Facebook Technologies, LLC

Meta Platforms Technologies, LLC

Meta Platforms, Inc.

Thomas John Farrell Wallin

Andrew John Ouderkirk

Katherine Marie Smyth

Tanya Malhotra

Austin Lane

Christopher Yuan Ting Liao

Jack Lindsay

Yigit Menguc

Leif-Erik Sharif Simonsen

Yigit Mengue

Nicholas Roy Corson

Pooya Saketi

Daniel Brodoceanu

Oscar Torrents Abad

Kenneth Alexander Diest

Ali Sengül

Robert Manson

Katherine Healy

Remi Alain Delille

Lincoln Matthew Ghioni

Sandeep Rekhi

Pradip Sairam Pichumani

Nathan Scot Usevitch

Laura Blumenschein

Jan Fras

Sijia Huang

The disclosure provides systems for 3D printing. A 3D printer system includes one or more sources of actinic radiation characterized at least by a powered state and an unpowered state. A resin enclosure is transmissive to the actinic radiation. A temperature control system thermally communicates with the resin enclosure and maintains the resin enclosure at a predetermined sub-ambient chilled state. A control circuit is in electrical communication with the sources of actinic radiation and the temperature control system. The control circuit includes first non-transitory logic to switch the sources of actinic radiation to the powered state when one or more threshold criteria is satisfied including a requirement the temperature control system is in a predetermined state causing the resin enclosure to be below a temperature. A second non-transitory logic switches the sources of actinic radiation to the unpowered state when one or more threshold criteria is not satisfied.

Systems, methods, and devices for volumetric printing of solid state polymer resin

Systems, methods, and apparatuses may provide optical lenses comprising liquid crystal metasurfaces. Systems and methods may include a lens system comprising a first optical lens and a liquid crystal metasurface formed on the first optical lens, and a pair of electrodes positioned on opposite sides of the first optical lens. The pair of electrodes may individually tune sections of the liquid crystal metasurface to adjust an optical characteristic of the optical signal. A waveguide may be configured to receive the adjusted optical signal passed through the first optical lens and may provide the optical signal to an image sensor for an image.

Liquid crystal based metasurfaces for optical systems, methods, and devices

A polymer article is provided that includes a first silicone component formed from (i) a first siloxane polymer comprising a first plurality of hydride-functional groups and (ii) a second siloxane polymer comprising a first plurality of vinyl-functional groups. The polymer article also includes a second silicone component formed from (i) a third siloxane polymer comprising a second plurality of hydride-functional groups and (ii) a fourth siloxane polymer comprising a second plurality of vinyl-functional groups. Lastly, the polymer includes a contact interface, between the first and second silicone components, comprising chemical crosslinks between the first siloxane polymer and the fourth siloxane polymer. Notably, a tensile strength of the polymer article across the contact interface is substantially equal to a tensile strength of the first silicone component or the second silicone component alone.

Partial-cure bonding of silicones through temporary inhibition

A polymer composition that includes a blended resin having a viscosity below 10 pascal-seconds before exposure to actinic radiation is provided. The blended resin includes a first base component that is photocurable, and the first base component includes (i) a first siloxane polymer including a plurality of thiol groups and (ii) a second siloxane polymer including a plurality of functional groups with unsaturated carbon-carbon bond. The blended resin also includes a photoinitiator, a second base component that is condensation curable, and a catalyst. The first base component is configured to polymerize into a primary polymer network and the second base component is configured to polymerize into a secondary polymer network. Furthermore, the primary and secondary polymer networks together form an interpenetrating polymer network.

3D printed silicone double networks

The disclosure provides methods of generating a modulus gradient in a polymeric material, resin mixtures for such methods, and polymeric materials thereof having at least a modulus gradient.

Ternary orthogonal photopolymers

A pick-up head assembly comprises a body of a liquid crystalline elastomer (LCE) that undergoes a reversible expansion when exposed to a first frequency of light and contracts when exposed to a second frequency of light. Selective portions of the LCE in the pick-up head assembly are irradiated with the first frequency to cause an expansion in the selective portions. The adhesive forces of the expanded portions of the LCE are used to pick-up semiconductor devices from a first substrate. The semiconductor devices are placed on a second substrate by exposing the expanded portions of the LCE to the second frequency of light, causing the expanded portions to contract.

