Methods for preparing ball grid array substrates via use of a laser
First Claim
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1. A method for forming in a molding system comprising:
- providing the molding system with a substrate cleaning device;
introducing a substrate having a surface in the molding system;
preheating the substrate;
forming a resist layer;
baking the substrate; and
removing contaminants from the substrate using the substrate cleaning device.
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Abstract
A method of using a laser to remove surface contamination and oxidation from a ball grid array substrate. The laser etching can be configured to cover the entire substrate or pinpointed to the epoxy molding compound/solder resist (EMC/SR) interfaces. Additionally, a laser can be used to roughen the surface of a substrate to provide better adhesion when attaching the die to the substrate.
99 Citations
15 Claims
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1. A method for forming in a molding system comprising:
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providing the molding system with a substrate cleaning device;
introducing a substrate having a surface in the molding system;
preheating the substrate;
forming a resist layer;
baking the substrate; and
removing contaminants from the substrate using the substrate cleaning device. - View Dependent Claims (2, 3, 4, 5, 7, 8)
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6. A forming method in a molding system comprising:
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providing the molding system with a substrate cleaning device;
introducing a substrate having a surface in the molding system;
preheating the substrate;
forming a resist layer;
baking the substrate; and
removing contaminants from the substrate using the substrate cleaning device. - View Dependent Claims (9, 10)
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11. A method for forming a portion of a substrate in a molding system comprising:
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providing the molding system with a substrate cleaning device;
introducing a substrate having a surface in the molding system;
preheating the substrate;
forming a resist layer;
baking the substrate; and
removing contaminants from the substrate using the substrate cleaning device. - View Dependent Claims (12, 13, 14, 15)
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Specification