SiC Boule Growth Using Polymer-Derived Volumetric Shapes
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Solution Overview
Problem
There is a long-standing need for cost-effective methods to produce high-quality single crystal SiC boules for electronic components, as existing methods are inefficient and expensive.
Innovation Solution
The development of volumetric shapes made from polymer-derived SiC using a binder, which are then used in vapor deposition processes to form SiC boules, allowing for controlled flux formation and improved boule quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce SiC boules, then the process is established and reproducible, but the manufacturing cost is high and efficiency is low
Solution Approach 1:
The invention changes the physical-chemical parameters of the starting material by using polymer-derived SiC granules with specific characteristics (particle size distribution, surface area, reactivity) instead of conventional SiC sources. This parameter change enables more efficient vapor deposition while maintaining process control, thereby reducing manufacturing cost and improving productivity simultaneously
2Manufacturing precision
If polymer-derived SiC granules are used as starting material, then flux formation is controlled and boule quality is improved, but the process complexity increases
Solution Approach 1:
The polymer-derived SiC granules are prepared in advance with specific properties (particle size, surface area, reactivity) that pre-determine the flux formation characteristics during vapor deposition. This preliminary preparation of the starting material with optimized properties simplifies the actual deposition process while ensuring high boule quality, as the material is pre-conditioned to react predictably
3Volume of stationary object
If vapor deposition is used to grow large boules, then boule size is increased, but the growth time and energy consumption increase
Solution Approach 1:
The vapor deposition process using polymer-derived SiC granules maintains continuous and stable flux formation throughout the growth cycle, preventing interruptions or slowdowns. The high reactivity and controlled sublimation of the polymer-derived material ensure consistent material supply to the growing boule, enabling faster growth rates and reducing total growth time while achieving large boule sizes
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 method enables the production of high-quality SiC boules with consistent flux formation, increased boule size, and reduced defects, leading to improved electronic component performance and reduced manufacturing costs.
Implementation Method 1
a binder, wherein the binder binds the SiC granules
Implementation Method 2
Silicon carbide does not generally have a liquid phase, instead it sublimes, under vacuum, at temperatures above about 1,700° C.
Implementation Method 3
a solid or liquid starting material is transformed into a gas or vapor state, and then the gas or vapor is deposited to form, e.g., grow, a solid material
Data Source
AI summary
Volumetric shapes of SiC starting materials for boule growth. Methods of controlling vapor deposition growth of SiC boules, and providing directional flux. Methods of increase the number of wafers, the number of electronic components and the number of operable devices from a single boule growth cycle.