Wiring Open Detection Circuit Using Diode and Test Bus
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Solution Overview
Problem
In semiconductor integrated circuits, detecting open/short failures in long-distance wirings is challenging due to the complexity of existing methods, which require advanced preparation and software, making rapid failure analysis difficult with simple configurations.
Innovation Solution
A wiring open detection circuit that includes a signal processing circuit, a terminal, a diode, and an open decision circuit, where the diode is connected to a test bus, and a voltage is applied to detect changes in current flowing through the wiring to determine if it is open, allowing for prompt decision-making on wiring openness using a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a failure analysis device using optical signal or electric signal is used to detect open/short of wirings, then detection capability is improved, but device complexity and preparation requirements increase
Solution Approach 1:
The patent extracts the essential detection function from complex failure analysis devices and implements it using a simple diode-based circuit. By taking out only the necessary components (diode, test bus, voltage source) and removing unnecessary complexity (optical systems, software, advanced preparation), the invention achieves wiring open detection with minimal device complexity while maintaining detection capability.
2Measurement precision
If advance preparation and software for analysis are required, then detection accuracy is improved, but analysis speed decreases
Solution Approach 1:
The diode-based detection circuit is self-sufficient and does not require external software or complex preparation procedures. The circuit automatically detects wiring opens through its inherent electrical characteristics (current flow measurement), eliminating the need for advance preparation and software analysis, thus achieving both detection accuracy and rapid analysis simultaneously.
3Adaptability or versatility
If the number of wirings and wiring distances are increased, then circuit functionality is improved, but detection difficulty increases
Solution Approach 1:
The patent introduces a diode as an intermediary component between the test bus and the wiring under test. This diode mediator simplifies the detection process by providing a clear electrical path and measurable current signal, making it easier to detect opens even in circuits with many wirings and long distances, thus maintaining detection ease while supporting increased circuit functionality.
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
Enables rapid and simple detection of open failures in multiple wirings, improving the efficiency of failure analysis in semiconductor integrated circuits by using a diode and test bus configuration to assess current changes.
Implementation Method 1
The diode has one end connected to the terminal. The open decision circuit applies a first voltage to the other end of the diode, and detects change in a current flowing in the first wiring
Data Source
AI summary
In one embodiment, a wiring open detection circuit includes a signal processing circuit, a terminal, a diode, and an open decision circuit. The signal processing circuit is connected to one end of a first wiring and outputs a signal processed signal to the first wiring. The terminal is connected to the other end of the first wiring. The diode has one end connected to the terminal. The open decision circuit applies a first voltage to the other end of the diode, and detects change in a current flowing in the first wiring to decide whether or not the first wiring is open.