Multi-Plane Integrated Antenna Design for IC Testing
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Solution Overview
Problem
Integrated antennas in chips face challenges due to increased area requirements, which can lead to higher manufacturing costs and reduced operational efficiency, especially when used for both signal exchange and power transfer, and are vulnerable during the wafer singulation process.
Innovation Solution
An integrated antenna is designed to develop on different planes within the peripheral portion of the integrated circuit, close to the scribe line, using metallization levels connected across planes to minimize area and interference, and is integrated with a seal ring structure that includes pillar structures and conductive lines to enhance mechanical strength and reduce eddy currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an integrated antenna is designed to operate on a single plane, then the design is simpler, but the antenna requires larger area and is more vulnerable during wafer singulation
Solution Approach 1:
The patent transitions the antenna design from a single-plane configuration to a multi-plane three-dimensional structure. The antenna conductors are distributed across multiple metallization layers (e.g., first, second, and third planes), creating a spatially distributed antenna system that reduces the footprint on any single plane while maintaining or enhancing antenna performance.
2Device complexity
If an integrated antenna is designed to operate on a single plane, then the design is simpler, but the antenna is more vulnerable during wafer singulation
Solution Approach 1:
The patent transitions the antenna design from a single-plane configuration to a multi-plane three-dimensional structure. The antenna conductors are distributed across multiple metallization layers (e.g., first, second, and third planes), creating a spatially distributed antenna system that reduces the footprint on any single plane while maintaining or enhancing antenna performance.
Solution Approach 2:
The antenna structure is segmented across multiple independent planes or metallization layers. Each plane contains conductor traces that are spatially separated from others, creating a distributed antenna system where the functional elements are divided into distinct segments located at different heights or positions in the three-dimensional structure.
3Ease of manufacture
If traditional seal ring structures are used, then the manufacturing process is simpler, but eddy currents cause interference and reduce efficiency
Solution Approach 1:
The seal ring structure is segmented into multiple discrete conductor traces distributed across different planes, rather than forming a continuous closed loop. This segmentation interrupts the path for eddy currents, preventing their formation while maintaining the seal ring's protective and grounding functions.
Solution Approach 2:
The seal ring conductors are arranged in three-dimensional space across multiple metallization layers, creating a distributed structure that spans different planes. This spatial distribution prevents the formation of continuous closed loops that would support eddy currents, while maintaining effective grounding and shielding.
4Ease of manufacture
If antenna area is reduced, then manufacturing cost decreases, but operational efficiency may be compromised
Solution Approach 1:
The patent transitions the antenna design from a single-plane configuration to a multi-plane three-dimensional structure. The antenna conductors are distributed across multiple metallization layers (e.g., first, second, and third planes), creating a spatially distributed antenna system that reduces the footprint on any single plane while maintaining or enhancing antenna performance.
Solution Approach 2:
The patent combines multiple antenna conductor traces from different planes into a unified three-dimensional antenna system. The conductors on various metallization layers work together as integrated elements, with their combined electromagnetic fields producing the desired antenna radiation pattern and impedance characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the antenna's area footprint, maintains operational efficiency, and enhances mechanical strength, while minimizing interference and eddy currents, thus improving the chip's performance and manufacturing efficiency.
Implementation Method 1
The antenna may be used for exchanging signals and/or power with an external device through a wireless connection
Implementation Method 2
minimizing interference and eddy currents
Data Source
AI summary
A probe card for integrated circuit testing includes a printed circuit support and a probe head having a first surface mounted to a surface of the printed circuit support. A flexible substrate is positioned adjacent to a second surface of the probe head and includes at least one flexible extension which extends beyond an edge of the probe head and includes a bend to make contact with the surface of the printed circuit support. The flexible substrate further includes a test antenna configured to support a wireless communications channel with an integrated circuit under test. The integrated circuit under test includes at least one conductive structure that extends in the peripheral portion on different planes of metallizations to form an integrated antenna that is coupled for communication and/or power transfer to the test antenna.