Verifying individual probe contact using shared tester channels
First Claim
1. A method for performing a continuity test between a test device or probe card and individual contacts of a plurality of circuit dies in parallel, comprising:
- a. connecting each of a plurality of test device driver channels to a corresponding one of a plurality of contacts on each of said plurality of circuit dies such that each test device driver channel is shared among a corresponding contact on each of said plurality of circuit dies;
b. connecting a designated contact on each of the plurality of circuit dies to the plurality of contacts;
c. connecting each of a plurality of input/output channels of said test device to the designated contact of a corresponding one of said plurality of circuit dies such that each input/output channel of the test device is connected to the designated contact of a different one of said plurality of circuit dies; and
d. evaluating the voltage on the designated contacts of each of the plurality of circuit dies when a voltage is applied at the test device driver channel to determine whether contact is made between the test device driver channel and the corresponding contact on each of said plurality of circuit dies.
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Accused Products
Abstract
Verifying good electrical contact between pads of multiple circuit dies and a probe card or test device, where the driver channels of the test device or probe card device are connected in parallel to corresponding contacts on the circuit dies. Each of a plurality of test device or probe card device driver channels are connected to a corresponding one of a plurality of contacts on each of the plurality of circuit dies such that each test device driver channel is shared among a corresponding contact on each of said plurality of circuit dies. Logic circuitry on each chip connects each of the plurality of contacts to at least one designated contact to output from the device via said at least one designated contact a voltage that corresponds to a voltage at one of said plurality of contacts when a voltage is applied to said one of said plurality of contacts. A voltage is applied at the test device driver channel and the voltage on the designated contact of each of the circuit dies that is coupled to said plurality of contacts on the circuit die is evaluated to determine whether contact is made between the test device driver channel pin or terminal (either directly or via or probe card) and the corresponding contact on each of said plurality of circuit dies.
13 Citations
19 Claims
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1. A method for performing a continuity test between a test device or probe card and individual contacts of a plurality of circuit dies in parallel, comprising:
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a. connecting each of a plurality of test device driver channels to a corresponding one of a plurality of contacts on each of said plurality of circuit dies such that each test device driver channel is shared among a corresponding contact on each of said plurality of circuit dies;
b. connecting a designated contact on each of the plurality of circuit dies to the plurality of contacts;
c. connecting each of a plurality of input/output channels of said test device to the designated contact of a corresponding one of said plurality of circuit dies such that each input/output channel of the test device is connected to the designated contact of a different one of said plurality of circuit dies; and
d. evaluating the voltage on the designated contacts of each of the plurality of circuit dies when a voltage is applied at the test device driver channel to determine whether contact is made between the test device driver channel and the corresponding contact on each of said plurality of circuit dies. - View Dependent Claims (2, 3, 4)
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5. A method for performing a continuity test between a test device and contacts of a plurality of circuit dies in parallel, comprising:
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a. connecting each of a plurality of test device driver channels to a corresponding one of a plurality of contacts on each of said plurality of circuit dies such that each test device driver channel is shared among a corresponding contact on each of said plurality of circuit dies; and
b. evaluating the voltage on designated contact that is coupled to said plurality of contacts of each of said plurality of circuit dies when a voltage is applied at the test device driver channel to determine whether contact is made between the test device driver channel and the corresponding contact on each of said plurality of circuit dies in parallel. - View Dependent Claims (6, 7, 8, 9)
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10. A semiconductor integrated circuit device, comprising:
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a. a plurality of contacts that are associated with various functions of the integrated circuit device;
b. at least one designated contact through which data may be input to, or output from, the integrated circuit device; and
c. logic circuitry that connects each of the plurality of contacts to said at least one designated contact to output from the device via said at least one designated contact a voltage that corresponds to a voltage at one of said plurality of contacts when a voltage is applied to said one of said plurality of contacts. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A semiconductor integrated circuit device, comprising:
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a. a plurality of contacts that are associated with various functions of the integrated circuit device;
b. at least one designated contact through which data may be input to, or output from, the integrated circuit device; and
c. means for connecting each of the plurality of contacts to said at least one designated contact to output from the device via said at least one designated contact a voltage that corresponds to a voltage at one of said plurality of contacts when a voltage is applied to said one of said plurality of contacts. - View Dependent Claims (17, 18, 19)
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Specification