Appeal No. 1996-4073
Application No. 08/345,917
is formed on semiconductor substrate 40. Epitaxial layer 44
forms an anode of detector diode 42. Semiconductor substrate
40 also forms a cathode of detector diode 42. Looking at
Figure 8, an integrated light emitting diode 62/detector diode
63 is mounted on a lead frame
51 at mounting area 59, and photo detector diode 61 is at
mounting area 58. Mounting areas 58 and 59 are coplanar.
Independent claim 31 is reproduced as follows:
31. A linear integrated optocoupler comprising:
an integrated light emitting diode and detector
diode wherein said detector diode detects light emitted by
said light emitting diode and provides a signal for
linearizing a response of said light emitting diode, said
integrated light emitting diode and detector diode comprising:
a semiconductor substrate;
a first epitaxial layer formed on a first side of
said semiconductor substrate;
a second epitaxial layer formed on a second side of
said semiconductor substrate, said first and second sides of
said
semiconductor substrate oppose one another, said first
epitaxial layer is an anode of said light emitting diode, said
second epitaxial layer is an anode of said detector diode, and
said semiconductor substrate is a common cathode of said
integrated light emitting diode and detector diode;
a photodetector diode for receiving light emitted by
said light emitting diode;
a lead frame including a first area and a second
3
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Last modified: November 3, 2007