Localized Annealing via Radiation Absorbing Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current annealing processes expose entire substrates to high temperatures, leading to undesirable inter-diffusion and warpage, as they heat the entire substrate regardless of only needing to anneal specific portions, causing unintended material interactions.
Innovation Solution
The method involves forming a radiation absorbing layer adjacent to an annealable layer and directing radiation to heat the absorbing layer, thereby annealing only the necessary areas without affecting non-adjacent sections, using tailored susceptor materials to absorb radiation and control heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional annealing processes (furnace, RTP, microwave) are used to heat the entire substrate, then uniform annealing treatment is achieved across the substrate, but undesirable inter-diffusion, substrate warpage, and inter-reactions occur in areas where such effects are unwanted
Solution Approach 1:
The patent applies local quality by making different regions of the substrate undergo different thermal treatments. A radiation-absorbing layer is selectively formed in specific regions to absorb radiation and generate localized heat, while other regions remain cool. This enables precise spatial control over annealing treatment, achieving the desired manufacturing precision without causing harmful effects in non-annealed regions.
Solution Approach 2:
The patent segments the substrate into annealed and non-annealed regions by selectively forming radiation-absorbing layers in specific areas. This segmentation allows independent thermal management of different substrate regions, enabling the annealed portions to receive uniform treatment while preventing warpage and inter-diffusion in the non-annealed portions.
2Reliability
If the entire substrate is exposed to high temperatures for annealing, then all areas receive the required thermal treatment, but thermal budget is exceeded and energy consumption increases
Solution Approach 1:
The patent implements local quality by applying thermal treatment only where needed through selectively positioned radiation-absorbing layers. These layers absorb radiation and convert it to heat locally, ensuring complete annealing treatment in required areas while avoiding unnecessary heating elsewhere, thus reducing overall energy consumption and thermal budget.
Solution Approach 2:
The patent applies partial action by heating only the specific regions that require annealing treatment rather than the entire substrate. The radiation-absorbing layers are formed only in areas needing thermal processing, enabling partial annealing that achieves the required treatment completeness while minimizing energy waste.
3Ease of operation
If conventional heating methods are used, then the entire substrate is heated uniformly, but control over localized thermal treatment is lost
Solution Approach 1:
The patent achieves localized annealing control through local quality by incorporating radiation-absorbing layers with specific spatial distribution. These layers selectively absorb radiation in predetermined patterns, enabling precise control over which areas undergo annealing. The simple radiation application process combined with patterned absorbing layers provides both ease of operation and high manufacturing 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 localized annealing, minimizing thermal budget exceedance and enabling separate optimization of anneal procedures for different layers, achieving precise thermal treatment without overheating or warping the substrate.
Implementation Method 1
forming a radiation absorbing layer on the substrate. The radiation absorbing layer heats up in response to radiation
Implementation Method 2
the radiation absorbing layer heats up in response to radiation, and the radiation absorbing layer is formed adjacent to at least a portion of the annealable layer
Data Source
AI summary
A method for fabricating an apparatus using radiation annealing includes forming an annealable layer on a substrate. A radiation absorbing layer is also formed on the substrate, wherein the radiation absorbing layer heats up In response to radiation, and the radiation absorbing layer is formed adjacent to at least a portion of the annealable layer and non-adjacent to a portion of the apparatus. Radiation is directed toward the apparatus to heat up the radiation absorbing layer to anneal the at least a portion of the annealable layer that is adjacent to the radiation absorbing layer without annealing the portion of the apparatus that is non-adjacent to the radiation absorbing layer.