Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.