A metallic patch attached to microwaveable packages of food in which radiant energy produced in the patch by microwaves helps cook the food, often by browning its surface.

• 电磁磁化物：可微波食物包装上的金属片，微波加热时此金属片产生辐射能，有助于烹煮食物，通常食物表面会烤至褐色