Wafer test apparatus including optical elements and method of using the test apparatus
First Claim
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1. A method of testing an electronic device on a wafer comprising:
- prior to packaging a first light source with the electronic device, driving a second light source external to the electronic device with an electrical output from the electronic device on the wafer;
supplying an optical output of the second light source to a photo detector; and
examining an electrical signal output from the photo detector.
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Abstract
Wafer-level testing is performed on an electronic device to be used in an optical communications system. An optical test signal is generated and is provided to a first photo detector. An electrical output of the first photo detector is supplied to the electronic device on the wafer. An electrical output from the electronic device on the wafer is used to drive a light source. An optical output of the light source is supplied to a second photo detector and an electrical signal output from the second photo detector is examined.
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Citations
7 Claims
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1. A method of testing an electronic device on a wafer comprising:
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prior to packaging a first light source with the electronic device, driving a second light source external to the electronic device with an electrical output from the electronic device on the wafer; supplying an optical output of the second light source to a photo detector; and examining an electrical signal output from the photo detector. - View Dependent Claims (2)
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3. A method of testing an electronic device on a wafer, comprising:
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generating an optical test signal; providing the optical test signal to a first photo detector; supplying an electrical output of the first photo detector to the electronic device on the wafer; driving a light source with an electrical output from the electronic device on the wafer; supplying an optical output of the light source to a second photo detector; and examining an electrical signal output from the second photo detector. - View Dependent Claims (4, 5, 6, 7)
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Specification