Robert M. Ecker;Jonathan P. Roberts;Timothy J. Davis;Can Cinbis;James D. Reinke;Jonathan L. Kuhn;Paul F. Gerrish
发明人:
Robert M. Ecker,Jonathan L. Kuhn,James D. Reinke,Can Cinbis,Timothy J. Davis,Paul F. Gerrish,Jonathan P. Roberts
申请号：
US12107921
公开号：
US08452402B2
申请日:
2008.04.23
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A reflectance-type optical sensor includes one or more photodiodes formed in a semiconductor substrate. A well having sidewalls and a bottom is formed in the top surface of the substrate, and a reflective layer is formed on the sidewalls and bottom. A light-emitting diode (LED) is mounted in the well, so that light emitted laterally and rearwardly from the LED strikes the sidewalls or bottom and is redirected in a direction generally perpendicular to the top surface of the substrate. The optical sensor can be fabricated using microelectromechanical systems (MEMS) fabrication techniques.
