US 12,436,330 B2
Light color coatings for electronic devices
Lijie Bao, Saratoga, CA (US); Jiayun Liu, Suzhou (CN); Fei Tong, Shanghai (CN); Jozef M. Matlak, Berkeley, CA (US); Sonja R. Postak, Palo Alto, CA (US); and Brian S. Tryon, Redwood City, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Aug. 27, 2021, as Appl. No. 17/459,843.
Claims priority of provisional application 63/183,558, filed on May 3, 2021.
Prior Publication US 2022/0350062 A1, Nov. 3, 2022
Int. Cl. G04G 17/02 (2006.01); G02B 5/28 (2006.01); G02F 1/1333 (2006.01); G04G 17/00 (2013.01); H04M 1/02 (2006.01); H04M 1/23 (2006.01); G06F 1/16 (2006.01)
CPC G02B 5/286 (2013.01) [G02F 1/133308 (2013.01); G04G 17/00 (2013.01); H04M 1/0283 (2013.01); H04M 1/236 (2013.01); G02F 1/133331 (2021.01); G02F 2202/28 (2013.01); G04G 17/02 (2013.01); G06F 1/163 (2013.01); G06F 1/1637 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Apparatus comprising:
a conductive substrate; and
a coating on the conductive substrate and having a color, the coating comprising:
adhesion and transition layers, and
a thin-film interference filter on the adhesion and transition layers, wherein the thin-film interference filter comprises an SiCrN layer and a CrN layer, the CrN layer being an uppermost layer of the thin-film interference filter and the SiCrN layer being a lowermost layer of the thin-film interference filter, and wherein, at a location of maximum thickness, the coating has an L* value greater than 60 in an L*a*b* color space, an a* value between −5 and 0 in the L*a*b* color space, and a b* value between −10 and −20 in the L*a*b* color space.