Multi-component electronic package with planarized embedded-components substrate

Abstract

An electronic multi-component package is assembled by placing multiple electronic components within multiple openings of a package substrate, then depositing and curing adhesive filler in gaps between the components and the inner peripheries of the openings. Circuit features, including conductive interconnects, are formed by thin-film photolithography over both front and back surfaces of the package substrate. Preformed conductive vias through the package substrate provide electrical connection between circuit features on opposite substrate surfaces. Additional electronic components may be attached to conductive lands on at least one side of the package. The circuit features also include contact pads for external package connections, such as in a ball-grid-array or equivalent structure.

Description

TECHNICAL FIELD [0001]The present invention relates to integrated circuit (IC) chip packages and the mounting of one or more IC dice to a support substrate and / or frame together with associated circuit components and interconnects.BACKGROUND ART [0002]Multi-component electronic packages and system-in-package (SIP) packages that are employed in the electronics industry today all utilize substrates for device inter-connection and attachment. Typical organic substrate materials are epoxy-glass, polyimide, and fluoropolymer laminates. Typical inorganic substrate materials are ceramics, low-temperature co-fire ceramics (LTCC) and silicon. The interconnect circuitry and component attach features are fabricated onto the substrates prior to components assembly.[0003]With the exception of a silicon substrate, which employs thin-film metal deposition processes for the circuitry fabrication to yield line geometries on the order of one micrometer, all of the other substrate materials yield line...

AI Technical Summary

Benefits of technology

[0007]Package components are thus assembled onto the substrate to form an extremely compact, highly integrated, multi-component package or system-in-package (SIP) that provides an extremely small footprint and low profile. The electrical performance of the package is improved due to the ability to place the IC dice and other components in close proximity. The thin-film conductive interconnects formed on the planarized surfaces allow a much finer line width and spacing geometry in comparison with even the most advanced printed circuit board technologies. It also allows precise, high Q, integrated passive inductors to be formed in close proximity to the IC dice. With the interconnect layers deposited directly above and below the IC dice, a more efficient use is made of the package's footprint area, resulting in a smaller package size. The standard die-attach, wire bond or flip-chip attach processes can be eliminated by using this embedded components method.

Problems solved by technology

A silicon substrate can only be used in single-sided applications and is often fragile in the final package form.

The resultant longer interconnect lengths can also compromise package performance.

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