The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2022
Filed:
Sep. 10, 2019
Facebook Technologies, Llc, Menlo Park, CA (US);
Thomas John Farrell Wallin, Redmond, WA (US);
Yigit Mengue, Kirkland, WA (US);
Pooya Saketi, Cork, IE;
Ali Sengül, Zurich, CH;
Nicholas Roy Corson, Woodinville, WA (US);
Katherine Healy, Redmond, WA (US);
Remi Alain Delille, Cork, IE;
Oscar Torrents Abad, Cork, IE;
Daniel Brodoceanu, Cork, CO;
Robert Manson, Seattle, WA (US);
Leif-Erik Sharif Simonsen, Kirkland, WA (US);
Facebook Technologies, LLC, Menlo Park, CA (US);
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.