Technique for laminating multiple substrates

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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Details

C029S825000, C029S832000, C029S840000, C228S180100, C228S180210, C228S180220, C257S678000

Reexamination Certificate

active

07490402

ABSTRACT:
The present invention provides a number of techniques for laminating and interconnecting multiple substrates to form a multilayer package or other circuit component. A solder bump may be formed on the conductive pad of at least one of two or more substrates. The solder bump preferably is formed from an application of solder paste to the conductive pad(s). Adhesive films may be positioned between the surfaces of the substrates having the conductive pads, where the adhesive films include apertures located substantially over the conductive pads such that the conductive pads and/or solder bumps confront each other through the aperture. The two or more substrates then may be pressed together to mechanically bond the two or more substrates via the adhesive films. The solder bump(s) may be reflowed during or after the lamination to create a solder segment that provides an electrical connection between the conductive pads through the aperture in the adhesive films.

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Deepak K. Pai, “An Approach to Fabricate High Density, Large-Layer-Count PWB,” presented at the Printed Circuits Expo 2000, Apr. 2-6, 2000, San Diego, California, pp. S09-2-1 to S09-2-4.
Deepak K. Pai, “An Approach to Fabricate High Density, Large-Layer-County PWB,” Design Technical Journal, vol. 2, No. 2, Spring/Summer 2000, pp. 16-18.
Deepak K. Pai, “An Approach to Fabricate High Density, Large-Layer-County PWB,” Surface Mount Technology Association (SMTA) International Proceedings 2001, Sep. 30-Oct. 4, 2001, pp. 569-579.
International Search Report for Application No. PCT/US03/07842 dated Sep. 23, 2003.

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