Semiconductor Package Leads for Video Bandwidth Decoupling
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Solution Overview
Problem
Existing semiconductor device packages face challenges in achieving enhanced video bandwidth and linearity due to limitations in capacitance and impedance matching, particularly for high power and high frequency applications like 5G cellular networks, where intermodulation distortion and memory effects are significant.
Innovation Solution
Incorporation of decoupling leads and off-package decoupling capacitors within the semiconductor device package, which facilitate the use of external capacitors to meet video bandwidth specifications, enhancing capacitance and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional package structures are used, then device simplicity is maintained, but video bandwidth and capacitance performance are insufficient for high-frequency applications
Solution Approach 1:
The package structure is segmented by adding dedicated decoupling leads (leads 35 and 36) separate from the main signal leads, allowing independent capacitance coupling paths. This segmentation enables enhanced video bandwidth performance through off-package decoupling capacitors while maintaining clear functional separation between signal transmission and decoupling functions.
Solution Approach 2:
The package structure integrates multiple functions: the flange provides mechanical mounting and thermal dissipation, the frame provides structural support and shielding, the leads provide signal transmission, and the decoupling leads provide capacitance coupling. This multi-functionality allows a single package to meet complex high-frequency performance requirements without requiring multiple separate components.
2Reliability
If off-package decoupling capacitors are used, then video bandwidth specifications are met, but package complexity increases
Solution Approach 1:
The decoupling leads (35, 36) act as intermediaries between the amplifier device and off-package decoupling capacitors. These leads provide dedicated electrical pathways for capacitance coupling, enabling the use of external capacitors to meet video bandwidth specifications while maintaining a clear and organized package structure that does not significantly increase overall complexity.
3Manufacturing precision
If additional decoupling leads are added, then capacitance and impedance matching are improved, but manufacturing complexity increases
Solution Approach 1:
The decoupling leads are pre-configured in the package structure with predetermined positions and connections to the amplifier device. This preliminary configuration of capacitance coupling paths allows for precise impedance matching to be built into the package design, reducing the need for complex post-assembly adjustments and simplifying the manufacturing process.
Data Source
AI summary
Semiconductor device packages including leads for enhanced video bandwidth and related operating criteria are described. An example package includes a flange having a top surface, a frame secured to the flange, and a pair of output leads. The frame forms an air cavity bounded in part by the top surface of the flange. The pair of output leads extend from outside the frame, through at least a portion of the frame, and to within the air cavity. The package also includes a decoupling lead positioned between the pair of output leads. The package also includes a second decoupling lead positioned between the pair of output leads in some examples. The decoupling lead or leads between the output leads facilitate the use of off-package decoupling capacitors to meet video bandwidth and other operating specifications. The package can also include one or more additional decoupling leads between input leads.