Liquid crystalline elastomer for pick and place of semiconductor devices

A method of forming a nanovoided composite polymer includes forming a resin-containing layer over a substrate, the resin-containing layer including a polymer-forming phase and a sacrificial phase, curing the polymer-forming phase to form a polymer matrix containing the sacrificial phase, and removing the sacrificial phase selectively with respect to the polymer matrix to form a nanovoided composite polymer including the polymer matrix and nanovoids dispersed throughout the polymer matrix. The nanovoids may be randomly or regularly dispersed throughout the matrix. Various other methods, systems, apparatuses, and materials are also disclosed.

Methods for forming ordered and disordered nanovoided composite polymers

In some embodiments, a device, such as a transducer, includes a polymer element disposed between electrodes, and a control circuit configured to apply electrical potentials having the same polarity to the electrodes. A separation distance between the electrodes may be increased by an electrostatic repulsion between the electrodes. Various other devices, systems, methods, and computer-readable media are also disclosed.

Transducers with electrostatic repulsion and associated systems and methods

A method and system for assembling a device by picking up semiconductor devices from a carrier substrate and placing the semiconductor devices onto a target substrate. The transfer of the semiconductor devices uses fluid as a transfer medium. The fluid enters a fluid channel of a pickup head, causing the pickup head to expand, make contact with, and attach to an aligned semiconductor device. After the semiconductor device is aligned with and placed onto the target substrate, at least a portion of the fluid is removed from the pickup head to release the semiconductor device onto the target substrate. The semiconductor device bonds to the target substrate.

Fluidic pick-up head for assembling light emitting diodes

In various embodiments, a method includes (1) applying a first voltage and a first current to an electroactive device that includes a nanovoided electroactive polymer, (2) measuring a second voltage and a second current associated with the electroactive device, (3) determining at least one of a position or a force output associated with the electroactive device, the position or the force based on the second voltage and the second current, and (4) applying a third voltage and a third current to the electroactive device based on the at least one of the position or the force output. Various other methods, systems, apparatuses, and materials are also disclosed.

Methods and systems for actuating electroactive materials

An actuation apparatus may be configured to apply forces to a user's skin using flexible-membrane actuators. Such an apparatus may include (i) an array of actuator chambers that include a flexible material layer enclosing a changeable volume of fluid, (ii) a contact surface that is coupled to each actuator chamber, and (iii) a support framework that is coupled to the actuator chambers such that the array of actuator chambers is disposed between the support framework and the contact surface, and such that distortion of actuator chambers caused by changing the volume of fluid within the actuator chambers causes the array of actuator chambers to exert forces on the contact surface and cause movement of the contact surface.

Apparatuses, systems, and methods for actuating a contact surface

In various embodiments, an electrode precursor material may be flowed into a manifold extrusion die having first and second manifold inlet openings. Further, an electroactive polymer precursor material may be flowed into the manifold extrusion die via a third manifold inlet opening such that the electroactive polymer precursor material is layered between alternating layers of the electrode precursor material from the first and second manifold inlet openings. Moreover, the electrode precursor material and the electroactive polymer precursor material may be extruded through a manifold outlet opening of the manifold extrusion die. Various other methods, systems, apparatuses, and materials are also disclosed.

Methods and systems for fabricating layered electroactive materials

A device may include a primary electrode, a secondary electrode overlapping at least a portion of the primary electrode, and an electroactive polymer element disposed between and abutting the primary electrode and the secondary electrode. The electroactive polymer element may include a nanovoided polymer material whereby resistance to deformation of the electroactive polymer element is non-linear with respect to an amount of deformation of the electroactive polymer element. Various other devices, method, and systems are also disclosed.

Growing community of inventors

Redmond, WA, United States of America

Thomas John Farrell Wallin