Slot Antenna Width Variation for Misalignment Robustness
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Solution Overview
Problem
The existing methods for forming slot antennas on semiconductor packages face challenges with misalignment during the separate processes of creating apertures in conductive films and interposer substrates, leading to deteriorated antenna characteristics, and increasing aperture widths to address this issue compromises shielding performance.
Innovation Solution
The design incorporates a slot antenna with a first portion having a larger width at the boundary between the first and second slot apertures, providing robustness against misalignment while maintaining effective shielding by ensuring the apertures remain continuous without significantly increasing the aperture area in the conductive film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the aperture width is increased to provide robustness against misalignment, then the reliability of antenna characteristics is improved, but the shielding performance is degraded due to increased aperture area
Solution Approach 1:
The patent applies local quality by creating a variable width aperture where the width changes along the aperture length. The aperture has a first width in the region connecting to the conductive portion and a second width in the region extending toward the side face, with the first width being larger than the second width. This localized width variation provides misalignment robustness at the critical connection region while minimizing the overall aperture area to maintain shielding performance.
Solution Approach 2:
The patent implements preliminary action by forming the aperture with an optimized width distribution before final assembly. The aperture width is predetermined to be larger at the connection region to the conductive portion, providing built-in tolerance compensation that prevents misalignment issues before they can affect antenna characteristics, thereby eliminating the need for excessive aperture width throughout the entire aperture.
2Reliability
If the aperture width is increased to prevent discontinuation due to misalignment, then the reliability of slot antenna continuity is improved, but the aperture area increases causing degradation of shielding performance
Solution Approach 1:
The patent applies local quality by creating a variable width aperture where the width changes along the aperture length. The aperture has a first width in the region connecting to the conductive portion and a second width in the region extending toward the side face, with the first width being larger than the second width. This localized width variation provides misalignment robustness at the critical connection region while minimizing the overall aperture area to maintain shielding performance.
Data Source
AI summary
According to an embodiment, a wireless apparatus includes an interposer substrate, a semiconductor chip, a nonconductive layer, and a conductive film. The interposer substrate includes a conductive portion. The semiconductor chip is mounted on a component mounting face of the interposer substrate. The nonconductive layer is provided on the component mounting face to seal the chip. The conductive film is configured to cover a surface of the nonconductive layer and a side of the interposer substrate and is electrically connected to the conductive portion. The film has a first slot aperture. The conductive portion has a second slot aperture connecting to the first slot aperture. The first and second slot apertures serve as an integrated slot antenna. The antenna has first and second portions. The first portion includes a boundary between the first and second slot apertures and has a width larger than a width of the second portion.