Selective Laser Deposition for Semiconductor Structures
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Solution Overview
Problem
Existing semiconductor manufacturing processes are inadequate for scaled-down devices, particularly in achieving precise control over material deposition and patterning, leading to inefficiencies and increased costs as device sizes decrease.
Innovation Solution
The method involves forming a first and second material on a semiconductor substrate, where a laser beam heats these materials to different temperatures, allowing for selective deposition of a third material by controlling the laser absorption coefficients and heating times, enabling precise control over the formation of semiconductor structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deposition processes are used for scaled-down devices, then manufacturing complexity increases and costs increase, but material deposition precision deteriorates
Solution Approach 1:
The patent replaces conventional thermal field-based deposition control with a targeted laser heating system. The laser beam selectively heats specific regions of the substrate to precise temperatures, enabling material deposition only in desired areas. This substitution of mechanical/thermal control with optical control achieves superior deposition precision while simplifying the overall manufacturing process for scaled-down devices.
Solution Approach 2:
The patent applies local quality by creating spatially varying temperature zones through selective laser heating. Different regions of the substrate receive different amounts of laser energy, resulting in localized temperature differences that control where material deposits. This allows precise spatial control over deposition patterns, enabling complex structures to be formed with simpler processes.
2Manufacturing precision
If selective deposition is attempted without precise temperature control, then manufacturing costs decrease, but deposition selectivity deteriorates
Solution Approach 1:
The patent changes the temperature parameter through controlled laser heating to achieve selective deposition. By precisely controlling the laser power, duration, and focal point, specific regions reach temperatures that enable material deposition while other regions remain below the deposition threshold. This parameter control provides high deposition selectivity with relatively simple process equipment.
3Manufacturing precision
If laser heating is applied to achieve selective deposition, then material deposition precision improves, but energy consumption increases
Solution Approach 1:
The patent applies partial action by using laser heating only in the specific regions where material deposition is required, rather than heating the entire substrate. The laser beam is focused on localized areas and applied for controlled durations, providing just enough energy to reach the deposition temperature threshold only where needed. This minimizes overall energy consumption while maintaining high deposition precision.
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 allows for selective material deposition with improved precision and reduced manufacturing costs by ensuring the third material is formed only on the first material, while avoiding unwanted deposition on the second material, thus enhancing the semiconductor structure formation process.
Implementation Method 1
The first material and the second material are heated with a laser beam
Implementation Method 2
by controlling the laser absorption coefficients and heating times
Data Source
AI summary
A method for forming a semiconductor structure is provided. The method includes forming a first material and a second material on a semiconductor substrate. The first material is different from the second material. The method also includes heating the first material to a first temperature and the second material to a second temperature with a laser beam. The first temperature is different from the second temperature. The method also includes depositing a third material on the first material.