US 12,030,818 B2
Electronic devices including glass ceramic components
Christopher D. Prest, San Francisco, CA (US); Matthew S. Rogers, San Jose, CA (US); and Que Anh S. Nguyen, San Jose, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Aug. 12, 2021, as Appl. No. 17/401,194.
Claims priority of provisional application 63/090,375, filed on Oct. 12, 2020.
Prior Publication US 2022/0117094 A1, Apr. 14, 2022
Int. Cl. H05K 5/00 (2006.01); C04B 35/119 (2006.01); C04B 35/46 (2006.01)
CPC C04B 35/46 (2013.01) [C04B 35/119 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
an enclosure comprising:
an enclosure component defining a side surface of the enclosure;
a front cover assembly coupled to the enclosure component and comprising a front cover member formed from a first glass ceramic material, the front cover member having:
an average transmission greater than or equal to 80% for visible light;
a haze value less than 1%; and
an average transmission greater than or equal to 85% for infrared light in a wavelength range from 900 nm to 1.6 micrometers; and
a rear cover assembly coupled to the enclosure component and comprising a rear cover member formed from a second glass ceramic material, the second glass ceramic material having a dielectric constant less than 30;
a display positioned below the front cover member;
a front-facing biometric sensor assembly positioned below the front cover member, the front-facing biometric sensor assembly including:
an infrared emitter module configured to operate through the front cover member; and
an infrared image sensor configured to operate through the front cover member; and
a transceiver component of a wireless communication system positioned below the rear cover assembly.