Patent ID: 6265240
Filing Date: 2001-07-24
Classification: G02B,H01L

Abstract:
A method for aligning, on a semiconductor die, a light detecting device for monitoring light output from a light producing device on said semiconductor die so as to cause an output signal of said light detecting device to be within a first specified range when said light producing device generates a light output power within a second specified range, said method comprising the steps of:providing a plurality of potential mounting locations on said die for said light detecting device such that a portion of said light output by said light producing device that is detected by said light detecting device varies as a function of said mounting location;generating data correlating mounting locations for light detecting devices to a characteristic of light producing devices;applying said data to said light detecting device and said light producing device to determine a mounting location for said light detecting device relative to said light producing device that will cause said output signal of said light detecting device to be within said first specified range when said light producing device generates said light output power within said second specified range;mounting said light producing device on said die; andmounting said light detecting device in a one of said potential mounting locations corresponding to said determined mounting location, whereby a portion of said light produced by said light producing device will be detected by said light detecting device.