Systems and methods for fabricating 3D soft microstructures

Patent metadata

Field	Value
Publication number	US-11014804-B2
Application number	US-201816493746-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Mar 14, 2017
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

Systems and methods for fabricating 3D soft microstructures. The system comprises injecting a pressurized, curable liquid into certain structural layers induces folding and allows the 2D structures to reconfigure into a 3D form In addition to the injection of a curable liquid that permanently reconfigures the structure of the system, in an embodiment this method also allows for the injection of other liquids into certain actuator layers that enable motion in certain portions of the system Furthermore, the system allows for handling of colored fluids that are passed to visualization layers. The method of creating such a system depends on taking advantage of laser machining of the individual layers to influence the behavior of how different portions bend and move.

First claim

What is claimed is:

1. A soft microstructure, comprising:
a plurality of elastomeric layers with fluidic networks formed between at least two of the elastomeric layers, at least one of the elastomeric layers comprising:
at least one structural actuator configured to accept a phase-changing material to convert the structural actuator into a permanent structural element by self-folding a portion of the microstructure to form a three dimensional structure from a two dimensional structure, and
at least one functional actuator configured to accept an inert working fluid to allow for motion of the 3D structure formed by the at least one structural actuator.

2. The soft microstructure of claim 1 , wherein any of the plurality of elastomeric layers contains at least one structural actuator or at least one functional actuator or both at least one structural actuator and the at least one functional actuator.

3. The soft microstructure of claim 1 , wherein the phase-changing material is a curable material that is configured to cause self-folding into a three dimensional structure as the curable material cures.

4. The soft microstructure of claim 1 , wherein the phase-changing material is a functional material such that the three dimensional structure is responsive to a stimuli.

5. The soft microstructure of claim 4 , wherein the stimuli is ultraviolet light such that the phase-changing material is cured with the UV light.

6. The soft microstructure of claim 4 , wherein the stimuli is thermal energy such that the phase-changing material is cured with the thermal energy.

7. The soft microstructure of claim 1 , wherein a form of the three dimensional structure is based on a number of the plurality of elastomeric layers.

8. The soft microstructure of claim 1 , wherein a form of the three dimensional structure is based on a placement and size of the fluidic networks formed in the plurality of elastomeric layers.

9. A soft microstructure, comprising:
a plurality of elastomeric layers with fluidic networks formed between at least two of the elastomeric layers, any of the elastomeric layers comprising:
at least one structural actuator configured to accept a phase-changing material to convert the structural actuator into a permanent structural element by self-folding a portion of the microstructure to form a three dimensional structure from a two dimensional structure, and
at least one functional actuator configured to accept an inert working fluid to allow for motion of the 3D structure formed by the at least one structural actuator.

10. The soft microstructure of claim 9 , wherein the at least one structural actuator and the at least one functional actuator are formed in the same elastomeric layer.

11. The soft microstructure of claim 9 , wherein the at least one structural actuator and the at least one functional actuator are formed in different ones of the plurality of elastomeric layers.

12. The soft microstructure of claim 9 , wherein a form of the three dimensional structure is based on a number of the plurality of elastomeric layers.

13. The soft microstructure of claim 9 , wherein a form of the three dimensional structure is based on a placement and size of the fluidic networks formed in the plurality of elastomeric layers.

Assignees

• Harvard College

Inventors

• Bartlett Nicholas W
• Ranzani Tommaso
• Russo Sheila
• Walsh Conor J
• Wehner Michael
• Wood Robert J

Classifications

• B81C1/00134

  comprising flexible or deformable structures (manufacture of MEMS devices for specific applications, see relevant places, e.g. gyroscopes G01C19/5719, pressure sensors G01L9/0042, accelerometers G01P15/0802, acoustic transducers or diaphragms therefor H04R31/00) · CPC title

• F16K99/0055

  actuated by fluids · CPC title

• F16K99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B81B3/0018 Primary

  Structures acting upon the moving or flexible element for transforming energy into mechanical movement or vice versa, i.e. actuators, sensors, generators · CPC title