Patent ID: 6777703
Filing Date: 2004-08-17
Classification: H01L

Abstract:
A method of fabricating an optically coupled device having an assembly of a photoemitter emitting light of a predetermined level according to a flow of an input current and a photodetector receiving light emitted from said photoemitter to provide an output current, comprising:one or more current transmission rate calculation steps of calculating a current transmission rate which is a ratio of said output current to said input current under a presumptive assembly condition, and one or more determination steps of determining whether said current transmission rate of each of said one or more current transmission rate calculation steps is a value within a particular range, wherein, when determination is made that said current transmission rate is not a value within said particular range at each of said one or more determination steps, said presumptive assembly condition is modified to another assembly condition so that said current transmission rate becomes a value within said particular range or approximates said particular range, and said one or more determination steps is conducted until said current transmission rate becomes a value in said particular range, said photoemitter and said photodetector being assembled eventually under an assembly condition where said current transmission rate becomes a value in said particular range.