US 11,721,714 B2
Pixel isolation elements, devices and associated methods
Martin U. Pralle, Wayland, MA (US); Jeffrey McKee, Tualatin, OR (US); and Jason Sickler, Arlington, MA (US)
Assigned to SiOnyx, LLC, Beverly, MA (US)
Filed by SiOnyx LLC, Beverly, MA (US)
Filed on Mar. 26, 2021, as Appl. No. 17/214,333.
Application 17/214,333 is a continuation of application No. 16/290,740, filed on Mar. 1, 2019, granted, now 10,985,198.
Application 16/290,740 is a continuation of application No. 15/216,244, filed on Jul. 21, 2016, granted, now 10,224,359, issued on Mar. 5, 2019.
Application 15/216,244 is a continuation of application No. 14/747,875, filed on Jun. 23, 2015, granted, now 9,905,599, issued on Feb. 27, 2018.
Application 14/747,875 is a continuation of application No. 13/841,120, filed on Mar. 15, 2013, granted, now 9,064,764, issued on Jun. 23, 2015.
Claims priority of provisional application 61/614,275, filed on Mar. 22, 2012.
Prior Publication US 2021/0217788 A1, Jul. 15, 2021
Int. Cl. H01L 27/146 (2006.01)
CPC H01L 27/1463 (2013.01) [H01L 27/1462 (2013.01); H01L 27/14607 (2013.01); H01L 27/14625 (2013.01); H01L 27/14627 (2013.01); H01L 27/14629 (2013.01); H01L 27/14645 (2013.01); H01L 27/14685 (2013.01); H01L 27/14689 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light trapping device, comprising:
at least one light sensitive pixel having a light incident surface, a backside surface opposite the light incident surface, and a peripheral sidewall disposed into at least a portion of the pixel and extending at least substantially around the pixel periphery;
a backside light trapping material at least partially covering the backside surface; and
a peripheral light trapping material substantially covering the peripheral sidewall;
wherein light contacting the backside light trapping material or the peripheral light trapping material is reflected back toward the pixel;
wherein at least one of the backside light trapping material or the peripheral light trapping material includes a high refractive index material sandwiched between two low refractive index materials.