Semiconductor Substrate Sensor Patterning for Temperature Control
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Solution Overview
Problem
In semiconductor processing, non-uniform temperature distributions in processing tool components due to lack of accurate temperature feedback lead to high defect rates and shortened component life, resulting from thermal stress and particle defects on wafers.
Innovation Solution
Precision patterning of sensors and heating elements directly on substrate surfaces within semiconductor processing tools, enabling accurate temperature control and feedback, which reduces temperature gradients and extends component life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive components or components with inaccurate temperature feedback are used, then device complexity is reduced, but temperature uniformity deteriorates leading to high defect rates
Solution Approach 1:
The patent combines the temperature sensor and heating element directly into the processing tool component substrate, creating an integrated temperature control system. This merging eliminates the need for separate feedback mechanisms while achieving accurate temperature control and uniformity, thereby reducing defect rates without significantly increasing overall system complexity.
Solution Approach 2:
The patent implements a closed-loop feedback system where temperature sensors continuously monitor the substrate temperature and provide real-time data to control the heating elements. This feedback mechanism enables dynamic temperature adjustment to maintain uniform temperature distribution, directly addressing the defect rate issue caused by temperature non-uniformity.
2Duration of action of stationary object
If components lack accurate temperature feedback, then manufacturing cost is reduced, but component life deteriorates due to thermal stress cracking
Solution Approach 1:
The patent incorporates temperature sensors and heating elements during the substrate manufacturing process itself, rather than adding them as separate components later. This preliminary integration ensures proper thermal coupling and eliminates installation errors, enabling accurate temperature feedback from the outset and preventing thermal stress cracking that would reduce component life.
Solution Approach 2:
The integrated sensor-heating system enables the component to self-regulate its temperature, monitoring its own thermal state and adjusting heating accordingly. This self-service capability prevents thermal runaway and stress accumulation, extending component life without requiring external complex control systems.
3Temperature
If temperature feedback mechanisms are added to processing tool components, then temperature uniformity improves, but device complexity increases
Solution Approach 1:
The patent merges the temperature control functionality directly into the substrate by patterning sensors and heating elements on the substrate surface. This integration eliminates the need for separate mounting brackets, wiring harnesses, and control housings, achieving excellent temperature uniformity while minimizing the increase in overall device complexity.
Solution Approach 2:
The patent applies temperature sensors and heating elements at specific locations on the substrate where temperature control is most critical. This localized approach provides targeted temperature uniformity improvement without adding feedback mechanisms to the entire component structure, thereby balancing temperature control performance with 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
This approach achieves improved temperature uniformity, reduces wafer defects, and extends the life of processing tool components by allowing for precise temperature control and predictive maintenance.
Implementation Method 1
a sensor disposed directly on a surface of the substrate oriented towards a plasma region inside of the semiconductor processing tool
Implementation Method 2
a heating element disposed directly on the surface of the substrate oriented towards the plasma region inside of the semiconductor processing tool
Implementation Method 3
the temperature of the processing tool components can affect the rate of processing. For example, chamber lid temperature variation can create a large gradient in the wafer etch rate
Data Source
AI summary
Embodiments involve smart device fabrication for semiconductor processing tools via precision patterning. In one embodiment, a method of manufacturing a semiconductor processing tool component includes providing a substrate of the semiconductor processing tool component, patterning the substrate to form a sensor directly on the substrate, and depositing a top layer over the sensor. The sensor may include, for example, a temperature or strain sensor. The method can also include patterning the substrate to form one or more of: heaters, thermistors, and electrodes on the substrate. In one embodiment, the method involves patterning a surface of the component oriented towards a plasma region inside of the semiconductor processing tool.