Biocompatible Microdevice Fabrication via Segmented Additive-Subtractive Processes
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Solution Overview
Problem
Conventional cleanroom techniques for manufacturing biological microdevices are inefficient for rapid prototyping due to complex design requirements, expensive equipment, and long production times, making them unsuitable for rapid and cost-effective production.
Innovation Solution
A method and system utilizing inexpensive makerspace and benchtop technologies for rapid design and production of biological microdevices, incorporating biocompatible coarse and fine scale additive and subtractive processes with 3D printing and other additive devices, enabling the formation of microelectrode arrays, microneedles, and microfluidic devices within a short timeframe and at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cleanroom techniques are used to manufacture biological microdevices, then manufacturing precision and reliability are improved, but production time increases and cost increases
Solution Approach 1:
The manufacturing process is segmented into two distinct stages: a coarse additive process for rapid prototyping and design iteration, followed by a fine subtractive process for final precision manufacturing. This segmentation allows each stage to be optimized independently, with the additive stage enabling rapid prototyping and the subtractive stage ensuring manufacturing precision, thereby resolving the contradiction between speed and precision.
Solution Approach 2:
The coarse additive process performs preliminary actions by creating a rough prototype with approximate dimensions and basic functionality. This preliminary structure serves as a foundation for subsequent fine subtractive processing, allowing rapid design iteration and validation before the final precision manufacturing step, thus reducing overall production time while maintaining precision.
2Manufacturing precision
If conventional cleanroom techniques are used to manufacture biological microdevices, then manufacturing precision and reliability are improved, but equipment cost increases
Solution Approach 1:
The manufacturing process is divided into two stages using different equipment: a coarse additive process using inexpensive makerspace or benchtop 3D printers for rapid prototyping, and a fine subtractive process using precision tools for final manufacturing. This segmentation eliminates the need for expensive cleanroom equipment throughout the entire process, reducing equipment cost while maintaining manufacturing precision through the specialized fine subtractive stage.
Solution Approach 2:
The invention employs inexpensive makerspace and benchtop technologies for the coarse additive process, using affordable 3D printers and basic materials instead of expensive cleanroom equipment. This approach uses cheaper, more accessible tools for the prototyping phase, significantly reducing equipment cost while still achieving the necessary precision through the subsequent fine subtractive processing.
3Manufacturing precision
If conventional cleanroom techniques are used to manufacture biological microdevices, then manufacturing precision is improved, but design complexity increases
Solution Approach 1:
The manufacturing process is segmented into a coarse additive stage that handles design iteration and prototyping with lower design complexity requirements, and a fine subtractive stage that refines the design to achieve manufacturing precision. This segmentation allows designers to focus on functional requirements in the additive stage without being constrained by the need for perfect precision, reducing overall design complexity while still achieving the necessary precision in the final product.
4Reliability
If conventional cleanroom techniques are used to manufacture biological microdevices, then reliability is improved, but productivity decreases
Solution Approach 1:
The manufacturing process is divided into a coarse additive process that rapidly produces prototypes with acceptable reliability for validation, and a fine subtractive process that enhances reliability by achieving precise dimensional control and surface quality. This segmentation enables rapid iteration and validation in the additive stage, followed by precision refinement in the subtractive stage, thereby improving both productivity and reliability.
Solution Approach 2:
The coarse additive process performs preliminary manufacturing actions that rapidly produce functional prototypes, enabling quick validation and iteration. This preliminary production increases productivity by allowing rapid design iteration, while the subsequent fine subtractive process maintains reliability by ensuring precise dimensional accuracy and surface quality in the final product.
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 significantly reduces production time from months to days and costs by approximately 90%, facilitating the rapid and cost-effective fabrication of biological microdevices with precise dimensions and functionalities.
Implementation Method 1
3D printing a base of an object with a 3D printer and a biocompatible material. The 3D printing is performed using an optical signal oriented at an angle with respect to a surface of the biocompatible material
Data Source
AI summary
A method for forming a biological microdevice includes applying a biocompatible coarse scale additive process with an additive device and a biocompatible material to form an object. The coarse scale is a dimension not less than about 100 μm. The method also includes applying a biocompatible fine scale subtractive process with a subtractive device to the object. The fine scale is a dimension not greater than about 1000 μm. The method also includes moving the object between the additive device and the subtractive device. A system is also provided for performing the above method and includes the additive device, the subtractive device, a means for transporting the object between the additive device and subtractive device and a processor with a memory including instructions to perform one or more of the above method steps.