Semiconductor Package Distribution Element for Signal Homogeneity
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Solution Overview
Problem
In semiconductor packaging, parallel configurations of high-voltage devices like SiC-based MOSFETs face challenges in ensuring homogeneous signal distribution due to parasitic effects such as stray inductance, leading to asymmetric operation and potentially damaging currents.
Innovation Solution
A semiconductor package with a distribution element that creates multiple independent transmission paths with tailored transmission characteristics, using resistors and active devices to compensate for stray inductance and ensure synchronized signal distribution between multiple dies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple parallel semiconductor dies are used to enhance current carrying capability, then productivity and current capacity are improved, but signal distribution becomes non-uniform due to parasitic effects
Solution Approach 1:
The patent applies local quality by introducing different resistance values in different transmission paths. Specifically, the distribution element includes first and second resistors with different resistance values that are coupled to different semiconductor dies, creating localized electrical characteristics that compensate for varying parasitic inductances in each path, thereby achieving uniform signal distribution across multiple parallel dies
Solution Approach 2:
The patent changes the electrical parameters of the transmission paths by incorporating resistors with specifically designed resistance values. The resistance values are selected to compensate for differences in parasitic inductance between transmission paths, transforming the non-uniform electrical characteristics into uniform signal distribution across all parallel semiconductor dies
2Device complexity
If standard bond wire connections are used to connect leads to bond pads, then device complexity is minimized, but stray inductance causes asymmetric operation and potential device damage
Solution Approach 1:
The patent introduces a distribution element as an intermediary component between the lead and the semiconductor dies. This distribution element includes resistors and bond pads that act as mediators to compensate for parasitic inductance in the transmission paths, preventing asymmetric operation and potential device damage while maintaining relatively simple bond wire connections
Solution Approach 2:
The patent extracts the parasitic inductance problem from the overall system by isolating it in the transmission paths and compensating for it specifically in those paths using the distribution element, rather than trying to solve it globally across the entire device structure
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 achieves more homogeneous signal distribution and improved device performance by mitigating asynchronous switching and stray inductance effects, enhancing the reliability and efficiency of high-voltage semiconductor packages.
Implementation Method 1
a distribution element that provides a first transmission path for a first electrical signal between the first lead and the first bond pad of the one or more semiconductor dies and a second transmission path for the first electrical signal between the first lead and the second bond pad
Implementation Method 2
The distribution element comprises at least one integrally formed circuit element that creates a difference in transmission characteristics between the first and second transmission paths
Data Source
AI summary
A semiconductor package includes a die pad comprising a die attach surface, a first lead extending away from the die pad, one or more semiconductor dies mounted on the die attach surface, the one or more semiconductor dies comprising first and second bond pads that each face away from the die attach surface, and a distribution element that provides a first transmission path for a first electrical signal between the first lead and the first bond pad of the one or more semiconductor dies and a second transmission path for the first electrical signal between the first lead and the second bond pad of the one or more semiconductor dies. The distribution element comprises at least one integrally formed circuit element that creates a difference in transmission characteristics between the first and second transmission paths.