US 12,135,456 B2
Waveguide cores with a dual-trapezoidal shape
Yusheng Bian, Ballston Lake, NY (US); Koushik Ramachandran, Wappingers Falls, NY (US); and Karen Nummy, Newburgh, NY (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Jun. 27, 2022, as Appl. No. 17/850,128.
Prior Publication US 2023/0417991 A1, Dec. 28, 2023
Int. Cl. G02B 6/122 (2006.01); G02B 6/136 (2006.01); G02B 6/14 (2006.01); G02B 6/30 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/1228 (2013.01) [G02B 6/136 (2013.01); G02B 6/14 (2013.01); G02B 6/305 (2013.01); G02B 2006/12121 (2013.01); G02B 2006/12123 (2013.01); G02B 2006/12152 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a first waveguide core including a section having a first trapezoidal portion and a second trapezoidal portion stacked with the first trapezoidal portion, the first trapezoidal portion having a first trapezoidal shape, and the second trapezoidal portion having a second trapezoidal shape different from the first trapezoidal shape,
wherein the section of the first waveguide core is tapered, the section of the first waveguide core terminates at an end, and the first trapezoidal shape and the second trapezoidal shape extend to the end of the section of the first waveguide core.