Plating film, printed wiring board, and module substrate
First Claim
Patent Images
1. A plating film comprising:
- a nickel plating layer containing phosphorus; and
a gold plating layer formed on the nickel plating layer;
wherein the nickel plating layer has a phosphorus content of 11 to 16 mass %,wherein (3×
σ
×
100)/X is 10 or less, where X and σ
are the average value and standard deviation of the phosphorus content in a surface of the nickel plating layer on the gold plating layer side, respectively, andwherein the phosphorus content in the nickel plating layer is higher as the gold plating layer is nearer.
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Abstract
The present invention provides a plating film 50 including a nickel plating layer containing phosphorus and a gold plating layer formed on the nickel plating layer, wherein the nickel plating layer has a phosphorus content of 11 to 16 mass %, and wherein (3×σ×100)/X is 10 or less, where X and σ are the average value and standard deviation of the phosphorus content in a surface of the nickel plating layer on the gold plating layer side, respectively; and a module substrate 100 having the plating film 50.
14 Citations
15 Claims
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1. A plating film comprising:
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a nickel plating layer containing phosphorus; and a gold plating layer formed on the nickel plating layer; wherein the nickel plating layer has a phosphorus content of 11 to 16 mass %, wherein (3×
σ
×
100)/X is 10 or less, where X and σ
are the average value and standard deviation of the phosphorus content in a surface of the nickel plating layer on the gold plating layer side, respectively, andwherein the phosphorus content in the nickel plating layer is higher as the gold plating layer is nearer. - View Dependent Claims (2, 3)
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4. A plating film comprising:
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a nickel plating layer containing phosphorus; and a gold plating layer formed on the nickel plating layer; wherein the nickel plating layer has a phosphorus content of 11 to 16 mass %, and wherein (3×
σ
×
100)/X is equal or greater than 6.18 and is equal or less than 9.96, where X and σ
are the average value and standard deviation of the phosphorus content in a surface of the nickel plating layer on the gold plating layer side, respectively. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A plating film comprising:
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a nickel plating layer containing phosphorus; and a gold plating layer formed on the nickel plating layer; wherein the nickel plating layer has a phosphorus content of 11 to 16 mass %, wherein (3×
σ
×
100)/X is 10 or less, where X and σ
are the average value and standard deviation of the phosphorus content in a surface of the nickel plating layer on the gold plating layer side, respectively, andwherein a range of P2/P1 is between 1.05-1.8, where P2 represents the mass percentage of the phosphorus content in the surface of the nickel plating layer on the gold plating layer side, and P1 represents the mass percentage of the phosphorus content in another surface of the nickel plating layer which is opposite to the surface on the gold plating layer side. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification