Apparatus and method for wafer planarization
First Claim
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1. An apparatus for wafer planarization comprising:
- a liquid nitrogen supply tank;
a nitrogen gas transfer tube linked with the liquid nitrogen supply tank by a valve;
an etchant supply tube linked with the nitrogen gas transfer tube;
an etchant supply tank for containing etchant linked with the etchant supply tube; and
a chamber with a spray nozzle part linked with the nitrogen gas transfer tube attached to the upper part thereof and a wafer rotating equipment placed in the lower part thereof.
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Abstract
An apparatus and a method for wafer planarization is disclosed. A disclosed apparatus comprises a liquid nitrogen supply tube; a nitrogen gas transfer tube linked to the nitrogen gas supply tank by valve; an etchant supply tube linked with the nitrogen gas transfer tube; a spray nozzle part linked with the nitrogen gas supply tube; and a chamber with a spray nozzle attached to the upper part of the chamber and a wafer rotating equipment placed in the lower part. A disclosed apparatus and a method has advantage to planarize an entire surface of wafer by spraying high pressure of etchant vapor into a wafer surface rotating at high speed.
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Citations
9 Claims
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1. An apparatus for wafer planarization comprising:
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a liquid nitrogen supply tank;
a nitrogen gas transfer tube linked with the liquid nitrogen supply tank by a valve;
an etchant supply tube linked with the nitrogen gas transfer tube;
an etchant supply tank for containing etchant linked with the etchant supply tube; and
a chamber with a spray nozzle part linked with the nitrogen gas transfer tube attached to the upper part thereof and a wafer rotating equipment placed in the lower part thereof. - View Dependent Claims (2, 3, 4, 5)
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6. A method for wafer planarization comprising:
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emitting nitrogen gas to a nitrogen gas transfer tube;
mixing the emitted nitrogen gas and etchant;
planarizing a wafer by spraying the mixed etchant from a spray nozzle part linked with the nitrogen gas transfer tube onto the entire surface of the wafer; and
cleaning the wafer. - View Dependent Claims (7, 8, 9)
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Specification