Photonic Bandgap Waveguide for IC Signal Radiation
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Solution Overview
Problem
As frequencies in electronic components increase, signal radiation becomes a significant issue due to the short wavelengths of signals, which can act as antennas, leading to energy loss when signal lines exceed a certain distance, and existing encapsulation methods do not effectively address this problem during the packaging process.
Innovation Solution
Incorporating a photonic bandgap structure within the encapsulation material of integrated circuit packages using additive manufacturing, which forms a waveguide to minimize signal radiation by guiding electromagnetic signals with minimal loss, thereby reducing the need for additional packaging steps and enhancing functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If signal lines are extended to transmit high-frequency signals over longer distances, then signal transmission capability is improved, but signal radiation loss increases due to short wavelengths acting as antennas
Solution Approach 1:
The encapsulation material is segmented into a photonic bandgap structure with periodic high and low dielectric constant regions, creating a waveguide that confines and guides electromagnetic signals along the signal line, preventing radiation loss while enabling longer transmission distances
Solution Approach 2:
The photonic bandgap structure acts as an intermediary between the signal source and the external environment, confining electromagnetic energy within the waveguide path and mediating signal transmission to prevent unwanted radiation while maintaining signal integrity over extended distances
2Loss of energy
If photonic bandgap structure is incorporated into encapsulation material, then signal radiation is reduced and signal transmission is improved, but manufacturing complexity increases
Solution Approach 1:
The photonic bandgap waveguide structure is merged with the encapsulation material itself, combining the protective encapsulation function with the signal guidance function into a single integrated structure, thereby reducing the need for separate waveguide components and simplifying manufacturing
Solution Approach 2:
The encapsulation material serves multiple functions simultaneously: it provides mechanical protection, environmental sealing, and electromagnetic signal guidance through the integrated photonic bandgap structure, eliminating the need for additional dedicated waveguide structures
3Loss of energy
If additional packaging steps are added to implement waveguide structures, then signal radiation control is improved, but manufacturing process complexity and cost increase
Solution Approach 1:
The waveguide structure is combined with the encapsulation molding process itself, allowing the photonic bandgap structure to be formed during the standard encapsulation step rather than requiring separate waveguide fabrication and assembly operations, thereby maintaining manufacturing efficiency
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 implementation of a photonic bandgap structure within the encapsulation material effectively reduces signal radiation, allowing for the efficient propagation of high-frequency signals over longer distances with minimal loss, thereby improving the performance and functionality of integrated circuit packages without increasing costs or complexity.
Implementation Method 1
a photonic bandgap structure within the encapsulation material of an integrated circuit package. The photonic bandgap structure may include a waveguide that minimizes signal radiation
Implementation Method 2
which forms a waveguide to minimize signal radiation by guiding electromagnetic signals with minimal loss
Implementation Method 3
When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization. This creates an internal electric field which reduces the overall field within the dielectric itself
Data Source
AI summary
An encapsulated integrated circuit package is provided that includes an integrated circuit (IC) die. A radio frequency (RF) circuit on the IC die is operable to send and/or receive an RF signal having a selected frequency. Encapsulation material encapsulates the IC die. A photonic waveguide couples to the RF circuit and extends to an external surface of the encapsulated IC. The photonic waveguide may be formed by a photonic bandgap structure within the encapsulation material. A socket may be included with the encapsulated package that is coupled to an end of the photonic waveguide opposite the RF circuit.