Semiconductor layer structure having an aluminum-silicon alloy layer
First Claim
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1. A semiconductor layer structure comprising:
- a silicon substrate;
an alloy layer of aluminum and silicon formed on the silicon substrate, the concentration of silicon contained in the aluminum-silicon alloy layer being within a range of 10 to 75 weight percent;
a barrier layer formed on top of the aluminum-silicon alloy layer; and
a metallic layer formed on top of the barrier layer, the barrier layer preventing the silicon contained in the alloy layer from diffusing into the metallic layer.
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Abstract
A semiconductor layer structure includes an alloy layer of aluminum and silicon formed on a silicon substrate. The concentration of silicon contained in the aluminum-silicon alloy layer is within a range of 10 to 75 weight percent. A barrier layer is formed on top of the aluminum-silicon alloy layer, and a metallic layer is formed on top of the barrier layer.
27 Citations
8 Claims
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1. A semiconductor layer structure comprising:
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a silicon substrate; an alloy layer of aluminum and silicon formed on the silicon substrate, the concentration of silicon contained in the aluminum-silicon alloy layer being within a range of 10 to 75 weight percent; a barrier layer formed on top of the aluminum-silicon alloy layer; and a metallic layer formed on top of the barrier layer, the barrier layer preventing the silicon contained in the alloy layer from diffusing into the metallic layer. - View Dependent Claims (2, 3, 4)
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5. A semiconductor layer structure comprising:
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a silicon substrate; a first alloy layer of aluminum and silicon formed on the silicon substrate, the concentration of silicon contained in the first alloy layer being within a range of 10 to 75 weight percent; a barrier layer formed on top of the aluminum-silicon alloy layer; and a second alloy layer of aluminum formed on top of the barrier layer, the concentration of aluminum contained in the second alloy layer being greater than the concentration of aluminum contained in the first alloy layer. - View Dependent Claims (6)
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7. A semiconductor device comprising:
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a silicon substrate having an impurity diffused region; a first layer structure formed on top of a surface portion of the silicon substrate which has a conduction type different from the impurity diffused region; and a second layer structure formed on top of the impurity diffused region, each of the first and second layer structures comprising; an alloy layer of aluminum and silicon formed on the corresponding surface portion of silicon substrate, the concentration of silicon contained in the aluminum-silicon alloy layer being within a range of 10 to 75 weight percent; a barrier layer formed on top of the aluminum-silicon alloy layer; and a metallic layer formed on top of the barrier layer. - View Dependent Claims (8)
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Specification