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EP0183598A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A shielded integrated circuit package

Assignee: Augat Inc
•
Filing: 1985-11-12
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Granted: —
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Expires: 2005-11-12
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Abstract

Abstract @ An RF, EMI shielded printed circuit package (10) is provided by embedding within a plastic substrate (12) an electrically-conductive cup (14) having an inwardly-running lip (10) at the top surface of the plastic substrate (12). An electrically-conductive cap (14) is mechanically and electrically secured to the inner edge of the lip (16) of the embedded cup (14), thereby to form a completely RF, EMI shielded cavity in which is placed an integrated circuit chip (22), with the lip (16) carrying external coaxial contact pads (36). Connection to the integrated circuit chip (22) is from contact pads (36) formed in the inwardly-running lip (16) of the cup (14) and is made via internal integral coaxial cable-like components such that the chip (22) may be connected to an external coaxial cable via coaxial cable-like structures running from the external contact pads (36) on the lip (16) through the plastic substrate (12) to internal contact pads (24) adjacent the integrated circuit chip (22). In one embodiment, a plasma etching step is performed after chemical development to increase pattern definition. The purpose of plasma etching is to clean up any microscopic organic contamination that has not been adequately removed by the developing step in the printing. In addition, the plasma etch provides very clean edge definition; so, when doing "additive" plating, no irregularities on the conductor edges are formed, which irregularities in high-speed applications impede the flow of electrons.

Inventors

  • 👤 Sandford Lebow

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 16:48
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/62; H10W70/63; H10W70/635; H10W42/00; H10W42/20; H10W70/611; H10W70/614; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; H10W70/67; H10W70/68; H10W70/682; H10W70/685; H10W72/00; H10W72/50; H10W72/531; H10W72/5363; H10W72/90; H10W72/931; H10W72/932; H10W90/00; H10W90/701; H10W90/751; H10W90/754

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 128 words
An RF, EMI shielded integrated circuit package (10) characterized in that it comprises : a plastic substrate (12), an electrically-conductive cup (14) embedded in said substrate (12), said cup having an inwardly-directed lip (16) at the top surface of said substrate, said lip (16) having contact pads (36) thereon insulated from the lip surrounding said pads (36); an electrically-conductive cap (20) electrically and mechanically connected to said lip (16) at a position inward of said contact pads (36) carried by said lip (16); an integrated circuit (22) having contact pads (24), said circuit being positioned within the structure formed by said cap (20) and said lip (16); and means for connecting contact pads (24) on said integrated circuit (22) to said contact pads (36) on said lip (16).
Claim 2
Dependent Claim 128 words
An RF, EMI shielded integrated circuit package (10) characterized in that it comprises : a plastic substrate (12), an electrically-conductive cup (14) embedded in said substrate (12), said cup having an inwardly-directed lip (16) at the top surface of said substrate, said lip (16) having contact pads (36) thereon insulated from the lip surrounding said pads (36); an electrically-conductive cap (20) electrically and mechanically connected to said lip (16) at a position inward of said contact pads (36) carried by said lip (16); an integrated circuit (22) having contact pads (24), said circuit being positioned within the structure formed by said cap (20) and said lip (16); and means for connecting contact pads (24) on said integrated circuit (22) to said contact pads (36) on said lip (16).
Claim 3
Dependent Claim 59 words
The integrated circuit package of claim 1, characterized in that said means for connecting the contact pads (36) on said lip(16) to the contact pads (24) . on said integrated circuit (22) include coaxial cable-like structures embedded in said plastic substrate (12) and running from said lip-carried contact pads (36) to the vicinity of said integrated circuit chip (22).
Claim 4
Dependent Claim 61 words
The integrated circuit package of claim 1, characterized in that said cup (14) has a bottom exposed at the bottom surface of said substrate(12), and further including thermally-conductive columns (26) from the base of said cup (14) to the bottom of said integrated circuit (22), whereby heat generated by said integrated circuit is dissipated by the bottom of said cup (14).
Claim 5
Dependent Claim 32 words
The integrated circuit package of claim 1, characterized in that said cup (14) has a bottom (50) and in that said integrated circuit (22) lies on the bottom of said cup (14).
Claim 6
Dependent Claim 51 words
The integrated circuit package of claim 1, characterized in that said cup (14) has a bottom (50) and in that the bottom surface of said substrate (12) is provided with a thermally conductive layer (62), said thermally conductive layer (62) being in thermal contact with the bottom(50) of said cup (14).
Claim 7
Dependent Claim 26 words
The integrated circuit package of claim 5, characterized in that said integrated circuit package (10) includes heat sink means (64) attached to said thermally-conductive layer (62).
Claim 8
Dependent Claim 21 words
The integrated circuit package of claim 2, characterized in that a portion of said coaxial cable-like structures are rectilinear in form.
Claim 9
Dependent Claim 54 words
The integrated circuit package of claim 1, characterized in that said package (10) is made via multiple laminations of plastic and metal layers, whereby said metal layers may be adapted to form the walls, vias, central conductors of coaxial cable-like elements, the walls for said elements or other conductive buses required for said package.
Claim 10
Dependent Claim 51 words
The integrated circuit package of claim 1, characterized in that said lip (16) includes perforations (70) therethrough, whereby gases formed during the production of said integrated chip package (10) may be released and such that the lip (16) of said cup (14) may be fixedly attached to said plastic substrate (12).
Claim 11
Dependent Claim 27 words
The integrated circuit package of claim 1, characterized in that portions of said package (10) are made with photopatterning steps including chemical developing followed by plasma etching.

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