Electronic Device Having a Sealed Biometric Input System

A portable electronic device, comprising:

• a housing member defining a side wall of a hole extending through the housing member;
• a display;
• a transparent cover over the display and coupled to the housing member;
• a button member positioned along a side of the housing member and defining:
• a chassis portion;
• and
• a post extending from the chassis portion and positioned at least partially in the hole, the post defining a passage extending through the post from the chassis portion to an end of the post;
• a biometric sensing component coupled to the chassis portion;
• and
• a flexible circuit element extending through the passage and conductively coupling the biometric sensing component to a component within the portable electronic device.

A portable electronic device, comprising:

• a housing defining a side surface of the portable electronic device;
• a display at least partially within the housing;
• a transparent cover over the display and coupled to the housing;
• a button member positioned along the side surface and defining a hollow post extending into a hole defined through the housing;
• a biometric sensing component coupled to the button member;
• a cap covering the biometric sensing component and secured to the button member;
• a flexible circuit element extending through the hollow post and electrically coupling the biometric sensing component to a component within the housing;
• and
• a potting material at least partially encapsulating the flexible circuit element and the biometric sensing component and at least partially filling the hollow post.