Probe card that controls a temperature of a probe needle, test apparatus having the probe card, and test method using the test apparatus
First Claim
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1. A probe card comprising:
- a probe substrate having a signal line;
a probe needle connected to the signal line and fixed to the probe substrate; and
a thermostat for controlling the temperature of the probe needle, wherein the thermostat comprises a temperature detection sensor contacting the probe needle to detect the temperature of the probe needle.
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Abstract
Provided are a probe card, a test apparatus having the probe card, and a test method using the test apparatus. The probe card includes a probe substrate having a signal line, a probe needle connected to the signal line and fixed to the probe substrate, and a cooling unit for cooling the temperature of the probe needle. Therefore, the probe needles contacting each chip can be maintained at a certain low temperature without increasing the temperature. As a result, it is possible to pervent deformation of the probe needles and minimize an amount of impurities stuck to the probe needles.
8 Citations
28 Claims
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1. A probe card comprising:
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a probe substrate having a signal line; a probe needle connected to the signal line and fixed to the probe substrate; and a thermostat for controlling the temperature of the probe needle, wherein the thermostat comprises a temperature detection sensor contacting the probe needle to detect the temperature of the probe needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A test apparatus comprising:
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a wafer chuck for mounting a wafer having a plurality of chips; a probe card having a probe needle contacting a pad of the chip to transmit an electrical signal to the chip, a probe substrate having a signal line to be connected to the probe needle, and a thermostat for controlling the temperature of the probe needle; and a tester for generating a test signal to test the chip and transmitting the test signal to the probe card, wherein the thermostat comprises a temperature detection sensor contacting the probe needle to detect the temperature of the probe needle. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A test method, comprising:
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bringing a probe needle into contact with a pad of a chip formed on a wafer; transmitting a test signal to the chip through the pad; and controlling the temperature of the probe needle, wherein controlling the temperature of the probe needle further comprises detecting the temperature of the probe needle through a temperature detection sensor contacting the probe needle. - View Dependent Claims (17, 18, 19, 20)
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21. A probe card comprising:
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a probe substrate having a signal line; a probe needle connected to the signal line and fixed to the probe substrate; and a thermostat for controlling the temperature of the probe needle, wherein the thermostat comprises a cooling unit for lowering the temperature of the probe needle and the cooling unit comprises a Peltier module for cooling the probe needle according to a predetermined direct current, wherein the Peltier module comprises a first metal member for absorbing heat of the probe needle to cool the probe needle, second metal members respectively connected to one end and the other end of the first metal member to emit the absorbed heat and formed of materials different from the first metal member, and a power source for supplying a predetermined direct current through ends of the second metal members to cool or heat the first and second metal members. - View Dependent Claims (22, 23, 24, 25)
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26. A test apparatus comprising:
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a wafer chuck for mounting a wafer having a plurality of chips; a probe card having a probe needle contacting a pad of the chip to transmit an electrical signal to the chip, a probe substrate having a signal line to be connected to the probe needle, and a thermostat for controlling the temperature of the probe needle; and a tester for generating a test signal to test the chip and transmitting the test signal to the probe card, wherein the thermostat comprises a cooling unit for lowering the temperature of the probe needle, and wherein the cooling unit comprises a Peltier module having a first metal member for absorbing heat of the probe needle to cool the probe needle, second metal members respectively connected to one end and the other end of the first metal member to emit the absorbed heat and formed of materials different from the first metal member, and a power source for supplying a predetermined direct current through ends of the second metal members to cool or heat the first and second metal members. - View Dependent Claims (27, 28)
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Specification