RF Transmission Line for IC Package Interconnects
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Solution Overview
Problem
Multi-chip integrated circuit (IC) packages face complexity and interference issues due to digital interfaces requiring multiple lines and electrostatic discharge (ESD) protection, which can lead to harmonic interference and other types of interference.
Innovation Solution
A transmission line within the IC package, such as a microstrip transmission line, is used for RF signal communication between chips, reducing complexity by allowing high-rate signals to be transported on a single line and providing a controlled environment that suppresses interference, with RF transceivers coupled to the line via taps for efficient signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple lines are used for digital interface communication between chips, then communication capability is improved, but package complexity increases
Solution Approach 1:
The patent combines multiple communication functions into a single transmission line by using RF transceivers that can communicate multiple bits in parallel over one line, eliminating the need for multiple separate digital interface lines and reducing package complexity
2Reliability
If ESD protection circuitry is added to digital interfaces, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex digital interface circuitry with RF-based communication, where RF transceivers inherently provide robust communication without requiring additional ESD protection circuitry, thereby maintaining reliability while reducing overall device complexity
3Productivity
If digital interface lines are used between chips, then data transmission is achieved, but interference increases
Solution Approach 1:
The patent changes the operating parameters from digital signaling to RF frequency communication, where RF transceivers transmit data modulated on carrier waves, fundamentally altering the signal characteristics to eliminate harmonic interference associated with digital interfaces
Data Source
AI summary
Communication between chips is provided using a transmission line. Any one of the chips may tap into the transmission line, and communicate with another chip tapped into the transmission line by transmitting a radio frequency (RF) signal to the other chip via the transmission line or receiving an RF signal from the other chip via the transmission line. The transmission line may include a microstrip transmission line, a waveguide, a stripline transmission line, or another type of transmission line. The chips may use the transmission line to communicate data, control and/or clock signals with one another.