Semiconductor Power Supply Damping Resistor Antiresonance
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Solution Overview
Problem
The instability in regulator operations due to antiresonance between parasitic inductance and capacitance in power-supply wires and integrated circuits leads to oscillations and unstable power supply in semiconductor devices.
Innovation Solution
Incorporating resistors with different resistance values connected between pad electrodes and power-supply wires, and using capacitors to prevent oscillations, while optimizing wire layouts to minimize parasitic resistances and inductances, thereby stabilizing the regulator operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external capacitor is attached to the semiconductor chip to prevent regulator output oscillations, then regulator stability is improved, but antiresonance occurs between parasitic inductance of wire and parasitic capacitance of integrated circuit causing unstable operations
Solution Approach 1:
A damping resistor is introduced as an intermediary element between the power supply wire and the integrated circuit. This resistor acts as a mediator that dissipates the energy causing antiresonance, thereby eliminating the harmful oscillations while maintaining the stabilizing effect of the external capacitor.
Solution Approach 2:
The parasitic inductance and capacitance that cause antiresonance are converted into a beneficial damping effect by intentionally adding a resistor. The previously harmful resonant oscillations are transformed into controlled energy dissipation, stabilizing the power supply system.
2Manufacturing precision
If wire layout is optimized to minimize parasitic resistances and inductances, then power supply accuracy is improved, but device complexity increases
Solution Approach 1:
The invention changes the electrical parameters of the power supply system by adding a resistor with a specific damping value. This parameter change directly addresses the antiresonance issue without requiring complex wire layout optimizations, thereby improving power supply accuracy while avoiding increased device 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
The solution effectively suppresses antiresonance and voltage drops, ensuring stable and accurate power supply to internal circuits, thereby maintaining operational margins and improving power supply accuracy.
Implementation Method 1
a first resistor connected between a first pad electrode of the semiconductor chip and the power-supply wire, and a second resistor connected between a second pad electrode of the semiconductor chip and the power-supply wire
Implementation Method 2
an external capacitor may be attached to a semiconductor chip with the integrated circuit to prevent oscillations of regulator output
Data Source
AI summary
According to one embodiment, an integrated circuit is formed on a semiconductor chip, a regulator supplies power to the integrated circuit via the power-supply wire, a first resistor is connected between the first pad electrode and the power-supply wire on the semiconductor chip, and a second resistor is connected between the second pad electrode and the power-supply wire on the semiconductor chip and has a resistance smaller than that of the first resistor.