Patent ID: 6852958

Claim:
A container designed to contain a product having to be heated by applying microwaves, having a side wall ( 10 ) and an end wall ( 12 ) formed by a base or a lid, the container comprising means ( 12 A) for concentrating the microwaves in a central region of the end wall ( 12 ) which are formed by an excess thickness ( 12 A) made from a dielectric material whose dielectric constant is at least equal to 1.5, wherein the container is mainly formed from an underlying dielectric material and further comprises means ( 10 A) for limiting the penetration of the microwaves through the side wall ( 10 ) which are formed by locally joining an electrically conducting material ( 10 A) to the said side wall so that this electrically conductive material ( 10 A) partially absorbs or reflects an electrical field in the region of said side wall.