Semiconductor Device Intermediary Shielding for Crosstalk Reduction
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Solution Overview
Problem
High-density pin or solder ball configurations in large-scale integrated circuits lead to increased stray capacitances, causing crosstalk effects between adjacent signal lines, which is particularly problematic for audio processing applications.
Innovation Solution
The semiconductor device incorporates a design where conductive components corresponding to left and right channel signals are separated by at least a third conductive component, reducing stray capacitances and crosstalk by increasing the space between these components, and utilizing a third signal at a fixed voltage level for enhanced shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the space between neighboring leads or traces is reduced to accommodate more pins or solder balls, then the pin count or solder ball count is increased, but the stray capacitances increase causing crosstalk effects
Solution Approach 1:
A ground lead is inserted as an intermediary element between the left channel signal lead and the right channel signal lead. This ground lead acts as a shield that reduces capacitive coupling and crosstalk between the adjacent signal leads, allowing high pin count while maintaining signal integrity for audio applications
2Quantity of substance
If the space between conductive components is reduced to increase pin count, then the device density is improved, but the stray capacitances increase
Solution Approach 1:
The ground lead serves as an intermediary conductive component that reduces stray capacitance between adjacent signal leads. By positioning the ground lead between signal-carrying leads, it creates electrical isolation that minimizes parasitic capacitance effects while allowing high-density pin configurations
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
This design effectively decreases stray capacitances and crosstalk between signal lines, improving audio channel separation without additional computational requirements, while maintaining a high pin or solder ball count.
Implementation Method 1
reducing the space between the neighboring leads/traces incurs increased stray capacitances
Implementation Method 2
the undesired capacitive, inductive, or conductive coupling from a signal line will interfere with a corresponding neighboring signal line; this is the so-called crosstalk effect
Data Source
AI summary
A semiconductor device includes at least a die carried by a substrate, a plurality of bond pads disposed on the die, a plurality of conductive components, and a plurality of bond wires respectively connected between the plurality of bond pads and the plurality of conductive components. The plurality of bond pads respectively correspond to a plurality of signals, and include a first bond pad configured for transmitting/receiving a first signal and a second bond pad configured for transmitting/receiving a second signal. The plurality of conductive components include a first conductive component and a second conductive component. The first conductive component is bond-wired to the first bond pad, and the second conductive component is bond-wired to the second bond pad. The first conductive component and the second conductive component are separated by at least a third conductive component of the plurality of conductive components, and the first signal is asserted when the second signal is asserted.