Ground Pad Segmentation for Stable IC Voltage Supply
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Solution Overview
Problem
Conventional semiconductor integrated circuits face errors due to excessive voltage noise caused by counter electromotive forces in bonding wires, leading to variations in internal voltages that can result in erroneous operations.
Innovation Solution
The semiconductor integrated circuit incorporates a voltage stabilizing unit with capacitors and transistors configured to filter out noise components, allowing currents to flow through multiple ground pads and bonding wires in parallel, reducing the total inductance and counter electromotive force, thereby stabilizing the voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If external voltage is applied through bonding wire to semiconductor integrated circuit, then voltage can be supplied to internal circuits, but counter electromotive force generated by inductance component causes excessive voltage noise
Solution Approach 1:
The invention divides the single ground connection into multiple ground pads (first ground pad and second ground pad). The voltage stabilizing unit connects between these separate ground pads, creating multiple current paths. This segmentation reduces the inductance of each bonding wire and distributes the counter electromotive force across multiple paths, thereby reducing voltage noise in the external voltage supplied to internal circuits.
Solution Approach 2:
The voltage stabilizing unit acts as an intermediary component connected between the first and second ground pads. It includes capacitors that stabilize the voltage difference between ground pads and suppress noise. This intermediary structure provides a low-impedance path for high-frequency noise currents, preventing them from affecting the external voltage supplied to internal circuits.
2Reliability
If voltage stabilizing unit is added to reduce noise, then voltage stability improves, but device complexity increases
Solution Approach 1:
The voltage stabilizing unit operates autonomously to stabilize voltage between ground pads without requiring external control signals or complex feedback circuits. The capacitors automatically respond to voltage fluctuations by charging and discharging, providing noise suppression and voltage stabilization through passive components alone, thus improving reliability without significantly increasing complexity.
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 configuration effectively reduces voltage noise, ensuring a more stable driving voltage for the semiconductor integrated circuits, minimizing errors and improving operational reliability.
Implementation Method 1
a first capacitor that can be connected between a voltage terminal and a ground terminal of a first internal circuit; a second capacitor that can be connected between a voltage terminal and a ground terminal of a second internal circuit
Implementation Method 2
a voltage stabilizing unit that can be configured to apply noise of the voltage supplied to the first capacitor to the second capacitor
Implementation Method 3
allowing currents to flow through multiple ground pads and bonding wires in parallel, reducing the total inductance and counter electromotive force
Data Source
AI summary
A semiconductor integrated circuit can include a first voltage pad, a second voltage pad, and a voltage stabilizing unit that is connected between the first voltage pad and the second voltage pad. The first voltage pad can be connected to a first internal circuit, and the second voltage pad can be connected to a second internal circuit.