Curved lead configurations
First Claim
1. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
- a structure defining a lead-bearing surface;
a terminal end for connection to the first microelectronic element, said terminal end disposed on said lead-bearing surface and fixed to said structure;
a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface and spaced apart on said lead-bearing surface from said terminal end on an offset axis;
a first curved lead interconnecting said tip end and said terminal end; and
a second curved lead interconnecting said tip end and said terminal end.
3 Assignments
0 Petitions
Accused Products
Abstract
A microelectronic assembly includes first and second microelectronic elements having confronting surfaces that are spaced apart from one another. Vertically extensive flexible lead elements interconnect electrical connections on the microelectronic elements. Each of the flexible lead elements may include a plurality of curved conductors that are electrically connected and parallel to one another. The lead elements may initially be formed on a lead bearing surface, and have a terminal end for connection to the first microelectronic element, and a tip end for connection to the second microelectronic element. The terminal end is disposed on the lead bearing surface and fixed to it, while the tip end is releasably connected to the lead bearing surface, and spaced apart from the terminal end on an offset axis. Curved leads interconnect the tip end and the terminal end.
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Citations
40 Claims
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1. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
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a structure defining a lead-bearing surface; a terminal end for connection to the first microelectronic element, said terminal end disposed on said lead-bearing surface and fixed to said structure; a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface and spaced apart on said lead-bearing surface from said terminal end on an offset axis; a first curved lead interconnecting said tip end and said terminal end; and a second curved lead interconnecting said tip end and said terminal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 33)
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13. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
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a structure defining a lead-bearing surface; a terminal end for connection to the first microelectronic element, said terminal end disposed on said lead-bearing surface and fixed to said structure; a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface, said tip end further being spaced apart on said lead-bearing surface from said terminal end; and a curved lead connecting said tip end and said terminal end, said curved lead having a bulge at one of said ends, said lead being substantially tangent to said bulge. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
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a structure defining a lead-bearing surface; a terminal end for connection to the first microelectronic element, said terminal end disposed on said lead-bearing surface and fixed to said structure; a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface, said tip end also being spaced apart on said lead-bearing surface from said terminal end along an offset axis; a generally S-shaped lead connecting said tip end and said terminal end, said S-shaped lead having a first curve in a first direction and a second curve in a second direction opposite said first direction, said first curve having a curve angle of at least 90 degrees as measured by an angle that a vector tangent to the lead entering the curve must be rotated to have a direction of a vector tangent to the lead exiting the curve. - View Dependent Claims (20, 21)
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22. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
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a structure defining a lead-bearing surface; a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface; an annular terminal structure for connection to the first microelectronic element, said terminal structure disposed on said lead-bearing surface surrounding and substantially concentric with said tip end and fixed to said structure; a plurality of leads interconnecting said tip end and said terminal structure. - View Dependent Claims (23, 24, 25)
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26. A microelectronic lead assembly for connecting first and second microelectronic elements, said lead assembly comprising:
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a structure defining a lead-bearing surface; a terminal end for connection to the first microelectronic element, said terminal end disposed on said lead-bearing surface and fixed to said structure; a tip end for connection to the second microelectronic element, said tip end being releasably connected to said lead-bearing surface; and a lead interconnecting said tip end and said terminal end, said sheet-like lead having a peripheral edge and defining a slot with a plurality of branches, a first one of said branches passing between said tip end and said terminal end and having an opening at said peripheral edge. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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- 34. A microelectronic assembly including first and second microelectronic elements having confronting surfaces spaced apart from one another in a vertical direction, a plurality of electrical connections on said microelectronic elements and a plurality of vertically extensive flexible lead elements interconnecting said electrical connections on said microelectronic elements, each said flexible lead element including a plurality of curved conductors electrically connected in parallel with one another.
Specification