Wafer level testing for RFID tags
First Claim
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1. A semiconductor wafer, comprising:
- a reticle containing circuitry for a plurality of individual semiconductor chips separated by scribe regions, said reticle having at least one die location containing a wafer test probe landing cite to receive test signals to test at least a group of said individual semiconductor chips, said wafer test probe landing cite wired to said individual semiconductor chips through at least one of said scribe regions so that said test signals are transported through said at least one of said scribe regions, wherein, at least one test signal path that flows within one of said at least one scribe regions also includes;
a first wiring element above said wafer'"'"'s semiconductor substrate;
a via coupled to said first element and that makes electrical contact to a conducting path that flows through said substrate beneath a scribe line;
a second via that makes electrical contact to said conducting path on an opposite side of said scribe line from said via; and
a second wiring element above said wafer'"'"'s semiconductor substrate coupled to said second via.
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Abstract
Technologies suitable for on-wafer testing in the ubiquitous computing era are disclosed. Among the inventive features disclosed are: 1) clustering of wafer test probe landing area sites for parallel test sequencing; 2) on wafer test wiring that runs along the wafer'"'"'s scribe regions; 3) on-wafer test wiring that can be scribed and yet thwart the spread of contamination into the product die; 4) an RFID tag design that allows for on-wafer testing without imposing substantial semiconductor surface area penalty; 5) an RFID tag design that includes built-in self test (BIST) circuitry for the RFID tag'"'"'s non-volatile memory.
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Citations
26 Claims
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1. A semiconductor wafer, comprising:
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a reticle containing circuitry for a plurality of individual semiconductor chips separated by scribe regions, said reticle having at least one die location containing a wafer test probe landing cite to receive test signals to test at least a group of said individual semiconductor chips, said wafer test probe landing cite wired to said individual semiconductor chips through at least one of said scribe regions so that said test signals are transported through said at least one of said scribe regions, wherein, at least one test signal path that flows within one of said at least one scribe regions also includes; a first wiring element above said wafer'"'"'s semiconductor substrate; a via coupled to said first element and that makes electrical contact to a conducting path that flows through said substrate beneath a scribe line; a second via that makes electrical contact to said conducting path on an opposite side of said scribe line from said via; and a second wiring element above said wafer'"'"'s semiconductor substrate coupled to said second via. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A semiconductor wafer, comprising:
a reticle containing circuitry for a plurality of individual semiconductor chips separated by scribe regions, said reticle having at least one die location containing a wafer test probe landing cite to receive test signals to test at least a group of said individual semiconductor chips, said wafer test probe landing cite wired to said individual semiconductor chips through at least one of said scribe regions so that said test signals are transported through said at least one of said scribe regions, wherein, each of said individual semiconductor chips comprise a receive signal path from one or more primary inputs to a controller, said receive signal path to process an electrical receive signal originating from said input(s) as a consequence of said input(s) having received a wireless signal, a second signal path flowing into said receive signal path from a die edge, said second signal path to transport an electrical test signal provided from said wafer test probe landing cite. - View Dependent Claims (19, 20, 21)
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22. A semiconductor wafer, comprising:
a reticle containing circuitry for a plurality of individual semiconductor chips separated by scribe regions, said reticle having at least one die location containing a wafer test probe landing cite to receive test signals to test at least a group of said individual semiconductor chips, said wafer test probe landing cite wired to said individual semiconductor chips through at least one of said scribe regions so that said test signals are transported through said at least one of said scribe regions, wherein each one of said semiconductor chips is an RFID tag semiconductor chip, and wherein each one of said individual RFID tag semiconductor chips comprises a receive signal path from one or more inputs to a controller, said receive signal path to process an electrical receive signal originating from said input(s) as a consequence of said input(s) having received a wireless signal, a second signal path flowing into said receive signal path from a die edge, said second signal path to transport an electrical test signal provided by said wafer test probe landing site. - View Dependent Claims (23, 24, 25, 26)
Specification