We’ve previously noted KGI Securities’ Ming-Chi Kuo for his often accurate reports on upcoming Apple products in the past. Usually those reports revolve around features that have been somewhat expected. We’ve expected a fingerprint scanner for quite some time and even found code that seems to point to a biometric input for the new iPhone. We’ve also profiled possible fingerprint readers in the iPhone 5S just last week.
Today’s report is something a bit out of left field however. Kuo expects the iPhone 5S to have a sapphire fingerprint reader home button that will no longer be plastic and concave but actually protrude slightly from the iPhone in a convex manner. This isn’t the first we’ve heard of Sapphire home buttons but the first reputable source on the matter. Kuo
Convex home button creates space for fingerprint sensor; yield to improve. We think that a fingerprint sensor will be placed under the home button of iPhone 5S. However, assembling it could be difficult as the space under home button is limited as it already has to accommodate the Lightning connector, speaker and microphone. Thus, we think the shape of the home button could be changed from concave to convex to create more space for a fingerprint sensor.
Sapphire prevents home button from being scratched. A convex home button could be more easily scratched, so a harder material is required. We believe Apple will switch from plastic to sapphire, whose hardness is second only to diamond. Sapphire would protect the home button from being scratched and the fingerprint sensor from being damaged.