Image heating apparatus, heater for heating image and manufacturing method thereof

A heater for heating an image, comprising:

• an elongated substrate;
• and
• a heat generating layer disposed on said substrate,
• wherein said substrate is made of a metal and has a convex portion in a longitudinal direction of said substrate.

An image heating apparatus, comprising:

• a heater;
• and
• a film having a surface which slides on said heater and another surface which moves in contact with a recording material bearing an image,
• wherein said film has an endless shape, and said heater is disposed inside said film and the image on the recording material is heated by heat emitted from said heater via said film, and
• wherein said heater includes a substrate made of a metal and a heat generating layer disposed on a side of said film, and a surface of said substrate on a side of said heat generating layer has a curved shape convex outside.

A heater for heating an image, comprising:

• an elongated substrate;
• and
• a heat generating layer disposed on said substrate,
• wherein said substrate is made of a metal and a surface of said substrate on a side of said heat generating layer has a curved shape convex outside.