A more thorough explanation:

Definition: A mask work is a three-dimensional pattern made of metallic insulation or semiconducting material that is present or removed from the layers of a computer chip. It is protected under the Semiconductor Chip Protection Act of 1984.

Example: When creating a computer chip, a mask work is used to create the pattern of the chip's circuitry. This pattern is then transferred onto the chip using a process called photolithography.

Explanation: The example illustrates how a mask work is used in the creation of a computer chip. The pattern created by the mask work is essential to the functioning of the chip, as it determines the flow of electricity through the circuitry. The protection of mask works under the Semiconductor Chip Protection Act ensures that the creators of these patterns are able to profit from their work and prevent others from copying their designs.