inc.
Zarroli Michael C.
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