Chipping Detection Circuit Layout for Edge Decoupling Capacitors
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Solution Overview
Problem
As semiconductor devices decrease in size, the available area for capacitors is limited, leading to increased voltage fluctuations and potential defects like cracks or chipping during the sawing process, which can cause sensing malfunctions and require effective chipping detection.
Innovation Solution
Incorporating first and second chipping detection circuits with stacked line structures and buffers, connected to a control logic circuit, which can function as capacitors to reduce voltage fluctuations and detect cracks, and isolate or float buffers to operate as power decoupling capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If capacitor area is reduced to accommodate smaller chip sizes, then chip size decreases, but voltage fluctuation increases causing sensing malfunctions
Solution Approach 1:
The chipping detection circuit is designed to perform dual functions: detecting cracks/chipping in the chip edge region and operating as a power decoupling capacitor to reduce voltage fluctuations. By making the same circuit structure serve both purposes, the patent resolves the contradiction between reduced chip size and maintained sensing accuracy without requiring separate dedicated capacitor areas.
Solution Approach 2:
The chipping detection circuit utilizes its own line structure and conductive layers to provide capacitive function for power decoupling. Instead of requiring external dedicated capacitors, the circuit serves itself by using its inherent structural elements (line structure, conductive layers) to generate the necessary decoupling capacitance, thereby maintaining reliability while minimizing additional area requirements.
2Reliability
If chipping detection circuits are added to detect cracks and chipping, then defect detection capability improves, but device complexity increases
Solution Approach 1:
The same chipping detection circuit structure is designed to simultaneously perform crack detection and power decoupling functions. By configuring the circuit to be floatable and isolatable through control logic, the patent enables one circuit structure to serve multiple purposes, thereby improving defect detection capability without proportionally increasing device complexity.
Solution Approach 2:
The chipping detection circuit incorporates dynamic control mechanisms including float switches and isolation switches that can change the circuit's operational state based on testing requirements. This dynamic configurability allows the circuit to adapt between different functions (detection mode vs. capacitor mode) without requiring separate static circuit structures, thus managing complexity while enhancing functionality.
3Reliability
If multiple chipping detection circuits are placed adjacent to each other in chip edge region, then defect detection coverage improves, but available area for other components decreases
Solution Approach 1:
Multiple chipping detection circuits placed adjacent in the chip edge region are configured to simultaneously serve as both detection circuits and power decoupling capacitors. This multi-functional design allows the circuits to provide enhanced defect detection coverage while also contributing to voltage stabilization, thereby reducing the need for separate dedicated capacitor areas and minimizing the impact on overall available area.
Solution Approach 2:
The patent utilizes the chip edge region - a peripheral area that might otherwise be underutilized or wasted space - to place multiple chipping detection circuits. By operating in this peripheral dimension rather than consuming central functional area, the patent achieves improved defect detection coverage while preserving valuable interior area for other components.
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 enhances semiconductor device performance by reducing noise from power voltage fluctuations and effectively detecting and preventing defects, improving the reliability of semiconductor devices.
Implementation Method 1
a control logic circuit configured to float the input buffer of the first chipping detection circuit by using a first switch, float the input buffer of the second chipping detection circuit by using a second switch
Implementation Method 2
the line structure comprising a line connected from a first conductive layer to a second conductive layer of the semiconductor device
Data Source
AI summary
A semiconductor device having a capacitor architecture using chipping detection circuits. The semiconductor device includes a first chipping detection circuit and a second chipping detection circuit adjacent to each other in a chip edge region of the semiconductor device, having a same shape as each other, in which contacts and lines are stacked as multiple layers, and each including a line structure, an input buffer, and an output buffer connected to the line structure, and a control logic circuit configured to float the input buffers of the first and second chipping detection circuits. The control logic circuit configured to provide a first power voltage to the line structure of the first chipping detection circuit and a second power voltage to the line structure of the second chipping detection circuit.