TRANSPARENT CONDUCTIVE FILM WITH HIGH TRANSMITTANCE FORMED BY A REACTIVE SPUTTER DEPOSITION
First Claim
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1. A method of sputter depositing a transparent conductive layer, comprising:
- supplying a gas mixture into a processing chamber;
sputtering a source material from a target disposed in the processing chamber, wherein the target is fabricated from a zinc containing material having an aluminum containing dopant concentration less than 3 percent by weight; and
reacting the sputtered material with the gas mixture to deposit a transparent conductive layer on a substrate.
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Abstract
Methods for sputter depositing a transparent conductive layer are provided in the present invention. The transparent conductive layer may be utilized as a contact layer on a substrate or a back reflector in a photovoltaic device. In one embodiment, the method includes supplying a gas mixture into the processing chamber, sputtering source material from a target disposed in the processing chamber, wherein the target is fabricated from a zinc containing material having an aluminum containing dopant concentration less than 3 percent by weight, and reacting the sputtered material with the gas mixture.
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Citations
23 Claims
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1. A method of sputter depositing a transparent conductive layer, comprising:
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supplying a gas mixture into a processing chamber; sputtering a source material from a target disposed in the processing chamber, wherein the target is fabricated from a zinc containing material having an aluminum containing dopant concentration less than 3 percent by weight; and reacting the sputtered material with the gas mixture to deposit a transparent conductive layer on a substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sputter depositing a transparent conductive layer, comprising:
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providing a substrate in a processing chamber; supplying a gas mixture into the processing chamber; sputtering source material from a target disposed in the processing chamber; reacting the sputtered material with the gas mixture; and forming a transparent conductive layer on the substrate from the reacted sputtered material, wherein the transparent conductive layer is a zinc oxide layer having an aluminum oxide dopant concentration between about 0.25 percent by weight and about 3 percent by weight. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of sputter depositing a transparent conductive layer, comprising:
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providing a substrate in a processing chamber; supplying a gas mixture comprising at least an argon gas and an oxygen gas into the processing chamber; sputtering source material from a target fabricated from a zinc oxide material having an aluminum oxide dopant less than 3 percent by weight disposed in the processing chamber; and reacting the sputtered source material with the gas mixture to form a transparent conductive layer on the substrate. - View Dependent Claims (19, 20, 21, 22)
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23. A method of sputter depositing a transparent conductive layer, comprising:
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providing a substrate in a processing chamber; supplying a gas mixture comprising at least an argon gas and an oxygen gas into the processing chamber; sputtering source material from a target fabricated from a zinc oxide material having an aluminum oxide dopant less than 3 percent by weight disposed in the processing chamber; and reacting the sputtered source material with the gas mixture to form a transparent conductive layer on the substrate, wherein the transparent conductive layer is a ZnO layer having an Al2O3 dopant concentration between about 0.25 percent by weight and about 3 percent by weight.
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Specification